Intensification of Energy Production in the Anaerobic Digestion Process of Sewage Sludge Using Enzymatic Disintegration

Bartłomiej Macherzyński (), Elżbieta Popowska-Nowak, Maria Włodarczyk-Makuła (), Beata Bień and Małgorzata Wszelaka-Rylik
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Bartłomiej Macherzyński: Faculty of Biology and Environmental Science, Cardinal Stefan Wyszynski University in Warsaw, Wóycickiego 1/3 Str, 01-938 Warsaw, Poland
Elżbieta Popowska-Nowak: Faculty of Biology and Environmental Science, Cardinal Stefan Wyszynski University in Warsaw, Wóycickiego 1/3 Str, 01-938 Warsaw, Poland
Maria Włodarczyk-Makuła: Faculty of Infrastructure and Environment, Częstochowa University of Technology, 69 J.H. Dąbrowskiego Str., 42-200 Częstochowa, Poland
Beata Bień: Faculty of Infrastructure and Environment, Częstochowa University of Technology, 69 J.H. Dąbrowskiego Str., 42-200 Częstochowa, Poland
Małgorzata Wszelaka-Rylik: Faculty of Biology and Environmental Science, Cardinal Stefan Wyszynski University in Warsaw, Wóycickiego 1/3 Str, 01-938 Warsaw, Poland

Energies, 2024, vol. 18, issue 1, 1-14

Abstract: This paper presents results of a study on changes in the physical and chemical properties of papain-disintegrated sewage sludge subjected to methane fermentation and the effect of enzymes on the colony number of Escherichia coli , Salmonella spp. and Legionella spp. Fermentation studies were conducted in five batches, in which papain was introduced in amounts representing 0, 1, 2, 3 and 4% ( w / w ) by weight of the sludge dry matter content. The use of enzymatic disintegration allowed us to intensify the decomposition of organic compounds in the digestion process up to 31% and increase biogas production up to 41% compared to control sludge. At the same time, an almost complete reduction (99–100%) in the colony number of E. coli and Salmonella spp. could be achieved. Therefore, enzymatic disintegration can be competitive with physical or chemical disintegration methods.

Keywords: biogas; methane; sewage sludge; supernatants; anaerobic digestion; enzymatic disintegration; papain; E. coli; Salmonella spp.; Legionella spp. (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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