The first BIOTECH Waste to electricity project installed in Tamil Nadu.


BIOTECH has designed and installed a compact and pre fabricated Bio waste to Electricity plant at Sri Sankar Nagar, Pammal, Chennai, the Capital of Tamil Nadu, India. This plant has been installed in association with Exnora Green Pummal, a well known NGO actively involved in waste management projects for the last several years. The cost of the project amounted to Rs. 25 lakhs after subsidy. The fund for the purpose was raised by Exnora Green Pummal from different donors.
This plant is capable of treating 250 Kg. of organic waste every day. Bio methanization technology is applied for this process. 25-30 Cum Biogas is being generated every day. This gas is utilized for power generation. 5 KW of electricity is generated every day. It is used for meeting the in-house requirement for the project and for street lighting. 50 N0s. of Compact Fluorescent Lamps (CFL) have been installed nearby the streets and these are working with green electricity.

The speciality of this plant is that it is totally a pre-fabricated one, made of Fiber Glass Reinforced Plastic (FRP). The system is equipped with three anaerobic pre-digesters and three Modified Up-flow Anaerobic Sludge Bed (MUASB) reactors connected in series. The treated liquid that comes out from the plant is utilized as fertilizer and a part of this treated slurry is re used for the operation of the plant with the help of an inbuilt slurry loop system. The Biogas generated from the pre-digesters and digesters are passed through a non return unit and collected in a centralized synthetic gas collector. This gas is passed through a gas scrubber and after scrubbing it is used as fuel in a 100% Biogas engine for the generation of electricity, 5 KW electricity is generated every day. It is used for meeting the in-house requirement of the project and also for street lighting.

The main advantage of the prefabricated system is the saving of space and time required for the installation. Without much expense all parts of the plant can be shifted from one place to other if necessary. It is maintenance free and uses only minimum moving parts. The recovery of treated solid manure can be removed from the pre-digester. Through the introduction of pre-digesters, there is no chance for formation of scum in the digesters. The expected life of the plant is between 10-15 years. Environmental benefits derived through the installation of the plant is equivalent to the emission reduction of more than 100 metric tones of CO2 every year.

This type of decentralized waste treatment system helps the community to participate in climate protection activities. To achieve this goal BIOTECH is trying our level best.

Location of the project
Sri Sankar Nagar, Pammal, Chennai – 75, Tamilnadu state, India
Distance from the Chennai International Airport – 4 Km.
Project promoted by – Exnora Green Pummal
Main Sponsor – Sam Foundation for Eco Friendly Environment.
Technical Details of Waste to Electricity ptoject

Treatment Capacity of the Plant 250 Kg. of Organic Waste
Type of feed materials All degradable materials like cooked food waste, vegetable, fruits, fish and meat waste
No. of Anaerobic Pre-digesters 3 Nos
Volume of each Pre-digesters 3,500 litters
No. of Digesters 3 Nos
Volume of digesters 20,000 litters
Gas generation per day 25 – 30 Cum
Use of gas Electricity Generation
Generator (100% biogas model) 5 KW
Stand by generator (Duel Fuel model) 3 KW
Organic fertilizer output per day Liquid Fertilizer – 250 litter Solid Fertilizer – 25 Kg.
Electricity Generation 5 KW
Number of hours 7 Hrs. Day time 3 Hrs., Evening – 6 pm to 10 pm
Number of lights installed 50 Nos. of 11 W CFL
In-house requirement of electricity For the operation of pump in slurry loop system, pump in Gas scrubber, gas pump, de-humidifier etc.
Manpower required for the operation of plant One operator + One part time supervisor
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BIOTECH Waste to electricity plant installed at Narikkuni


“Electricity from waste is wonderful. This is an Occasion for pride and joy for the people of Narikkuni Panchayath” – Says Shri. Ramachandran Kadannappally, Hon. Minister for Devaswom, Kerala State.
Waste treatment is one of the complex problems confronted by human beings these days, in the cities as well as in villages. It is quite necessary to take adequate measures to treat the wastes accumulating day by day in Kerala where the density of population is very high. In this situation the service of BIOTECH in producing electricity also along with the treatment of waste, with application of scientific technologies by convincing the people, according to the opinion of the Hon. Minister for Devaswom Shri,Ramachandran Kadannappally is wonderful. The Minister was making out this observation while inaugurating the waste treatment electricity generation plant installed in the Narikkuni Grama Panchayath, in Kozhikode District on 21st May 2010. According to him the people of the Narikkuni Panchayath can be proud of having this plant as one of the valuable achievements of the people.
The process of generating electricity by making use of the biogas produced with the eco-friendly treatment of waste is worth to be appreciated. The laws and regulations enacted against the tendency of throwing away the waste, in public places with objective of protecting the environment and ensuring the public heath were of immense help to the people. It was only on account of these stringent measures that the waste management problem that was created in Sabarimala where nearly 4 crores of devotees assembled for worship during the last year could be solved to a considerable extent. The co-operation of the people is very essential for making such attempts effective and successful. The Minister has therefore sought the whole hearted support and co-operation of the people for successfully implementing similar people friendly schemes.

In the inaugural meeting presided over by the Koduvally MLA Adv. P.T.A. Rahim, Smt.M.P. Rukia Teacher, the Narikuni Panchayath President, welcomed the gathering. The detailed project was explained by
Dr. A. Sajidas, Director, BIOTECH. He has stressed the need for observing strictly the rules for the proper maintenance of the plant for running it efficiently. He had also sought the co-operation and support of the public and traders in the area. He reminded the people to restrict the deposit of waste in the plant in accordance with the limit prescribed.

The project was finalized jointly by the Narikkuni Grama Panchayath and the BIOTECH. The construction of the waste treatment electricity generation plant adjacent to the Village Office by the side of the Narikkuni Market was completed by BIOTECH by harnessing different modern technologies. In the present context, when waste is becoming a real threat to human beings and the environment, BIOTECH had come up as a model, by the installation and operation of the waste treatment plants very efficiently in about 50 places in the State, which are very crowded and thickly populated.

This plant is capable of treating 300 Kg. of easily decaying wastes in an eco-friendly manner and for generating 5 KV electricity. The Electricity is presently used for lighting 50 CF Lamps around the premises of the plant. Even now sufficient quantity of electricity for lighting about 100 additional CF lamps, can be generated from the plant.

The plant is designed in such a way that the waste treatment process as well as the generation of electricity can be viewed by the public. BIOTECH an N.G.O at Trivandrum is implementing different projects of the Central Ministry of Non-Conventional Energy. This organization is providing subsidy also for the beneficiaries of the plants generating electricity by the treatment of bio wastes. Such waste treatment plants are also being installed by BIOTECH with the co-operation and support of the Local Self Govt. Agencies.