Synergic removal on Chironomus kiiensis larvae in urban water source with pre-oxidantion
Chironomus kiiensis larvae which cannot be exterminated by conventional disinfection process propagates prolifically in eutrophic water body,and it therefore turns to be a potential problem encountered in drinking water quality.In this work,the quantitative experimental studies were carried out on removal of Chironomus kiiensis larvae in raw water by coagulation-sedimentation process.The coagulation jar test showed that the Chironomus kiiensis larvae could be partially removed from water by coagulation-sedimentation process.Based on it,removal effect of pre-oxidation combined with coagulation-sedimentation process on Chironomus kiiensis larvae was evaluated.The results showed that chlorine dioxide pre-oxidation possessed better removal performance than prechlorinion,and Chironomus kiiensis larvae in the raw water could be completely removed by chlorine dioxide pre-oxidation in combination with the coagulation-sedimentation process at chlorine dioxide dosage of 0.8mg/L.The pH in the range of 6-8 did not affect the inactivation efficiency of chlorine dioxide,whereas pH 10 resulted in around 10％ decrease in removal rate.Meanwhile,the removal rate of Chironomus kiiensis larvae improved with the temperature increasing within the range investigated of 15-30℃.The removal rate was reduced by 6.7％ when temperature reduced from 30℃ to 15℃.
Chironomus kiiensis larvae Water treatment Chlorine dioxide Removal Pre-oxidation.
Sun Xingbin Cui Fuyi Hou Zhaochao Meng Lin
Department of Environmental Science Northeast Forestry University Municipal and Environmental Engineering Harbin Institute of Technology
国际会议
哈尔滨
英文
735-739
2010-07-24（万方平台首次上网日期，不代表论文的发表时间）