高氨氮养猪场废水治理工程实践研究

Study on Treatment of Highly Concentrated Ammonia-nitrogen Wastewater from a Hoggery

以畜禽养殖废水综合治理为目的,结合某养殖有限责任公司治理工程实践,采用干清粪工艺,将收集的猪粪和固液分离后的粪渣等加工成有机肥料,猪尿及冲洗水通过污水处理系统后达标排放,厌氧产生的沼气通过净化脱硫后用于养猪场内沼气发电机组发电。处理后水质:COD<100 mg/l,BOD5<20 mg/l,SS<70 mg/l,NH3-N<15 mg/l,TP<0.5 mg/l,达到《污水综合排放标准》(GB 8987-1996)的一级排放标准,严于《畜禽养殖业污染物排放标准》(GB 18596-2001);工程运行稳定,资源效益、社会效益显著。

For the purpose of comprehensive management in livestock wastewater,this study takes the management engineering practice in a livestock farm from Zhejiang province as example. The swine manure and wastes after solid- liquid separation was collected to produced organic fertilizer by using dry manure removal process. The swine urine and wash wastewater were discharged after reaching corresponding standard through the sewage treatment system. Biogas produced by the anaerobic fermentation was used to generate electricity. The water quality after treatment can reach: CODcr< 100 mg / L,BOD5< 20 mg / L,SS < 70 mg / L,NH3- N < 15 mg / L,TP < 0. 5 mg / l,All indexes can reach the'Integrated Wastewater Discharge Standard'of GB 8978- 1996,which is superior to'Livestock and Poultry Breeding Industry Pollutant Discharge Standards'of GB 18596- 2001. The engineering operation is stable and has significant benefits in resource recycling.