Optimization of Biogas Production from Sewage Sludge: Impact of Combination with Bovine Dung and Leachate from Municipal Organic Waste

Mahamadi Nikiema, Narcis Barsan, Ynoussa Maiga, Marius K. Somda, Emilian Mosnegutu, Cheik A. T. Ouattara, Dayeri Dianou, Alfred S. Traore, Valentin Nedeff and Aboubakar S. Ouattara
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Mahamadi Nikiema: Research Center of Biological, Food and Nutritional Sciences (CRSBAN), Laboratory of Microbiology and Microbial Biotechnology (LAMBM), University Joseph KI-ZERBO, Ouagadougou 03 BP 7131, Burkina Faso
Narcis Barsan: Faculty of Engineering, Vasile Alexandri University of Bacau, Calea Marasesti, no. 157, 600115 Bacau, Romania
Ynoussa Maiga: Research Center of Biological, Food and Nutritional Sciences (CRSBAN), Laboratory of Microbiology and Microbial Biotechnology (LAMBM), University Joseph KI-ZERBO, Ouagadougou 03 BP 7131, Burkina Faso
Marius K. Somda: Research Center of Biological, Food and Nutritional Sciences (CRSBAN), Laboratory of Microbiology and Microbial Biotechnology (LAMBM), University Joseph KI-ZERBO, Ouagadougou 03 BP 7131, Burkina Faso
Emilian Mosnegutu: Faculty of Engineering, Vasile Alexandri University of Bacau, Calea Marasesti, no. 157, 600115 Bacau, Romania
Cheik A. T. Ouattara: Research Center of Biological, Food and Nutritional Sciences (CRSBAN), Laboratory of Microbiology and Microbial Biotechnology (LAMBM), University Joseph KI-ZERBO, Ouagadougou 03 BP 7131, Burkina Faso
Dayeri Dianou: National Center Scientifically and Technological Research (CNRST), Ouagadougou 03 BP 7192, Burkina Faso
Alfred S. Traore: Research Center of Biological, Food and Nutritional Sciences (CRSBAN), Laboratory of Microbiology and Microbial Biotechnology (LAMBM), University Joseph KI-ZERBO, Ouagadougou 03 BP 7131, Burkina Faso
Valentin Nedeff: Faculty of Engineering, Vasile Alexandri University of Bacau, Calea Marasesti, no. 157, 600115 Bacau, Romania
Aboubakar S. Ouattara: Research Center of Biological, Food and Nutritional Sciences (CRSBAN), Laboratory of Microbiology and Microbial Biotechnology (LAMBM), University Joseph KI-ZERBO, Ouagadougou 03 BP 7131, Burkina Faso

Sustainability, 2022, vol. 14, issue 8, 1-12

Abstract: Biogas is a bioenergy produced from organic or all types of biological degradable wastes and could make it possible to limit energy dependence. Sludge is the best alternative substrate for biogas production at a community-level biogas plant. The literature shows that co-digestion can increase the efficiency of sludge anaerobic digestion. This research, thus, focused on (i) determining the conditions of optimal biogas production in the co-digestion of primary sludge (PS) and bovine dung (BD), (ii) evaluating the impact of leachate from organic waste and cellulose on biogas production. Primary sludge was collected in Bacau town wastewater treatment plant in Romania. The sampling of municipal solid waste was carried out in Ouagadougou pre-collect centers (Burkina Faso). Batch tests were conducted in glass bottles through anaerobic digestion (1 L). The following parameters were monitored during the digestion process: pH, volatile fatty acid (VFA), volatile solids (VS) and biogas production. Primary sludge, bovine dung and leachate showed 50.51%, 72.41% and 70.48% of volatile solids content, respectively. Sludge showed good stability, unlike the other two substrates, such as bovine dung and leachate, with VFA to alkalinity ratio 0.54. Leachate from organic waste had high values of VFA to alkalinity ratio > 3600. Co-digestion could make it possible to raise the levels of organic matter and improve microbial growth and the stability of anaerobic biomass. The best biogas production yield of 152.43 mL/g VS was obtained with a combination of 30% bovine dung and 70% primary sludge at 45 °C, with a 21.57% reduction in organic matter. An improvement in biogas productivity was effective with the addition of leachate, which could be used as an additive element during anaerobic digestion.

Keywords: anaerobic digestion; co-digestion; sludge; bovine dung; municipal organic waste; bioenergy (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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