Rural Drinking Water & Sanitation DepartmentGovernment of Karnataka DETAILED PROJECT REPORT FOR GREYWATER MANAGEMENT IN KADAJJI GRAM PANCHAYAT November -2021 Prepared by- Vidwan Ventures Engineering Consultants Vidwan Ventures Engineering Consultants House no #03 Manmathnal, Hunagund Taluk, Bagalkot District, 587118 +918050128708, +919945754311 www.vidwanventures.com, [email protected]
Detailed Project Report for Greywater Management in Kadajji village Kadajji G.P. Davanagere District . Detailed Project Report for Greywater Management in Kadajji Gram Panchayat, September-2021 Submitted to: Rural Drinking Water & Sanitation Department, Government of Karnataka, 2nd Floor, KHB Building, E-Block,Kaveri Bhavana, Bengaluru-560 009 Submitted by: Vidwan Ventures Engineering Consultants House no #03 Manmathnal, Hunagund Taluk, Bagalkot District, 587118 +918050128708, +91 9945754311 www.vidwanventures.com, [email protected] Prepared by- Vidwan Ventures Engineering Consultants 2|P a g e
Detailed Project Report for Greywater Management in Kadajji village Kadajji . G.P. Davanagere District Project executive Summary 1 Proposal : Setting up of Greywater ManagementSystem in Kadajji 2 Name of the State/UT 3 Name of the City Gram Panchayat Population : Karnataka 4 As per 2011 Census : Kadajji Design year (2031) 5 Design capacity : 3205 Design year 6 Project Components : 2051 7 Land Required for Project and status of : land availability : : 8 Estimated cost (proposed) (Rs Lakh) : : 9 Annual O&M Expenditure (Rs Lakh) : 10 Agency responsible for O&M : 11 Estimated cost for consideration and approval (Rs Crore) Approval from RDW&SD 12 - - Prepared by- Vidwan Ventures Engineering Consultants 3|P a g e
Detailed Project Report for Greywater Management in Kadajji village Kadajji . G.P. Davanagere District Contents Table of Contents 1.1 Project Background ........................................................................................................ 8 1.2 About Kadajji Gram Panchayat...................................................................................... 8 1.3 Demographics................................................................................................................. 9 1.4 Climate: .......................................................................................................................... 9 1.5 Groundwater level: ......................................................................................................... 9 1.6 Soil type: ........................................................................................................................ 9 Scope……................................................................................................................................... 11 Methodology…. .......................................................................................................................... 13 2.1 Reconnaissance survey and primary data collection.................................................... 16 2.2 Topographic surveying with total station…................................................................. 18 2.3 Sample collection.. ....................................................................................................... 19 2.4 Flow measurements...................................................................................................... 19 2.5 Geotechnical investigation… ....................................................................................... 19 2.6 Laboratory tests for existing grey water....................................................................... 20 2.7 Hydrualic analysis for flow pattern.............................................................................. 21 2.8 Hydrualic design of proposed treatment solution.. ...................................................... 24 2.8.1 Grey Water Management Strategy for kadajji Gram Panchay..................................... 24 2.8.2 Design Consideration for Grey Water Management system….................................... 27 Laboratory Report....................................................................................................................... 29 Annexure 1- Individual Soak Pit…............................................................................................. 31 Design Drawings Estimate Annexure 2- Community Soakpit.. ............................................................................................. 33 Design Drawings Estimate Annexure 3- Waste Stabilisation Pond ....................................................................................... 35 Prepared by- Vidwan Ventures Engineering Consultants 4|P a g e
Detailed Project Report for Greywater Management in Kadajji village Kadajji . G.P. Davanagere District Design Drawings Estimate Recommentions........................................................................................................................... 38 References................................................................................................................................... 39 Prepared by- Vidwan Ventures Engineering Consultants 5|P a g e
Detailed Project Report for Greywater Management in Kadajji village Kadajji . G.P. Davanagere District List of Figures Fig 1. Zilla Panchayat Map (showing the location of Kadajji GP)………………………………9 Fig 2. Methodology……………………………………………………………………………..15 Fig 3. Survey Map………………………………………………………………………………18 Fig 4. Sample Collection………………………………………………………………………..19 Fig 5. Percolation test…………………………………………………………………………...20 Fig 6. Greywater Management in Low and Middle-Income countries, Eawag Aquatic Research, Morel A. and Diener S.2006………………………………………………………………....21 Fig 7. Grey water stagnation points in Kadajji village…………………………………………23 Fig 8. Drain condition (showing the location of Kadajji GP) ……………………………… …23 Prepared by- Vidwan Ventures Engineering Consultants 6|P a g e
