摘要
淤泥是水体活性污泥和径流泥沙的絮聚体,结构良好,含丰富有机质、N、P、K、微量元素和生物活性物质等,是良好资源,可返回到陆地培肥改良土壤。逆地球化学过程让淤泥回到陆地,可减弱水体内源释放,又可利用淤泥资源,减少化肥用量,还可解决淤泥堆放处置难题,治理污染,改善环境。但淤泥同时含有重金属、有机污染物和致病菌(虫)等,限制着淤泥回地使用。因此,要谨慎、分别地将淤泥回地。
Silt is active sludge and flocculant polymers of water runoff and sediment. It is well structured, rich in organic matter, N, P, K, and the trace elements of biological active substances. It is a good resource and can return to the land as fertilizer to improve soil fertility. Inverse geochemical process for returning silt back to the land can reduce endogenous release in the waterbody, utilize silt resources, and reduce the dosage of chemical fertilizer. It can solve silt pile disposal problem, pollution control, and improve the environment. Sludge contains heavy metals, organic pollutants and pathogens, leading to its limited use. Therefore, silt must be prudently returned back to the land.
出处
《湖北农业科学》
2015年第6期1286-1288,共3页
Hubei Agricultural Sciences
基金
江西省自然科学基金项目(20132BAB204014)
国家科技支撑计划项目(2015BAD23B03)
江西省农业科学院创新基金博士启动项目(2012CBS009)
关键词
淤泥
淤泥回地
环境污染
地球化学过程
silt
silt back to the land
environmental pollution
geochemical process
