Waste waste waste ! In today?s world every one generates something and that is waste . Every country?s problem is waste .The waste is using by  many countries wisely.  In India , initiative started to utilize waste in big way more or less in every state.

 

 

In  Gujarat such  projects  were started 50 cities to generate power  from waste. In Maharatra around 47 such projects are in process. The solid waste generated at domestic level is the single largest component of all wastes generated in our country. A number of research studies have shown that somewhere 300 to 600 gm of solid waste is generated per person per day in our country.

 

Eventually, Municipalities everywhere face the problems of waste collection, processing and disposal or treatment of voluminous solid waste produced by the cities. Moreover, the rains and humidity on the garbage promotes the bacterial multiplication and enhances the spread of infectious diseases. Due to their rich organic contents , the solid waste can be a good resource to produce manure & energy. It has been estimated that about 70 MW equivalent power could be generated from urban & municipal waste alone. This potential is likely to increase further with our economic growth.

 

In order to recover energy from municipal solid waste (MSW) and liquid waste (MLW) , Gujarat Energy Development Agency (GEDA) Vadodara , had carried out the Prefeasibility

Studies in total seven cities ( i.e. Ahmedabad , Bhavnagar , Vadodara , Rajkot , Bhuj , Bharuch & Valsad ) under ?National Programme on ?Energy Recovery From Urban, Municipal & Industrial Wastes? launched by Ministry of Non Conventional Energy Sources (MNES) Govt. of India.

 

GEDA has implemented two project under MNES Waste to Energy (WTE) scheme

Energy ?National policy on Energy Recovery from Urban , Municipal & industrial

Wastes? and one project has been recently sanctioned to SMC by MNES . The details of

respective projects is here as under :

1) 2.0 MW capacity Bio-gas based Power Generation Project at M/S

Kanoria Chemicals Industries Ltd. , Ankleshwar.

This project was commissioned during November (5.11.98 ) 1997-98 financial

year under MNES capital investment subsidy scheme on WTE projects.

The distillery having capacity of 55KLPD is generating about 675 M3/day spent

wash per day . this spent wash is being treated in 2no. Anaerobic Digesters for

Bio-methanation. Approximately 21000 to 24000 nm3 /day Bio-gas (containing

60 – 62 % Methane) is produced daily. The produced gas is further treated for

H2S removal and clean gas is supplied to 2MW Power Plant consisting of 2 no.

generators of 1.003 MW each. The Power plant is connected to existing

Electrical Power Supply System.

In order to have maximum benefits the Waste Heat Recovery System ( W.H.R.U.)

has also been installed and about 1700 Kg/hr (at 10Kg/Cm2 pressure ) steam

generation takes place daily.

Further , The biological sludge /slurry from distillery ETP is piped to ETP sludge

receiving tank and after de watering mixing with press mud is transformed into

Bio-Compost Windrows for 30-45 days to get Bio-Fertiliser.

The Power plant is working since on average 68.5 to 72.3 PLF having average

monthly generation of 1005000 units.

 

 

2) Industrial Waste based 4800nm3/day capacity Bio-methanation

Project at M/s Anil Starch Products Ltd., Ahmedabad.

An Up Flow Anaerobic Sludge Blanket technology reactor (UASB) having total

bio-gas generation capacity of 4800 nm3/day has been installed at M/s Anil

Starch Products Ltd. Under Waste to Energy project related interest subsidy

scheme of MNES for WTE projects during financial year 2000-2001.

The project was initially completed & commissioned in April?2001, however gas

generation was not up to the mark because of various teething problems , it

picked up during month of August? 2001 when it reached to its design level .

On average about 4300- 4400 nm3/day bio-gas generation is taking place

which is used in the boilers.

Having this bio-gas unit monthly savings of about Rs. 7.40 lacs ( earlier used to

be incurred on coal electricity & lime for starch waste treatment ) on average

is achieved by M/s ASPL .

 

3) Bio-gas based 0. 5 MW capacity Power Plant at Sewage

Treatment Plant – ANJANA site , Surat Municipal Corporation,

Surat.

MNES has sanctioned 0.5 MW capacity bio-gas based power generation Project

under UNDP/GEF assisted Project on ?Development of High Rate Biomethanation

Processes for Reducing Green House Gases Emmission? . The

project was sanctioned by MNES to SMC at the total outlay of Rs. 161.955 lacs

on 50% cost sharing basis by MNES. vide its sanctioned no. PMC/182-97/ SMC

dated 21st July, 2002.

To monitor the implementation of the project a Project Implementation

Committee (PIC) has been constituted comprising of representatives of SMC,

GEDA & MNES .

4) Industrial effluent based based 5500 nm3/day capacity Biomethanation

Project at M/s Riddhi Siddhi Gluco Biols Ltd.,

Viramgam , Ahmedabad.

MNRE sanctioned a 5500 nm3 /day capacity bio-methanation project in year

2007-08. The project has been completed & commissioned in February?2008. The

UASB reactor designed for 5500 nm3 is working on 90 % efficieny. The COD

reduction is seen about more than 95%. On average 6100 nm3 gas is daily

generated and used in the coal fired boiler , resulting to coal saving /day about 5.0

Ton .

5) Bio-gas based 0. 975 MW capacity Power Plant at Ms. Sayaji

Industries , Maize Products , Ahemedabad.

About 14000 nm3/day biogas is generated in the Industry as result of Biomethanationo

of Industrial waste through existing UASB reactors. Approx. 20-

25% biogas quantity was being used for running their drier for gluten product and

remaining biogas was flared. Based on surplus biogas (approx.12000nm3/day)

1MW capacity biogas based power plant was sanctioned by MNRE under its

Biogas to Power head. The project commissioned in June?2009.

6) Industrial effluent based based 12000 nm3/day capacity Biomethanation

Project at M/s Riddhi Siddhi Gluco Biols Ltd.,

Viramgam , Ahmedabad.

The project has been sanctioned by MNRE under its programme on Energy

Recovery from Industrial & Commercial effluent /waste. Basic objective of

objective was to support their Coal based Co-gen power plant. The project has

been commissioned in Jan?2010 and approximately 700-720 Ton coal (worth of Rs. 21.60 lacs) is saved monthly by means of biogas supply to coal fired boilers