化工学报
化工學報
화공학보
JOURNAL OF CHEMICAL INDUSY AND ENGINEERING (CHINA)
2014年
9期
3647-3653
,共7页
宿程远%刘兴哲%王恺尧%李伟光
宿程遠%劉興哲%王愷堯%李偉光
숙정원%류흥철%왕개요%리위광
废水%厌氧%EGSB反应器%颗粒污泥%粒径分布%胞外聚合物
廢水%厭氧%EGSB反應器%顆粒汙泥%粒徑分佈%胞外聚閤物
폐수%염양%EGSB반응기%과립오니%립경분포%포외취합물
wastewater%anaerobic%EGSB reactor%granular sludge%particle size distribution%extracellular polymeric substances
通过分析厌氧颗粒污泥粒径分布、机械强度、二价金属含量、胞外聚合物含量等，探讨了EGSB反应器处理中药废水过程中颗粒污泥特性变化。结果表明，在中药废水COD浓度为2000～5000 mg·L-1、HRT为12 h、T为30℃的条件下，颗粒污泥粒径分布在500～1000μm之间，完整系数（integrity coefficient，IC）小于20，颗粒污泥EPS总量、蛋白含量、多糖含量分别为85.59、63.67和21.92 mg·(g VSS)-1，此时颗粒污泥絮凝性良好，机械强度高。当HRT减少为6 h时，IC为30.03，蛋白与多糖的比值增大到6.86，但多糖含量仅为18.11 mg·(g VSS)-1；而当T降低为20℃时，颗粒污泥粒径分布在250～750μm之间，IC增大到32.11，Ca2+、Mg2+、Mn2+含量减少为20.78、4.79和0.94 mg·L-1，颗粒污泥EPS显著降低，其总量、蛋白含量、多糖含量仅为69.04、58.87和10.17 mg·(g VSS)-1，在此运行条件下，出现了颗粒污泥的解体、流失，同时出水水质变差。
通過分析厭氧顆粒汙泥粒徑分佈、機械彊度、二價金屬含量、胞外聚閤物含量等，探討瞭EGSB反應器處理中藥廢水過程中顆粒汙泥特性變化。結果錶明，在中藥廢水COD濃度為2000～5000 mg·L-1、HRT為12 h、T為30℃的條件下，顆粒汙泥粒徑分佈在500～1000μm之間，完整繫數（integrity coefficient，IC）小于20，顆粒汙泥EPS總量、蛋白含量、多糖含量分彆為85.59、63.67和21.92 mg·(g VSS)-1，此時顆粒汙泥絮凝性良好，機械彊度高。噹HRT減少為6 h時，IC為30.03，蛋白與多糖的比值增大到6.86，但多糖含量僅為18.11 mg·(g VSS)-1；而噹T降低為20℃時，顆粒汙泥粒徑分佈在250～750μm之間，IC增大到32.11，Ca2+、Mg2+、Mn2+含量減少為20.78、4.79和0.94 mg·L-1，顆粒汙泥EPS顯著降低，其總量、蛋白含量、多糖含量僅為69.04、58.87和10.17 mg·(g VSS)-1，在此運行條件下，齣現瞭顆粒汙泥的解體、流失，同時齣水水質變差。
통과분석염양과립오니립경분포、궤계강도、이개금속함량、포외취합물함량등，탐토료EGSB반응기처리중약폐수과정중과립오니특성변화。결과표명，재중약폐수COD농도위2000～5000 mg·L-1、HRT위12 h、T위30℃적조건하，과립오니립경분포재500～1000μm지간，완정계수（integrity coefficient，IC）소우20，과립오니EPS총량、단백함량、다당함량분별위85.59、63.67화21.92 mg·(g VSS)-1，차시과립오니서응성량호，궤계강도고。당HRT감소위6 h시，IC위30.03，단백여다당적비치증대도6.86，단다당함량부위18.11 mg·(g VSS)-1；이당T강저위20℃시，과립오니립경분포재250～750μm지간，IC증대도32.11，Ca2+、Mg2+、Mn2+함량감소위20.78、4.79화0.94 mg·L-1，과립오니EPS현저강저，기총량、단백함량、다당함량부위69.04、58.87화10.17 mg·(g VSS)-1，재차운행조건하，출현료과립오니적해체、류실，동시출수수질변차。
The characteristics of granular sludge in the EGSB reactor treating TCM wastewater were analyzed in terms of particle size distribution (PSD), integrity coefficient (IC), metal content and extracellular polymeric substances (EPS) of granular sludge. When COD concentration was 2000-5000 mg·L-1, hydraulic residence time (HRT) was 12 h, temperature was 30℃, the peak of PSD was in the range of 500-1000μm, IC value was less than 20, and the contents of total EPS, protein, polysaccharide in granular sludge were 85.59, 63.67 and 21.92 mg·(g VSS)-1, respectively. At this stage, flocculation of granular sludge was good, and its mechanical strength was high. When HRT was reduced to 6 h, IC value increased to 30.03, and the ratio of protein and polysaccharide increased to 6.86. However,the concentration of polysaccharide in granular sludge decreased to 18.11 mg·(g VSS)-1. When temperature decreased to 20℃, the peak of PSD was in the range of 250-750μm and IC value was 32.11. The concentrations of Ca2+, Mg2+and Mn2+were only 20.78, 4.79 and 0.94 mg·L-1, respectively. At the same time, the contents of total EPS, protein, polysaccharide in granular sludge were 69.04, 58.87 and 10.17 mg·(g VSS)-1, respectively. During this period, granular sludge was washed out from the EGSB reactor and COD removal efficiency decreased.
