Optimizing TOC and COD removal for the biodiesel wastewater by electrocoagulation

Tanatti, N. Pınar; Şengi̇l, I. Ayhan; Özdemir, Abdil

doi:10.1007/s13201-018-0701-2

Cited by 21 publications

(8 citation statements)

References 16 publications

(23 reference statements)

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“…After approximately 40 min, the HA removal rate was approximately 95% for all samples, except for those with NaCl concentration of 0.5 g/L. This phenomenon can be explained by the higher ion concentration in the solution, which significantly increases the conductivity, thereby significantly improving the transfer rate of electrons on the electrode surface (Tanattı et al 2018). Correspondingly, the dissolution rate of the anode also increases, as well the amount of aluminum flocculant.…”

Section: Ha Removalmentioning

confidence: 83%

Optimum parameters for humic acid removal and power production by Al–air fuel cell electrocoagulation in synthetic wastewater

Wei

Gong

Sheng

et al. 2021

Water Science and Technology

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Although humic acid (HA) is a complex natural organic matter, it can potentially harm the environment and human health. In this study, aluminum–air fuel cell electrocoagulation (AAFCEC) was used to remove HAs from water while generating electricity. Initial pH, electrolyte concentration, HA concentration electrode distance and external resistance were investigated to determine the power generation and removal efficiency. The results showed that the better performance of power generation has been acquired in the alkaline solution and larger electrolyte concentration and short electrode distance. Further, Al–Ferron complexation timed spectrophotometry was used to determine the Al speciation distribution in the solution under different parameters. The power density of the cell reached 313.47 mW/cm2 for the following conditions: 1 g/L NaCl concentration, 3 cm electrode distance, 20 Ω external resistor, and pH 9. After about an hour electrolysis, the optimum removal rate of HA was above 99%. The results demonstrated that the AAFCEC is an efficient and eco-friendly water treatment process, and it could be further developed and disseminated in the rural areas and households.

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Section: Ha Removalmentioning

confidence: 83%

Optimum parameters for humic acid removal and power production by Al–air fuel cell electrocoagulation in synthetic wastewater

Wei

Gong

Sheng

et al. 2021

Water Science and Technology

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“…Our findings are in good concordance with those reported by Tak et al [39] who confirmed that an increase of electrolysis time from 10 to 20 min resulted in an increase of COD removal rate from 84 to 88.5% and optimal efficiency of 93.2% was achieved during 30 min. Another study [43] showed that the removal efficiency of COD increased from 59.72 to 91.32% in the interval time of 0.5-5 min and the optimum electrolysis time was found to be only 1 min. It is important to underline that the electrolysis time obtained in our study (5 min) is more economical when it is compared to other studies [37,38,40].…”

Section: Effect Of Charge Loadingmentioning

confidence: 98%

Performance Assessment of Wastewater Treatment Plants (WWTPs ) and Application of Electrocoagulation Process to Improve Their Operation

Tertouche¹,

Bellebia²,

Bengharez³

et al. 2021

Pol. J. Environ. Stud.

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The present study aimed to assess the efficiency of two wastewater treatment plants (WWTPs) operating with different biological processes and to investigate the electrocoagulation process as alternative to improve their operation.Results revealed the consistent efficiency of urban WWTP that uses activated sludge process, the station operated with removal efficiencies higher than 91% for biological oxygen demand (BOD), chemical oxygen demand (COD) and total suspended solids (TSS) and produced high quality effluent whereas the efficiency of WWTP of an industrial complex using trickling filter process was in the monitored period very small and did not meet the minimum acceptable treatment efficiency of discharged wastewater. The treatment assays with electrocoagulation process using aluminium electrodes exhibited high COD removal particularly for plant of industrial site, the optimal operating conditions for the maximum COD removal are found to be the initial pH of 3, current density of 29.79 mA/cm 2 , electrolysis time of 5 min and charge loading of 26.11 F/m 3 . Under these conditions, the removal efficiency of COD is found to be 79% . Consequently, electrocoagulation process can be recommended to improve the performance of WWTPs. Nonetheless, the implementation of EC into industrial or municipal systems should be investigated more.

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“…Because of the high pollution load of raw biodiesel wastewater and high amount of oil in water, it is difficult to treat with oxidation processes without pre-treatment. Even though high removal efficiencies have been obtained with the EC process, COD values decreased to 24,000-18,800 mg/L [41,42]. And discharge standards cannot be achieved.…”

Section: Ec Of Biodiesel Wastewatermentioning

confidence: 98%

“…The experimental system employed that was similar to ones used in our previous study [41]. EC experiments were conducted in a 250 ml bipolar batch reactor.…”

Section: Ec Of Biodiesel Wastewatermentioning

confidence: 99%

Kinetics and thermodynamics of biodiesel wastewater treatment by using ozonation process

Tanatti¹,

Mehmetbașoğlu²,

Şengi̇l³

et al. 2019

Desalination and Water Treatment

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Biodiesel wastewaters contain high amounts of oil, methanol, soap and glycerin. These wastewaters pollutant concentrations as chemical oxygen demand (COD), total organic carbon (TOC), glycerin and MeOH are fluctuating in the ranges of 250,000-450,000 mg/L, 54,000-110,000 mg/L, 800-1,500 mg/L, and 6,000-15,000 mg/L, respectively. Biodiesel wastewaters lead to blockage of oil drainage systems and reduction of biological activity in biological treatment systems. The purpose of this study was to treat wastewater by ozonation after the electrocoagulation process as pre-treatment. In the ozonation process, the initial wastewater pH value was 13.9, ozone dose was 1.5g/L h, reaction time was 7 h and reaction temperature was 45°C. As a result of 7 h of ozonation, 98.64% of COD, 97.48% of TOC and 99.37% of MeOH removal efficiencies achieved. With these results, biodiesel waste water can be discharge to into the receiving environment according to standards.

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Optimizing TOC and COD removal for the biodiesel wastewater by electrocoagulation

Cited by 21 publications

References 16 publications

Optimum parameters for humic acid removal and power production by Al–air fuel cell electrocoagulation in synthetic wastewater

Optimum parameters for humic acid removal and power production by Al–air fuel cell electrocoagulation in synthetic wastewater

Performance Assessment of Wastewater Treatment Plants (WWTPs ) and Application of Electrocoagulation Process to Improve Their Operation

Kinetics and thermodynamics of biodiesel wastewater treatment by using ozonation process

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