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Intensive Biochemical Processes of Wastewater Treatment With High Caloricity Biogas Production
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Author(s): Gheorghe Duca (Institute of Chemistry, Moldova State University, Moldova), Victor Covaliov (Moldova State University, Moldova)and Olga Covaliova (Institute of Chemistry, Moldova)
Copyright: 2020
Pages: 16
Source title:
Handbook of Research on Emerging Developments and Environmental Impacts of Ecological Chemistry
Source Author(s)/Editor(s): Gheorghe Duca (Institute of Chemistry, Moldova State University, Moldova & Academy of Science of Moldova and Romanian Academy, Romania.)and Ashok Vaseashta (International Clean Water Institute, USA & New Jersey City University, USA & Academy of Sciences of Moldova, Moldova)
DOI: 10.4018/978-1-7998-1241-8.ch013
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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.
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