自20世纪50年代，发达国家开始大规模地集约化养殖，在城镇郊区建立一大批规模化畜禽养殖场。但由于每天大量畜禽粪便及污水产生，难以贮存、处理和利用，因而造成了严重的环境污染。20世纪60年代，日本用“畜产公害”高度概括了这一问题的严重性，与此同时许多发达国家迅速采 Since the 1950s, developed countries started large-scale intensive aquaculture and established a large number of large-scale livestock and poultry farms on the outskirts of cities and towns. However, due to the large amount of livestock excrement and sewage produced each day, it is difficult to store, treat and utilize it, resulting in serious environmental pollution. In the 1960s, Japan highly summarized the seriousness of this issue with “nuisance of livestock products,” while at the same time many developed countries rapidly adopted