Study of the application of the water-lifting aerators to improve the water quality of a stratified, eutrophicated reservoir

Wei-xing, MA; Huang, Tinglin; Li, Xuan

doi:10.1016/j.ecoleng.2015.06.022

Cited by 29 publications

(13 citation statements)

References 40 publications

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“…Mixing oxygenation technology is an effective in situ measure to restore water quality [24,25,42]. In Lijiahe Reservoir, eight WLAs have been installed to improve the water quality.…”

Section: Resultsmentioning

confidence: 99%

“…The WLAs system consisting of eight water-lifting aerators achieves the coverage of the whole reservoir, whose diagram is provided in Figure 2c. The previous study demonstrated that WLAs system had three distinguished functions: destratification, oxygenation and algae inhibition [24,27,28]. The gas flow of the WLAs system was controlled between 20 and 50 m 3 /h, mainly considering the generation of air piston and the mixing efficiency of water column.…”

Section: Methodsmentioning

confidence: 99%

“…Despite the same efficiency for algae inhibition and water column mixing, pipe mixing fails in energy saving and stratified oxygenation [18]. WLAs are effective in algal cell reduction by 91% and DO concentration improvement above 2 mg/L in hypolimnion [24,25]. In addition, the energy utilization efficiency of the WLAs system was between 5.36% and 7.30% [26].…”

Section: Introductionmentioning

confidence: 99%

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S-type Dissolved Oxygen Distribution along Water Depth in a Canyon-shaped and Algae Blooming Water Source Reservoir: Reasons and Control

Huang

Yang

Wen

et al. 2019

IJERPH

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Dissolved oxygen (DO) is a crucial indicator of water quality. DO usually shows a monotonic decrease along water depth during thermal stratification in reservoir, whereas metalimnetic oxygen minimum (MOM) is observed in some cases. Although MOM phenomena have been reported in different areas, the characteristics of different reservoirs are greatly different, and few comprehensive studies have been published regarding MOM in Chinese drinking water source reservoirs. The DO distribution along water depth was determined and the detailed reasons were clarified by two-years of field monitoring. In addition the effect of water lifting aerators (WLAs) on DO improvement was investigated in the Lijiahe Reservoir in Northwest China. A typical S-type DO distribution with two anaerobic water layers, below the epilimnion (10–25 m water depth) and above the sediment (bottom water), was observed derived from the decomposition of dead algae or organic matter and the restriction of DO vertical exchange. Moreover, after WLAs’ operation since 10 June 2018, the water body was completely mixed and DO was rich and uniform along water depth by eliminating the water stratification and inhibiting algae growth. The deep understanding of the DO distribution in a deep canyon-shaped reservoir and the technical support for reservoir restoration are meaningful for optimizing reservoir management.

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“…Mixing oxygenation technology is an effective in situ measure to restore water quality [24,25,42]. In Lijiahe Reservoir, eight WLAs have been installed to improve the water quality.…”

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

S-type Dissolved Oxygen Distribution along Water Depth in a Canyon-shaped and Algae Blooming Water Source Reservoir: Reasons and Control

Huang

Yang

Wen

et al. 2019

IJERPH

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“…Of all the technologies, including physical, chemical, and biological technologies, artificial mixing proved to be effective and free from secondary pollution [12]. Water lifting aeration systems have been installed into some reservoirs for water quality improvement [13,14].…”

Section: Introductionmentioning

confidence: 99%

Water Quality Responses during the Continuous Mixing Process and Informed Management of a Stratified Drinking Water Reservoir

Zhou

Gong

et al. 2019

Sustainability

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Aeration and mixing have been proven as effective in situ water quality improvement methods, particularly for deep drinking water reservoirs. While there is some research on the mechanism of water quality improvement during artificial mixing, the changes to water quality and the microbial community during the subsequent continuous mixing process is little understood. In this study, we investigate the mechanism of water quality improvement during the continuous mixing process in a drinking water reservoir. During this period, we found a reduction in total nitrogen (TN), total phosphorus (TP), ammonium-nitrogen (NH4-N), iron (Fe), manganese (Mn), and total organic carbon (TOC) of 12.5%–30.8%. We also measured reductions of 8.6% and 6.2% in TN and organic carbon (OC), respectively, in surface sediment. Microbial metabolic activity, abundance, and carbon source utilization were also improved. Redundancy analysis indicated that temperature and dissolved oxygen (DO) were key factors affecting changes in the microbial community. With intervention, the water temperature during continuous mixing was 15 °C, and the mixing temperature in the reservoir increased by 5 °C compared with natural mixing. Our research shows that integrating and optimizing the artificial and continuous mixing processes influences energy savings. This research provides a theoretical basis for further advancing treatment optimizations for a drinking water supply.

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“…The most commonly used remediation measures from the second group are aeration of water [6], removal or shielding of bottom sediments [7,8], creation or strengthening of flow, chemical and mechanical methods for controlling blue-green algae, precipitation of phosphorus in water [9], the creation of bioplatoes from mollusks [1,10] and higher aquatic plants [11], biomanipulation [10]. The use of these methods allows one, with varying degrees of success, to restore water objects, but in order to achieve a sustainable state, a set of preventive and recovery measures should be used.…”

Section: Introductionmentioning

confidence: 99%

Transformation of zooplankton communities during pollution and restoration of lakes

Derevenskaya¹

2018

Proceedings of the International Conference "Economy in the Modern World" (ICEMW 2018)

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Studies were carried out on three lakes in Kazan (Russia). The lakes were severely polluted due to sewage discharge of industrial enterprises. In the period of 1984-1995 measures were taken for two lakes to restore their water quality. According to the project, the majority of industrial waste water was assigned to the treatment plant; at the bottom, contaminated sediment was cleaned, sewers were built, temporary flowage was organized, and beach was equipped. Water quality in lakes has improved considerably. We investigated changes in zooplankton communities during the recovery measures immediately after their completion and 20 years later. We have found that the response of zooplankton to pollution reduction is represented by the increase in the number of zooplankton species, a number of dominant species, abundance and biomass. A share of Cladocera increased in the Nizhniy Kaban Lake, while Copepoda and Cladocera shares increased in lake Sredniy Kaban. Enhanced development of these groups of zooplankton caused corresponding changes in taxonomic indicators based on the ratio of the values of abundance and biomass of zooplankton major groups, saprobic index. Follow-up study of the lakes showed that with existing high anthropogenic load, repeated remediation is required in 15-20 years.

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Study of the application of the water-lifting aerators to improve the water quality of a stratified, eutrophicated reservoir

Cited by 29 publications

References 40 publications

S-type Dissolved Oxygen Distribution along Water Depth in a Canyon-shaped and Algae Blooming Water Source Reservoir: Reasons and Control

S-type Dissolved Oxygen Distribution along Water Depth in a Canyon-shaped and Algae Blooming Water Source Reservoir: Reasons and Control

Water Quality Responses during the Continuous Mixing Process and Informed Management of a Stratified Drinking Water Reservoir

Transformation of zooplankton communities during pollution and restoration of lakes

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