文献类型：期刊文献

英文题名：Intracellular polymers in aerobic sludge of sequencing batch reactors

作者：Fang, H.H.P.[1]; Liu, Y.[1]

机构：[1]Univ Hong Kong, Dept Civil Engn, Envir Engn Res Ctr, Hong Kong, Peoples R China;[2]E China Univ Sci & Technol, Dept Environm Engn, Shanghai, Peoples R China

年份：2000

卷号：126

期号：8

起止页码：732

外文期刊名：JOURNAL OF ENVIRONMENTAL ENGINEERING-ASCE

收录：;EI(收录号：2000395281970);WOS:【SCI-EXPANDED(收录号:WOS:000088391100007)】；

语种：英文

外文关键词：Aromatic hydrocarbons - Chemical reactors - Fatty acids - Glucose

摘要：The formation and characteristics of intracellular polymers in aerobic sludge of sequencing batch reactors were investigated at ambient temperature under balanced nutrient conditions. Three substrates of different chemical natures, including fatty acid (acetate), carbohydrate (glucose), and aromatic (benzoate), were fed to individual reactors. When substrates were initially in excess, the sludge in all reactors was capable of converting soluble substrates into intracellular polymers under aerobic conditions. Acetate (up to 27%) and benzoate (up to 51%) were converted to poly-beta-hydroxybutyrate, whereas glucose (up to 33%) was converted to intracellular carbohydrates. The initial substrate depletion rates were 208-243 mg-C/g-VSS/h for acetate, 491-590 mg-C/g-VSS/h for benzoate, and 405-558 mg-C/g-VSS/h for glucose. When external substrates were absent in the mixed liquor, the intracellular polymers could be consumed by the sludge for endogenous respiration under aerobic conditions or as a carbon source for denitrification under anoxic conditions. These results suggest a dynamic metabolic mechanism in the sequencing batch reactors.