二氧化氯消毒剂治理医院污水的研究  

RESEARCH ON TREATMENT OF HOSPITAL EFFLUENT WITH CHLORINE DIOXIDE DISINFECTION

作　　者：邓小红[1] 郭洁[2] 

机构地区：[1]重庆文理学院化学与环境科学系,重庆402160 [2]四川大学华西公共卫生学院

出　　处：《现代预防医学》2008年第21期4137-4139,共3页Modern Preventive Medicine

摘　　要：[目的]研究二氧化氯消毒医院污水中粪大肠菌群数、细菌总数的主要影响因素及其灭菌效果。[方法]多因素正交实验,以ClO2投加量、污水温度、接触时间、pH值等工艺参数作为实验影响因素;单因素实验,对ClO2投加量(2、4、6、8、10、12mg/L)、污水温度(10℃、20℃及30℃)、接触时间(5、10、30、60及90min)的灭菌效果实验。[结果]ClO2灭菌效果随着ClO2投加量的增加、污水温度升高、接触时间延长而增强;ClO2消毒剂在医院污水治理中影响因素的主次顺序为:ClO2投加量、污水温度、接触时间、pH值。最佳工艺参数为:ClO2投加量8～10mg/L、污水温度20℃～30℃、接触时间为30～60min时,医院污水中细菌总数和粪大肠菌群数的去除率均达到96%以上,其中pH值对ClO2灭菌效果的影响较小,可以不必考虑。[结论]二氧化氯消毒医院污水的灭菌效果好,达到GB8978-1996《污水综合排放标准》一级标准。[Objective] To research on efficacy in sterilizing hospital effluent through chlorine dioxide and the major influential factors on the number of fecal coliform and bacteria. [ Methods] Multi-factor orthogonal experiment in which such technological parameters as dosage of ClO2, effluent temperature, contact time, pH were regarded as factors affecting the experiment. Single-factor experiment was carried on sterilizing efficacy by ClO2 dosage of （2, 4, 6, 8, 10, 12 mg/L）, efflu ent temperature （10, 20 and 30%） and contact time （5, 10, 30, 60 and 90 min）. [Results] Sterilizing efficacy rose with the increase of ClO2 dosage, effluent temperature and the protraction of the contact time; the order of the primary and secondary factors influencing the treatment of hospital effluent with disinfectant chlorine dioxide was： ClO2 dosage, effluent temperature, contact time and pH value. Optimum parameters： ClO2 dosage 8-10 mg/L, sewage temperature 20% to 30%, the contact time was 30-60 min, the removal rate of total number of hospital sewage and fecal coliform bacteria reached 96%, impact of pH on the sterilizing effect of ClO2 was smaller, need not be considered. [Conclusion] Sterilization effect of chlorine dioxide disinfection on hospital sewage is good and reaches GB8978-1996 Sewage Discharge Standards.

关 键 词：二氧化氢 医院污水 ClO2投加量 污水温度 接触时间 

分 类 号：R123.6[医药卫生—环境卫生学]