Operation principles

The base of any microorganism physiologic function is constant metabolism that includes processes of assimilation and dissimilation, nutrition and excretion. In favorable environment metabolism flows very intensively: microorganism cell can consume big amounts of food, sometimes 30-40 times more than microorganism weight. Technology of anaerobic digestion is based on a process of gradual oxidation of carbonaceous compounds performed by different groups of anaerobic microorganisms.

During the process of recycling of organic substrates in biological reactors artificial ecosystems are created and supported in order to perform most efficient conversion of organics into biogas. Due to the high concentrations and constant feeding of organics, constant and even mixing, support of constant temperature inside the digester microorganisms have ability for quick consumption and conversion of organic substances. Such conditions cause massive development of all types of anaerobic organisms participating in the chain of biomass destruction including methanogen bacteria. Minor inclusions of oxygen that comes with fresh material into the digester are effectively used by aerobic bacteria and facultative anaerobic bacteria. In order to reach quick conversion of complex organic compounds (in fresh material) into methane technological process ensures as much as possible high bacterial number inside the digester. Concentration of bacteria inside digester reaches 5,2–6,8×1010 cell./g, 2,5×1011 cell./г, 1×105–1×1010 cell./ml.

In general technological systems of biogas plant automatically control and direct all systems to support all vital parameters for anaerobic digestion of organic materials (temperature, pH, substrate dosing, mixing). Produced biogas is collected to gas holders and after some conditioning is used as fuel for gas engine that moves electric generator and produces electric and heat power.