Enhancing the water purification efficiency of a floating treatment wetland using a biofilm carrier

Zhang, Lingling; Zhao, Jiayi; Cui, Naxin; Dai, Yanran; Kong, Lingwei; Wu, Juan; Cheng, Shuiping

doi:10.1007/s11356-015-5873-9

Cited by 61 publications

(38 citation statements)

References 24 publications

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“…An additional sorbent/substrate surrounding the root system of the plants in floating treatment wetlands was needed to adequately remove nutrients 20 , 21 . The EEFBs integrated with different substrates have been reported to improve purification efficiency 22 , 23 . In our study, although both CEFB and EEFB effectively removed N, P and COD in the water, the EEFB purification efficiency was significantly enhanced ( P < 0.05), especially for the removal of TN and NH 4 + -N (Fig.…”

Section: Discussionmentioning

confidence: 99%

Comparison of two different ecological floating bio-reactors for pollution control in hyper-eutrophic freshwater

Cui

Chen

Liu

et al. 2018

Sci Rep

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The use of ecological floating beds (EFBs) to control water pollution has been increasingly reported worldwide due to the severe situation of eutrophication in water bodies. In this study, two kinds of EFBs were set up under similar condition to compare their purification efficiency in hyper-eutrophic water. The conventional ecological floating bed (CEFB) was made of polystyrene foam board, and the enhanced ecological floating bio-reactor (EEFB) was designed as an innovative hollow, thin floating bed integrated with substrates of zeolite and limestone. The results showed that the EEFB increased treatment efficiency of total nitrogen (TN), total phosphate (TP), and ammonia nitrogen (NH4+-N) to 63.5%, 59.3%, and 68.0%, respectively. Plant accumulation was the main pathway for TN and TP removal in the CEFB. Microbial degradation played an increasingly important role in TN and TP removal in the EEFB. A higher concentration of nitrogen cycling bacteria was recorded in the EEFB than the CEFB (P < 0.05), suggesting that the substrates might enhanced the removal efficiency of the EEFB by promoting the growth of microorganisms rather than their absorption effect.

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Section: Discussionmentioning

confidence: 99%

Comparison of two different ecological floating bio-reactors for pollution control in hyper-eutrophic freshwater

Cui

Chen

Liu

et al. 2018

Sci Rep

Self Cite

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“…However, it was observed that in T1 treatment, hydrocarbon reduction was 2 times lower than T3 treatment. It may be due to the reason that in T1 treatment, the growth of the microorganism is suppressed due to the presence of a higher amount of toxic hydrocarbons in absence of the plants that resulted in lower reduction in this treatment [37,38]. Relatively higher reduction in hydrocarbons (56.56%) was detected in T2 treatment, vegetated with the plant but deprived of bacterial consortium rather than un-vegetated treatment (T1).…”

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confidence: 87%

Cyperus laevigatus L. Enhances Diesel Oil Remediation in Synergism with Bacterial Inoculation in Floating Treatment Wetlands

et al. 2020

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Diesel oil is considered a very hazardous fuel due to its adverse effect on the aquatic ecosystem, so its remediation has become the focus of much attention. Taking this into consideration, the current study was conducted to explore the synergistic applications of both plant and bacteria for cleaning up of diesel oil contaminated water. We examined that the application of floating treatment wetlands (FTWs) is an economical and superlative choice for the treatment of diesel oil contaminated water. In this study, a pilot scale floating treatment wetlands system having diesel oil contaminated water (1% w/v), was adopted using Cyperus laevigatus L and a mixture of hydrocarbons degrading bacterial strains; viz., Acinetobacter sp.61KJ620863, Bacillus megaterium 65 KF478214, and Acinetobacter sp.82 KF478231. It was observed that consortium of hydrocarbons degrading bacteria improved the remediation of diesel oil in combination with Cyperus laevigatus L. Moreover, the performance of the FTWs was enhanced by colonization of bacterial strains in the root and shoot of Cyperus laevigatus L. Independently, the bacterial consortium and Cyperus laevigatus L exhibited 37.46% and 56.57% reduction in diesel oil, respectively, while 73.48% reduction in hydrocarbons was exhibited by the joint application of both plant and bacteria in FTWs. Furthermore, microbial inoculation improved the fresh biomass (11.62%), dry biomass (33.33%), and height (18.05%) of plants. Fish toxicity assay evaluated the effectiveness of FTWs by showing the extent of improvement in the water quality to a level that became safe for living organisms. The study therefore concluded that Cyperus laevigatus L augmented with hydrocarbons degrading bacterial consortium exhibited a remarkable ability to decontaminate the diesel oil from water and could enhance the FTWs performance.

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“…There is a certain degree of agricultural production and daily water discharge activities surrounding the park, causing pollution and eutrophication of surrounding water bodies, among which is COD (chemical oxygen demand: the oxygen equivalent of the substance that can be oxidized by a strong oxidizing agent), which is the indicator that can represent water body pollution, TN (total nitrogen: representing milligrams of nitrogen per liter of water), and TP (total phosphorus: representing milligrams of nitrogen per liter of water) -which are the indicators that represent water body eutrophication. In response to this man-made water stress, wetland ecosystems can filter out contaminants in water through watersoil-biological complex systems to achieve the function of water purification [37], the value evaluation of this function is mainly based on the COD, TN, and TP: (6) …where V is the total water purification value of the reservoir; N represents the total amount of pollutants -the total amount of TP removal in Aha Reservoir is 8750 kg and the removal of TN is 298300 kg, and because of the lack of removal rate data for COD, this study calculated the retention of COD at 10840000 kg; and R represents pollutant removal rate (%). According to the regional removal rate provided by the local environmental protection bureau in Guiyang, the removal rates of TN and TP are 35.5% and 24.4%; and P is the average cost of cleaning up per unit pollutants (RMB/kg).…”

Section: Water Purificationmentioning

confidence: 99%

Framework for Valuating Urban Wetland Park Ecosystem Services Based on the Cascade Approach

Yuan¹,

Cheng²,

Wang³

et al. 2019

Pol. J. Environ. Stud.

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Urbanization has brought about a substantial increase in population growth, and a considerable amount of park green space has been exposed to urban construction land, which has greatly affected the natural and social value of the urban natural capital. Although this problem is serious in developing countries such as China, few studies have been conducted on the basis of a comprehensive evaluation of urban natural areas. This study evaluates the ecological services value of urban wetland parks from two perspectives: 1) the urban economic development brought by urbanization has an obvious artificial influence on an urban park's economic value and 2) the wetland ecosystem plays an important role in regulating and improving the surrounding urban environment. A flexible evaluation step model and a series of quantitative evaluation methods was constructed and used in a case study of Aha Lake National Wetland Park in Guiyang, China, based on a comprehensive analysis of the social, economic, and ecological values of the park. The results show that the total ecosystem service value of Aha Lake National Wetland Park is 1.92×10 9 yuan. This article has two main purposes: 1) serving as an innovative quantitative evaluation method of key indicators and 2) establishing a framework of ecosystem services value evaluation for urban parks based on the cascade model.

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Enhancing the water purification efficiency of a floating treatment wetland using a biofilm carrier

Cited by 61 publications

References 24 publications

Comparison of two different ecological floating bio-reactors for pollution control in hyper-eutrophic freshwater

Comparison of two different ecological floating bio-reactors for pollution control in hyper-eutrophic freshwater

Cyperus laevigatus L. Enhances Diesel Oil Remediation in Synergism with Bacterial Inoculation in Floating Treatment Wetlands

Framework for Valuating Urban Wetland Park Ecosystem Services Based on the Cascade Approach

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