文献类型：期刊文献

英文题名：Microbial degradation of polyacrylamide by aerobic granules

作者：Liu, Lili[1];Wang, Zhiping[2];Lin, Kuangfei[1];Cai, Weimin[2]

机构：[1]E China Univ Sci & Technol, Coll Resource & Environm Engn, State Environm Protect Key Lab Environm Risk Asse, Shanghai 200237, Peoples R China;[2]Shanghai Jiao Tong Univ, Sch Environm Sci & Engn, Shanghai 200240, Peoples R China

年份：2012

卷号：33

期号：9

起止页码：1049

外文期刊名：ENVIRONMENTAL TECHNOLOGY

收录：;EI(收录号：20203209027052);WOS:【SCI-EXPANDED(收录号:WOS:000303582100012)】；

基金：This project was supported by the National Natural Science Foundation of China (41001316, 40871223), the National Natural Science Foundation of Shanghai (09ZR1407700) and the Fundamental Research Funds for the Central Universities (WB0914041). We thank Prof. Wei-chi Ying for the valuable discussion and revision.

语种：英文

外文关键词：granules; polyacrylamide; sequencing batch reactor; acclimation

摘要：To deal with polyacrylamide (PAM) wastewater, granular sludge formed in glucose-fed sequencing batch reactors (SBR) was employed to cultivate PAM-degrading granules. Three replicated SBRs were operated with increasing PAM concentration in the influent from 67 to 670 mg L-1, and the hydraulic retention time was increased at the same time from 1 d to 6 d during the six-phase of the 43 d acclimation period. The well-acclimated PAM-degrading granules were different from the seeding granules in colour, mean diameter, biomass density and settle ability, and could use PAM as the sole carbon and nitrogen source. In the batch experiments, PAM degradation rate by granules was determined as 2.23 mg PAM g(-1) MLSS h(-1). According to the analysis of the intermediates of PAM biodegradation, PAM was degraded initially through hydrolysis of the amide group, and no acrylamide monomer was detected. With the help of LC/MS, the main intermediate was identified as polyacrylic acid with a low molecular weight. Therefore, the PAM-degrading granular sludge may be employed for removing PAM in the wastewater produced from tertiary oil recovery that uses polymeric flooding technology.