固定化菌藻强化生物滞留池脱氮除磷效果  

Effect of immobilized bacteria and algae on enhanced nitrogen and phosphorus removal in bioretention tank

作　　者：王小平 陈曜 黄茹婷 陈众[3] WANG Xiaoping;CHEN Yao;HUANG Ruting;CHEN Zhong(Tongling Institute of Environmental Sciences;Tongling Environmental Monitoring Center;College of Resources and Environmental Engineering,Anhui University)

机构地区：[1]铜陵市环境保护科学研究所 [2]安徽省铜陵生态环境监测中心 [3]安徽大学资源与环境工程学院

出　　处：《环境工程技术学报》2023年第6期2117-2125,共9页Journal of Environmental Engineering Technology

基　　金：安徽省教育厅自然科学重点项目(KJ2020A0017)。

摘　　要：针对传统生物滞留池对氮磷去除效果较差的问题,开展固定化菌藻填料淋洗试验和不同配比固定化菌藻填料的生物滞留池脱氮除磷效果研究。将固定化菌藻填料在去离子水中连续淋洗,研究营养物的释放特征,同时分别设置固定化菌藻填料占填料层的2/5(G1组)和占填料层的4/5(G2组),分析其在不同淹没高度(0、30、60 cm)和落干期下的脱氮除磷效果。结果表明:固定化菌藻填料在前8次淋洗中,未检测出总磷(TP)、总氮(TN),菌藻经过固定化后适合作为生物滞留池填料的改良剂;生物滞留池对氨氮(NH_(3)-N)、TN的去除率随淹没高度的增加而提高,淹没高度为60 cm时,G1、G2组对NH_(3)-N的平均去除率分别为68.25%和72.00%,对TN的平均去除率分别为64.20%和68.70%;淹没高度分别为0和60 cm时,G1、G2组对TP的去除率分别为79.50%和78.00%、70.05%和71.00%,而淹没高度为30 cm时,G2组对TP的去除率最高,达86.00%;落干期从2 d延长至8 d时,NH_(3)-N和TN去除率分别从最高的69.38%和67.10%降至最低的55.13%和57.70%,对TP的去除率从最低的75.50%升至90.00%。固定化菌藻填料有效提高了生物滞留池脱氮除磷性能。In view of the poor nitrogen and phosphorus removal efficiency of the traditional bioretention tank,a study was carried out on the leaching test of immobilized bacteria algae packing,and the nitrogen and phosphorus removal efficiency of biological retention ponds with different proportions of immobilized bacteria algae packing.The characteristics of nutrient release were studied by continuous leaching of immobilized bacteria algae packing in deionized water.G1 group accounting for 2/5 of the filler layer and G2 group accounting for 4/5 of the filler layer were set up to study and analyze the nitrogen and phosphorus removal effects under different submergence heights(0,30,60 cm)and drying periods.The results showed that total phosphorus(TP)and total nitrogen(TN)were not detected in the first 8 times leaching of immobilized bacteria algae packing,and immobilized bacteria algae packing was suitable as the improver of bioretention tank packing.With the increase of submergence height,the removal rate of ammonia nitrogen(NH_(3)-N)and TN by bioretention tank increased.At the submergence height 60 cm,the average removal rates of NH_(3)-N in G1 and G2 groups were 68.25%and 72.00%,and the average removal rates of TN were 64.20%and 68.70%,respectively.At the submergence height 0 cm or 60 cm,the removal rates of TP in G1 and G2 groups were 79.50%and 78.00%,70.05%and 71.00%,respectively.At the submergence height 30 cm,the removal rate of TP in G2 group was the highest,reaching 86.00%.When the drying period was extended from 2 days to 8 days,the removal rate of NH_(3)-N and TN decreased from the highest of 69.38%and 67.10%to the lowest of 55.13%and 57.70%,respectively,while the removal rates of TP increased from the lowest of 75.50%to 90.00%.The test results showed that the immobilized bacteria and algae filler could effectively improve the nitrogen and phosphorus removal performance of bioretention tank.

关 键 词：固定化菌藻填料 生物滞留池 淹没高度 落干期 脱氮除磷 

分 类 号：X52[环境科学与工程—环境工程] TU992[建筑科学—市政工程]