摘要
采用污泥田间小区试验及污泥渗漏试验的方法,开展了沈阳北部污水处理厂污泥土地利用可行性研究。结果表明,沈阳北部污水处理厂污泥中N、P、K养分含量丰富,污泥中的Cd元素是污泥土地利用的主要限制因素。通过污泥土地利用限制因素法,确定了沈阳北部污水处理厂污泥总施用量为45t·hm^(-2)。污泥渗漏、田间试验结果表明,只要污泥总施用量控制在45t·hm^(-2),NO_3-N不会对地下水构成污染危害,土壤中的重金属含量也不会超过二级土壤环境质量标准,污泥可安全地进行土地利用。
The application of sewage sludge on soil has been widely spread in agricultural areas. Land application of sewage sludge shows an increasing tendency for the disposal and utilization of urban sewage sludge. The study on feasibility for land application of sewage sludge from Shenyang Wastewater Treatment Plant （SWTP） was carried out by using field plot experiments and leakage facilities. The data demonstrated that the contents of N, P and K in sewage sludge are rich, up to 2.24%, 1.51% and 0.82% respectively. Cd element is a main restrictive factor of sewage sludge application for agricultural use. The content of Cd （5.035 mg.kg-1） in sewage sludge from AWTP approaches the control standard, 5 mg.kg-1 （GB4284-84）, therefore it can be considered for agricultural use by means of total amount control. The application amount of sewage sludge is 45 t·hm^-2 calculated by the method of ＂restricting factors of land use＂. The leaching and field experiment results show that if total amount of sewage sludge is controlled at 45 t·hm^-2, the NO3-N does not confer groundwater pollution and th heavy metal contents do not exceed the Secondary Standard of Environmental Quality in Soils. The sewage sludge can be safely applied to land according to the controlled manners.
出处
《农业环境科学学报》
CAS
CSCD
北大核心
2007年第4期1543-1546,共4页
Journal of Agro-Environment Science
基金
中国科学院"百人计划"项目
中国科学院沈阳应用生态所领域前沿项目
中国科学院沈阳应用生态所陆地生态过程重点实验室资助项目
关键词
污泥
土地利用
沈阳
污水处理厂
sewage sludge
land application
Shenyang
wastewater treatment plant
