进水方式对OAO蔬菜潜流湿地净化效果的影响  

Effect of Feeding Strategy on Purifying Performance of OAO Vegetable Subsurface‑flow Wetland

作　　者：巢波 张皓驰 陈太飞 李先宁[1] CHAO Bo;ZHANG Hao‑chi;CHEN Tai‑fei;LI Xian‑ning(School of Energy and Environment,Southeast University,Nanjing 210096,China)

机构地区：[1]东南大学能源与环境学院,江苏南京210096

出　　处：《中国给水排水》2024年第1期104-109,共6页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2017ZX07202004);江苏省环保科研课题(2016029)。

摘　　要：为提高好氧/厌氧/好氧(OAO)蔬菜潜流湿地对总氮的去除效果,同时维持其对有机物的高去除率,在野外条件下采用人工模拟的当地村落无序排放污水,分析不同进水方式(首端进水、三点进水和两点进水)对湿地去除污染物效果的影响。结果表明,相较于首端进水,三点进水方式下湿地对总氮的去除效果有所提高,但对COD和总磷去除率的提升效果不显著,最佳脱氮进水流量比为1∶2∶1,脱氮效果提升13.56%,氨氮、硝态氮和总氮去除率分别达到75.11%、95.07%和79.86%,相应出水平均浓度分别为0.65、0.53和1.32 mg/L。采用两点进水方式时,湿地脱氮除磷效率及COD去除率均高于三点进水和首端进水,最佳脱氮进水流量比为1∶3,氨氮、硝态氮和总氮去除率分别为82.10%、97.71%和85.59%,相应出水平均浓度分别为0.92、0.09和0.93 mg/L。This paper analyzed the effects of different feeding strategies(one‑point feeding,twopoint feeding and three‑point feeding)on the performance of wetlands for the removal of pollutant in simulated randomly‑discharged sewage from a village under field conditions,so as to improve the total nitrogen removal performance of aerobic/anaerobic/aerobic(OAO)vegetable subsurface‑flow wetland and maintain its high removal efficiency of organic matter.Compared with one‑point feeding strategy,the removal efficiency of total nitrogen in the wetland with three‑point feeding strategy was improved,whereas the removal efficiencies of COD and total phosphorus were not significantly improved.Under the optimal flow distribution ratio for nitrogen removal(1∶2∶1),the removal efficiency of total nitrogen increased by 13.56%,the removal rates of ammonia nitrogen,nitrate nitrogen and total nitrogen reached 75.11%,95.07%and 79.86%,respectively,and the corresponding average concentrations in effluent were 0.65 mg/L,0.53 mg/L and 1.32 mg/L,respectively.The nitrogen,phosphorus and COD removal rate of the wetland with two‑point feeding strategy were higher than those of the wetland with one‑point feeding and threepoint feeding strategies.The optimal flow distribution ratio for nitrogen removal was 1∶3,the removal rates of ammonia nitrogen,nitrate nitrogen and total nitrogen were 82.10%,97.71%and 85.59%,and the corresponding average concentrations in effluent were 0.92 mg/L,0.09 mg/L and 0.93 mg/L,respectively.

关 键 词：OAO蔬菜潜流湿地 村落无序排放污水 脱氮 三点进水 两点进水 

分 类 号：TU992[建筑科学—市政工程]