美人蕉和菖蒲人工湿地植物组合对高浓度畜禽废水的处理效果研究

Treatment Effect of Canna Iindica L.and Acorus Calamus Combination on Livestock Wastewater

选用美人蕉和菖蒲作为供试植物组合应用于人工湿地中。在自然条件下,通过模拟人工湿地,采用序批式进水方式,研究美人蕉＋菖蒲人工湿地对高浓度畜禽废水的处理效果。结果表明,在畜禽废水进水浓度CODcr、TP和NH3-N分别为1 176~2 365mg/L,22~71mg/L,99~180mg/L,美人蕉＋菖蒲人工湿地去除率分别达到了54%~86%,66%~87%和45%~78%。随着进水次数的增多,该人工湿地对畜禽废水中的CODcr、TP和NH3-N去除率呈递减趋势,第一次进水去除率分别为88%,87%和73%;第二次进水去除率分别为80%,62%和78%;第三次进水去除率76%,66%和68%;第四次进水去除率分别为77%,72%和45%。与其他湿地植物在处理高畜禽废水的效果相比,美人蕉＋菖蒲的湿地植物组合表现良好。

Canna indica L. and Acorus calamus were selected as experimental plants in simulating wet- lands. Under natural conditions, the study simulated the constructed wetlands, researched the treatment effect of the wetland on high concentration livestock wastewater using four times batch-sequential test method. The results showed that the average removal rates of the wetland plants combination to CODcr, TP and NH3-N from livestock wastewater reached 54~86% ,66~87% and 45~78%, respectively when concentration of CODcr was 1176~2365 mg/L, TP, 22~71 rag/L, and NH3-N, 99~180 mg/L. With the increase of influent times, the removal rates of the wetlands to CODcr,TP and NH3-N decreased progres- sively and some of acorus calamus plant withered in the third inflowing, the Combination of canna indica L. and Acorus calamus perfomed better treatment efficiency compared with that of other plants for high concentration livestock wastewater.