Decolorization of distillery spent wash effluent by electro oxidation (EC and EF) and Fenton processes: A comparative study

David, Charles; Arivazhagan, M.; Tuvakara, Fazaludeen

doi:10.1016/j.ecoenv.2015.04.038

Cited by 61 publications

(13 citation statements)

References 22 publications

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“…It is a recalcitrant, antioxidant, acidic, nitrogen-containing dark brown polymeric compound (David et al, 2015). The molecular weight of melanoidin is estimated to be between of 5 000 and 40 000 Da, having an empirical formula of C 17-18 H 26-27 O 10 N (Krishna Prasad and Srivastava, 2009).…”

Section: Adsorbent Developmentmentioning

confidence: 99%

“…Bioenergy is the carbonneutral and renewable energy resource that can be converted into any form of fuel for utilization. Globally, ethanol distillery industries are growing rapidly to satisfy the increasing demand for sustainable and renewable biofuel, particularly bioethanol (David et al, 2015). The estimated global demand for bioethanol in 2020 will rise beyond 1.2 × 10 11 L and molasses make up the largest portion of the feedstock for distillery industries, as indicated by Arimi et al (2015).…”

Section: Introductionmentioning

confidence: 99%

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COD and colour removal from molasses spent wash using activated carbon produced from bagasse fly ash of Matahara sugar factory, Oromiya region, Ethiopia

Nure¹,

Shibeshi²,

Leta³

et al. 2017

WSA

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The aim of this study was to investigate the removal of chemical oxygen demand (COD) and colour from a melanoidin solution using activated carbon produced from bagasse fly ash (BFA). Melanoidins are heterogeneous polymers and major contributors to the dark brown colour of molasses spent wash, which is an extensive cause of environment pollution. The surface area of the BFA was determined as 160.9 ± 2.8m²/g with 90% of particle less than 156.8 µm in size. Characterization of the BFA by Fourier transform infrared spectroscopy (FTIR) showed the presence of hydroxyl and carbonyl functional groups, whereas X-ray diffraction analysis indicated its amorphous nature. Moreover, scanning electron microscopy analysis showed a heterogeneous and irregular shape of pores. Among the adsorption isotherm models analysed, the Freundlich model fitted best to the experimental data, indicating a maximum adsorptive capacity of 124.80 mg/g. The removal of COD and colour from a melanoidin solution with this activated carbon was carried out using an experimental design taking 4 factors into account. These were adsorbent dose, contact time, pH and initial COD concentration, with removal of COD and colour as response variables. COD reduction was influenced by initial COD concentration whereas colour removal was dominated by contact time, which was in line with the findings of principal component analysis . The maximum COD removal recorded was 61.6% at the optimum condition of adsorbent dose of 4 g in 100 mL, contact time of 4 h, pH 8 and initial COD concentration 6 000 mg/L, whereas the decolourization of melanoidin solution was 64% at adsorbent dose of 4 g, contact time 4 h, pH 3 and initial COD concentration 6 000 mg/L. Hence, activated BFA is a promising option for simultaneous removal of COD and colour from molasses spent wash under the stated conditions.

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Section: Adsorbent Developmentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

COD and colour removal from molasses spent wash using activated carbon produced from bagasse fly ash of Matahara sugar factory, Oromiya region, Ethiopia

Nure¹,

Shibeshi²,

Leta³

et al. 2017

WSA

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“…The current density increment increases the hydroxyl radical production in the electrolyte (David et al . ). Moreover, the current density increment facilitates Fe 3+ change to Fe 2+ .…”

Section: Resultsmentioning

confidence: 97%

“…It means that an increase in current density improves COD removal up to the optimum value. The current density increment increases the hydroxyl radical production in the electrolyte (David et al 2015). Moreover, the current density increment facilitates Fe 3+ change to Fe 2+ .…”

Section: Discussionmentioning

confidence: 99%

An efficient technique for dairy wastewater treatment

Davarnejad

Nikseresht

Ajideh

2017

Int J of Dairy Tech

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The aim of this study was to consider the efficiency of the electro‐Fenton process for organic compound reduction in an industrial dairy effluent. Experiments were conducted to evaluate the effect of several parameters, such as reaction time, pH, H2O2/Fe2+ molar ratio and volume fraction of H2O2 to dairy wastewater (mL/L), on the process performance. The Taguchi technique was applied to investigate the optimum operating conditions. The optimum chemical oxygen demand removal (93.24%) was experimentally obtained at a pH value of 7.58, reaction time of 87.13, current density of 58.5, H2O2/Fe2+ molar ratio of 3.62 and volume fraction of H2O2 to dairy wastewater of 1.39 mL/L.

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“…These metal ions of iron or aluminum anodes produce insoluble Fe(OH) 3 and Al(OH) 3 flocs, which are pH dependent [23][24][25] , which remove dissolved inorganic and organic compounds by surface complexation or electrostatic attraction.…”

Section: The Electrocoagulation Methods (Ec) Is a Simple And Efficientmentioning

confidence: 99%

Elimination of Industrial Textile Dye by Electrocoagulation Using Iron Electrodes

Vidal

Espinoza

Contreras

et al. 2017

J. Chil. Chem. Soc.

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Electrocoagulation is a promising technique for the treatment of wastewater like the produced by the textile industry, which generates large volumes of water containing dyes. Thus, synthetic samples of the textile dye acid black 194 (AB194, CI 22910) were treated by this method using iron anodes at two different initial pH values. Tafel studies in the presence and absence of the dye were performed.The complete removal of AB194 from 1.0 L of solution in a static cell was achieved, at short electrolysis times, applying low-density currents at two different initial pH values.In addition, the operating costs by mass consumed anode, per cubic meter electocoagulated and per TOC unit, were assessed to help determine the most efficient conditions, considering a future application of the method in the industry.

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Decolorization of distillery spent wash effluent by electro oxidation (EC and EF) and Fenton processes: A comparative study

Cited by 61 publications

References 22 publications

COD and colour removal from molasses spent wash using activated carbon produced from bagasse fly ash of Matahara sugar factory, Oromiya region, Ethiopia

COD and colour removal from molasses spent wash using activated carbon produced from bagasse fly ash of Matahara sugar factory, Oromiya region, Ethiopia

An efficient technique for dairy wastewater treatment

Elimination of Industrial Textile Dye by Electrocoagulation Using Iron Electrodes

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