Correction to: Effect of design and operational parameters on nutrients and heavy metal removal in pilot floating treatment wetlands with Eichhornia crassipes treating polluted lake water

Gaballah, Mohamed S.; Ismail, Khiary; Aboagye, Dominic; Ismail, Mona M.; Sobhi, Mostafa; Stefanakis, Alexandros I.

doi:10.1007/s11356-021-12789-x

Cited by 6 publications

(3 citation statements)

References 76 publications

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“…The higher depth (~80 cm) in the FTW cells could have limited the removal of organic matter (BOD 5 and COD) to <55% due to the dead zones created at the bottom as a result of the still-developing root system of the emergent macrophytes. In some studies, higher BOD 5 (~90%) removal was observed at shallow depths of <25 cm [17,36]. This study indicates that long durations of FTW experiments with fully developed root systems should be conducted to evaluate the efficacy of these systems.…”

Section: Organic Matter Attenuation: Bod 5 and Cod Variationmentioning

confidence: 93%

“…In addition to the surface area for biofilm growth, plants also provide oxygen through their roots, which directly influence the redox potential of the water column, affecting nitrogen transformation and aerobic degradation of organic matter, while the release of root exudates from plants affects biological processes such as denitrification [14,17,18]. Most commonly used plant species in FTWs are persistent emergent plants such as cattails (Typha), bulrushes (Scirpus), other sedges (Cyperus), rushes (Juncus), spike-rush (Eleocharis), common reed (Phragmites), and Indian shot (Canna indica) [1,14,17,19,20].…”

Section: Introductionmentioning

confidence: 99%

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Evaluating Pilot-Scale Floating Wetland for Municipal Wastewater Treatment Using Canna indica and Phragmites australis as Plant Species

Yadav,

Kumar,

Malyan

et al. 2023

Sustainability

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Floating treatment wetlands (FTWs), also called constructed floating wetlands or floating islands, are a recent innovation in constructed wetlands (CWs) inspired by natural wetlands. In FTWs, emergent plants grown hydroponically on buoyant mats are used for wastewater treatment, which makes them far more economical than other CWs. The objective of this study was to evaluate the performance of FTWs for the treatment of municipal wastewater from an urban drain using native plant species Canna indica and Phragmites australis. A pilot-scale experiment was carried out using four FTW treatment cells with different plant coverages for pollutant removal: C1 (Canna indica, 100% coverage), C2 (Phragmites australis, 100% coverage), C3 (Phragmites australis, 50% coverage), and C4 (control). Overall, treatment cells with Canna indica and Phragmites australis showed reductions in BOD5, COD, EC, TDS, NO3−, and PO43− compared with the control. Maximum BOD5 and COD removal was 53% and 50%, respectively, at 50% coverage of Phragmites australis (C3). The maximum reduction in NO3− (61%) was achieved using Canna indica at 100% coverage (C1). Conversely, moderate removal of PO43− (27%) was obtained in the control (C4) with a visibly high amount of algal growth, indicating the influence of algae on pollutant removal. This study highlights the significance of Phragmites australis for organic matter removal and Canna indica for nutrient removal, mainly NO3− from municipal wastewater. Furthermore, this study suggests that FTWs perform well for BOD5 and COD removal at 50% plant coverage (Phragmites australis) and NO3− removal at 100% coverage (Canna indica).

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Section: Organic Matter Attenuation: Bod 5 and Cod Variationmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Evaluating Pilot-Scale Floating Wetland for Municipal Wastewater Treatment Using Canna indica and Phragmites australis as Plant Species

Yadav,

Kumar,

Malyan

et al. 2023

Sustainability

View full text Add to dashboard Cite

show abstract

“…In order to enhance the biofilm growth, EFTWs are integrated traditional FTWs with biofilm carriers including artificial materials (e.g., plastic filling materials, elastic packing, and combination filler), as well as agricultural wastes (e.g., palm fiber, straw, and sponge) (Awad et al, 2022; Cao & Zhang, 2014; Gaballah et al, 2021; Yang et al, 2015). The biofilm carriers in the EFTW system can provide additional surface area for the attachment of microorganisms (Wu et al, 2016; Zhang et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Nitrogen removal and microbial mechanisms in a novel tubular bioreactor‐enhanced floating treatment wetland for the treatment of high nitrate river water

Cui

Yang

Zhang

et al. 2022

Water Environment Research

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A novel tubular bioreactor‐enhanced floating treatment wetland (TB‐EFTW) was developed for the in situ treatment of high nitrate river water. When compared with the enhanced floating treatment wetland (EFTW), the TB‐EFTW system achieved 30% higher total nitrogen removal efficiency. Further, the average TN level of the TB‐EFTW effluent was below the Grade IV requirement (1.5 mg/L) specified in Chinese standard (GB3838‐2002). Microbial analysis revealed that both aerobic and anoxic denitrifying bacteria coexisted in the new system. The relative abundance of aerobic and anoxic denitrifiers were 42.69% and 22% at the middle and end of the tubular bioreactor (TB), respectively. It is reasonable to assume that effective nitrogen removal can mainly be attributed to the addition of solid carbon source and the spatial difference in DO distribution (oxic–anoxic areas in sequence) inside the TB. The initial investment cost and operating costs associated with the TB‐EFTW system are approximately 14,000 and 3500 yuan per 1000 m3 river water, respectively. Considering its low cost, minimal maintenance requirements, and effective nitrogen removal, this newly developed system can be regarded as a promising technology for treating high nitrate river water. Practitioner Points A novel TB‐EFTW system was developed to upgrade traditional in situ treatment techniques. The TB‐EFTW could achieve 30% higher nitrogen removal efficiency than EFTWs. Both aerobic and anoxic denitrifying bacteria coexisted in the system. The system shows better technical and economic performance compared with routine techniques.

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Predicting flocculant dosage in the drinking water treatment process using Elman neural network

Wang

Chang

2021

Environ Sci Pollut Res

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Correction to: Effect of design and operational parameters on nutrients and heavy metal removal in pilot floating treatment wetlands with Eichhornia crassipes treating polluted lake water

Cited by 6 publications

References 76 publications

Evaluating Pilot-Scale Floating Wetland for Municipal Wastewater Treatment Using Canna indica and Phragmites australis as Plant Species

Evaluating Pilot-Scale Floating Wetland for Municipal Wastewater Treatment Using Canna indica and Phragmites australis as Plant Species

Nitrogen removal and microbial mechanisms in a novel tubular bioreactor‐enhanced floating treatment wetland for the treatment of high nitrate river water

Predicting flocculant dosage in the drinking water treatment process using Elman neural network

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