Removal of COD from laundry wastewater by electrocoagulation/electroflotation

Wang, Chih-Ta; Chou, Wei‐Lung; Kuo, Yi‐Ming

doi:10.1016/j.jhazmat.2008.07.122

Cited by 237 publications

(91 citation statements)

References 35 publications

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“…These species contain a relatively high oxidative potential, which allows for further degradation of organic pollutants in the wastewater stream. In research presented by many scientists, electrocoagulation is described as the treatment of laundry effluent [42][43][44]. Iron and aluminium electrodes are used for electrocoagulation; however, aluminium electrodes had a greater efficiency in removal of pollutants from the laundry wastewater.…”

Section: Application Of Biological and Electrocoagulative Treatment Mmentioning

confidence: 99%

“…Iron and aluminium electrodes are used for electrocoagulation; however, aluminium electrodes had a greater efficiency in removal of pollutants from the laundry wastewater. Some investigations applied an ultrasonic bath during electrocoagulation which had a profound effect on the efficiency of the removal [42].…”

Section: Application Of Biological and Electrocoagulative Treatment Mmentioning

confidence: 99%

“…The measured parameters of phosphorous levels, detergent, COD, turbidity and conductivity in the laundry wastewater before and after the process of electrocoagulation are good indicators of the effectiveness of the electrocoagulative process [42][43][44].…”

Section: Application Of Biological and Electrocoagulative Treatment Mmentioning

confidence: 99%

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Electrocoagulative and Biological Treatment of Laundry Wastewater

Ramcharan¹,

Bissessur²

2017

Biological Wastewater Treatment and Resource Recovery

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The greater demand for potable water, both locally and worldwide, has directed a huge interest amongst researchers to investigate the possibility of recycling and reusing wastewater from laundry run-offs. The advantage of using recycling wastewater from such sources is mainly due to the fact that these bulk volumes of wastewater are considered to be less chemically polluted in comparison to those discarded from industrial effluents and wastewater sources. Almost all laundry detergents contain surfactants, whose main function serves to remove dirt/soil from contaminated items. Thus, an analysis of the surfactant levels before and after a treatment process is important to confirm that the surfactant has in fact carried out its intended purpose. Electrocoagulative treatment of wastewater, a well-researched and well-documented clean-up process that involves the production of aluminium hydroxy species by oxidation of aluminium metal upon the application of a controlled voltage which adsorbs fine particulate matter and pollutants from the wastewater has been investigated as a clean-up application to the treatment of laundry wastewater. The use of a biological treatment process which entails treating the wastewater with aerobic bacterial specie specifically designed to degrade fats, lipids, protein, detergents and hydrocarbons has also been investigated.

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Section: Application Of Biological and Electrocoagulative Treatment Mmentioning

confidence: 99%

Section: Application Of Biological and Electrocoagulative Treatment Mmentioning

confidence: 99%

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Electrocoagulative and Biological Treatment of Laundry Wastewater

Ramcharan¹,

Bissessur²

2017

Biological Wastewater Treatment and Resource Recovery

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“…The EC process has many advantages like simple equipment requirement, easy operation, no chemical use requirement, rapid sedimentation, sludge stability, low sludge production, and environmental compatibility. It has successfully been employed for the treatment of different wastewaters such as from hospitals [12], baker's yeast [13], laundries [14], biodiesel [15,16], and slaughter houses [17], wastewaters including surfactants [18], fluoride [19] and heavy metal-containing solutions [20,21]. Different technological processes such as adsorption [22], biodegradation [23,24], nanofiltration [25], electrocoagulation, electrochemical reduction and oxidation, indirect electro-oxidation with strong oxidants, and photocatalytic degradation [26,27], for the removal of pesticides have been reported recently.…”

Section: Introductionmentioning

confidence: 99%

Removal of Imidacloprid Pesticide by Electrocoagulation Process using Iron and aluminum Electrodes

