Intensive Biochemical Processes of Wastewater Treatment With High Caloricity Biogas Production

Anaerobic digestion of organic substrates in wastewaters from agro-industrial sector can be efficient method to reduce the pollutant contents, and also a source of biogas. The research is focused on developing of intensified biogas technology and integrated equipment, based on a series of original approaches. New types of new phyto-catalysts of methanogenic digestion were proposed: aescinum, squalene, and betulinol, introduced in the digested biomass in micro-concentrations of 10-3-10-5%. The proposed substances promote about 1.5-2 times acceleration of methanogenic process and increase biomethane contents in biogas close to the natural gas level – up to 93-97%. As a feedstock for biochemical digestion, post-distillery vinasse in mixture with farmyard manure was used. By combining of biochemical treatment with microfiltration an advanced treatment degree was reached, reducing COD from 28530 mg O2/L to 187 mg O2/L. In bioreactor proposed, biomass using coefficient reaches 85-93%, as compared to 60% in the conventional biogas processes.

Mutual Symbiotic Methanogenic Process between Acetotrophic and Hydrogenotrophic Methanogens during Anaerobic Digestion

Methaogens performing the final step in the anaerobic conversion of biomass to methane are members of the domain Archaea, which synthesis methane as the major product of their energy metabolism. Both acetotrophic and hydrogenotrophic methanogens are essential for the key step of methanogenesis.