摘要
[目的]筛选适用于养猪废水的人工湿地优势物种.[方法]选取鸢尾、美人蕉、水芹、梭鱼草4 种水生植物,通过垂直流人工湿地装置,监测不同水力停留时间对污水中化学需氧量(COD)、总氮(TN)、总磷(TP)和氨氮(NH4+-N)浓度的影响,分析4 种水生植物对污水的净化效果.[结果]随着水力停留时间的延迟,人工湿地中废水中COD、TN、TP和NH4+-N的浓度逐渐下降,净化效果越好.当水力停留时间为5 d时,鸢尾对COD和NH4+-N的去除率最高,分别为 61.80%和 68.35%;梭鱼草对TN和TP 的去除率最高,分别为30.92%和81.53%.[结论]人工湿地对养猪废水净化效果以种植鸢尾和梭鱼草较佳.
Abstract
[Objective]To screen the dominant species in constructed wetlands suitable for application to swine wastewater.[Method]Four a-quatic plants including iris,canna,cress and pickerelweed were selected to monitor the effects of different hydraulic retention times on the con-centration of chemical oxygen demand(COD),total nitrogen(TN),total phosphorus(TP)and ammonia nitrogen(NH4+-N)in wastewater through a vertical flow constructed wetland device.The purification effect of the four aquatic plants on wastewater was analyzed.[Result]With the delay of hydraulic retention time,the concentrations of COD,TN,TP,and NH4+-N in wastewater in constructed wetlands gradually de-creased,and the purification effect improved.When the hydraulic retention time was 5 days,the removal rates of COD and NH4+-N by iris were the highest,which were 61.80%and 68.35%,respectively;the removal rates of TN and TP by pickerelweed were the highest,which were 30.92%and 81.53%,respectively.[Conclusion]The purification effect of constructed wetlands on pig wastewater was better by planting iris and pickerelweed.
基金项目
江西省水利厅科技成果重点推广计划项目(201820TG06)
江西省水利厅科技成果重点推广计划项目(201921TGKT06)
江西省水利厅科技成果重点推广计划项目(202123TGKT05)
维普
万方数据