Enhanced production of volatile fatty acids (VFAs) from sewage sludge by 尾-cyclodextrin

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• 作者：Xue Yang^a ; Maoan Du^a ; Duu-Jong Lee^b ; ^c ; ^{djlee@ntu.edu.tw} ; Chunli Wan^a ; Lina Zheng^d ; Guanyuan Li^a ; Jo-Shu Chang^e ; ^f ; ^g
• 关键词：Sewage sludge ; Hydrolysis ; 尾-Cyclodextrin ; Metabolites
• 刊名：Bioresource Technology
• 出版年：2012
• 期刊代码：11_09608524
• 类别：ce
• 出版时间：April, 2012
• 卷：110
• 期：Complete
• 页码：688-691
• 文件大小：323 K

摘要

Organic matter in sewage sludge can be converted into volatile fatty acids (VFAs) as renewable carbon sources. This work for the first time demonstrates that 尾-cyclodextrin (尾-CD) molecules enhance sludge hydrolysis for production of VFAs. With 0.2 g 尾-CD g^鈭? dried solids (DSs), the increment rate for VFAs peaked at 4200 g g^鈭? DSs g^鈭? 尾-CD, with acetate and propionate as the predominant VFAs. Compositional and microbial community analyses confirm that the 尾-CD molecules break a cell鈥檚 membrane, such that it releases intracellular substances. Although 尾-CD molecules inhibited activities of methanogens, they did not impair those of acid-forming bacteria, thereby demonstrating that 尾-CD-assisted VFAs are renewable organic carbon sources, except in anaerobic digestion processes.