Effect of Bioaugmentation on Biogas Yields and Kinetics in Anaerobic Digestion of Sewage Sludge

Magdalena Lebiocka, Agnieszka Montusiewicz and Agnieszka Cydzik-Kwiatkowska
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Magdalena Lebiocka: Faculty of Environmental Engineering, Lublin University of Technology, 40B Nadbystrzycka, 20-618 Lublin, Poland
Agnieszka Montusiewicz: Faculty of Environmental Engineering, Lublin University of Technology, 40B Nadbystrzycka, 20-618 Lublin, Poland
Agnieszka Cydzik-Kwiatkowska: Faculty of Environmental Sciences, University of Warmia and Mazury in Olsztyn, 45g Słoneczna, 10-709 Olsztyn, Poland

IJERPH, 2018, vol. 15, issue 8, 1-16

Abstract: Bioaugmentation with a mixture of microorganisms (Bacteria and Archaea) was applied to improve the anaerobic digestion of sewage sludge. The study was performed in reactors operating at a temperature of 35 °C in semi-flow mode. Three runs with different doses of bioaugmenting mixture were conducted. Bioaugmentation of sewage sludge improved fermentation and allowed satisfactory biogas/methane yields and a biodegradation efficiency of more than 46%, despite the decrease in hydraulic retention time (HRT) from 20 d to 16.7 d. Moreover, in terms of biogas production, the rate constant k increased from 0.071 h −1 to 0.087 h −1 as doses of the bioaugmenting mixture were increased, as compared to values of 0.066 h −1 and 0.069 h −1 obtained with sewage sludge alone. Next-generation sequencing revealed that Cytophaga sp. predominated among Bacteria in digesters and that the hydrogenotrophic methanogen Methanoculleus sp. was the most abundant genus among Archaea.

Keywords: anaerobic digestion; wastewater sludge; bioaugmentation; metagenome; NGS (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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