饲料植物处理猪场厌氧废液的效果研究

Forage Planting System for Treatment of Anaerobically Digested Piggery Wastewater

本文研究了基于饲料植物空心菜、水稻和水葫芦3种不同植物处理体系下的猪场厌氧废液的水质指标变化规律。结果表明,饲料植物处理体系对猪场厌氧废液处理至第15天时,水质指标有很大改善,处理效果稳定。各处理体系对COD的去除率为46.4%-54.5%,对NH4＋^-N的去除率为79.0%-90.7%,对TN的去除率为43.1%-78.3%,对TP的去除率为79.3%-87.8%。试验还表明,不同处理体系对厌氧废液COD,NH4＋^-N,TN,TP,pH的处理效果各有差异,对COD,NH4＋^-N,TP的处理效果,水葫芦体系表现最好,pH变化幅度也是水葫芦体系最大,而对TN的处理效果,对照体系优于其它处理体系,可能是对照系统中出现了藻类的生长所致。

Effluent from anaerobic digester of piggery wastewater was treated in three forage planting systems, named water spinach, paddy and water hyacinth respectively, and the water quality were monitored. It showed that the water quality improved significantly after 15 days of treatment in different forage planting system. The remove rates of COD, NH4＋^-N, TN and TP were 46.4% - 54.5% , 79.0% - 90.7% , 43. 1% - 78.3% and 79.3% - 87.8% respectively. And different system had different effect on the pollutant removal. Water hyacinth system showed the best treatment effect on COD, NH4＋^-N, and TP removal, but it had a wider range of pH change. The control treatment had a best removal for TN because of the alga grown unexpectly.