[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()

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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

Author(s):

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

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

Keywords:

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

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.

References:

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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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