污水水质对消毒产生急性毒性的影响  

Effect of Wastewater Characteristics on Acute Toxicity Incurred by Disinfection

作　　者：魏杰[1] 胡洪营[2] 王丽莎[2] 宁大亮[2] 魏东斌[2] 

机构地区：[1]深圳市城市规划设计研究院,广东深圳518031 [2]清华大学环境科学与工程系,北京100084

出　　处：《中国给水排水》2004年第12期17-20,共4页China Water & Wastewater

基　　金：国家自然科学基金资助项目(20277025);国家重点基础研究发展规划(973)项目(G1999045711);教育部留学回国人员科研启动资金资助项目

摘　　要：　利用发光细菌法考察了氯化/脱氯消毒过程中污水水质对消毒产生急性毒性的影响。研究发现,为准确客观地作出评价,首先应将不同加氯方式分开考虑;作为有毒副产物前体有机物的表征指标,UV254优于DOC,而DOC又优于COD;UV254值与有毒副产物前体物数量具有较好的相关性;在温度为20℃、消毒时间为30min、pH值为7.0的标准消毒条件下,当有效氯投量为10和50mg/L时,可以预测出峰点前加氯消毒后污水急性毒性增量(以Zn2+浓度表示)。Photo-bacteria bioassay was used to study the effect of wastewater characteristics on acute toxicity of disinfected wastewater during chlorination/dechlorination. It is found that consideration shall be given respectively to different chlorine addition method to make accurate and objective evaluation. As the characteristic index for expressing the precursors of toxic by-products, UV_(254) is superior to DOC, and DOC is superior to COD; UV_(254) is in good correlation with the quantity of precursors of toxic by-products. Under the standard disinfection conditions, i. e, temperature of 20 ℃, disinfection time of 30 min, and pH of 7.0, when the dosage of available chlorine is 10 mg/L and 50 mg/L, the acute toxicity increment (expressed as Zn^(2+) concentration) of disinfected wastewater can be predicted.

关 键 词：污水水质 氯化消毒 急性毒性 

分 类 号：X703.1[环境科学与工程—环境工程]