规模化肉鸭场污水污染物排放及其影响分析

Pollutants Emission in Wastewater of Scale Duck Farm and Its Impact Analysis?

为了解规模化肉鸭场污水污染物排放及其对水环境污染现状,本试验选择河南省5个有代表性的规模化肉鸭场,对其所排放污水以及附近水体中的化学需氧量(COD)、五日生化需氧量(BOD5)、氨氮(NH3-N)、总磷(TP)、悬浮物(SS)等污染物含量进行了分析,并利用单因子污染指数法对其污染程度进行评价。结果表明:鸭场排放污水中COD、BOD5、NH3-N、TP、SS的平均含量均超出《畜禽养殖业污染物排放标准》。其中COD、BOD5、NH3-N、TP属于较严重污染,而SS属于严重污染。鸭场下游水体中COD、BOD5、NH3-N、TP的平均含量均高出《地表水环境质量标准》,其中COD、BOD5、TP污染较严重,而NH3-N为严重污染。因此,规模化肉鸭场污水排放污染物指标全部超标,并且排放的污水对周围水环境造成不同程度的污染。

The content of chemical oxygen demand （COD）, five days＇ biochemical demand （BOD5）,ammonia nitrogem （NH3-N） ,total phosphorus （TP）,suspended solids （SS）in the wastewater from five representative scale duck farms and the water bodies around these farms in Henan Province were analysed the status of pollutant discharge in wastewater and water bodies pollution around the duck farms. The single-factor pollution index method was used to evaluate the pollution level. The result showed that the mean content of COD, BOD5, NH3-N, TP, SS in wastewater exceeded Discharge standard of pollution in livestock and poultry industry. COD,BOD5,NH3-N,TP belonged to more serious pollution. SS belonged to most serious pollution. The results also showed that the mean content of COD, BOD5, NH3-N,TP, SS in the downstream water bodies of duck farms exceeded Standard of the national groundwater environmental quality. COD, BOD5, TP belonged to more serous pollution, and NH3-N belonged to most serous pollution. Therefore, all pollutant discharge index in large-scale duck farms were beyond standard index;and water environment around the farms was also inordinately polluted by the wastewater.