文献类型：期刊文献

英文题名：Contrasting sludge toxicity under various starting modes (shocking or acclimating) and original organics (with or without N, N-dimethylformamide (DMF))

作者：Chen, Xiurong[1];Zhao, Jianguo[1];Zhao, Jun[1];He, Yixuan[1];Wang, Lu[1];Bao, Zheng[1]

机构：[1]E China Univ Sci & Technol, Sch Resource & Environm Engn, Shanghai 200237, Peoples R China

年份：2015

卷号：104

起止页码：435

外文期刊名：INTERNATIONAL BIODETERIORATION & BIODEGRADATION

收录：;EI(收录号：20153201125142);WOS:【SCI-EXPANDED(收录号:WOS:000362308400058)】；

基金：This study was financially supported by the Natural Science Foundation of China (No. 51008124, 51378207), the Natural Science Foundation for Distinguished Young Scholars of China (No. 51125032) and the Shanghai Pujiang Program (No. 13PJD009) in China.

语种：英文

外文关键词：DMF synthetic wastewater; Sludge toxicity; Acclimating starting; Shocking starting; Proteomics analysis

摘要：Sludge toxicity, as determined by the inhibition of luminescence in the bacterium Photobacterium phosphoreum (P. phosphoreum), was formed during either acclimating or shocking starting processes with high concentrations of N, N-dimethylformamide (DMF). In the acclimating starting process, the sludge was first acclimated with 120 mg L-1 DMF before 200 mg L-1 DMF was added, whereas in the shock starting process, the sludge was fed with 200 mg L-1 DMF directly. The results showed that the toxicity of the sludge shocked with 200 mg L-1 DMF was significantly higher than that of the acclimated sludge throughout the entire process. The maximum toxicity gap between the shocked and acclimated sludge appeared at the initial stage, and the gap decreased with operation time. In addition, the maximum toxicity existed for 6-8 h in a single SBR cycle, regardless of the starting process. Proteomics analysis indicated that the responses of the shocked and acclimated sludge to DMF stimulation were different. As a result, toxic substances accumulated in the sludge through various factors, including secretions from two types of sludge under DMF stress conditions. (C) 2015 Elsevier Ltd. All rights reserved.