Detailed Project Report for Greywater Management in Kadajji village Kadajji . G.P. Davanagere District List of Tables Table 1. Population Data (Source: Kadajji Gram Panchayat) ……………………………10 Table 2. Gender Ratio (Source: Socio Economic and Caste Census, Ministry of Rural Development)…………………………………………………………………………….….10 Table 3. Percolation rate table…………………………………………………………….20 Table 4. Grey water parameters…………………………………………………………...21 Table 5. Water supply scenario……………………………………………………………23 Table 6. Grey water quantity estimation…………………………………………………..23 Table 7. Grey Water Management Strategy……………………………………………….25 Table 8. Cost estimate……………………………………………………………………..36 Prepared by- Vidwan Ventures Engineering Consultants 7|P a g e
Detailed Project Report for Greywater Management in Kadajji village Kadajji G.P. Davanagere District . INTRODUCTION Prepared by- Vidwan Ventures Engineering Consultants 8|P a g e
Detailed Project Report for Greywater Management in Kadajji village Kadajji . G.P. Davanagere District 1.1 Project Background Grey water is the category of waste water generated by households from cooking, washing, bathing andother activities excluding faecal or urinal matter. Most rural areas in the country let domestic run-offs of grey water collect in open areas, or flow into water bodies through storm water drains. This is, in part,responsible for an increase in the environmental pollution and leading to several health issues. While substantially less harmful than black water (water that has been contaminated by faecal matter),grey water contains potentially hazardous chemical and biological particles. Additionally, untreated grey water is a wasted resource, which can be used to provide relief from acute water stress in many parts of India if reused after proper treatment for non-potable uses. Under the Swachha Bharat Mission-Gramin, Phase-II the Karnataka Rural Drinking Water and Sanitation Department is guiding the Zilla Panchayats across the State in planning and implementing grey water treatment/management systems in a scientific manner. This detailed project report (DPR) provides the complete details of the solutions for grey water management (GWM) for Kadajji Gram Panchayat. 1.2 About Kadajji Gram Panchayat According to Census 2011 information the location code or village code of Kadajji village is 606558. Kadajji village is located in Davanagere Tehsil of Davanagere district in Karnataka, India. It is situated 10km away from Davanagere, which is both district & sub-district headquarter of Kadajji village. As per 2009 stats, Kadajji village is also a gram panchayat. The total geographical area of village is 1347.96 hectares. Kadajji has a total population of 3,205 peoples. There are about 676 houses in Kadajji village. Davangere is nearest town to Kadajji which is approximately 10km away. Figure 1: Zilla Panchayat Map (showing the location of Kadajji GP) 9|P a g e Prepared by- Vidwan Ventures Engineering Consultants
Detailed Project Report for Greywater Management in Kadajji village Kadajji . G.P. Davanagere District 1.3 Demographics {Provide the following data for the Gram Panchayat as per recently available and verified data of thelast Census data, as applicable.} Population: Table 1: Population Data (Source: Kadajji Gram Panchayat) Village Name Population Kadajji 3205 Gender ratio (M: F): Table 2: Gender Ratio (Source: Socio Economic and Caste Census, Ministry of Rural Development) Village Name Ratio Kadajji 1.015 1.4 Climate: Kadajji has the semi-arid climate prevailing. It is warm to hot all year round and trees don’t grow here because of the drought. It consists mainly of sand with grasses and sometimes shrubs. The average annual temperature for Kadajji is 31° degrees and an average humidity of 62% and an UV- index of 6 In general, southwest monsoon contributes 58 % of total rainfall and northeast monsoon contributes 22 % rainfall. The remaining 20 % rainfall is received as sporadic rains in summer months. It receives low to moderate rainfall. Normal annual rainfall varies between 556 mm in Jagalur and 808 mm in Channagiri taluk. The normal annual rainfall in the district based on 70 years is 644 mm. However, in the last decade (1996-2005) the district received an average annual rainfall of the 607.57 mm 1.5 Groundwater level: In Davangere taluk fractured granitic-gneisses, gneisses and hornblendeschists are the main water bearing formations. Ground water occurs within the weathered and fractured rocks under water- table conditions and semi-confined conditions. Ground water exploration reveals that aquifers are encountered between the depths of 8.46 and 32 mbgl. In Davangere taluk bore wells were drilled from a minimum depth of 35 to a maximum of 200mbgl. Depth of weathered zone ranges from 5.5 mbgl to 30 mbgl. Yeild ranges from 1.5 to 4.0 lps. Transmissivity ranges from 5.27 to 110.67 m2 /day. Specific capacity ranges from 4.54 to 36.0 lpm/m draw down. 7 During May 2006 (pre- monsoon season) the minimum and maximum depth to water level was 4.28 mbgl and 7.65 mbgl respectively. During November 2006 (post-monsoon) water level ranged from 5.30 mbgl to 10.20 mbgl. 1.6 Soil type: Major part of the district is covered by red sandy soil and followed by black soil. Red sandy soil is spread throughout the district except in a small area in the northeastern part of the district where the Prepared by- Vidwan Ventures Engineering Consultants 10 | P a g e
Detailed Project Report for Greywater Management in Kadajji village Kadajji . G.P. Davanagere District area is covered by black soil. The Red Sandy soil comprises of red loams, red sandy, sandy loams and medium black soils. The geomorphology of the district is characterised by vast stretches of undulated plains interspersed with sporadic ranges or isolated clusters of low ranges of rocky hills. This may be broadly divided into two regions. The eastern hilly region consisting of Jagalur and north –eastern parts of Harpanahalli taluks and the plain region consisting of Harihar, Davangere, Honnali, Channagiri and parts of Harpanahalli taluks. Prepared by- Vidwan Ventures Engineering Consultants 11 | P a g e
