A PRESENTATION

ONDECENTRALISED TREATMENT OF

WASTE WATERA remedy and solution for urban and rural localities

In the expert guidance of:SRIDHAR PABBARAJUChief operating officerIntergen energy pvt, ltd Gurgaon

Under the supervision of :Dr.RICHA K.TYAGIAssistant professor BBA Central University -Lucknow

Work carried by :RAJNEESH KUMAR GAUTAMM-Tech Energy and EnvironmentBBA Central University -Lucknow

CONTENTS

1.Introduction

2.Objective

3.Proposed work

4.Targets achieved

5.Expected outcome

6.Conclusion

INTRODUCTIONThe need of water is directly proportional to the population, as there is exponential growth in population in city like Delhi the need of water is also becoming a serious concern . To meet the Demand there must be some initiative to be taken as the available water is limited and the exploitation of water is increasing day by day.

Though the water use can be controlled to a some extent but for city with exponential growth rate it is not feasible as large quantity of water is required for variety of works viz. domestic, commercial, industrial ,institutional etc.

The concept of water reuse and recycle may be a solution for such problem. It is calculated by CPHEEO that 80% of water turns as waste water. It this waste water can be recycled and reused then it can be used for various purposes like-

1.) Toilet flushing

2.) Car washing

3.)Can be used in chillers where huge amount of water is required

4.) Gardening

5.) Fishing

6.) Horticulture

As using the decentralized waste water treatment facilities not only recycle and reuse the waste water but also prevent the freshly available ground water.

OBJECTIVES1.) To study the status of current sewage treatment status of Delhi based NCR region and estimating the quantity of sewage discharged into Yamuna.

2.) Projection of the current population and calculating the water demand and supply deficit, thereby calculating the sewage generation over an projected period of 10 years from present i.e. 2025

3.) Designing of decentralized waste water treatment plants that can be adopted by communities in order to prevent the over-exploitation of the ground water and providing a efficient sewage treatment facility.

CALCULATION OF SEWERAGE AND WATER AVAILABILITY FROM 2004-2025

ALL VOL IN MLD

2004 2005 2006 2011 2015 2021 2025

population 16753235 18300000 23000000 28600000

Total water demand

2685 3763 4090 5181 5436 6275 7014Total net water supply

2265 2362 2461 3773 3696 5259 6312Waste water generated

2148 3010 3272 4144 4348 5017 5611Waste water treated at CETP

200 217 234 346 649 755 ------

Proportion not sewered

14% 13% 13% 10% 5% 5% 5%Outside sewered area

254 302 302 294 281 ------Net w.w generated

1358 1722 1798 2218 3201 3242 ------

infiltration 518 518 518 518 518 518 518Gross w.w to treatment

1876 2240 2316 2376 3719 3760 4500apx

2001 (138.51 Lakhs) 2011 (167.53 Lakhs)

EXPECTED POPULATION TO REACH BY (190 LAKHS) BY 2017

EXPECTED POPULATION INCREASE BY 24 Million BY 2021 (U.N)

PROJECTED POPULATION FOR 2025 (28.6 Million)

(NOTE: THE POPULATION HAS BEEN PROJECTED BY VARIOUS METHODS PRESCRIBED BY CPHEEO MANUAL)

POPULATION PROJECTION FOR 2025

EXPECTED OUTCOMEThe current status of the sewerage system has been studied and analyzed. The population has been projected for a period of 10 years i.e. 2025. The sewage treatment in Delhi is not up to the mark as the total sewage treatment is found to be 57% only and the rest of the sewage is dumped into Yamuna by partial treatment or without any treatment .

Various methods are implemented for calculating and modeling of population like mathematical method and software’s like PDE population module has been used.

The objectives are been carried under the supervision of the experts in the field of the sewage treatment and various public agencies like Delhi jal board and Centre for Science and Environment are helpful for the fulfillment of the objectives prescribed.

The designing of the decentralized sewage treatment system require low energy ,low cost and less skilled techniques and is suitable for any community, industry and institution. This objective will be completed by may of 2015.

CONCLUSIONIn India 38255 MLD of sewage is generated out of which the capacity of treatment is 11788 MLD, out of the treatment capacity the actual treatment is only 22% (8251) and the rest about 70% of the sewage is dumped directly in the river bodies without treatment or after partial treatment. If the government built STP for 70% of the sewage generated it would cost around 26500-105868 Crore Rs (Excreta matters 2012). It is therefore not feasible to invest such huge amount of money as the centralized plants needs to be connected by Sewer lines which is again very much costly. The concept of RECYCLE AND REUSE can be implemented by decentralized plants which are cheap, cost effective and easy in construction in least available resources and having high efficiency of treatment.

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