污水COD对氧总转移系数影响的研究  

Study on the effect of sewage COD on total oxygen transfer coefficient

作　　者：孙剑辉[1] 高健磊[2] 石岩 曹军 张建新 薛万新[1] 

机构地区：[1]河南师范大学化学与环境科学学院河南省环境污染控制重点实验室,河南新乡453007 [2]郑州大学环境与水利学院,河南郑州450002 [3]郑州市五龙口污水处理厂,河南郑州450051

出　　处：《工业水处理》2011年第11期31-33,共3页Industrial Water Treatment

基　　金：河南省重大公益性科研项目(081100910100);河南省基础与前沿技术研究项目(102300410098,092300410173)

摘　　要：以某城市污水处理厂的实际污水为试验对象,通过测量清水和不同COD污水中的氧总转移系数KLa和饱和溶解氧浓度Cs,研究了污水COD对KLa以及清污修正系数α和β的影响。结果表明:在水温为(23.5±1)℃、曝气量为1.0 m3/h、进水COD为200～550 mg/L的条件下,KLas随污水COD的升高而降低,平均变化率为-0.018%;α值随COD的增加而减小,平均值为0.48;β值随COD的增加变化不大,平均值为0.89。The sewage from a municipal wastewater treatment plant has been studied. The effect of its chemical oxygen demand （COD） on the total oxygen transfer coefficient K~ and the clean-up correction factor a and/3 is investigated, by measuring Kla and the saturated dissolved oxygen concentration （Cs） of fresh water and the sewage with different COD. The results show that when the water temperature is （23.51） ℃ ,aeration rate 1.0 m3/h and COD of the influent water 200-550 mg/L,KLas decreased with the increase of sewage COD,the average rate of variation is -0.018%. The a value decreases with the increase of sewage COD having an average value 0.48 ,while theβ value does not change much with the increase of sewage COD, having an average value 0.89.

关 键 词：化学需氧量 氧总转移系数 清污修正系数 生活污水 

分 类 号：X703[环境科学与工程—环境工程] X505