Detailed Project Report for Greywater Management in Kadajji village Kadajji . G.P. Davanagere District Prepared by- Vidwan Ventures Engineering Consultants 12 | P a g e
Detailed Project Report for Greywater Management in Kadajji village Kadajji . G.P. Davanagere District The following below are scope of proposed project: Carrying out Topographical survey works in all villages with Total station for knowing the streetwise levels for proposing the gravity network of grey water until the outfall or proposed location of community soak pit. Carrying out the survey works for estimating the drainage pattern, location of the outfall & other works related to actual flow measurement. Geo- technical investigation of soil in order to know the type of the soil & its percolation capacity. Sample collection and testing those samples in laboratory for grey water parameters. Preparation of DPR with suitable technology for the grey water management for all villages. Preparation of Cost Estimate for the proposed technology & other allied works. Prepared by- Vidwan Ventures Engineering Consultants 13 | P a g e
Detailed Project Report for Greywater Management in Kadajji village Kadajji . G.P. Davanagere District METHODOLOGY Prepared by- Vidwan Ventures Engineering Consultants 14 | P a g e
Detailed Project Report for Greywater Management in Kadajji village Kadajji . G.P. Davanagere District Methodology for Grey Water Management project: Reconnaissance survey and primary data collection Topographic surveying with total station Sample collection and flow measurement Geotechnical investigation Laboratory test for existing grey water Hydraulic analysis for flow pattern Hydraulic design of proposed treatment solution DPR preparation with detailed estimates Administrative approval Tendering and work execution Figure 2: Methodology Prepared by- Vidwan Ventures Engineering Consultants 15 | P a g e
Detailed Project Report for Greywater Management in Kadajji village Kadajji . G.P. Davanagere District 2.1 Reconnaissance survey and primary data collection: Table 3: Survey Form Name of surveyor: Name of gram panchayat: Kadajji Name of village: Kadajji Date of survey: Survey Form Sl. Particulars Description No. 1 Number of families in the village 2 Population of the village 3 Water demand per capita 4 Number of OHT (overhead tank) in village 5 Capacity of OHT (overhead tank) 6 Disposal of grey water in the gram panchayat 7 Source of grey water 8 If the households are the source of grey water? How many households create grey water problem, 9 How many households are not connected to the drains? 10 How many Households are exempted from grey water management? 11 How many households having soak pits? Mark those houses in the map with survey number. 12 Any space availability (10 to 12 sqft) in house hold level for soak pit? 13 If yes, how many households? 14 Any space availability (>200sqft) in house hold level for kitchen garden? 15 if the mode of transportation is through drain, a Length of closed drain b Length of open drain 16 Is there any infiltration of black water/ solid waste in to the drains? 17 Out fall point of the grey water drain 18 Is there any land available when grey water at out fall or flow along the drain? If yes Mention in the layout drawing 19 If yes where and how much land available? 20 Is there any land allotted by the gram panchayat for grey water management Prepared by- Vidwan Ventures Engineering Consultants 16 | P a g e
Detailed Project Report for Greywater Management in Kadajji village Kadajji . G.P. Davanagere District 21 If yes, how much area of land is allotted? Attach the photographs. 22 Any current demand for using grey water? 23 If yes, how the grey water is to be used? 24 What is the water table level of the gram panchayat? 25 Is the map attached with photographs of showing major issues? 26 Total length of the drain (Each size) a b c d 27 Community buildings and waste water a Schools b Anganawadi c Hospitals d Hotel e Others Note: 1 Show the flow direction of grey water in the map 2 Mention the street number in map along with number of houses in street 3 Attach the google map along with the detailed layout map 4 Mention the how many households are discharging grey water in to the drains 5 Show the length of each drain 6 Annotate the each drain with different color in map with respect to the size of the drains 7 Show the issue points in the map 8 Attach the photographs of issue points 9 Attach the contour map with RL’s (indicating ground profile) 10 Outfall point/ treatment place is marked with Latitude and longitude of the place in the drawing. Authorized Signatory Prepared by- Vidwan Ventures Engineering Consultants 17 | P a g e
Detailed Project Report for Greywater Management in Kadajji village Kadajji . G.P. Davanagere District 2.2 Topographic surveying with total station: Prepared by- Vidwan Ventures Engineering Consultants 18 | P a g e
Detailed Project Report for Greywater Management in Kadajji village Kadajji . G.P. Davanagere District Figure 3: Survey map 2.3 Sample collection: Collecting a constant sample volume at varying time intervals proportional to the greywater flow. The samples are collected from the village from different location to perform the laboratory tests. Figure 4: Sample collection 2.4 Flow measurements: The Grey water flow rate is the volume of fluid that passes through a given cross-sectional area per unit time. Accurate flow rate measurement using an appropriate flowmeter. It is very easy to calculate the inflow of Grey water in to the treatment unit by this flow measurements. Based on the flow, design capacity will be decided. Following are some methods of flow measurements. Floating method Bucket fill method Instrument method 2.5 Geotechnical investigation Percolation test: A percolation test (colloquially called a perc test) is a test to determine the water absorption rate of soil in preparation for the building of a septic drain field (leach field) or infiltration basin. The results of a percolation test are required to properly design a septic system/soak pit system. In its broadest terms, percolation testing is simply observing how quickly a known volume of water dissipates into the subsoil of a drilled hole of known surface area. While every jurisdiction will have its own laws regarding the exact calculations for the length of line, depth of pit, etc., the testing procedures are the same. Prepared by- Vidwan Ventures Engineering Consultants 19 | P a g e
