Optimization of Biogas Production from Organic Municipal Waste: Development of Activated Sludge as Digesters Inoculum

作     者：Mahamadi Nikièma Marius K. Somda Kifouli Adéoti Désiré Traoré Farid Baba-Moussa Fatiou Toukourou Dayéri Dianou Alfred S. Traoré 

作者机构：Centre de Recherche en Sciences Biologiques Alimentaires et Nutritionnelles (CRSBAN) Département de Biochimie-Microbiologie Université Ouaga I Pr Joseph KI-ZERBO 03 BP 7131Ouagadougou 03 Burkina Faso Laboratoire de Microbiologie et Technologies Alimentaires (LAMITA) Département de Biologie végétale Université d’Abomey-Calavi B.P. 526 Abomey-Calavi Bénin Centre National de la Recherche Scientifique et Technologique (CNRST) 03 BP 7192 Ouagadougou 03 Burkina Faso Ouagadougou Burkina Faso 

出 版 物：《Journal of Environmental Protection》 (环境保护（英文）)

年 卷 期：2017年第8卷第13期

页      面：1674-1687页

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 

主　　题：Bioconversion Municipal Waste Activated Sludge Biomethane Burkina Faso 

摘      要：This study is a contribution to the optimization of organic fraction of municipal waste bioconversion into biomethane, by activated sludge production as inoculum for digesters. The wastewater (WW) and cow dung (CD) samples were taken from the slaughterhouse of Ouagadougou town, Burkina Faso. Different mixtures were made, enriched with mineral solution and cellulose at 5% (w/v) as: 10% CD + 90% WW (C7), 30% CD + 70% WW (C6), 50% CD + 50% WW (C5), 70% CD + 30% WW (C4), 90% CD + 10% WW (C3), 100% CD (C2) and 100% WW (C1). The pH evolution and biogas (CH4 and CO2) production were followed for 25 days. Cultures tend to acidify with increase in cow dung proportion. Biogas production was significantly higher (p 0.05) in C5 (880.0 mL), C6 (862.0 10 mL) and C7 (772.0 mL). Mixture C5 had a highest level of CO2 production (40%). Also C7 and C6 retained in the experiment contained respectively organic matter, volatile fatty acids (VFA) and total alkalinity (TAC) as 41.06%, 47.02%, 1320 mg acetic acid/L, 3036 mg Acetic acid/L and 520 mg CaCO3/L, 1310 mg CaCO3/L. Mixture C6 was the best medium for microorganism proliferation stability with 3.5 × 105 UFC/ml of methanogens bacteria. It also possessed buffering capacity, which prevents acidification of medium during VFAs production.