Study on the purification effect of aeration-enhanced horizontal subsurface-flow constructed wetland on polluted urban river water

Li-wei, Guo; He, Tianyu; Liu, Yanhui; Chen, Zhengyang; Li, Lijuan; Huang, Qinqin; Xie, Zhihao; Xie, Yonghong; Wu, Lishan; Liu, Jing

doi:10.1007/s11356-019-04832-9

Cited by 19 publications

(13 citation statements)

References 28 publications

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“…DO values decreased gradually with the competition for oxygen consumption between ammonia oxidation and organic degradation [18]. At 72-h HRT, DO detected at effluent of single SMP and CW reached 0.6 mg L -1 and 0.2 mg L -1 , which was deficient to nitrification and organic degradation [19]. However, DO content increased obviously with HRT due to algal photosynthesis in single HRAP, which urgently promoted DO level of subsequent CW in hybrid system A.…”

Section: Resultsmentioning

confidence: 97%

Synergistic Effects of High Rate Algal Pond and Submerged Macrophyte Pond on Constructed Wetland for Water Purification

Ding¹,

Sun²,

Feng³

et al. 2021

Pol. J. Environ. Stud.

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This study was to assess the synergistic effects of high rate algal pond (HRAP) and submerged macrophyte pond (SMP) on constructed wetland (CW) for water purification. The results showed that algae debris and algae-macrophyte photosynthesis could promote the carbon and oxygen level while surplus algae were effectively inhibited by Vallisneria natans, thus facilitating nitrificationdenitrification and organic degradation of subsequent CW in HRAP-SMP-CW hybrid system. Water purification performance in hybrid system was significantly better than that in single HRAP, SMP and CW reactor. The extension of hydraulic retention time in hybrid system was conducive to higher-quality effluent. 89.4±2.5% algae biomass, 93.2±1.4% NH 4 -N, 90.0±1.4% TN, 99.9±0.1% TP and 92.4±2.0% COD could be reduced in hybrid system under 5d-HRT. The study demonstrated that the novel integration of pond-wetland hybrid system could be a cost-effective wastewater treatment technology.

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Section: Resultsmentioning

confidence: 97%

Synergistic Effects of High Rate Algal Pond and Submerged Macrophyte Pond on Constructed Wetland for Water Purification

Ding¹,

Sun²,

Feng³

et al. 2021

Pol. J. Environ. Stud.

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“…Compared with those in S1, the NH 4 + -N removal efficiencies decreased 61.1% (C1), 57.6% (C2), 54.8% (C3), 50.3% (I1), 46.9% (I2) and 46.7% (I3) in S2, respectively. It might be attributed to the fact that the drop in temperature inhibited the activity of nitrifying bacteria [29]. But from the NH 4 + -N removal percentages of I1 (52.2%) in S1 and I3 (44.1%) in S2, it only decreased 15.5% in the cool season.…”

Section: Effects Of Aeration Position and Plant Species On The Purifi...mentioning

confidence: 96%

The Interaction Effects of Aeration and Plant on the Purification Performance of Horizontal Subsurface Flow Constructed Wetland

Chen

Zhong

Chen³

et al. 2022

IJERPH

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Aeration and plants exhibit influence on the water purification performance in constructed wetlands (CWs). However, the interaction between aeration and plants on enhancing performance of domestic sewage treatment is unclear. Our study aims to optimize the combination of aeration position and plant species, promoting the extensive and effective application of CWs. Herein, six horizontal subsurface flow (HSSF) CWs small scale plots were established and divided into two groups according to the plant (i.e., Canna indica and Iris sibirica). To adjust the distribution of dissolved oxygen (DO) in CWs, each group had three plots of HSSF CWs. One plot was aerated at the bottom of the first quarter of the filtration chamber, one plot was aerated at the bottom of the inflow chamber, and the remaining plot was not aerated as a control. Results showed that aeration at the bottom of the first quarter filtration chamber could contribute to the highest removal efficiency of chemical oxygen demand (COD), ammonium nitrogen (NH4+-N) and total nitrogen (TN). The COD, NH4+-N, and TN removal percentages decreased with the drop in temperature. However, the plot aerated at the bottom of the first quarter filtration chamber with I. sibirica exhibited the best average CODCr, NH4+-N and TN removal percentages in both the warm season (83.6%, 82.7% and 76.8%) and the cool season (66.3%, 44.1% and 43.8%). Therefore, this study indicated that the combination of aerating at the bottom of the first quarter filtration chamber and planting with I. sibirica in the HSSF CWs would be a promising way forward for wastewater treatment, especially in low temperature seasons.

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“…One study illustrated that there was no significant difference in the COD removal between continuous aeration, intermittent aeration, and non-aerated systems, but there was a significant effect on N removal from wastewater (Uggetti et al 2016). Intermittent aeration helped achieve aerobic and anoxic conditions to achieve higher N removal concentrations (Liu et al 2019). According to previous research, intermittent aeration can reduce the photosynthetic process of plants, but four hours of intermittent aeration per day has very little effect on plants (Fan et al 2013).…”

Section: Aeration Reoxygenation Pondmentioning

confidence: 99%

Demonstration study of bypass multipond wetland system to enhance river water quality

Zeng

Xie

Guo

et al. 2022

Water Science and Technology

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This study focused on the water quality of a river in Wuhan City, China, that is surrounded by ponds that were transformed into a bypass multipond wetland system to improve river water quality. The bypass multipond wetland system included surface flow artificial wetlands, modified partition ponds, aeration reoxygenation ponds, ecological ponds, and other processes. After the stable operation of the process, the water transparency was higher than 60 cm and the dissolved oxygen (DO) was higher than 5 mg/L, while the ammonia nitrogen (NH3-N) concentration was less than 1.0 mg/L, total phosphorus (TP) was lower than 0.2 mg/L, and chemical oxygen demand (COD) was lower than 20 mg/L, achieving the treatment target. After monitoring the results of each process, the process which best enhanced the water transparency enhancement was the surface flow of the artificial wetlands and ecological ponds. The aeration reoxygenation pond had the best effect on DO enhancement. The processes that most affected NH3-N and TP removal were the surface flow artificial wetlands and ecological ponds. The modified parthenogenic pond had the greatest effect on COD removal. The bypass multi-pond wetland system not only improved the river water quality but also enhanced the river landscape, and can act as a reference for similar river water quality improvement actions.

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Study on the purification effect of aeration-enhanced horizontal subsurface-flow constructed wetland on polluted urban river water

Cited by 19 publications

References 28 publications

Synergistic Effects of High Rate Algal Pond and Submerged Macrophyte Pond on Constructed Wetland for Water Purification

Synergistic Effects of High Rate Algal Pond and Submerged Macrophyte Pond on Constructed Wetland for Water Purification

The Interaction Effects of Aeration and Plant on the Purification Performance of Horizontal Subsurface Flow Constructed Wetland

Demonstration study of bypass multipond wetland system to enhance river water quality

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