高效去除城市地表水污染物的生态过滤墙

IF 14 1区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Environmental Science and Ecotechnology Pub Date : 2024-03-26 DOI:10.1016/j.ese.2024.100418
Menglong Liao , Ye Qiu , Yan Tian , Zeng Li , Tongtong liu , Xinlei Feng , Guohong Liu , Yujie Feng
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引用次数: 0

摘要

城市地表水污染对水生生态系统和人类健康构成重大威胁。用于城市地表水的传统脱氮技术存在一些弊端,如碳源消耗大、污泥产量高,以及只关注溶解氧(DO)浓度而忽视溶解氧梯度的影响。在这里,我们展示了一种能去除城市地表水中污染物的生态过滤墙(EFW)。我们利用基于聚合物的三维基质来提高水的渗透性,并将挺水植物融入 EFW 以促进生物膜的形成。我们观察到,EFW 好氧区不同的曝气强度会产生不同的溶解氧梯度,最佳溶解氧控制在 3.19 ± 0.2 mg L-1 时,氮去除效率更高。具体来说,总有机碳、总氮、氨氮和硝酸盐的去除率分别为 79.4%、81.3%、99.6% 和 79.1%。在 3 mg L-1 DO 条件下进行的微生物群落分析表明,微生物的组成和丰度发生了变化,脱氯单胞菌属、醋氨单胞菌属、未分类___科罗马菌属、SM1A02 和假单胞菌属等在碳和氮的去除中发挥了关键作用。值得注意的是,EFW 促进了硝化-反硝化过程的快速进行,对脱氮做出了主要贡献。考虑到制造成本低、应用灵活、人工痕迹小以及良好的污染物去除能力,EFW 作为一种创新的城市地表水处理方法具有广阔的前景。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Ecological filter walls for efficient pollutant removal from urban surface water

Urban surface water pollution poses significant threats to aquatic ecosystems and human health. Conventional nitrogen removal technologies used in urban surface water exhibit drawbacks such as high consumption of carbon sources, high sludge production, and focus on dissolved oxygen (DO) concentration while neglecting the impact of DO gradients. Here, we show an ecological filter walls (EFW) that removes pollutants from urban surface water. We utilized a polymer-based three-dimensional matrix to enhance water permeability, and emergent plants were integrated into the EFW to facilitate biofilm formation. We observed that varying aeration intensities within the EFW's aerobic zone resulted in distinct DO gradients, with an optimal DO control at 3.19 ± 0.2 mg L−1 achieving superior nitrogen removal efficiencies. Specifically, the removal efficiencies of total organic carbon, total nitrogen, ammonia, and nitrate were 79.4%, 81.3%, 99.6%, and 79.1%, respectively. Microbial community analysis under a 3 mg L−1 DO condition revealed a shift in microbial composition and abundance, with genera such as Dechloromonas, Acinetobacter, unclassified_f__Comamonadaceae, SM1A02 and Pseudomonas playing pivotal roles in carbon and nitrogen elimination. Notably, the EFW facilitated shortcut nitrification-denitrification processes, predominantly contributing to nitrogen removal. Considering low manufacturing cost, flexible application, small artificial trace, and good pollutant removal ability, EFW has promising potential as an innovative approach to urban surface water treatment.

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来源期刊
CiteScore
20.40
自引率
6.30%
发文量
11
审稿时长
18 days
期刊介绍: Environmental Science & Ecotechnology (ESE) is an international, open-access journal publishing original research in environmental science, engineering, ecotechnology, and related fields. Authors publishing in ESE can immediately, permanently, and freely share their work. They have license options and retain copyright. Published by Elsevier, ESE is co-organized by the Chinese Society for Environmental Sciences, Harbin Institute of Technology, and the Chinese Research Academy of Environmental Sciences, under the supervision of the China Association for Science and Technology.
期刊最新文献
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