Effect of Sludge Retention Time on the Fate of Proteins and Polysaccharides in AAO Process  

作　　者：杜勇立 黄满红 郑宇 

机构地区：[1]School of Civil and Architectural Engineering,Central South University [2]Hunan Provincial Communications Planning,Survey & Design Institute [3]School of Environmental Science and Engineering,Donghua University

出　　处：《Journal of Donghua University(English Edition)》2015年第3期401-405,共5页东华大学学报（英文版）

基　　金：National Natural Science Foundations of China(Nos.21477018,21007010);Hunan Province Ministry of Transportation Scientific Research Projects,China(Nos.200908,201105);Ministry of Transport Science and Technology Program,China(No.2010353343290)

摘　　要：Effect of sludge retention time( SRT) on the removal of potential and polysaccharides in an anaerobic / anoxic / aerobic( AAO) process was investigated. The Lowry method and anthrone method were used to detect proteins and polysaccharides. Total removal efficiency of proteins at SRT of 10 to 25 d in the AAO system was higher than 90%. Polysaccharides removal efficiencies were above 80% when SRT was increased from 15 to 25 d,whereas only 81% of polysaccharides was removed at SRT of 10 d. The biodegradation part of proteins and polysaccharides increased from87. 40% to 93% and from 74. 22% to 86. 94% with increasing SRTs.The ratios of polysaccharides and proteins in extracellular polymer substances( EPSs) were around 1. 5-3 in different SRTs. As SRT increasing,polysaccharides and proteins discharged with residual sludge decreased gradually. The amount of EPSs decreased with increasing SRTs.Effect of sludge retention time（ SRT） on the removal of potential and polysaccharides in an anaerobic / anoxic / aerobic（ AAO） process was investigated. The Lowry method and anthrone method were used to detect proteins and polysaccharides. Total removal efficiency of proteins at SRT of 10 to 25 d in the AAO system was higher than 90%. Polysaccharides removal efficiencies were above 80% when SRT was increased from 15 to 25 d,whereas only 81% of polysaccharides was removed at SRT of 10 d. The biodegradation part of proteins and polysaccharides increased from87. 40% to 93% and from 74. 22% to 86. 94% with increasing SRTs.The ratios of polysaccharides and proteins in extracellular polymer substances（ EPSs） were around 1. 5-3 in different SRTs. As SRT increasing,polysaccharides and proteins discharged with residual sludge decreased gradually. The amount of EPSs decreased with increasing SRTs.

关 键 词：protein polysaccharide sludge retention time(SRT) anaerobic / anoxic / aerobic(AAO) system extracellular polymer substances(EPSs) 

分 类 号：X703.1[环境科学与工程—环境工程]