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A Simulation Experiment on Quality Dynamics of Reclaimed Water under Different Flow Exchanges

Reclaimed water plays an important role in maintaining urban aquatic ecosystems, especially in areas with water shortages. However, there is little information on water quality dynamics and its driving mechanism in reclaimed water bodies. The simulated experiments were conducted to investigate the e...

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Detalles Bibliográficos
Autores principales: Pan, Chengzhong, Guo, Zhongfang, Luo, Mingjie
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9603255/
https://www.ncbi.nlm.nih.gov/pubmed/36293677
http://dx.doi.org/10.3390/ijerph192013091
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author Pan, Chengzhong
Guo, Zhongfang
Luo, Mingjie
author_facet Pan, Chengzhong
Guo, Zhongfang
Luo, Mingjie
author_sort Pan, Chengzhong
collection PubMed
description Reclaimed water plays an important role in maintaining urban aquatic ecosystems, especially in areas with water shortages. However, there is little information on water quality dynamics and its driving mechanism in reclaimed water bodies. The simulated experiments were conducted to investigate the effect of flow exchange on water quality dynamics and soil microbial diversity for 100% reclaimed water and mixed water (50% reclaimed and 50% stream water), and the exchange periods ranged from 2 to 40 days. The results showed that the degradation coefficients (K) of COD(Mn) and NH(3)–N were 0.015 d(−1) and 0.001 d(−1) for the mixed water, while their K values were negative for the reclaimed water. The flow exchange had little effect on water quality dynamics for the mixed water, which may be attributed to the relatively low concentration of TP in this reclaimed water. A small or great exchange period led to a relatively high fluctuation in K during the experimental period and corresponded to a worse soil microbial diversity. These results indicate that it is not recommended to fill an isolated urban lake with 100% reclaimed water and that a suitable flow exchange period of 5~10 days could help self-purify the water quality.
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spelling pubmed-96032552022-10-27 A Simulation Experiment on Quality Dynamics of Reclaimed Water under Different Flow Exchanges Pan, Chengzhong Guo, Zhongfang Luo, Mingjie Int J Environ Res Public Health Article Reclaimed water plays an important role in maintaining urban aquatic ecosystems, especially in areas with water shortages. However, there is little information on water quality dynamics and its driving mechanism in reclaimed water bodies. The simulated experiments were conducted to investigate the effect of flow exchange on water quality dynamics and soil microbial diversity for 100% reclaimed water and mixed water (50% reclaimed and 50% stream water), and the exchange periods ranged from 2 to 40 days. The results showed that the degradation coefficients (K) of COD(Mn) and NH(3)–N were 0.015 d(−1) and 0.001 d(−1) for the mixed water, while their K values were negative for the reclaimed water. The flow exchange had little effect on water quality dynamics for the mixed water, which may be attributed to the relatively low concentration of TP in this reclaimed water. A small or great exchange period led to a relatively high fluctuation in K during the experimental period and corresponded to a worse soil microbial diversity. These results indicate that it is not recommended to fill an isolated urban lake with 100% reclaimed water and that a suitable flow exchange period of 5~10 days could help self-purify the water quality. MDPI 2022-10-12 /pmc/articles/PMC9603255/ /pubmed/36293677 http://dx.doi.org/10.3390/ijerph192013091 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Pan, Chengzhong
Guo, Zhongfang
Luo, Mingjie
A Simulation Experiment on Quality Dynamics of Reclaimed Water under Different Flow Exchanges
title A Simulation Experiment on Quality Dynamics of Reclaimed Water under Different Flow Exchanges
title_full A Simulation Experiment on Quality Dynamics of Reclaimed Water under Different Flow Exchanges
title_fullStr A Simulation Experiment on Quality Dynamics of Reclaimed Water under Different Flow Exchanges
title_full_unstemmed A Simulation Experiment on Quality Dynamics of Reclaimed Water under Different Flow Exchanges
title_short A Simulation Experiment on Quality Dynamics of Reclaimed Water under Different Flow Exchanges
title_sort simulation experiment on quality dynamics of reclaimed water under different flow exchanges
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9603255/
https://www.ncbi.nlm.nih.gov/pubmed/36293677
http://dx.doi.org/10.3390/ijerph192013091
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