Optimization of extracellular polymeric substance extraction method of different sludge - 文章详情页

作者：

Wang, S. (Wang, S..) | He, Y. (He, Y..) | Li, X. (Li, X..) | Jia, F. (Jia, F..) | Guo, S. (Guo, S..)

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Scopus PKU CSCD

摘要：

Extracellular　polymeric　substances　(EPS)　is　an　important　determinant　of　the　characters　of　sludge　produced　in　biological　wastewater　treatment　processes,　including　the　structure,　dewaterability,　flocculation　and　settling　behavior.　However,　the　different　extraction　methods　of　EPS　leaded　to　more　discrepancy　of　EPS　stripping　degree.　Thus,　the　establishment　of　the　EPS　extraction　from　sludge　method　is　crucial.　Six　different　methods　were　employed　to　extract　EPS　from　different　sludge　in　this　study,　and　the　content　and　composition　of　EPS　in　different　sludge　layers　were　analyzed.　Meanwhile,　the　relationship　between　the　sludge　particle　size　and　dewatering　performance　and　the　EPS　were　investigated.　Results　show　that　the　EPS　content　is　different　in　different　processes　of　reactor.　Formaldehyde　+　NaOH　extraction　method　was　proved　to　be　the　most　efficient　method　to　extract　EPS　from　sludge,　and　the　destructiveness　on　cells　of　this　method　was　relatively　slight.　The　extracted　EPS　content　of　different　sludge　of　the　method　is　in　the　range　of　15.88-39.30　mg/gVSS.　The　content　of　slime-EPS　is　higher,　the　ratio　of　protein　and　polysaccharide　is　larger,　but　the　dewaterability　of　the　sludge　is　poorer.　Besides,　the　sludge　particle　size　is　greater,　and　the　extraction　efficiency　of　EPS　is　higher.　©　2016,　Beijing　University　of　Technology.　All　right　reserved.

关键词：

Dewaterability; EPS (extracellular polymeric substances); Extraction method; Particle size of sludge

作者机构：

[ 1 ] [Wang, S.]Engineering Research Center of Beijing, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing, 100124, China
[ 2 ] [He, Y.]Engineering Research Center of Beijing, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing, 100124, China
[ 3 ] [Li, X.]Engineering Research Center of Beijing, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing, 100124, China
[ 4 ] [Jia, F.]Engineering Research Center of Beijing, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing, 100124, China
[ 5 ] [Guo, S.]Engineering Research Center of Beijing, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing, 100124, China

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