冬春两季表流人工湿地-氧化塘交替组合氮磷去除效果研究
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摘要
针对人工湿地冬春两季对尾水中氮磷的去除效果较差的弱点,为达到湿地处理系统全年水质目标,构建了表流人工湿地-氧化塘交替系统,以某污水处理厂尾水为处理对象,研究冬春两季该湿地系统对尾水氮磷的去除效果。结果表明:氧化塘对TN和氨氮的去除效果优于表流人工湿地,两者的间隔使用,有效的改善了冬春两季氮磷的去除情况。冬春两季对TN的去除率范围分别为30%～54%、55%～66%;对氨氮的去除率范围分别为33%～55%、75%～82%;对硝态氮的去除率范围分别为21%～47%、49%～58%;对TP的去除率范围分别为50%～69%、64%～69%。表流人工湿地与氧化塘的交替组合,一定程度上弥补了单纯表流湿地冬春季存在的弱点,从而对尾水处理取得更好的效果。
Aiming at the weak point of nitrogen and phosphorus removal in the tail water in the winter and spring of the constructed wetland, in order to achieve the annual water quality target of the wetland treatment system, this paper constructed the surface flow artificial wetland-oxidation pond alternate system, taking the tail water of a sewage treatment plant as the object, the effect of the wetland system on the removal of nitrogen and phosphorus in the tail water was studied in winter and spring. The results showed that the removal effect of TN and ammonia nitrogen in oxidation pond is better than that in surface flow constructed wetland. The removal of nitrogen and phosphorus in winter and spring can be effectively improved by alternating combination of them. The removal rate of TN in winter and spring is 30%～54%, 55%～66%, respectively. The removal rate of ammonia nitrogen is 33%～55%, 75%～82%, respectively. The removal rate of nitrate nitrogen is 21%～47%, 49%～58%, respectively, and the removal rate of TP is 50%～69%, 64%～69%, respectively. The alternating combination of surface wetland and oxidized pond compensates for the weakness of the single wetland in winter and spring, and thus achieves better effect for tail water treatment.
Aiming at the weak point of nitrogen and phosphorus removal in the tail water in the winter and spring of the constructed wetland, in order to achieve the annual water quality target of the wetland treatment system, this paper constructed the surface flow artificial wetland-oxidation pond alternate system, taking the tail water of a sewage treatment plant as the object, the effect of the wetland system on the removal of nitrogen and phosphorus in the tail water was studied in winter and spring. The results showed that the removal effect of TN and ammonia nitrogen in oxidation pond is better than that in surface flow constructed wetland. The removal of nitrogen and phosphorus in winter and spring can be effectively improved by alternating combination of them. The removal rate of TN in winter and spring is 30%～54%, 55%～66%, respectively. The removal rate of ammonia nitrogen is 33%～55%, 75%～82%, respectively. The removal rate of nitrate nitrogen is 21%～47%, 49%～58%, respectively, and the removal rate of TP is 50%～69%, 64%～69%, respectively. The alternating combination of surface wetland and oxidized pond compensates for the weakness of the single wetland in winter and spring, and thus achieves better effect for tail water treatment.
引文
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[20] 陈雯,杨波,汪诚文. 深圳市布吉污水处理厂构建人工湿地试验研究[J]. 水资源保护,2010,26(5):67-81.
[2] Weerakoona G M,Jinadasaa K B,Herath G B,et al. Impact of the hydraulic loading rate on pollutants removal in tropical horizontal subsurface flow constructed wetlands[J].Ecological Engineering,2013,61:154-160.
[3] 范远红,崔理华,林运通,等. 不同水生植物类型表面流人工湿地系统对污水厂尾水深度处理效果[J]. 环境工程学报,2016,10(6):2875-2881.
[4] 梁康,常军军,王飞华,等. 垂直流人工湿地对尾水的净化效果及最佳水力负荷[J]. 湖泊科学,2016,28(1):114-123.
[5] 沈林亚,吴娟,钟非,等. 分级进水对阶梯垂直流人工湿地污水处理效果的影响[J]. 湖泊科学,2017,29(5):1084-1090.
[6] 汪楚乔,陈艳红,吴磊,等. 冬季组合工艺处理灌溉尾水的运行效果[J]. 环境工程学报,2016,10(6):3339-3344.
[7] 于晓霞,庄涛,刘阳,等. 污水厂尾水净化人工湿地冬季强化脱氮中试研究[A]. 第九届全国河湖治理与水生态文明发展论坛论文集[C],2017:165-172.
[8] 许丹,肖恩荣,徐栋,等. 微生物燃料电池与人工湿地耦合系统研究进展[J]. 化工学报,2015,66(7):2370-2376.
[9] He Y,Wang Y,Song X. High-effective denitrification of low C/N wastewater by combined constructed wetland and biofilm-electrode reactor (CW-BER)[J]. Bioresource Technology,2016:203-245.
[10] 周卿伟,梁银秀,阎百兴,等. 冷季不同植物人工湿地处理生活污水的工程实例分析[J]. 湖泊科学,2018,30(1):130-138.
[11] 周帆,杨卫权. 季节性间歇曝气式串联氧化塘系统的可行性研究[J]. 华东交通大学学报,1989,(2):30-39.
[12] Agudelo C, Jaramillo M L, Penuela G. Comparison of the removal of chlorpyrifos and dissolved organic carbon in horizontal sub-surface and surface flow wetlands[J]. Science of the Total Environment,2012,431(1):271-277.
[13] Fan J L, Wang W G, Zhang B, et al. Nitrogen removal in intermittently aerated vertical flow constructed wetlands: Impact of influent COD/N ratios[J]. Bioresource Technology,2013,143(1):461-466.
[14] 王玮,丁怡,王宇晖,等. 人工湿地增氧技术在污水脱氮中的应用[J]. 工业水处理,2014,34(8):1-5.
[15] Ding Yi,Wang Wei,Song Xinshan,et al. Spatial distribution characteristics of environmental parameters and nitrogenous compounds in horizontal subsurface flow constructed wetland treating high nitrogen-content wastewater[J]. Ecological Engineering,2014,70:446-449.
[16] Ye Jianfeng,Wang Liang,Li Dan,et al. Vertical oxygen distribution trend and oxygen source analysis for vertical-flow constructed wetlands treating domestic wastewater[J]. Ecological Engineering,2012,41:8-12.
[17] 卢少勇,金相灿,余刚. 人工湿地的氮去除机理[J]. 生态学报,2006,26(8): 2670-2677.
[18] Nicola J C. Field studies of enhanced phosphorus removal from constructed wetland effluents[R]. Kingston,Ontario,Canada,2002.
[19] 蒋永荣,莫德清,段钧元,等. 不同植物配置人工湿地冬季生活污水净化效果比较[J]. 水资源保护,2009,25(3):25-28.
[20] 陈雯,杨波,汪诚文. 深圳市布吉污水处理厂构建人工湿地试验研究[J]. 水资源保护,2010,26(5):67-81.