养狐场污水中主要污染物检测

Detection of the principal pollutants in the sewage from fox farms

为了查清规模化养狐场排出的污水对环境的影响,试验分别采用重铬酸钾法、稀释接种法、重量法、钠氏试剂分光光度法、钼锑抗分光光度法检测2家养狐场污水中化学需氧量(COD)、五日生化需氧量(BOD5)、悬浮物(SS)、总磷(T-P)、氨氮(NH3-N)的含量。结果表明:养狐场排放出的污水中COD、BOD5、SS、T-P、NH3-N的浓度严重超出《畜禽养殖业污染物排放标准》(GB 18596—2001)规定的养殖业水污染物最高允许日排放浓度。山东省潍坊市某水貂狐良种场排放污水中COD、BOD5、SS、T-P、NH3-N浓度分别是标准值的6.18倍、6.20倍、8.05倍、8.13倍、1.31倍,黑龙江省哈尔滨市某养殖场排放污水中COD、BOD5、SS、T-P、NH3-N浓度分别是标准值的18.28倍、13.13倍、29.8倍、20.13倍、3.51倍。

To find out the effects of the sewage from large -scale fox farms on the environment, The potassium dichromate method, dilution inoculation method, gravimetrie method, Nessler＇ s reagent spectrophotometric method and molybdenum - antimony anti spectrophotometfie method were used to detect he contents of chemical oxygen demand （COD） , five - day biochemical oxygen demand （ BOD5 ） , suspended solids （SS） , total phosphorus （ T - P） and ammonia nitrogen （ NH3 - N） in the sewage from two fox farms, respectively. The results showed that the concentrations of COD, BOD5, SS, T- P and NH3 -N in the sewage from the two fox farms, highly exceeded the maximum daily discharge concentration for water pollutants which was allowed by 《 Discharge standard of pollutants for livestock and poultry breeding》 （ GB 18596- 2001 ）. The concentrations of COD, BOD5 , SS, T - P and NH3 - N in the sewage from Weifang Yuxin mink fox breeding farm were 6.18, 6.20, 8.05, 8.13 and 1.31 times of the standard value, respectively; and the concentrations in Harbin Yuxuan farm were 18.28, 13.13, 29.8, 20.13 and 3.51 times of the standard value.