Detailed Project Report for Greywater Management in Kadajji village Kadajji . G.P. Davanagere District Table 3: Percolation rate table Figure 5: Percolation test 2.6 Laboratory test for existing grey water: The laboratory tests are conducted to determine the physical and chemical parameters. The permissible values of Grey water (for dispose/reuse) are as follows. Table 4: Grey water parameters Tests Unit Test values Permissible value pH value 0C Temperature mg/l 6.5-8.5 BOD (5days) mg/l mg/l <40 COD mg/l mg/l <10 Total suspended solids 100MPN/100ML <50 fecal coliform test mg/l <10 Total nitrogen test <100 <5 Greywater Characteristics Greywater characteristics strongly depend on the factors such as cultural habits, living standard household demography, and type of household chemical use. Typically, grey water contains Total solids (TS), Total Suspended Solids (TSS) which are bigger than 0.2μm, settleable and colloidal solids. Grey water contains 60% to 70% of readilydegradable organic solids and 30% of inorganic Prepared by- Vidwan Ventures Engineering Consultants 20 | P a g e
Detailed Project Report for Greywater Management in Kadajji village Kadajji . G.P. Davanagere District solids. The inorganic fraction is mostly sand and grit that settles to form and inorganic sludge layer. Total suspended solids comprise both settleable solids and colloidal solids. Suspended solids can be easily removed through settlingor filtration. Organic Constituents Biodegradable organic compounds are mainly composed of proteins, carbohydrates and fats. If discharged untreated into the environment, their biological stabilization can lead to the depletion of natural oxygen and development of septic conditions. Inorganic Constituents Figure 6: Greywater Management in Low and Middle-Income countries, Eawag Aquatic Research, Morel A. and Diener S.2006 (https://sswm.info/sites/default/files/reference_attachments/MOREL%20and%20DIENER%202006%20Greywater %20Management.pdf) Phosphorus are the two essential nutrients present in greywater. Greywater contains 10% or less than 10% of nitrogen of total water system and 10% to 30% of phosphorusof total water system. Nitrogen and Phosphorus, also known as the nutrients are essential for the growth of micro- organisms, plants and animals. When discharged into the aquatic environment, these nutrients can lead to the growth of aquatic life, which beyond a certain limitrob the water of dissolved oxygen which when discharged in excessive amounts on land can lead to groundwater pollution. {If readily available quality parameters are present for a location, provide the same here. An illustration has been provided below for better understanding. 2.7 Hydraulic analysis for flow pattern: Quantification of Greywater Rural areas in India are either currently supplied or intended to be supplied with an average 55 liters ofwater per capita per day. 65% to 70% of total water supplied is converted into grey water (Grey WaterManagement in Rural India, MDWS). This primarily includes waste water from the kitchen, Prepared by- Vidwan Ventures Engineering Consultants 21 | P a g e
Detailed Project Report for Greywater Management in Kadajji village Kadajji . G.P. Davanagere District bathroomand laundry. The volume and characteristics of grey water varies with lifestyle of the population. In order to quantify the amount of greywater reaching the treatment system, there are three methods ofcalculation: Population Generation method: HH level consumption averaged and range will guide HH level interventions / HH level contribution to storm water drains Water supply method: OHT level quantum to be converted to total takes total intoconsideration, not all of it might end up in drains; local rainfall records must be considered and diversion mechanism must be planned for GWM Flow measurement method: Actual flow at the outfall a more realistic capacity determination based on how much ends up at the outfall, conservative number for capacity; local rainfall records must be considered and diversion mechanism must be planned for GWM Water Supply Scenario: Table 5: Water supply scenario Water supply 55LPCD Overhead tank 2 Capacity of OHT 100000- and 50000-Liter capacity Frequency of water storage 2 times per day Water source Bore wells Quantity estimation– Table 5: Grey water quantity estimation Particular Unit Details Water supply LPCD 50.00 Grey water % 70.00 Grey water % 35.00 Total Population LPCD 3205 Quantity of greywater 112175 No Liters/Day Identified Gaps and Issues There is no proper treatment of grey water treatment and waste water is directly disposing in to the canal which leads to water pollution in the canal Untreated disposal of waste water is leads to health issues like dengue, diarrhea, malaria, etc.., Prepared by- Vidwan Ventures Engineering Consultants 22 | P a g e
Detailed Project Report for Greywater Management in Kadajji village Kadajji . G.P. Davanagere District The unlined drain is present before reaching in to waste water pond from the village which is almost blocked with some vegetations as shown in figure, which creates stagnation of the waste water. In the grey water drains observed that some solid waste. Regular maintenance is required for removal of solid waste from the drains Figure 7: Grey water stagnation point in Kadajji village Figure 3: Drain condition (showing the location of Kadajji GP) 23 | P a g e Prepared by- Vidwan Ventures Engineering Consultants
