规模养猪粪污铜污染治理及循环利用

Treatment and Recycling of Copper Pollution from Pig Manure

养猪废弃物产量与日俱增,粪污中的铜易对周边环境造成潜在的威胁。为了防止规模养猪重金属铜迁移扩散导致更大范围的污染,先通过厌氧发酵装置对养猪粪污进行初步处理,再利用人工湿地富集沼液中的铜,利用铜富集植物吸收转移人工湿地中吸附的铜进行深度处理。人工湿地中种植几种生命力强,生长速度快且能富集铜的饲料作物,通过比较几种植物各部位以及根际土壤中铜的含量得出巨菌草和酸模是理想的治理养猪粪污铜污染的湿地植物。而富集铜的湿地植物作为饲料添加剂再应用于养殖业,通过饲喂生猪以实现资源循环利用,防止铜的迁移扩散产生更大范围的污染同时还能产生一定的经济效益。

The output of large-scale pig waste is increasing day by day,and the copper in fecal sewage is easy to pose a potential threat to the environment.In order to prevent a wider range of pollution caused by the migration and diffusion of heavy metal copper in large-scale pig breeding,the pig manure is preliminarily treated by anaerobic fermentation device,then the copper in biogas slurry is enriched by constructed wetland,and the copper enriched plants are used to absorb and transfer the copper adsorbed in Constructed Wetland for deep treatment.Several feed crops with strong vitality,fast growth speed and copper enrichment are planted in the wetland.By comparing the copper content in various parts of several plants and rhizosphere soil,it is concluded that giant fungus grass and Rumex are ideal wetland plants for controlling copper pollution from pig manure.The wetland plants enriched in copper are used as feed additives in the aquaculture industry to realize resource recycling by feeding pigs,prevent the migration and diffusion of copper from causing a wider range of pollution,and produce certain economic benefits.