Ghalwa¹

2015

J Environ Anal Chem

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“…34 Os resultados também mostraram que uma das maiores vantagens da ECF é na remoção de óleos e graxas, com remoção média acima de 93%. Esse fato ocorre devido a uma melhor interação dessas moléculas com o hidróxido de alumínio, facilitando, assim, a coagulação e a flotação dessas moléculas através da formação de coloides cuja densidade é menor que a da água.…”

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Processo De Eletrocoagulação-Flotação: Investigação Dos Parâmetros Operacionais Para O Tratamento De Águas Residuais Da Indústria De Pescados

João¹,

Emerick²,

Filho³

et al. 2017

Quim. Nova

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The objective of this study was the utilization of an electrocoagulation-flotation process to evaluate the treatment of a real wastewater from fish industries (Brazil -SC). This type of effluent is usually treated by conventional processes, which are often not sufficient to meet the desired final quality of legal environmental requirements. The effect of current density, pH and treatment time was evaluated. The best experimental conditions for the process were current of 5 A, potential of 15 V and distance between electrodes equal to 10 mm. Under these conditions, the removal of the contaminants were expressive for all analyzed parameters as follows: average color reduction of 95.5%; turbidity of 96.9%; COD 93.3; BOD5 of 97.5%; phosphorus of 88.5% and oils and greases of 93.6%.Keywords: electrochemical process; electrocoagulation; wastewater; fish industry. INTRODUÇÃOO fornecimento de água limpa à população constitui um dos grandes desafios contemporâneos. O abastecimento de água potável é crítico, especialmente nos países subdesenvolvidos.1 Rios, canais e outros corpos de água são constantemente poluídos devido à descarga indiscriminada de águas residuais (efluentes líquidos).2 Países altamente desenvolvidos, como os EUA, também se defrontam com problemas relacionados ao abastecimento de água, o que por sua vez instiga o reaproveitamento de águas residuais.3 Dessa forma, cria-se uma demanda por metodologias mais eficazes e baratas para o tratamento de águas residuais diante das tecnologias tradicionais existentes. 4 Contudo, muitas vezes as propriedades ou características das águas residuais industriais variam largamente de uma indústria para outra, e também na mesma indústria, dependendo de fatores como a variabilidade da matéria-prima.5 Para a maioria das indústrias de beneficiamento, as operações produzem águas residuais que contêm contaminantes orgânicos e inorgânicos solúveis, partículas coloidais e sólidos suspensos. Dependendo do tipo de operação, o grau de contaminação pode variar largamente entre baixo, médio ou alto. 6 Águas residuais industriais contaminadas por compostos orgânicos são tratadas, comumente, através de sistemas biológicos, amplamente utilizados para o tratamento de efluentes líquidos lançados nos sistemas fluviais e marinhos.7 O tratamento biológico possui, entretanto, algumas desvantagens, dentre as quais se destacam a grande área ocupada pelos sistemas convencionais de tratamento biológico (várias lagoas aeróbias, anaeróbias e facultativas), a exalação de odores desagradáveis e sua total inutilidade na presença de resíduos que contenham substâncias nocivas aos microorganismos (pouco biodegradáveis ou não biodegradáveis). 8 As desvantagens apresentadas justificam a investigação de novos métodos.A indústria de beneficiamento de pescados representa um exemplo de geração de águas residuais contaminadas por compostos orgânicos. Esse setor é associado à produção de grandes volumes de efluentes, que apresentam alta carga de matéria orgânica, elevada turbidez, forte coloração amarelada e odo...

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Removal of COD from laundry wastewater by electrocoagulation/electroflotation

Cited by 237 publications

References 35 publications

Electrocoagulative and Biological Treatment of Laundry Wastewater

Electrocoagulative and Biological Treatment of Laundry Wastewater

Removal of Imidacloprid Pesticide by Electrocoagulation Process using Iron and aluminum Electrodes

Processo De Eletrocoagulação-Flotação: Investigação Dos Parâmetros Operacionais Para O Tratamento De Águas Residuais Da Indústria De Pescados

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