Detailed Project Report for Greywater Management in Kadajji village Kadajji . G.P. Davanagere District 2.8 Hydraulic design of proposed treatment solution: 2.8.1 Grey Water Management Strategy for Kadajji Gram Panchayat Table 3: Grey Water Management Strategy Technology Suitable for Advantages Limitations Costs Applicability Option Minimal Kitchen garden Areas with large depending Coastal and hilly spaces available on the area areas with sparse around houses Independent of available developments centralized systems and Requires fair amount and types of helps in water of space at plants used conservation household level Easy to implement, no Needs continuous OPEX: Any other region Areas with low skills required and low maintenance for Minimal for where there is cost cleaning solids & cleaning space availability ground water table (>10 mbgl) Benefits of growing grease regularly solid at household level produce for consumption Dependent on waste/grease as well interest of accumulated householder over time Requires some cleaning activities Relatively cheap option every 4-5 months Areas with at least considering depending on the Dry and arid 10-12 sqft. implementation under amount of solids Rs. 350- regions of the available at MGNREGA today; accumulated 500/KLD State household level Caters to low capacities (up to Soak 0.8 KLD); pits/magic pits/soaking trenches Areas with No skill required to Grease traps if groundwater table construct/operate, deployed need (>10 mbgl) No/low nuisance; ideal continuous OPEX: Any region with for low groundwater maintenance Minimal for low groundwater table. cleaning table and Spacing of the pits solid conducive soil Soil type- gravely, and distance from waste/grease type to allow for water sources need accumulated percolation sandy or any other Can be done at to be over time type except black household as well as cotton community level maintained Areas which Easy to build with Requires large Smaller have ample locally available tractsof land villages with land available material and huge land simpledesigns and parcels useful if situated next to agricultural available next to fields Prepared by- Vidwan Ventures Engineering Consultants 24 | P a g e
Detailed Project Report for Greywater Management in Kadajji village Kadajji . G.P. Davanagere District fields Waste Resistant to Sludge needsto be Financially Stabilisation variations in removed weak GPs Pond loading and has periodically which might minimum otherwise find it difficult Areas with maintenance treatment to allocate limited requirements efficiency reduces budgetary resources for overtime resources for operation and regular O & maintenance M Areas where No equipment or Could lead to power required odour and soil quality is good enough mosquito nuisance if not designed for any kind of properly construction works Constructed Areas where Provides benefits of Will need Rs. Peri-urban wetlands- water bodies improvingmicro- continued 700- and densely with some are getting climate with flora populated primary and fauna maintenance,even 940/KL polluted development though not cost D areas screening & treatment Areas with Improves the overall intensive Heavy wide open landscapeof the area Ineffective for rainfall areas drains where wastewater with the wetlands in addition to can be set up providing wastewater high concentration either outside or of organics or inside the treatment metals etc. drains Areas where Some forms of plants soaking could also arrangements at generate the household revenues or community level are not possible due to space constraints Prepared by- Vidwan Ventures Engineering Consultants 25 | P a g e
Detailed Project Report for Greywater Management in Kadajji village Kadajji . G.P. Davanagere District Places with Nature based Will need Capex- Peri-urban and sufficient space treatment and continued Rs.44 densely availability and hence low O&M maintenance,even lakhs requirementand though not cost (100KLD populated daily flow of intensive Space areas combined costs intensive in cases ) Modular upgrade of where higher DEWATS wastewater or capacitypossible and degree of villages with feasible for different treatment required sewer systems OPEX: 2- Any other capacities; Operation 2.5 Lakhs region with Areas where Can treat sewage grade intensive dueto per annum local labour can regular addition of sufficient space be provided for wastewater also bio-media culture availability at Can handle outfall location regular and requires maintenance- variations in inflow skilled CAPEX- Peri-urban and weekly/monthly Improves the overall labour densely landscapeof the area Rs.39 populated basis lakhs areas in addition to (100KL Areas with providing wastewater D) erratic power supply and lack treatment of skilled Nature based labour treatment and hence low O&M Places with requirementand sufficient space availability and costs daily flow of combined wastewater or villages with sewer systems Phytorid Occupies lesser space Will require than othernature- sufficient Areas with based treatment primary OPEX- ~ Any other erratic power systems 3 region with screening and supply Improves the overall settlingof solids Lakhs per sufficient space landscapeof the area annum availability at in the inflow outfall location in addition to wastewater providing wastewater Maintaining treatment uniform flow through inletand outlet adjustments required to ensure efficacy of treatment Places with Nature based Requires large CAPE sufficient space systems and can tracts of land and X-Rs. therefore take continuous O& M 18 availability variation on loads Lakhs (100 Prepared by- Vidwan Ventures Engineering Consultants 26 | P a g e
