On the risks from sediment and overlying water by replenishing urban landscape ponds with reclaimed wastewater

Ao, Dong; Chen, Rong; Wang, Xiaochang C.; Liu, Yanzheng; Dzakpasu, Mawuli; Zhang, Lu; Huang, Yue; Xue, T.; Wang, Nan

doi:10.1016/j.envpol.2018.01.105

Cited by 26 publications

(5 citation statements)

References 65 publications

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“…Ao et al (2018) and Liu (2019) found that in urban ponds mainly replenished by reclaimed water, the N and P content in water bodies decreased with the decreasing water exchange periods. In this study, the exchange period had little impact on the N and P content [ 13 , 28 ]. The difference in our study may be attributed to the relatively smaller TP content in the reclaimed water.…”

Section: Discussionmentioning

confidence: 99%

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

Pan

guo

2022

IJERPH

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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 CODMn and NH3–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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Section: Discussionmentioning

confidence: 99%

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

Pan

guo

2022

IJERPH

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“…That was because the high concentration of TP in the reclaimed water (0.500 mg/L) and the circulation system would further the spread of reclaimed water around the whole lake. Ao et al (2018a) has also proved that the continued use of reclaimed water for replenishment significantly increased the risk of eutrophication due to the high phosphorus content.…”

Section: Water Quality Simulationmentioning

confidence: 99%

Effect of hydrodynamic conditions on the water quality in urban landscape water

et al. 2021

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In this study, a 2D hydrodynamic and water quality model was built based on MIKE 21 to investigate the relationship between hydrodynamic condition and water quality, and then applied in an urban landscape lake in Tianjin, China. Moreover, an engineering experiment was carried out to confirm the comprehensive degradation coefficients of COD, TP, NH4+-N, and TN (0.014 d−1, 0.024 d−1, 0.019 d−1, and 0.005 d−1, respective). Circulation system was the main force that expedited water changes and pollutant movement, increased the lake average water speed from 0.003 m/s to 0.008 m/s, and could effectively reduce the COD, NH4+-N and TN concentration nearly by 35, 32, and 5%. The high concentrations nitrogen and phosphorus in the reclaimed water would accelerate the deterioration of water quality, and the concentrations of TP, NH4+-N, and TN in the lake increased from 0.080 mg/l, 0.53 mg/l, and 1.53 mg/l to 0.090–0.096 mg/l, 0.71–0.81 mg/l, and 1.89–2.08 mg/l, respectively. The circulation system could slow the water quality deterioration but cannot eliminate the eutrophication risk. Improving the hydrodynamic conditions was proposed for enhancing water quality in urban landscape lakes.

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“…Recently, China has made great progress in the development and utilization of unconventional water sources, especially the recycling of tailwater from wastewater treatment plants [1][2][3]. The amount of unconventional water utilization in China has increased remarkably from 2000 to 2020, which plays an important role in alleviating the contradiction between water supply and demand, optimizing regional water resource allocation, and protecting the water environment [3][4][5][6][7]. However, the development and utilization of unconventional water is still critical in most Chinese cities due to the serious water shortage problem [5,8,9].…”

Section: Introductionmentioning

confidence: 99%

Study of Water Resource Allocation and Optimization Considering Reclaimed Water in a Typical Chinese City

Wang

et al. 2023

Sustainability

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Reclaimed water is considered to be an important alternative to freshwater to solve the imbalance between the supply and demand of regional water resources; it is also recognized as an effective tool for alleviating ecological problems caused by insufficient water flow. Yiwu City is a typical area experiencing a water shortage in southeastern China because the regional water resources are limited. In this study, the multiple water resource allocations in Yiwu City are optimized, the complex coupling model of multiple water resource allocation is established, and both the economic and ecological effects of multiple water resource allocation in Yiwu City are simulated and analyzed. The simulation results of optimizing the multiple water resource allocations show an efficient way of reclaimed water utilization in this typical Chinese city. In order to ensure the future economic and social development of Yiwu City, it is necessary to introduce reclaimed water into different fields, such as residential water, industrial water, agricultural water, and environmental water. Reclaimed water has also proven to have a high capability for pollutant control and reduction, which is also important to the ecology and environmental protection.

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On the risks from sediment and overlying water by replenishing urban landscape ponds with reclaimed wastewater

Cited by 26 publications

References 65 publications

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

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

Effect of hydrodynamic conditions on the water quality in urban landscape water

Study of Water Resource Allocation and Optimization Considering Reclaimed Water in a Typical Chinese City

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