Domestic greywater treatment by electrocoagulation using hybrid electrode combinations

Barışçı, Sibel; Türkay, Özge

doi:10.1016/j.jwpe.2016.01.015

Cited by 79 publications

(13 citation statements)

References 24 publications

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“…Fe–Al electrode combination supplied the highest boric acid removal. This can be explained by oxidation potential of iron (−0.447 V) compared to that for aluminum (−1.662 V), and also iron electrodes can produce more bubbles than aluminum electrodes …”

Section: Resultsmentioning

confidence: 99%

Operating Cost and Treatment of Boron from Aqueous Solutions by Electrocoagulation in Low Concentration

Deniz

Akarsu

2018

Global Challenges

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The objective of this study is to determine the optimum parameters of electrocoagulation process in treatment of boron in low concentrations. Especially, studies on electrode optimization in low boron concentrated waters are insufficient. Therefore, the effect of electrode combination (Al–Al, Al–Fe, Al–SS, Fe–Al, Fe–Fe, and Fe–SS), pH (5–9), current density (8–24 mA cm −2 ), distance (1–3 cm), and electrolysis time (10–90 min) on treatment of boron containing wastewater is studied to obtain maximum removal efficiency. The maximum removal efficiency of boron is obtained as 95.6%. Operation conditions for maximum removal are the electrode combination of Fe–Al, current density of 16 mA cm −2 , pH 7.0, concentration of 30 mg L −1 and the reaction time of 70 min. Operating cost of the electrocoagulation process is calculated as 2.35 $ m −3 . This study indicates that the electrocoagulation process can be successfully applied in order to treat boron‐polluted wastewaters at low initial concentrations.

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Section: Resultsmentioning

confidence: 99%

Operating Cost and Treatment of Boron from Aqueous Solutions by Electrocoagulation in Low Concentration

Deniz

Akarsu

2018

Global Challenges

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“…During the 30 min settling time, the turbidity decreased for all anodes as a result of the sedimentation of flocs (Figure 4). However, the reduction in turbidity during the settling time was very small for the Zn and Fe anodes owing to Zn(OH) 2 precipitation, and of the suspension turned yellowish-brown owing to the oxidation of Fe 2+ to Fe 3+ in the presence of oxygen [34,35].…”

Section: Discussionmentioning

confidence: 99%

Comparison of Different Anode Materials to Remove Microcystis aeruginosa Cells Using Electro-Coagulation–Flotation Process at Low Current Inputs

Meetiyagoda

Fujino

2020

Water

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Cyanobacterial blooms are a threat to the drinking water supply owing to their potential toxicity. Microcystins which are the most widespread cyanotoxins, are mainly produced by Microcystis spp. In this study, we cultured Microcystis aeruginosa cells in BG-11 medium at 25 °C to investigate the efficiency of the electro-coagulation–flotation process to remove them. Different anode materials (Fe, Al, Cu, and Zn) along with a graphite cathode were compared separately in the 10–100 mA current range in a 0.025 M Na2SO4 electrolyte. Turbidity, optical density at 684 nm (OD684), OD730, Chl-a concentration, and DOC concentration were analyzed to clarify the mechanism by which M. aeruginosa cells are removed. The Al anode indicated the highest removal efficiencies in terms of turbidity (90%), OD684 and OD730 (98%), and Chl-a concentration (96%) within 30 min at 4.0 mA/cm2 current density and the lowest average electrode consumption of 0.120 ± 0.023 g/L. The energy consumption of the Al electrode was 0.80 Wh/L. From these results, we found that Al was the best among the anode materials evaluated to remove M. aeruginosa cells. However, further studies are required to optimize the Al anode in terms of pH, treatment time, electrode distance, and electrolyte concentration to enhance the removal of M. aeruginosa cells.

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“…The major chemical contaminants found in laundry and bathroom greywater are surfactants from shampoos, soap and detergents. Other sources include high levels of organic matter and turbidity due to suspended solids (Barişçi and Turkay, 2016). However, major share of greywater is produced in bathrooms (Noutsopoulos et al ., 2017).…”

Section: Characteristics Of Greywatermentioning

confidence: 99%

“…Table 3 shows the technologies utilized to treat greywater in various countries. Physical greywater treatment methods include filtration, screening and ultra‐filtration (UF) membranes (Barişçi and Turkay, 2016) and the chemical systems include ion exchange resins and coagulation/flocculation (Barişçi and Turkay, 2016), meanwhile, biological systems include activated sludge systems, constructed wetlands, rotating biological reactor (RBC), aerobic and anaerobic bio‐filters and membrane bioreactors (MBR) causes problems such as poor performance in sludge settling (Ramprasad et al ., 2017). The different treatment technologies used for the removal XOCs in various water matrix are illustrated in Table 4.…”

Section: Greywater Treatment Technologiesmentioning

confidence: 99%

“…The main advantage of this approach is the generation of NPs with defined size, dimension, composition and structure which is applied in numerous areas such as catalysis, drug delivery, data storage, imaging and sensing. Furthermore, the working principles in chemical synthesis can be anticipated easily (Barişçi and Turkay, 2016). Even though, the incorporation of the precursor material, polyvinyl alcohol in the synthesis of NPs for drug delivery is economical, but it causes cytotoxicity issue for healthy cells.…”

Section: Photocatalysis Technique For the Treatment Wastewatermentioning

confidence: 99%

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Photocatalysis of xenobiotic organic compounds in greywater using zinc oxide nanoparticles: a critical review

Yashni

Al‐Gheethi

Hossain

et al. 2020

Water & Environment J

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The direct discharge of raw bathroom greywater has increased the concentrations of various pollutants in the water bodies. Typically, greywater contains large quantities of xenobiotic organic compounds (XOCs) owing to an increase in consumption of personal care and bath products. Therefore, it urges for a suitable technology to eliminate these compounds from contaminated waters. Photocatalytic degradation using Zinc Oxide nanoparticles (ZnO NPs) has the potentiality to eliminate various XOCs. However, ZnO NPs have high tendency to aggregate, which may lower the photocatalytic degradation rate. Therefore, there is an urgency to modify ZnO NPs to overcome the limitation. The present review was conducted to determine a suitable method for the modification ZnO NPs. Besides, the potential of the modified ZnO NPs in degrading XOCs in greywater as a photocatalyst was also discussed.

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Domestic greywater treatment by electrocoagulation using hybrid electrode combinations

Cited by 79 publications

References 24 publications

Operating Cost and Treatment of Boron from Aqueous Solutions by Electrocoagulation in Low Concentration

Operating Cost and Treatment of Boron from Aqueous Solutions by Electrocoagulation in Low Concentration

Comparison of Different Anode Materials to Remove Microcystis aeruginosa Cells Using Electro-Coagulation–Flotation Process at Low Current Inputs

Photocatalysis of xenobiotic organic compounds in greywater using zinc oxide nanoparticles: a critical review

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