Biogas plants are very efficient at digesting waste. Any other system will consume energy. Biogas plants produce energy.

Aside from the ecology the main benefits are the production of biogas and bio-fertilizers.

Additional benefits: electrical and heat power, bio-methane, savings on capital costs for waste cleaning systems when constructing new facilities.

Biogas production prevents methane emissions into the atmosphere. Its recovery is the best way to reduce global warming.

Biogas plant at Latvian village Vircava

Biogas - gas produced by means of anaerobic digestion of biomass. Microorganisms metabolize carbon from organic substrates in oxygen-free environment (anaerobic). This process is also called rotting or oxygen-free digestion and follows the food chain. Biogas is a gas that consists of approximately 60% methane (CH4) and 40% of carbon dioxide (CO2). Synonyms for biogas are terms like sewer gas, mine gas, marsh gas, and methane gas. Caloric value of biogas ranges between 6000 to 7500 kcal.

Bio-fertilizer efficiency is defined by active substance N-P-K and its biological compound. Biomass at the exit of biogas plant conserves all active substances but now they are in free form. Biological compounds of bio-fertilizes are humic acids and macro elements. Application of bio-fertilizers can increase crop yields up to 30-50%.

Biogas plant at Latvian village Vircava

It is possible to produce 2,4 kWh of electric + 2,8 kWh of heat power from 1m3 of biogas (at 60% methane in biogas). Biogas is used as a fuel in the co-generation plant without any upgrading. There is no need to burn biogas separately to produce heat power. Heat power is recovered from the co-generation plants engine cooling system.

For the purpose of filling gas into vehicles i.e. cars or supplying it into the national gas grid, a system for upgrading biogas to Bio-methane grade must be installed (CO2 removal). After the upgrading process, gas has the quality of natural gas (98-99% methane CH4). The only difference is the source of that gas.

Biogas plant at Latvian village Vircava