Detailed Project Report for Greywater Management in Kadajji village Kadajji . G.P. Davanagere District Soil Bio KLD)* Technology MBBR Areas with Cost effective Continuous power OPEX-2 Peri-urban and based STP continuous compared to supplyleading to Lakhs p.a densely power supply conventional electro- Applicable to mechanicalsystems increase in CAPE populated villages with operatingcosts X:10- areas complete sewer Modular upgrade 100 of Minimumfeasible KLD: 6- coverage capacity inflow of 10KLD; possible; Capex intensive; 50 Areas with Lakhs reliable power Infrastructure 100-500 demands spatial KLD: 53 supply Lakhs- planning 1.75Cr 500-1000 KLD: 1.75- 2.35 crores OPEX: Rs. 3 -17 Lakhs (10-100 KLD) 2.8.2 Design considerations for Grey Water Management system The following sections cover a detailed outline of the design process of the greywater treatment system starting with criteria and considerations for the design, followed by the concept and implementation proposal. Treatment Objective Kadajji village having stagnation of waste water in the ponds which will leads to the mosquitoes breeding creating some unhealthy environment in the Kadajji village. In the other side the waste water is disposing in the canal (As shown in above Google photographs) is leading to water pollution in the canal. So, the main objective is to dispose the grey water in safe manner without creating environmental nuisance. Design Parameters Climatic Conditions The design and detailing of the treatment modules are carried out taking temperature, rainfall and humidity into consideration. The process will be run in a temperature range of 25 to 40 °Cwhich is a mesophilic range favorable to many beneficial bacteria. Prepared by- Vidwan Ventures Engineering Consultants 27 | P a g e
Detailed Project Report for Greywater Management in Kadajji village Kadajji . G.P. Davanagere District Odour Handling and treatment of greywater have been associated with odour problems. In this soak pit there is no odour problem for the surrounding environment. Site Selection Criteria Identification of treatment site is crucial for effective implementation of greywater management. Following parameters are taken into consideration for finalization of treatment sites: Scope for GWM at HH level: In the Kadajji village having ground water level 150 to 160 meters below the ground level so the household soak pit is most preferable in this. Geological Parameters: Assessment of existing geological conditions on-site like groundwater table, type of soil, flood-vulnerability, etc. is always recommended as it may directly affect the selection of technology options. Prepared by- Vidwan Ventures Engineering Consultants 28 | P a g e
Detailed Project Report for Greywater Management in Kadajji village Kadajji . G.P. Davanagere District Laboratory Report Prepared by- Vidwan Ventures Engineering Consultants 29 | P a g e
Detailed Project Report for Greywater Management in Kadajji village Kadajji . G.P. Davanagere District Prepared by- Vidwan Ventures Engineering Consultants 30 | P a g e
Detailed Project Report for Greywater Management in Kadajji village Kadajji . G.P. Davanagere District Annexure 1- Individual Soak Pit Prepared by- Vidwan Ventures Engineering Consultants 31 | P a g e
Detailed Project Report for Greywater Management in Kadajji village Kadajji . G.P. Davanagere District Individual Soak pits A soak pit, also known as a soak away or leach pit, is a covered, porous-walled chamber that allows water to slowly soak into the ground. A soak pit can also be used to dispose of the effluent from a septic tank. Pre-settled effluent from a Collection and Storage/Treatment or (Semi-) Centralized Treatment technology is discharged to the underground chamber from which it infiltrates into the surrounding soil. As greywater percolates through the soil from the soak pit, small particles are filtered out by the soil matrix and organics are digested by microorganisms. Thus, soak pits are best suited for soil with good absorptive properties; clay, hard packed or rocky soil is not appropriate. However, soak pits are easy and relatively quick to construct; and can be used on plain areas. Performance of soak pit depends on the permeability of soil. Pores of soil may get clogged with time and this can reduce the percolation capacity of a particular soak pit. Seasonal variations in the water table can also affect the performance greatly and a soak pit performs better in dry season. Merits: Low cost and easy to construct Dry environment: the entire wastewater from a household is absorbed by this underground structure. This results in dry premises; Freedom from the mosquito nuisance; and Odour-free environment; No drains required; Recharge of ground water: the wastewater enters the natural ecosystem and finally reaches to the ground water stream thus recharging the ground water source; and O&M costs are low and borne by individual. Demerits One of the demerits is possibility of ground water contamination if grey water is contaminated with faecal substance especially in the areas with high groundwater table. Prepared by- Vidwan Ventures Engineering Consultants 32 | P a g e
Detailed Project Report for Greywater Management in Kadajji village Kadajji . G.P. Davanagere District Prepared by- Vidwan Ventures Engineering Consultants
Design of Individual Soak Pit Total Households in Kadajji village 676 Population in Kadajji village 3205 Population for next 30 years 4692 Number of population per house 7 Number of households connected with each soak 1 Considering 40% households in village having individual soak pit Number of soak pits to be provided 406 Design of one individual soak pit Particulars Quantity Units No. of Houses Water Supply 1 No Population for Each House Total Population 55 LPCD Qunatity of watersupply Perculation Rate 7 No Percentage of Greywater Quantity of Greywater 7 No Area of Perculation 385 L/D Diameter of Soak Pit Depth of Soak Pit 3 Minutes Free board Total depth 70 % Area required for one soak pit Number of soak pits 269.5 L/D Total area required for all soak pits 2.28 m² 2.30 m² 0.6 m 1.1 m 0.3 m 1.4 m 0.28 m² 1 Nos 0.28 m² 0.00 Gunta 3.04 ft²
Detailed Project Report for Greywater Management in Kadajji village Kadajji . G.P. Davanagere District Prepared by- Vidwan Ventures Engineering Consultants
SCHEMATIC DRAWING OF INDIVIDUAL SOAK PIT Manh 0.10 G Inlet Pipe @ 75mm Ø 1.40 1.65 0.60 0.70 0.90 1.20 SECTION @AA Ø1.20 Ø A PLAN Inlet Pipe @ 75mm Ø ASSISTANT EXECUTIVE ENGINEER SECTION OFFICER
