Enhancement of biogas potential of primary sludge by co-digestion with cow manure and brewery sludge  

作　　者：Irene Nansubuga Noble Banadda Mohammed Babu Jo De Vrieze Willy Verstraete Korneel Rabaey 

机构地区：[1]Laboratory of Microbial Ecology and Technology(LabMET),Ghent University,Coupure links 653,B-9000 Gent,Belgium [2]Department of Agricultural and Bio-Systems Engineering,Makerere University,P.O.Box 7062,Kampala,Uganda [3]National Water and Sewerage corporation,Plot 39,Jinja Road,P.O.Box 7053,Kampala,Uganda

出　　处：《International Journal of Agricultural and Biological Engineering》2015年第4期86-94,共9页国际农业与生物工程学报（英文）

基　　金：The authors wish to acknowledge the financial support from VLIR,the Belgian scholarship body and National Water and Sewerage Corporation(NWSC)for further support in Uganda.We also wish to acknowledge Henry Mugabi(EABL),Cyrus Galyaki,Nabatesa Sylvia and Chaba Charles(NWSC)for the Lab and field work support.Willy Verstraete and Korneel Rabaey acknowledge support from the Ghent University Multidisciplinary Research Partnership(MRP)“Biotechnology for a Sustainable Economy”(01 MRA 510W).

摘　　要：Anaerobic digestion(AD)has long been used to treat different types of organic wastes especially in the developed world.However,organic wastes are still more often considered as a waste instead of a resource in the developing world,which contributes to environmental pollution arising from their disposal.This study has been conducted at Bugolobi Sewage Treatment Plant(BSTP),where two organic wastes,cow manure and brewery sludge were co-digested with primary sludge in different proportions.This study was done in lab-scale reactors at mesophilic temperature and sludge retention time of 20 d.The main objective was to evaluate the biodegradability of primary sludge generated at BSTP,Kampala,Uganda and enhance its ability of biogas production.When the brewery sludge was added to primary STP sludge at all proportions,the biogas production rate increased by a factor of 3.This was significantly(p<0.001)higher than observed gas yield(337±18)mL/(L·d))in the control treatment containing(only STP sludge).Co-digesting STP sludge with cow manure did not show different results compared to the control treatment.In conclusion,Bugolobi STP sludge is poorly anaerobically degradable with low biogas production but co-digestion with brewery sludge enhanced the biogas production rate,while co-digestion with cow manure was not beneficial.

关 键 词：wastewater treatment CO-DIGESTION cow manure BREWERY primary sludge BIOGAS energy recovery 

分 类 号：X70[环境科学与工程—环境工程]