【摘要】 针对低温条件下人工湿地系统中微生物活性下降,导致处理效果明显下降的问题,进行了低温人工湿地生物强化试验研究。在低温4℃条件下进行复合菌剂制备并投加入潜流人工湿地中进行生物强化。结果表明:脱氮菌剂构建实验中,复配比例为氨化菌∶亚硝化菌∶硝化菌∶反硝化菌=2∶3∶1∶2时氨氮及总氮降解效率最佳,去除率分别为16.59%和17.86%。复合菌剂构建实验中,除碳菌和脱氮菌剂体积比为4∶1氨氮、总氮的去除率两方面来看效果最佳,去除率分别为21.34%,18.59%。应用于潜流低温人工湿地模拟装置中,可使氨氮去除率提高5.78%,总氮去除率提高7.69%,并且总氮出水达到一级A标准。但投加10 d后各指标出水浓度均上升,因此需以10 d为周期反复投加。更多还原

【Abstract】 In view of the problem that the microbial activity and quantity of constructed wetland system decrease under low temperature, which can lead to the decrease of pollutant removal efficiency, the biological enhancement method was adopted to improve the treatment efficiency of constructed wetland with low temperature subsurface flow. The dominant strains were purified and compounded at low temperature, and then constructed into compound bacterial agent to add into subsurface constructed wetland for biological enhancement. The results showed that ammonia nitrogen and total nitrogen degradation efficiency were the best when the ratio of ammonia bacteria to nitrite bacteria to nitrifying bacteria to denitrifying bacteria was 2∶3∶1∶2, the removal rates were 16.59% and 17.86%, respectively. In the construction experiment of composite microbial agents, the removal rates of COD, ammonia and total nitrogen were the best when the volume ratio of carbon removal bacteria to nitrogen removal bacteria was 4∶1. The removal rates were 28.81%, 21.34% and 18.59%, respectively. The COD removal rate, ammonia nitrogen removal rate and total nitrogen removal rate were increased by 4.06%, 5.78% and 7.69% respectively, and the total nitrogen in the effluent met the first A standard. But after 10 days, the effluent concentration of each index increased, so it need be repeatedly added for every 10 days.更多还原