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天津市农民早在二十年前就已利用污水污泥培肥农田,不过当时面积小,经验少.解放后党对污水利用十分重视,灌溉面积日益扩大.尤其是1958年海河改建后把市区污水排至郊区为郊区农田灌溉污水创造了极为方便的条件.据1961年调查郊区污水灌溉面积已发展到10万亩,其中稻田占3.6亩.
As early as 20 years ago, Tianjin farmers had used sewage sludge to cultivate farmland, but at that time, they were small in size and had little experience. After the liberation, the party attached great importance to wastewater utilization and irrigated area was expanding. Especially after the reconstruction of Haihe River in 1958, District sewage discharged to the suburbs for suburban irrigation of farmland to create a very convenient conditions.According to the 1961 survey of suburban sewage irrigation area has been developed to 100,000 mu, of which 3.6 acres of paddy fields.