Process evaluation of urban river replenished with reclaimed water from a wastewater treatment plant based on the risk of algal bloom and comprehensive acute toxicity
Municipal wastewater reuse has an important role to play with scarce water resources and serious water pollution. However, the impact of reclaimed water on the aquatic ecology and organisms of the receiving water needs to be assessed. This study investigated one ecological restoration project of an...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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IWA Publishing
2022-03-01
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| Series: | Water Reuse |
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| Online Access: | http://jwrd.iwaponline.com/content/12/1/1 |
| _version_ | 1797200767195545600 |
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| author | Danyan Sun Xiaohu Lin Zhibo Lu Juwen Huang Guangming Li Jingcheng Xu |
| author_facet | Danyan Sun Xiaohu Lin Zhibo Lu Juwen Huang Guangming Li Jingcheng Xu |
| author_sort | Danyan Sun |
| collection | DOAJ |
| description | Municipal wastewater reuse has an important role to play with scarce water resources and serious water pollution. However, the impact of reclaimed water on the aquatic ecology and organisms of the receiving water needs to be assessed. This study investigated one ecological restoration project of an urban river replenished with reclaimed water, and evaluated the risk of algal bloom and acute biological toxicity in the river. Results showed that the concentrations of permanganate index and ammonia nitrogen in the river could stably remain below the standard values, the concentrations of total phosphorus were high and most of the monitoring values were between 0.42 and 0.86 mg/L. The content of chlorophyll a was relatively lower, ranging from 0.06 to 0.10 mg/m3. The maximum value of Fv/Fm was 0.42, which was lower than the algal bloom prediction threshold of 0.63. Moreover, the results of luminescence inhibition rate on luminescent bacteria showed that the reclaimed water did not cause significant biological toxicity to the aquatic ecology. The study suggested that implementing urban reclaimed water reuse projects requires a series of ecological purification and restoration technologies in the receiving water, which can effectively guarantee the stability of water quality and the safety of water ecological environment. HIGHLIGHTS
Ecological restoration project of urban river replenished with reclaimed water was evaluated.;
Water quality of the receiving water was mainly affected by its water source.;
In the situation of relatively high nutrient concentration, the possibility of algal blooms was small.;
In the river replenished with reclaimed water, application of ecological restoration technologies could effectively maintain the water ecological safety.; |
| first_indexed | 2024-04-13T23:35:48Z |
| format | Article |
| id | doaj.art-f4443e6898944d3bbb7c951804a70bff |
| institution | Directory Open Access Journal |
| issn | 2709-6092 2709-6106 |
| language | English |
| last_indexed | 2024-04-24T07:36:53Z |
| publishDate | 2022-03-01 |
| publisher | IWA Publishing |
| record_format | Article |
| series | Water Reuse |
| spelling | doaj.art-f4443e6898944d3bbb7c951804a70bff2024-04-20T06:10:22ZengIWA PublishingWater Reuse2709-60922709-61062022-03-0112111010.2166/wrd.2021.023023Process evaluation of urban river replenished with reclaimed water from a wastewater treatment plant based on the risk of algal bloom and comprehensive acute toxicityDanyan Sun0Xiaohu Lin1Zhibo Lu2Juwen Huang3Guangming Li4Jingcheng Xu5 College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China Municipal wastewater reuse has an important role to play with scarce water resources and serious water pollution. However, the impact of reclaimed water on the aquatic ecology and organisms of the receiving water needs to be assessed. This study investigated one ecological restoration project of an urban river replenished with reclaimed water, and evaluated the risk of algal bloom and acute biological toxicity in the river. Results showed that the concentrations of permanganate index and ammonia nitrogen in the river could stably remain below the standard values, the concentrations of total phosphorus were high and most of the monitoring values were between 0.42 and 0.86 mg/L. The content of chlorophyll a was relatively lower, ranging from 0.06 to 0.10 mg/m3. The maximum value of Fv/Fm was 0.42, which was lower than the algal bloom prediction threshold of 0.63. Moreover, the results of luminescence inhibition rate on luminescent bacteria showed that the reclaimed water did not cause significant biological toxicity to the aquatic ecology. The study suggested that implementing urban reclaimed water reuse projects requires a series of ecological purification and restoration technologies in the receiving water, which can effectively guarantee the stability of water quality and the safety of water ecological environment. HIGHLIGHTS Ecological restoration project of urban river replenished with reclaimed water was evaluated.; Water quality of the receiving water was mainly affected by its water source.; In the situation of relatively high nutrient concentration, the possibility of algal blooms was small.; In the river replenished with reclaimed water, application of ecological restoration technologies could effectively maintain the water ecological safety.;http://jwrd.iwaponline.com/content/12/1/1algal bloomsecological restorationluminescent bacteria testreclaimed waterwater acute biological toxicity |
| spellingShingle | Danyan Sun Xiaohu Lin Zhibo Lu Juwen Huang Guangming Li Jingcheng Xu Process evaluation of urban river replenished with reclaimed water from a wastewater treatment plant based on the risk of algal bloom and comprehensive acute toxicity Water Reuse algal blooms ecological restoration luminescent bacteria test reclaimed water water acute biological toxicity |
| title | Process evaluation of urban river replenished with reclaimed water from a wastewater treatment plant based on the risk of algal bloom and comprehensive acute toxicity |
| title_full | Process evaluation of urban river replenished with reclaimed water from a wastewater treatment plant based on the risk of algal bloom and comprehensive acute toxicity |
| title_fullStr | Process evaluation of urban river replenished with reclaimed water from a wastewater treatment plant based on the risk of algal bloom and comprehensive acute toxicity |
| title_full_unstemmed | Process evaluation of urban river replenished with reclaimed water from a wastewater treatment plant based on the risk of algal bloom and comprehensive acute toxicity |
| title_short | Process evaluation of urban river replenished with reclaimed water from a wastewater treatment plant based on the risk of algal bloom and comprehensive acute toxicity |
| title_sort | process evaluation of urban river replenished with reclaimed water from a wastewater treatment plant based on the risk of algal bloom and comprehensive acute toxicity |
| topic | algal blooms ecological restoration luminescent bacteria test reclaimed water water acute biological toxicity |
| url | http://jwrd.iwaponline.com/content/12/1/1 |
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