FAQs

The biogas is a renewable energy that can be used for heating, electricity, and many other operations that use a reciprocating internal combustion engine, such as GE Jenbacher or Caterpillar gas engines. To provide these internal combustion engines with biogas having ample gas pressure to optimize combustion, within the European Union ATEX centrifugal fan units built in accordance with the European directive 2014/34/EU (previously 94/9/EG) are obligatory. These centrifugal fan units, for example Combimac, Meidinger AG or Witt & Sohn AG are suitable for use in Zone 1 and 2 .

Other internal combustion engines such as gas turbines are suitable for the conversion of biogas into both electricity and heat. The digestate is the remaining inorganic matter that was not transformed into biogas. It can be used as an agricultural fertiliser.

What is biogas? - Biogas is a byproduct of the decomposition of organic matter by anaerobic bacteria. Biogas is typically composed of 60% methane and 40% CO2. It is similar to natural gas which is composed of 99% methane. Biogas is a clean and renewable energy that may be substituted to natural gas to cook, to produce vapor, hot water or to generate electricity. This is one of green house gas that UN has been identified. Try it now!
How does it work? - Organic waste is put into a sealed tank called a digester (or bioreactor) where it is heated and agitated.You have to insert organic waste with water with 1:1 ratio. In the absence of oxygen anaerobic bacteria consume the organic matter to multiply and produce biogas. Try it now!
What type of waste produces biogas? - Any organic waste has the ability to produce biogas: human excreta, manure, animal slurry, fruit and vegetable waste, slaughterhouse waste, meat packing waste, dairy factory waste, brewery and distillery waste, and etc .Fiber rich wastes like wood, leaves, etc. make poor feedstock for digesters as they are difficult to digest. Try it now!

How much biogas can I get out of my waste? - The amount of biogas you can extract from your organic waste depends on the waste itself and the design of the digester system. Some digesters can yield 20 m3 of biogas per tone of waste while others can yield as much as 800 m3 per tone. It all depends on waste quality, digester design and proper operation of the system. Try it now!
Where is biogas produced? - Biogas is normally produced in nature by the anaerobic degradation of organic waste in soil, marshes, ocean, etc. Biogas is also produced in landfills where organic food waste degrades in anaerobic conditions. Biogas can be produced in anaerobic digesters. These are equipment (tanks) providing full control of the process and ensuring full biogas recovery. Try it now!
Since methane is a potent greenhouse gas, isn’t it stupid to produce biogas? - Methane has a greenhouse gas (GHG) heating factor 21 times higher than CO2.Combustion of biogas converts methane into CO2 and reduces the GHG impact by over 20 times. By extracting methane out of waste and using it to produce heat and/or electricity we ensure that the waste will not degrade in an open environment therefore reducing direct methane atmospheric emissions. Moreover, the energy provided by the biogas is likely to displace fossil fuel which is the main contributor to GHG emissions. Biogas energy is considered carbon neutral, since carbon emitted by its combustion comes from carbon fixed by plants (natural carbon cycle). Try it now!

How much energy is in biogas? - Each cubic meter (m3) of biogas contains the equivalent of 6 kWh of calorific energy. However, when we convert biogas to electricity, in a biogas powered electric generator, we get about 2 kWh of useable electricity, and the rest turns into heat which can also be used for heating applications. 2 kWh is enough energy to power a 100 W light bulb for 20 hours or a 2000W hair dryer for 1 hour. Try it now!
What happens to the waste after digestion? - Despite popular belief, the amount of waste going in the digester is almost equal to the amount coming out. However the quality of the waste is altered for the better (less odor, better fertilizer, organic load reduced, less polluting). Waste coming out of the digester can be separated (solid/liquid): the solid part can be composted and the liquid part can be used as liquid fertilizer or can be treated further and disposed. Try it now!
So why make biogas? - It always costs money to get rid of waste. If it doesn’t cost you anything, you are probably creating an environmental hazard. By putting a digester in your waste treatment chain you introduce a potential revenue center. Try it now!

For example:

On a farm the manure is not considered to be a waste but a fertilizer. By installing a digester the farmer can profit from the biogas by reducing odors and enhancing the fertilizing value of the manure. In an agro-food industry the digester can be used as a primary waste treatment unit where the biogas is used to offset some energy cost in the plant and to reduce the size of the secondary waste treatment.

The program has been design for solve the energy problem and waste problem of many sectors in Sri Lanka as follows :
Domestic Level
Community Level
Hotels
Hospitals
Forces Camps
Government Institutions
Religious Places
Prisons
Factories
Training Centers

Significances of biogas plants - Able to implement proper waste management system /Decrease methane gas emission to air / Decrease the environment pollution / Decrease the diseases which began from the waste / Decrease the LP gas usage & use environmentally friendly energy / Able to get good & effective organic fertilizer & use to cultivation / Help to decrease global warming / Easy to use & no threat about highly flammable / Able to get maximum result from the waste / Able to generate electricity from the biogas Try it now!
Where we can install biogas units - To manage domestic waste, kitchen waste, waste water / To manage animal husbandry waste / To manage waste in hotels / To manage bakery & vegetable market waste / To manage fish market waste / To manage urban waste / To manage toilet waste Try it now!

How Can You Help?

Individuals

If you would like to start telling your friends , please contact our team helpoecogreen@sltnet.lk to get started.

Students, Teachers, and Schools, Volunteer programs

If you would like to organize a educational program through your school, please write us Helpo Eco Green, Samagi Watta Mw, Dangedara, Galle, Sri Lanka