Electrochemical oxidation and aerobic biodegradation with isolated bacterial strains for dye wastewater: Combined and integrated approach

Senthilkumar, S.; Basha, C. Ahmed; Perumalsamy, Muthiah; Prabhu, H. J.

doi:10.1016/j.electacta.2012.05.084

Cited by 44 publications

(20 citation statements)

References 34 publications

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“…6). The same result was observed by Senthilkumar et al [21] who studied combined treatment of dye wastewater. The reduction in ammonium is not affected by electro-coagulation pre-treatment at J = 23 A m −2 .…”

Section: Combined Leachate Treatment Processessupporting

confidence: 82%

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Combination of Electro-Coagulation and biological treatment by bioaugmentation for landfill leachate

Djelal

Lelievre

Ricordel

2014

Desalination and Water Treatment

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A B S T R A C TThis study examines the use of the coupling of electro-coagulation (EC) and biological treatment of mature landfill leachate from a non-hazardous waste storage characterized by a relatively low Chemical oxygen demand (COD) and a low BOD 5 /COD with a low biodegradability and a high level of inorganic compound such as NH þ 4 . During electrocoagulation treatment, a decrease in the chemical oxygen demand (COD) was shown with an increase in the current density. A toal of 33 and 56% COD removal were respectively obtained with 23 and 95 A m −2 . However, nothing was observed concerning the removal of ammonium. Nevertheless, biological treatment with or without addition of activated sludge (AS) has allowed the decrease in ammonium with a yield of 62% after 166 h. However, with the addition of activated sludge, the efficiency of nitrification is increased by 10%. As the bioaugmentation with AS has not improved the removal of organic matters and that the electrochemical treatment is not appropriate for removing NH 4 + , coupling treatment such as EC-biotreatment was envisaged. An integrated process involving electro-coagulation as pretreatment of biological treatment to treat mature leachate appeared therefore relevant in the tested conditions at 23 A m −2 with a 15 and 98% global removal, respectively, of COD and NH 4 + .

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Section: Combined Leachate Treatment Processessupporting

confidence: 82%

“…Furthermore, the combined electrochemical systems with biological treatment and AS showed interesting results on synthetic and industrial wastewater [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Combination of Electro-Coagulation and biological treatment by bioaugmentation for landfill leachate

Djelal

Lelievre

Ricordel

2014

Desalination and Water Treatment

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“…Different substitutions on aromatic nucleus give structurally diverse and most versatile group of compounds which makes them recalcitrant and xenobiotic (Ali 2010). These complex aromatic substituted structures make conjugated system and are responsible for intense colour, high water solubility, and resistance to degradation of azo dyes under natural conditions (Khan et al 2013;Senthikumar et al 2012). Figure 1 gives an illustration of the chemical structure of several azo dyes widely reported in the published literature.…”

Section: Introductionmentioning

confidence: 99%

Destruction of azo dyes by anaerobic–aerobic sequential biological treatment: a review

Popli

Patel

2014

Int. J. Environ. Sci. Technol.

257

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Dyes are synthetic organic compounds widely used in various industries such as, textile, leather, plastic, food, pharmaceutical, and paints manufacturing industries. Coloured effluents are highly toxic to the aquatic life and mutagenic to humans. Wastewater containing dyes has become an important issue demanding serious attention. Among the synthetic dyes, azo dyes are the largest and most widely used dyes and account for more than half of the annually produced dyes. The biodegradation of azo dyes is difficult due to their complex structure and synthetic nature. Several treatments have been proposed for efficient azo dye removal, most of them presenting some limitations such as generation of waste sludge, high operational costs, poor efficiency, and incomplete mineralization. Biological treatment is a cost-effective and eco-friendly process for dye degradation. Sequential anaerobic-aerobic biological treatment is considered as one of the most cost-effective methods for the complete mineralization of azo dyes. The anaerobic stage yields decolourization through reductive cleavage of the dye's azo linkages, resulting in the formation of generally colourless but potentially hazardous aromatic amines. The aerobic stage involves degradation of the aromatic amines. It is the most logical step for removing the azo dyes from the wastewater. Several factors can influence the microbial activity and consequently the efficacy and effectiveness of the complete biodegradation processes. This paper summarizes the results of biological decolourization of azo dyes using various types of reactors, elaborates biochemical mechanisms involved, and discusses influence of various operational parameters on decolourization based on reports published in the last decade.

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“…EO treatment together with biological oxidation was investigated in individual, combined and integrated methods [82]. It was observed that the combined process performed rather better than the individual, but took longer time.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Recent developments of electro-oxidation in water treatment — A review

Särkkä

Bhatnagar

Sillanpää

2015

Journal of Electroanalytical Chemistry

347

129

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Electrochemical oxidation and aerobic biodegradation with isolated bacterial strains for dye wastewater: Combined and integrated approach

Cited by 44 publications

References 34 publications

Combination of Electro-Coagulation and biological treatment by bioaugmentation for landfill leachate

Combination of Electro-Coagulation and biological treatment by bioaugmentation for landfill leachate

Destruction of azo dyes by anaerobic–aerobic sequential biological treatment: a review

Recent developments of electro-oxidation in water treatment — A review

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