水力负荷率和基质对潮汐流人工湿地处理黑臭水体中氨氮去除的影响。
Effects of hydraulic loading rate and substrate on ammonium removal in tidal flow constructed wetlands treating black and odorous water bodies.
机构信息
CAS Key Laboratory of Mineralogy and Metallogeny, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, 511 Kehua Street, 510640 Guangzhou, China; Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, 511 Kehua Street, 510640 Guangzhou, China; University of Chinese Academy of Sciences, 19 Yuquan Road, 100049 Beijing, China.
CAS Key Laboratory of Mineralogy and Metallogeny, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, 511 Kehua Street, 510640 Guangzhou, China; Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, 511 Kehua Street, 510640 Guangzhou, China.
出版信息
Bioresour Technol. 2021 Feb;321:124468. doi: 10.1016/j.biortech.2020.124468. Epub 2020 Dec 1.
The efficient removal of ammonium nitrogen (NH-N) is vital to eliminating black and odorous water bodies. In this work, tidal flow constructed wetlands with gravel (TFCW-G) and with a mixture of zeolite and gravel (TFCW-Z) were set up to treat black and odorous water bodies at different hydraulic loading rates (HLRs). Results showed that zeolite significantly enhanced nitrogen removal, and the maximum NH-N removal efficiency of 96.69% was achieved in TFCW-Z at HLR of 3 m·d with a flooding and drying cycle of 2 h. Zeolite addition changed the microbial community structure and the abundance of nitrification genes. Comammox Nitrospira was the only enriched strain accounting for NH-N removal in TFCW-G, while the co-occurrence of comammox Nitrospira and the canonical and potential ammonia-oxidizing bacteria were identified in TFCW-Z. Summarily, high performance, together with low footprint and low maintenance cost, are characteristics that make the TFCW-Z a promising and competitive alternative.
高效去除氨氮（NH-N）对于消除黑臭水体至关重要。本研究采用砾石潮汐流湿地（TFCW-G）和沸石与砾石混合物潮汐流湿地（TFCW-Z）处理不同水力负荷（HLR）的黑臭水体。结果表明，沸石显著提高了氮的去除效果，在 HLR 为 3 m·d-1、淹水和排水周期为 2 h 的条件下，TFCW-Z 中 NH-N 的最大去除效率达到 96.69%。沸石的添加改变了微生物群落结构和硝化基因的丰度。在 TFCW-G 中，仅有 Comammox Nitrospira 被富集并用于去除 NH-N，而在 TFCW-Z 中则鉴定出 Comammox Nitrospira 与经典和潜在氨氧化细菌的共现。总之，TFCW-Z 具有高效、占地面积小、维护成本低等特点，是一种很有前途和竞争力的替代方案。
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