Studies on electrode combination for COD removal from domestic wastewater using electrocoagulation

Bote, Million Ebba

doi:10.1016/j.heliyon.2021.e08614

Cited by 32 publications

(7 citation statements)

References 32 publications

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“…It could be shown that the Fe–Fe electrode combination provides the highest removal rate with 90% COD removal efficiency. [ 34 ] Taken together, several studies investigated the electrocoagulation process for domestic wastewater treatment, however, a direct comparison of batch and continuous system operation using the same electrode material is missing. This study has the potential to fill this gap in the literature.…”

Section: Resultsmentioning

confidence: 99%

Comparison of Treatment Efficiency and Energy Consumption of Batch and Continuous Electrocoagulation in Urban Wastewater

Yılmaz

Sağsöz

Fìl

et al. 2022

CLEAN Soil Air Water

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In this study, domestic wastewater was used as the electrolyte. The work was carried out with an up-flow tubular reactor, made of stainless steel that was used as cathode, while the anode electrode material was aluminum and varying values of flow regime (25, 50, 75 and 100 mL/s for continuous system), initial pH value (5, 6, 7 and 7.8) and current intensity (10, 15 and 20 A) were applied. For domestic wastewater with natural pH, the effluent pH was >9 in the batch system, while in the continuous system the pH was 8-8.5. Likewise, while the effluent temperature was up to 60°C in the batch system, it was at most 35°C in the continuous system. However, the energy consumption values in the continuous system were considerably lower compared with the batch system. At a current intensity of 10 A, 80 kWh of energy per unit volume was consumed in the batch system, while it was 50 kWh for the continuous system. The present results show that the batch system can be used for small wastewater streams whereas the continuous system can be used for large wastewater streams for domestic wastewater treatment.

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Section: Resultsmentioning

confidence: 99%

Comparison of Treatment Efficiency and Energy Consumption of Batch and Continuous Electrocoagulation in Urban Wastewater

Yılmaz

Sağsöz

Fìl

et al. 2022

CLEAN Soil Air Water

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“…The biotreated wastewater was already characterized with a low COD load (90.6 mg/L) as compared with the primary clarified wastewater. Bote et al (2021) also reported comparable COD removal (67% -83%) efficiency from the domestic wastewater following 45 -60 minutes of electrocoagulation with Fe-Fe electrodes (12) . The electrocoagulation resulted in 79.5% and 87.9% removal of BOD from the primary clarified and biotreated wastewaters, respectively (Figure 2).…”

Section: Bod and Cod Removalmentioning

confidence: 90%

Pollution Load Reduction from Domestic Wastewater with Electrocoagulation Process for Agricultural Reuse

Sushila,

Kumar

2024

IJST

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Objectives: The present study is aimed to investigate electrocoagulation of domestic wastewater and assessment of pollutants removal efficiency for potential reuse in agriculture. Methods: The electrocoagulation treatment of domestic wastewater with Fe – Fe electrodes was performed under optimal conditions of pH (8.0), current density (0.6 mA/cm2), treatment time (45 minutes), and NaCl dose (2.8 g/L) in a slurry type of reactor. The primary clarified and biotreated domestic wastewaters were subjected to electrocoagulation with Direct Current (DC) as power source. Findings: There was observed higher pollutants removal efficiency from the biotreated wastewater as compared with the primary clarified wastewater after electrocoagulation. The treated wastewaters showed significant removal of pollutants in terms of BOD (79.5% – 87.9%), COD (86.8% – 89.5%), TDS (87.4% – 89.9%), TSS (66.7% – 75.3%), conductivity (77.8% – 78.4%), turbidity (74% – 81.2%), colour (77.7% – 86.2%), nitrates (44.1% – 51.7%), and phosphates (48.7% – 55.9%) after electrocoagulation treatment. Electrocoagulation considerably improved the biodegradability index of the primary clarified (0.59 to 0.92) and biotreated (0.69 to 0.8) wastewaters. This indicates easy removal of the pollutants further by biological processes in the aquatic ecosystems. Electrocoagulation demonstrated potential for removal of pollution from the domestic wastewater for productive reuse in agriculture and urban areas. Novelty: There exist few studies of use of electrochemical process for treatment and reuse of domestic wastewater. The treated waters complied with the regulatory standards and had satisfactory quality for reuse in agriculture and urban activities. Keywords: Electrocoagulation, Domestic wastewater, Biodegradability index, Agricultural reuse, National Green Tribunal

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“…The above proves that the combination of electrocoagulation and ozonation is more effective compared to ozonation itself (Li et al 2013). In the electrocoagulation process, Aluminum hydroxide coagulants are formed from Al 3+ and OHand also Iron hydroxide derived from Fe 2+ and OHto destabilize pollutants in wastewater [21]. Likewise with the combination of electrocoagulation and ozonation, coagulants formed from electrocoagulation and reactive oxygen species derived from ozonation become intermediaries to remove pollutants both organic and inorganic [12].…”

Section: Codmentioning

confidence: 99%

The Efficiency of Reducing COD and Turbidity of Tofu Wastewater using A Combination of Electrocoagulation and Ozone

Oktiawan

Samadikun

Ashari

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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We present an investigation of tofu wastewater that contains organic substances that can cause rapid microbial growth in the water. It can lead to a decrease in oxygen levels. In addition, tofu wastewater also contains suspended substances that cause turbidity. This study aims to evaluate changes in pH, temperature, and efficiency of reducing turbidity & chemical oxygen demand (COD) of tofu wastewater using a combination of electrocoagulation and ozone. This research method was carried out on a laboratory scale using tofu wastewater. The ozone generator is used for ozonising tofu wastewater and an acrylic batch type electrochemical reactor. The electrode material used for the anode and cathode is made of aluminum and iron sheets. There were also differences in the highest turbidity removal of 78.3% at the 60 th min when the wastewater was treated using a combination of electrocoagulation followed by ozone. The highest COD removal of 51.9% resulted from the treatment of tofu wastewater using ozone for 60 min. The initial temperature was 27.6°C then increased by 28.1°C (1.8%). Combination of electrocoagulation followed by ozone was more effective in reducing pollutants in tofu wastewater.

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Studies on electrode combination for COD removal from domestic wastewater using electrocoagulation

Cited by 32 publications

References 32 publications

Comparison of Treatment Efficiency and Energy Consumption of Batch and Continuous Electrocoagulation in Urban Wastewater

Comparison of Treatment Efficiency and Energy Consumption of Batch and Continuous Electrocoagulation in Urban Wastewater

Pollution Load Reduction from Domestic Wastewater with Electrocoagulation Process for Agricultural Reuse

The Efficiency of Reducing COD and Turbidity of Tofu Wastewater using A Combination of Electrocoagulation and Ozone

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