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石家庄污灌区总面积为170.02平方公里,折合耕地254,723亩,其中市郊污灌面积为42,696亩,约占市郊区耕地面积的27.22%。污水灌溉在国外,早在19世纪后期随着科学事业的发展得到广泛的应用。污灌面积逐年扩大。日本已开始将处理后的污水用于工业冷却、洗涤和农业。并认为由于农田只用化肥,使土壤贫瘠蜕化,因此对污水污泥用于农田,引起重视,倾向于处理无害后用于农田。我国污灌事业从1959年开始,污灌面积不断扩大,目前估计在500万亩以上。
Shijiazhuang sewage irrigation area with a total area of 170.02 square kilometers, equivalent to 254,723 acres of arable land, of which suburban sewage irrigation area of 42,696 acres, accounting for about 27.22% of the suburban area of arable land. Sewage irrigation in foreign countries, as early as the late 19th century with the development of science has been widely used. Sewage irrigation area has expanded each year. Japan has begun to treat treated sewage for industrial cooling, washing and agriculture. And because the farmland only use chemical fertilizers, so that poor soil degeneration, so the sewage sludge for farmland, attracting attention, tend to deal with harmless after use for farmland. Since 1959, China’s sewage irrigation business has been expanding its sewage irrigation area, currently estimated at more than 5 million mu.