岳好紧好湿夹太紧了好爽矜持,国产成人精品一区二三区在线观看,色窝窝无码一区二区三区成人网站,99久久久无码国产精品免费

Livestock farming

The livestock and poultry breeding industry has developed rapidly. At present, the chemical oxygen demand (COD) of livestock manure produced in China exceeds the sum of industrial wastewater and domestic sewage in China. The treatment of livestock and poultry wastewater is difficult, with high content of COD, SS, NH4+--N, good biodegradability, good sedimentation performance, large changes in water quality and quantity, and The characteristics of pathogenic bacteria and malodor, Amocos uses biological treatment technology to treat livestock and poultry wastewater, and all the indicators of effluent meet the "Emission Standards for Livestock and Poultry Industry Pollutants" (GB18596-2001).