KADAJJI VILLAGE N hole @0.45 m Ø NW NE SE E Top RCC Slab 10cm Thick W L SW Over Flow Pipe S @ 100mm Ø 150mm Boulder Filling SL DESCRIPTION REVISION BY DATE RELEASED NO FOR 5cm Thick Perforated RRC Ring 1 KADAJJI VILLAGE GREY WATER MANAGEMENT INFORMATION FEASIBILITY 100mm Charcoal Filling PROJECT. DPR TENDER CONSTRUCTION CLIENT: RDW & S GOVERNAMENT OF KARNATAKA D P R CONSULTANT: 0 Vidwan Ventures Engineering Consultants House no #03 Manmathnal, Hunagund Taluk, Ø0.90 Ø0.70 Bagalkot District, 587118 Ø0.60 +918050128708, www.vidwanventures.com, [email protected] PROJECT: KADAJJI VILLAGE GREY WATER MANAGEMENT PROJECT. DRAWN ABHISHEK BY: NALATAWADA REVISION: DESIGNED ABHISHEK JOB NO: BY: NALATAWADA A CHECKED SHEET: BY: Over Flow Pipe @ 75mm Ø WORK NAME: STRUCTURAL DRAWING OF INDIVIDUAL SOAK PIT TITLE: INDIVIDUAL SOAK PIT EXECUTIVE ENGINEER SCALE: DRAWING NO:
509.090.2m6 m Canal 059.090.2m6 m 50.9090.2m6 m 598.12 m 598.02 m 5 HOUSES 5 HOUSES 5 HOUSES Waste 598.62 m Stagnate Pond 5 HOUSES 5 HOUSES 598.84 m 5 HOUSES 5 HOUSES 598.95 m 599.1 m PROPOSED LOCATION FOR Udasallama 599.12 m TRATMENT OF GREY WATER Temple 5 HOUSES 599.26 m 5 HOUSES Anjaneya 5 HOUSES 599.44 m 599.26 m599.23 m 599.26 m Temple 5 HOUSES 5 HOUSES 599.56m Community soak pit 599.26 m 0.00 m 599.26 m Old Basavanna Gudi Community soak pit 599.26 m 5 HOUSES 5 HOUSES 5 HOUSES 599.26 m 599.26 m 599.26 m 5 HOUSES 5 HOUSES 598.03 5 HOUSES 599.26 m Durgamma 599.26 m Temple 5 HOUSES 5 HOUSES 5 HOUSES 599.26 m 5 HOUSES 599.26 m 5 HOUSES 599.26 m 599.26 m 598.05m 599.26 m 599.26 m 599.26 m 5 HOUSES 5 HOUSES 5 HO 5 HOUSES 5H 5 HOUSES 5 HOUSES 5 HOUSES 599.26 m 599.26 m 5 HOUSES 5 HOUSES 599.26 m 5 HOUSES 5 HOUSES 599.26 m 5 HOUSES 5 HOUSES 599.26 m 5 HOUSES 5 HOUSES 599.26 m 5 HOUSES 5 HOUSES 599.26 m Basaveshwara Gudi 5 HOUSES 5 HOUSES 5 HOUSES 599.26 m 599.26 m 5 HOUSES 599.26 m 599.26 m 5 HOUSES 5 HOUSES 599.26 m 599.26 m 5 HOUSES Description 599.26 m Flow direction 599.26 m Drain Over head tank 5 HOUSES599.26 m 599.26 m Transformer 5 HOUSES 599.26 m Electric pole Hand pump 5 HOUSES Borewell 5 HOUSES 599.26 m Cross drainage 5 HOUSES Temple Cistern 599.26 m Maszid House 599.26 m 5 HOUSES 599.26 m 599.26 m 599.26 m 5 HOUSES 599.26 m 5 HOUSES 5 HOUSES 599.26 m 599.26 m SECTION OFFICER ASSISTANT EXECUTIVE ENGINEER
KADAJJI VILLAGE N WE SW NW NE SE S SL DESCRIPTION REVISION BY DATE RELEASED NO FOR 1 INFORMATION CLIENT: FEASIBILITY 595.36 m DPR 594.32 m Agricultural TENDER Tarining Pond Center CONSTRUCTION 596.12 m 596.12 m 597.85 m 5 HOUSES Kadajji Gram Panchayat 597.95 m 5 HOUSES 597.93 m 598.01 m 597.90 m 5 HOUSES 598.12 m 5 HOUSES 598.10 m RDWS & S GOVERNAMENT 598.05m OF KARNATAKA 598.92 m D P R CONSULTANT: 5 HOUSES ..\\..\\..\\desktop\\grey water model dpr\\transperent logo.png 598.45 m Vidwan Ventures Engineering Consultants 5 HOUSES House no #03 Manmathnal, Hunagund Taluk, 5 HOUSES 598.10 m Bagalkot District, 587118 +918050128708, 3m 597.01 m 597.99 m www.vidwanventures.com, [email protected] 5 HOUSES 598.12 m PROJECT: 5 HOUSES Grey Water Management for Kadajji Village in Kadajji Gram Panchayat in 598.10 m Davanagere District m 598.12m OUSES 5 HOUSES HOUSES 598.05 m 5 HOUSES DRAWN REVISION: BY: JOB NO: SHEET: DESIGNED BY: CHECKED BY: WORK NAME: Govt High School Grey Water Management for Kadajji Village in Kadajji Gram Panchayat in VILLAGE DETAILS Davanagere District Total length of CC drain 4325.2m TITLE: Total Length of Earthen drain 595.1m LAYOUT OF KADAJJI VILLAGE Toatal length of all drains 4920.3m Total no of Community soak 34 No's pits provided 20 No of houses connected to 3850.0m each soak pit Capacity of each Soak pit EXECUTIVE ENGINEER SCALE: DRAWING NO: 1
Detailed Project Report for Greywater Management in Kadajji village Kadajji . G.P. Davanagere District Prepared by- Vidwan Ventures Engineering Consultants
Detailed Project Report for Greywater Management in Kadajji village Kadajji G.P. Davanagere District Sl. No. Particulars Amount Part -A 5622243.00 5622243.00 1 Individual Soak Pit (406 No's) 674669.16 Total 562224.3 0 GST @12% on Total 6859136.46 Contaigencies and Other Charges 10% 68.59 Non-SOR Items (Inclusive of GST) Grand Total In lakhs In words: Sixty Eight Lakhs Fifty Nine Thousands Only Assistant Executive Engineer Executive Engineer
DETAILED ESTIMATE FOR COMMUNITY SOAK PIT Sl. Description of Item Unit No L B D Qty Rate Amount No. (Rs) (Rs) 1 Earthwork in surface excavation in ordinary soil for levelling and lowering the ground manually (other than foundation of buildings, culverts, road drains and trenches of pipe lines and cables) and removing the excavated stuff to a distance not exceeding 50m and lift upto 1.5m, excavated surface levelled and neatly dressed, disposed earth to be levelled after breaking of clods and neatly dressed as per specifications. Specification No KBS 2.1(a)/2.3.1 (RDW&S BGV Circle, SR 2019-20, P.No - 8, I.No - 2.01) For foundation Soak pit CUM 1 1.13 1.65 1.87 1.87 Total 249.00 464.72 0.2 6187.00 1237.40 2 Providing and constructing burnt brick masonry for basement 0.20 1573.00 6292.00 and superstructure with approved quality of non-modular 4.00 840.77 bricks of standard size of class designation 3.5 Newton per sqmm with cement mortar 1:6 including cost of materials, labour charges, scaffolding, curing complete as per specifications. Specification No. KBS 6.2 (RDW&S BGV Circle, SR 2019-20, P.No - 43, I.No - 5.09) Silt trap CUM 1 4 0.1 0.5 Total 3 Supplying & errection of RCC rings for well steining of 0.3 Mtr Depth using M-20 grade concrete using clean graded granite or trap or jelly of approved quality 20mm and down size well compacted including centering, formwork and plastering for both faces with C.M 1:3 proportion as per design using 6.50mm M.S. coil at the rate of 10 Kgs/ring including cost of steel and fabrication, bailing out of water, errection etc., complete. (RDW&S BGV Circle, SR 2019-20, P.No -115, I.No - 11.20.1) For 1.80m dia (clear) rings of steining EACH 4 thickness 0.075mm upto 18 M depth 4 Providing and filling with boulders or rubble of approved size and quality, including hand packing, wedging, filling in voids with quarry spalls and clean sand etc., complete with all lead and lifts, etc., complete (RDW&S BGV Circle, SR 2019-20, P.No -115, I.No - 11.211) Boulders filling CUM 1 3.73 0.15 1.4 0.78 1074.00 Vidwan Ventures Engineering Cosnsultants
