利用城市生活污水灌溉农田,发展生产,改善卫生的试验研究工作,在北京市南苑人民公社右安门大队已经进行了五年。五年来,这个大队一直利用污水(其中包括一些小型的工厂废水,如印刷、印染、制酒等)灌溉菜田1,800亩,年年获得全面丰收。提高蔬菜产量10～60%。但是,开始试验时,由于污水是直接流入农田的,因此对于地下水源、土壤、作物均有污染情况,使土井不能再 The experiment and research work of using urban domestic sewage to irrigate farmland, develop production and improve sanitation has been carried out for five years in the You’anmen Brigade of Nanyuan People’s Commune in Beijing. Over the past five years, this brigade has irrigated 1,800 mu of vegetable fields with sewage (including some small-scale factory effluents such as printing, printing and dyeing, winemaking, etc.) and has achieved full harvests every year. Improve vegetable yield 10 ~ 60%. However, at the beginning of the experiment, as the sewage directly infiltrated the farmland, the groundwater sources, soil and crops were contaminated so that the soil well could no longer be