近年来,畜牧业的快速发展一方面为发展农村经济、提高城乡居民生活水平做出了重大贡献,另一方面也带来了规模化养殖场粪便排放量急剧增长的环保问题。这些粪便污水日积月累在城市乡村周边地带形成了庞大的污染源,造成了较严重的环境污染, In recent years, the rapid development of animal husbandry has made a significant contribution to the development of the rural economy and the living standards of both urban and rural residents. On the other hand, it has brought about an environmental problem of dramatic increase in excrement discharge from large-scale farms. These excrement and sewage accumulate over a long period of time in the urban and rural areas around the formation of a huge source of pollution, resulting in more serious environmental pollution,