annexures - Indian Institute of Technology Roorkee

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Guidelines for preparation of reports Under NRCP / NGRBA4.13 SEWAGE TREATMENT PLANTS4.13.1 TechnologyIn the NRCD document “Compendium of Sewage Treatment Technologies” published in 2009,(http://moef.nic.in/modules/recent-initiatives/NGRBA/Final%20Compendium.pdf)technologies have been evaluated on basis ofi. Performance,ii. Energy requirement,iii. Resource requirements and associated costs,iv. Land requirements.v. Annualised cost has also been worked out.This compendium may also be referred for selection of an appropriate sewage treatmenttechnology. It implies that depending on the desired water quality of the effluent of the STP,land requirement, availability of electricity and funds available, the technology that appearsfeasible should be selected using the matrix given in Compendium of Technologies. Newtechnologies like 'In Situ Sewage Treatment through Bioremediation' not covered in thecompendium may also be examined.4.13.2 Options for locating STPs(i)(ii)The following options have to be generally considered for locating STPs:(a) One, with a decentralised approach, which would envisage collection, treatment anddisposal of wastewater in the neighborhood itself.(b) The second option involves conveying the collected wastewater to a centralised STPfrom where it could be suitably disposed of into the river or used for irrigation.(c) Locating the STP further away where land at lower rates is available and inexpensivetechnology can be adoptedAll options have to be analysed in the right perspective taking into consideration capitaland recurring costs and views of stakeholders. Proper justification should be presented inthe DPR for the selected option.4.14 WORKING OUT LAND REQUIREMENTSewers are laid on the road side on publicly owned land. Hence no land is required to beacquired for sewers. However, land is required for Intermediate Pumping Stations and SewageTreatment Plants. In the above referred Compendium, the land required for treatment plantshas been given. It should be used to estimate the land required for STPs. For new technologiesnot covered in the compendium, estimate for the land required may be based on STPs actuallyconstructed. Land required for IPS should also be worked out.4.15 RESOURCE RECOVERYWater is scarce. To the extent possible after use it should be reused or recycled to the extent it isfeasible. If it is not feasible other methods of resource recovery arei. Sale of sludge as manureii. Sale of treated water for irrigation, horticulture39
Chapter - 4 Preparation of Feasibility Report of Sewerage Schemesiii. Pisciculture etciv. Generation of electricityv. Carbon credit4.16 SELECTION OF BEST OPTIONThe best option is to be selected as per component wise details of various feasible options.4.17 COST ESTIMATESAt the stage of preparing feasibility report, detailed designing may not be possible for want ofrelevant data. Quotations for supply of bought out items such as STP, pumps and motors, sewerpipes should be obtained from reputed suppliers. The cost of other items as are on the scheduleof rates of the concerned works department of the state should be used to work out cost.Sewage pumping and treatment need uninterrupted electricity supply. Therefore, averageduration of supply of electricity should be ascertained so that the number of hours duringwhich the DG set will need to be operated can be known.4.18 LIFE CYCLE COSTThe most cost effective and feasible option may be selected through their life cycle costanalysis. The cost components that should be included are the following:a) Capital (One time cost)i. Landii. Cost of various components of the system.b) Recurring (Annual)i. Energy (electricity & diesel )ii. Manpower cost in operation and maintenanceiii. Consumablesiv. Repair and maintenancev. Resource recovery (negative cost.)4.19 FACTORS IN SELECTION OF SYSTEM OF WASTE WATER MANAGEMENTFactors which affect the selection of system are given below:i. Feasibility of utilising an existing wastewater management system with necessary repairs,renovation, up gradation and modernisation.ii. Where new systems are to be established, availability of land is a critical factor. In a districtif suitable land of the required size is not available for installing STP, waste water must becarried to a place where land for the STP is available.iii. Availability of electricity. It is crucial as a centralised system usually involves a longinterception sewer necessitating laying of sewers at considerable depth and installation40
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GUIDELINESFOR PREPARATION OF PROJEC
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CHAPTER 15PROJECT IMPLEMENTATION ME
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CHAPTER 17PERFORMANCE MONITORINGThe
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CHAPTER 19COST ESTIMATESEstimation
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CHAPTER 20EXECUTIVE SUMMARY AND CHE
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ANNEXURE-1NATIONAL RIVER CONSERVATI
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ANNEXURE-2BACKGROUNDERNGRBA-ITS OBJ
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ANNEXURE-3Government of IndiaMinist
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ANNEXURE-5ToSir,No.A-12012/2/2010-N
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ANNEXURE-6LIST OF POLLUTED RIVER ST
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ANNEXURE-81. Name of the scheme:2.
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ANNEXURE-11Suggestive Structure of
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annexures - Indian Institute of Technology Roorkee

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