[1] Huang Juan, Wei Zhihui, Ji Xiaoyu, Yan Chunni, et al. Enhancement of wastewater treatment performancein constructed wetlands by calcium-modified basalt fiber [J]. Journal of Southeast University (English Edition), 2023, 39 (2): 115-126. [doi:10.3969/j.issn.1003-7985.2023.02.002]

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Enhancement of wastewater treatment performancein constructed wetlands by calcium-modified basalt fiber()

钙改性玄武岩纤维对人工湿地污水处理性能的提升

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

39

Issue:

2023 2

Page:

115-126

Research Field:

Environmental Science and Engineering

Publishing date:

2023-06-20

Info

Title:

Enhancement of wastewater treatment performancein constructed wetlands by calcium-modified basalt fiber

钙改性玄武岩纤维对人工湿地污水处理性能的提升

Author(s):

Huang Juan;  Wei Zhihui;  Ji Xiaoyu;  Yan Chunni;  Ma Yixuan;  Qian Xiuwen

School of Civil Engineering, Southeast University, Nanjing 211189, China

黄娟;  魏智辉;  季小雨;  闫春妮;  马溢轩;  钱秀雯

东南大学土木工程学院, 南京211189

Keywords:

constructed wetlands(CWs);  calcium-modified basalt fibers(Ca-MBF);  filling mode;  enzyme activity;  extracellular polymeric substances(EPS);  microbial community

人工湿地;  钙改性玄武岩纤维;  填充方式;  酶活性;  胞外聚合物;  微生物群落

PACS:

X703

DOI:

10.3969/j.issn.1003-7985.2023.02.002

Abstract:

To investigate the effects of calcium-modified basalt fiber(Ca-MBF)and its filling mode on the wastewater treatment performance of constructed wetlands(CWs), two pilot-scale CWs with vertical-filling and layered-tiling Ca-MBF were developed and compared with a conventional CW for pollution removal effect, enzyme activity spatial distribution, extracellular polymeric substances(EPS)content, and microbial community structure. The results showed that Ca-MBF could improve the microbial diversity and richness of CWs, increase nitrifying and denitrifying bacteria in the upper and middle layers of the substrates, and promote cooperation between functional genera. Ca-MBF significantly increased the enzyme activities in the middle and lower layers of CWs, resulting in higher average enzyme activity(ammonia monooxygenase, nitrite oxidoreductase, nitrate reductase, nitrite reductase, and phosphatase)of the whole system. Additionally, Ca-MBF facilitated the secretion of EPS with an average increase of 29.02% to 52.90%. Overall, Ca-MBF enhanced the ability of CWs to remove pollutants, in which the CW with layered-tiling Ca-MBF achieved the best treatment effect, with 16.72%, 6.95%, and 6.30% increase in ammonia nitrogen, total nitrogen, and total phosphorus removal, respectively. These results could provide valuable references for the application of Ca-MBF CWs.

为研究钙改性玄武岩纤维(Ca-MBF)及其填充方式对人工湿地污水处理性能的影响, 构建中试规模的分层平铺和垂直填充Ca-MBF人工湿地, 并与传统人工湿地的除污效果、酶活性空间分布、胞外聚合物含量及微生物群落结构进行对比.结果表明, Ca-MBF能提高人工湿地微生物多样性和丰富度, 增加基质上层与中层硝化菌和反硝化菌丰度, 促进功能属之间合作.Ca-MBF显著提高了湿地中层和下层的酶活性, 使整个系统的平均酶活性升高(氨单加氧酶、亚硝酸氧化还原酶、硝酸还原酶、亚硝酸还原酶和磷酸酶).此外, Ca-MBF促进了胞外聚合物的分泌, 平均增加了29.02%~52.90%.Ca-MBF能提升湿地去除污染物的能力, 分层平铺的Ca-MBF湿地效果最好, 其对氨氮、总氮和总磷去除率分别提高16.72%、6.95%和6.30%.这些结果为Ca-MBF人工湿地的应用提供了有价值的参考.

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Memo

Memo:

Biography: Huang Juan(1980—), female, doctor, professor, 101010942@seu.edu.cn.
Foundation items: The National Natural Science Foundation of China(No. 52270152), the Key R&D Projects of Jiangsu Provincial Department of Science and Technology(No. BE2022831).
Citation: Huang Juan, Wei Zhihui, Ji Xiaoyu, et al.Enhancement of wastewater treatment performance in constructed wetlands by calcium-modified basalt fiber[J].Journal of Southeast University(English Edition), 2023, 39(2):115-126.DOI:10.3969/j.issn.1003-7985.2023.02.002.

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