Intensive Biochemical Processes of Wastewater Treatment With High Caloricity Biogas Production

Abstract

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.