ClO_2溶胞对SBR处理系统污泥减量研究  

Study on sludge reduction in SBR by chlorine dioxide disintegration

作　　者：梁树焜[1] 胡勇有[1] 林嘉添[1] 何向明[2] 谢义忠[2] 李凌云[2] 

机构地区：[1]华南理工大学环境科学与工程学院工业聚集区污染控制与生态修复教育部重点实验室,广州510006 [2]南海发展股份有限公司,南海528200

出　　处：《环境工程学报》2011年第6期1409-1413,共5页Chinese Journal of Environmental Engineering

基　　金：广东省科技计划项目(2007A032302001)

摘　　要：通过烧杯溶胞实验,考察了ClO2处理SBR剩余污泥上清液△SCOD随处理时间的变化,以确定ClO2溶胞最佳方式;在SBR中试系统,把系统排出剩余污泥的50%经ClO2处理后回流至处理系统,运行50 d,考察处理系统的污泥减量效果及其对系统污水处理效果的影响。结果表明,ClO2具有良好的溶胞作用,在最佳投量为8 mg ClO2/(g干泥)、转速为120 r/min机械搅拌和最佳反应时间60 min下,污泥上清液SCOD增加83.3 mg/(L.g干泥),多糖、蛋白质、TP和TN增加量分别为22.7、77.3、8.8和5.3 mg/(L.g干泥);污泥细胞灭活率92.5%。在相同的SBR系统工况下,经ClO2处理后的剩余污泥的回流至系统后,产泥量减少了35.5%。ClO2处理污泥回流对SBR系统的COD、NH3-N和TN去除效果无影响,对SS和TP的去除略有降低。本研究为ClO2处理剩余污泥回流的SBR系统污泥减量试验提供了基础依据。To obtain the optimal operation mode of using ClO2 for excess sludge reduction in SBR,the variation of △SCOD in supernatant liquid with time after ClO2 treatment was investigated through beaker experiments.50% of excess sludge was subjected to ClO2 treatment before it returned to the SBR and the effects of this process on the excess sludge reduction and effluent quality were evaluated by 50 days＇ operation.The results showed that the sludge disintegrability of ClO2 was excellent.At the ClO2 doses of 8 mg ClO2/（g MLSS）,mechanical stirring speed of 120 r/min and the reaction time of 60 min,the SCOD increased by 83.3 mg/（L·g MLSS）,the polysaccharide,protein,TP and TN in supernatant liquid increased by 22.7,77.3,8.8 and 5.3 mg/（L·g MLSS）,respectively,based on a 92.5% of cell dead rate.Under the same operation conditions of SBR,the sludge production was reduced by 35.5% after incorporating the ClO2-pretreated sludge into SBR.The reflux of the sludge pretreated by ClO2 exerted little effect on the removal of COD,NH3-N and TN in SBR system,while it could slightly reduce the removal efficiency of SS and TP.This study contributes to the practical application of ClO2 for excess sludge reduction in an activated sludge process.

关 键 词：二氧化氯 SBR 污泥减量 

分 类 号：X703.1[环境科学与工程—环境工程]