期刊
BIORESOURCE TECHNOLOGY
卷 100, 期 21, 页码 5002-5009出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2009.05.029
关键词
Sludge reduction; Ozonation; Lysis-cryptic growth; Microbial activity; Microbial population
资金
- Hi-Tech Research and Development Program of China (863 Plan) [2007AA06Z347]
- National Science Fund of China [20777045]
- National Key Basic Research Program (973 plan) [2007CB109203]
Two lab-scale bioreactors (reactors 1 and 2) were employed to examine the changes in biological performance and the microbial community of an activated sludge process fed with ozonated sludge for sludge reduction. During the 122 d operation, the microbial activities and community in the two reactors were evaluated. The results indicated that, when compared with the conventional reactor (reactor I), the reactor that was fed with the ozonated sludge (reactor 2) showed good removal of COD, TN and cell debris, without formation of any excess sludge. In addition, the protease activity and intracellular ATP concentration of reactor 2 were increased when compared to reactor 1, indicating that reactor 2 had a better ability to digest proteins and cell debris. DGGE analysis revealed that the bacterial communities in the two reactors were different, and that the dissimilarity of the bacterial Population was nearly 40%. Reactor 2 also contained more protozoa and metazoa, which could graze on the ozone-treated sludge debris directly. (C) 2009 Elsevier Ltd. All rights reserved
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据