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个人信息Personal Information
教授
博士生导师
硕士生导师
主要任职：Professor
性别：男
毕业院校：奥地利University of Graz
学位：博士
所在单位：环境学院
学科：环境工程. 环境科学. 水科学与技术
办公地点：大连理工大学环境学院
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Improving the co-digestion performance of waste activated sludge and wheat straw through ratio optimization and ferroferric oxide supplementation
点击次数：
论文类型：期刊论文
发表时间：2018-11-01
发表刊物：BIORESOURCE TECHNOLOGY
收录刊物：Scopus、SCIE、PubMed
卷号：267
页面范围：591-598
ISSN号：0960-8524
关键字：Co-digestion; Fe3O4; Ethanol-type fermentation; Acidic pH
摘要：Low anaerobic digestion efficiency of wheat straw (WS) has been an intractable problem owing to its high C/N ratio and complex structure. In this study, co-digestion of WS and waste activated sludge (WAS) at different ratios was performed to identify conditions that would elevate the acidic pH and increase methane production. The results showed that using a 1:1 ratio of WS and WAS, methane production in the co-digester was 26.9% higher than the sum of equal WAS and WS mono-digestion. When Fe3O4 was added to the co-digester, the acidic pH was further relieved and the anaerobic digestion efficiency was additionally enhanced. Microbial analysis showed that the ethanol-type fermentative bacterial genus Ethanoligenens was enriched in the WAS + WS-Fe3O4 reactor, in which the production of propionate was notably reduced, indicating that Fe3O4 could prevent the accumulation of volatile fatty acids by changing the types of fermentative bacteria present and promote anaerobic digestion efficiency.