强化 A/O 反应池式规模化复合人工湿地对原生活污水的处理性能。
Enhanced performance of pilot-scale hybrid constructed wetlands with A/O reactor in raw domestic sewage treatment.
机构信息
Department of Ecology, Jinan University, Guangzhou, 510632, China.
Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China.
出版信息
J Environ Manage. 2020 Mar 15;258:110026. doi: 10.1016/j.jenvman.2019.110026. Epub 2020 Jan 7.
The aim of this study was to improve the nutrient removal efficiency by optimizing aeration time, hydraulic loading rate (HLR) and combination type in hybrid constructed wetlands (HCWs) with anoxic/oxic (A/O) reactor. The results showed that, the highest removal percentages of TN, NH-N, TP, PO-P and COD were 87.9%, 98.1%, 86.1%, 85.3% and 95.2%, respectively, in horizontal subsurface flow (HF) - surface flow - vertical subsurface flow CW with A/O reactor at 0.1 m/d HLR and 2 h aeration. HLR, aeration time and combination type had a significant impact on the removal of nutrients, though plant diversity did not have any significant influence. Presence of the A/O reactor improved the removal of TN in the HCWs by reducing influent loading and changing influent characteristics, thereby affecting the role of nitrification, anammox, and denitrification processes. The anammox process was the dominant pathway in the 1 HF CWs during the aeration period, where the highest removal of phosphorus was observed.
本研究旨在通过优化曝气时间、水力负荷率（HLR）和缺氧/好氧（A/O）反应器的组合方式，提高混合人工湿地（HCWs）的养分去除效率。结果表明，在 HLR 为 0.1 m/d 和曝气时间为 2 h 的条件下，采用缺氧/好氧（A/O）反应器的水平潜流（HF）-表面流-垂直潜流 CW 对 TN、NH-N、TP、PO-P 和 COD 的去除率最高，分别为 87.9%、98.1%、86.1%、85.3%和 95.2%。HLR、曝气时间和组合方式对养分的去除有显著影响，而植物多样性没有显著影响。A/O 反应器的存在通过降低进水负荷和改变进水特性，从而影响硝化、厌氧氨氧化和反硝化过程的作用，提高了 HCWs 中 TN 的去除率。在曝气阶段，1 个 HF CWs 中以厌氧氨氧化过程为主导，磷的去除率最高。
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