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当前位置: 首页 > 文章 > 无回流生物滤床净化槽脱氮效果的研究 农业环境科学学报 2018 (02) 316-322
Position: Home > Articles > Study on nitrogen removal effect of non-circumfluence bio-filter purifying tank Journal of Agro-Environment Science 2018 (02) 316-322

无回流生物滤床净化槽脱氮效果的研究

作  者：
王昶;胡洁;王耀琛;马越凡;曾明;李丽
单  位：
天津科技大学海洋与环境学院
关键词：
生活污水;净化槽;生物滤床;A/O/A/O工艺;分段进水;脱氮
摘  要：
构建一种脱氮的无回流生物滤床家庭生活污水处理一体化净化槽,研究其处理效果;改变各区内的曝气形式,形成A/O/A/O的脱氮工艺,通过测定各区COD、NH+4-N、NO-3-N和TN的浓度变化,考察其处理效果。结果表明:随着净化槽各区生物滤床的加入,反应器抗冲击性增强,处理效果明显提高。但A/O/A/O系统中第二级厌氧过程因碳源不足,脱氮效果不佳,改用分段进水后,净化槽不仅运行稳定,而且取得了很好的处理效果,出水COD平均浓度12.3 mg·L~(-1),NH+4-N平均浓度2.7 mg·L~(-1),TN平均浓度13.0mg·L~(-1),均达到国标(GB 18918—2002)一级A标准。A/O/A/O生物滤床新型净化槽不仅在结构上形成一体化,而且由于生物滤床的使用,不需要污泥回流,节省能耗,通过分段进水可以实现过程脱氮。
译  名：
Study on nitrogen removal effect of non-circumfluence bio-filter purifying tank
作  者：
WANG Chang;HU Jie;WANG Yao-chen;MA Yue-fan;ZENG Ming;LI Li;College of Marine and Environmental Sciences, Tianjin University of Science & Technology;
关键词：
domestic sewage;;purifying tank;;bio-filter;;A/O/A/O process;;step-feed;;nitrogen removal
摘  要：
A non-circumfluence multi-functional integrated bio-filter purifying tank was developed to study the removal performance of ni-trogen and chemical oxygen demand(COD)in rural domestic sewage. The influence of support media on pollutant biodegradation was investigated by adding support media in each zone in a stepwise manner. Subsequently, the aeration condition was changed to anaerobic/oxide/anoxic/oxide(A/O/A/O)mode and variations of COD, NH+4-N, NO-3-N, and total nitrogen(TN)concentrations in each zone were detected.Stable effluent quality and good resistance to shock-loading were achieved in the purifying tank when the support media were employed. In the A/O/A/O system, the denitrification efficiency was unsatisfactory because of the lack of carbon source in the second anoxic stage. However, when the step-feed strategy was adopted, the treating performance of the purifying tank became stable and afforded highly efficient nitrogen removal. Specifically, the average effluent concentration of COD, NH+4-N, and TN reached 12.3, 2.7 mg·L~(-1) and 13.0 mg·L~(-1), respectively, which satisfies the national primary A of discharge standard(GB 18918—2002). Overall, the purifying tank with the A/O/A/O operation mode not only performed as a compact reactor to remove nitrogen by step-feed, but also avoided the recirculation of sludge by employing the bio-filter and saved energy costs.

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