Sl. Description of Item Unit No L B D Qty Rate Amount No. (Rs) (Rs) 5 Good quality well burnt charcoal for grounding purpose packed in a non returnable gunny bags of 30 kg each (RDW&S BGV Circle, SR 2019-20, P.No -LX, I.No - 11.211) Charcoal filling BAGS 3 3.00 600.00 1800.00 1.00 2118.64 2118.64 6 C.I manhole cover with frame 610x455mm size (38 Kgs) (RDW&S BGV Circle, SR 2019-20, P.No -XLIV, I.No - 1048) Mnahole cover EACH 1 7 Providing and laying Reinforced cement concrete of mix design of M-20 Grade with cement @ 320 kg, 20mm and graded granite or trap or basalt jelly of approved quality @ 0.69 cum and fine aggregates @ 0.46 cum, super plasticiser @ 3lts confirming to IS-9103-1999 reaffirmed 2008 machine mixing,laid in layers of not more than 15 cms thick, well consolidated including centering, formwork, vibrating, curing, smooth finishing to the required plumb and face in C.M.1:3 proportion wherever necessary as per design and specifications etc., complete for RCC roof slab,top dome,ring beam of all spans (exclusive cost of steel and fabrication charges) (RDW&S BGV Circle, SR 2019-20, P.No - 111, I.No - 11.08) For Soak pit CUM 1 1.13 0.1 0.11 Total 0.11 9675.00 1094.36 Total 13847.89 For 406 5622243.00 Soak pit Section officer Assistant Executive Engineer Vidwan Ventures Engineering Cosnsultants
Detailed Project Report for Greywater Management in Kadajji village Kadajji . G.P. Davanagere District Annexure 2- Community Soak Pit Prepared by- Vidwan Ventures Engineering Consultants 33 | P a g e
Detailed Project Report for Greywater Management in Kadajji village Kadajji . G.P. Davanagere District Community Soak pits A soak pit, also known as a soak away or leach pit, is a covered, porous-walled chamber that allows water to slowly soak into the ground. A soak pit can also be used to dispose of the effluent from a septic tank. Pre-settled effluent from a Collection and Storage/Treatment or (Semi-) Centralized Treatment technology is discharged to the underground chamber from which it infiltrates into the surrounding soil. As greywater percolates through the soil from the soak pit, small particles are filtered out by the soil matrix and organics are digested by microorganisms. Thus, soak pits are best suited for soil with good absorptive properties; clay, hard packed or rocky soil is not appropriate. However, soak pits are easy and relatively quick to construct; and can be used on plain areas. Performance of soak pit depends on the permeability of soil. Pores of soil may get clogged with time and this can reduce the percolation capacity of a particular soak pit. Seasonal variations in the water table can also affect the performance greatly and a soak pit performs better in dry season. Merits: Low cost and easy to construct Dry environment: the entire wastewater from a household is absorbed by this underground structure. This results in dry premises; Freedom from the mosquito nuisance; and Odour-free environment; No drains required; Recharge of ground water: the wastewater enters the natural ecosystem and finally reaches to the ground water stream thus recharging the ground water source; and O&M costs are low and borne by individual. Demerits One of the demerits is possibility of ground water contamination if grey water is contaminated with faecal substance especially in the areas with high groundwater table. Prepared by- Vidwan Ventures Engineering Consultants 34 | P a g e
Detailed Project Report for Greywater Management in Kadajji village Kadajji . G.P. Davanagere District Prepared by- Vidwan Ventures Engineering Consultants
Design of Community Soak Pit Total Households in Kadajji village 676 Population in Kadajji village 3205 Population for next 30 years 4692 Number of population per house Number of households connected with each soak 5 Number of soak pits to be provided 20 34 Design of one community soak pit Particulars Quantity Units No. of Houses Water Supply 20 No Population for Each House Total Population 55 LPCD Qunatity of watersupply Perculation Rate 5 No Percentage of Greywater Quantity of Greywater 100 No Area of Perculation 5500 L/D Diameter of Soak Pit Depth of Soak Pit 3 Minutes Free board Total depth 70 % Area required for one soak pit Number of soak pits 3850.00 L/D Total area required for all soak pits 32.63 m² 33 m² 2.5 m 3.6 m 0.3 m 3.9 m 4.91 m² 28 Nos 137.46 m² 1.36 Gunta 1479.63 ft² Silt trap 0.9m x 0.9m Size of silt trap 0.6 m Depth of chamber 0.1 m Wall thickness 1.3 m Width of Footing 0.1 m Depth of Footing
Detailed Project Report for Greywater Management in Kadajji village Kadajji . G.P. Davanagere District Prepared by- Vidwan Ventures Engineering Consultants
Schematic Drawing of Silt Trap SCHEMATIC RCC Slab 1:3:6 G 0.10 L 4.00 4.15 G Outlet @ 100mmØ 4.45 BBM WALL @1:3 0.60 A CC Bed 1:3:6 0.10 0.10 1.30 C/S of Silt Trap 1.30 1.10 0.90 1.30 1.10 0.90 Silt trap 0.9m X 0.9m Plan SECTION OFFICER ASSISTANT EXECUTIVE ENGINEER
KADAJJI VILLAGE N C DRAWING OF COMMUNITY SOAK PIT NW NE SE E MANHOLE @0.6m Ø W L COVERING RCC SLAB SW @0.125m THICK 0.60 S SL DESCRIPTION REVISION BY DATE RELEASED NO FOR 1 KADAJJI VILLAGE GREY WATER MANAGEMENT INFORMATION FEASIBILITY PROJECT. DPR TENDER CONSTRUCTION CLIENT: 3.9 BOULDER FILLING RDW & S GOVERNAMENT 2.50 @0.3m THICK OF KARNATAKA SAND FILLING D P R CONSULTANT: @ 0.15m THICK CHARCOAL FILLING @0.1m THICK RCC RING @0.05m THICK 2.80 Vidwan Ventures Engineering Consultants 2.90 House no #03 Manmathnal, Hunagund Taluk, 3.50 Bagalkot District, 587118 Section @ AA +918050128708, Ø2.50 www.vidwanventures.com, [email protected] Ø2.60 PROJECT: Ø2.80 Ø2.90 KADAJJI VILLAGE GREY WATER MANAGEMENT Ø3.50 PROJECT. DRAWN ABHISHEK BY: NALATAWADA REVISION: Ø0.60 A DESIGNED ABHISHEK JOB NO: BY: NALATAWADA CHECKED SHEET: BY: WORK NAME: STRUCTURAL DRAWING OF COMMUNITY SOAK PIT Plan TITLE: EXECUTIVE ENGINEER COMMUNITY SOAK PIT SCALE: 1:62 DRAWING NO:
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