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几年来,我国在污水灌田方面取得了很大的成绩。58年全国已有18个城市做到了有计划的利用污水灌溉农田,预计59年将会有更大的发展。污水灌田从城乡建设及经济意义看来有三大好处:第一,解决了工农业用水的矛盾,使一水二用发挥了更大的经济价值;第二,解决了农业上水源及肥源不足的困难,全国仅城市生活污水每年约有10亿吨,相当于10万吨的氮肥或50万吨的化学肥料;第三,解决了污水
In recent years, our country has made great achievements in sewage irrigation. In the past 58 years, 18 cities in the country have done a planned utilization of sewage-irrigated farmland and it is estimated that 59 years will see further development. Sewage and irrigated fields seem to have three major benefits from the urban and rural construction and economic significance: First, the contradiction between industrial and agricultural water is solved, so that one-water and two-purpose use have a greater economic value; secondly, the agricultural sources of water and fertilizers Inadequate difficulties, the national urban domestic sewage only about 1 billion tons per year, equivalent to 100,000 tons of nitrogen fertilizer or 500,000 tons of chemical fertilizers; Third, to solve the sewage