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杀菌剂对不同生长状态下生物黏泥的作用效果
刘芳,夏璐,常新,杨飞,赵朝成
(中国石油大学化学工程学院, 山东青岛 266555)

摘要:

在不同状态下培养生物黏泥,考察生物黏泥的生长特性和ClO₂对不同类型生物黏泥的杀菌过程,确定ClO₂有效杀菌时间和杀菌质量浓度。结果表明:当培养液中营养配比分别为ρ(CODCr)∶ρ(N)∶ρ(P)=50∶10∶1、100∶10∶1和150∶10∶1时,生物黏泥的湿重和胞外聚合物的含量增加;当培养状态为ρ(CODCr)∶ρ(N)∶ρ(P)=100∶10∶1时,生物黏泥的脱氢酶活性含量最大;当培养液中碳源质量浓度增加时,ClO₂作用的有效时间随之延长,分别为1、1.5、1.75 h,ClO₂有效杀菌质量浓度也随之增大,分别为0.5、1.5和2 mg/L。

关键词: 生物黏泥二氧化氯杀菌效果营养配比

DOI：10.3969/j.issn.1673-5005.2011.05.030

分类号::TQ 085

文献标识码:A

基金项目:国家自然科学基金项目(20707040,3);污染控制与资源化研究国家重点实验室开放课题(PCRRF08002);中央高校基本科研业务费专项基金

Effect of biocide on biofouling formation at different growth conditions

LIU Fang, XIA Lu, CHANG Xin, YANG Fei, ZHAO Chao cheng

(College of Chemical Engineering in China University of Petroleum, Qingdao 266555, China)

Abstract:

The growth characteristics of biofouling at different cultivating conditions were investigated. Then, the antibacterial effect of chlorine dioxide on biofouling at different cultivating conditions was investigated, and the effective antibacterial time and concentration of chlorine dioxide were obtained. The results show that the wet weight and extra-cellular polymeric substances of biofouling increase when nutritive proportions are ρ(CODCr)∶ρ(N)∶ρ(P)=50∶10∶1,0∶10∶1 and 150∶10∶1, respectively. However, dehydrogenase activity (DHA) of biofouling is the biggest at ρ(CODCr)∶ρ(N)∶ρ(P)=100∶10∶1. The effective antibacterial time chlorine dioxide acting increases with the mass concentration of carbon increasing, which is 1,1.5 and 1.75 h, respectively. In addition, effective antibacterial concentration of chlorine dioxide also increases,which is 0.5,1.5 and 2 mg/L, respectively.

Key words: biofouling chlorine dioxide antibacterial effect nutritive proportion