Decolorization of molasses wastewater using an inorganic flocculant

Migo, Veronica P.; Matsumura, Masatoshi; Rosario, E. J. del; Kataoka, Hiroshi

doi:10.1016/0922-338x(93)90092-m

Cited by 108 publications

(55 citation statements)

References 6 publications

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“…Currently, the decolorization of melanoidins in wastewater is based mainly on physical and chemical methods such as ozonization, flocculation, chemical coagulation, precipitation, activated carbon adsorption and advanced oxidation of the wastewater [4,17,25,28,39]. However, the implement of physical and chemical methods eventually may generate significant amount of sludge, cause secondary pollution due to excessive chemical usage, and have some drawbacks such as high cost, formation of hazardous by-products and intensive energy consumption.…”

Section: Introductionmentioning

confidence: 99%

Decolorization of synthetic melanoidins-containing wastewater by a bacterial consortium

Jiranuntipon

Chareonpornwattana

Damronglerd

et al. 2008

J Ind Microbiol Biotechnol

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The presence of melanoidins in molasses wastewater leads to water pollution both due to its dark brown color and its COD contents. In this study, a bacterial consortium isolated from waterfall sediment was tested for its decolorization. The identification of culturable bacteria by 16S rDNA based approach showed that the consortium composed of Klebsiella oxytoca, Serratia mercescens, Citrobacter sp. and unknown bacterium. In the context of academic study, prevention on the difficulties of providing effluent as well as its variations in compositions, several synthetic media prepared with respect to color and COD contents based on analysis of molasses wastewater, i.e., Viandox sauce (13.5% v/v), caramel (30% w/v), beet molasses wastewater (41.5% v/v) and sugarcane molasses wastewater (20% v/v) were used for decolorization using consortium with color removal 9.5, 1.13, 8.02 and 17.5%, respectively, within 2 days. However, Viandox sauce was retained for further study. The effect of initial pH and Viandox concentration on decolorization and growth of bacterial consortium were further determined. The highest decolorization of 18.3% was achieved at pH 4 after 2 day of incubation. Experiments on fresh or used medium and used or fresh bacterial cells, led to conclusion that the limitation of decolorization was due to nutritional deficiency. The effect of aeration on decolorization was also carried out in 2 L laboratory-scale suspended cell bioreactor. The maximum decolorization was 19.3% with aeration at KLa = 2.5836 h -1 (0.1 vvm).

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Section: Introductionmentioning

confidence: 99%

Decolorization of synthetic melanoidins-containing wastewater by a bacterial consortium

Jiranuntipon

Chareonpornwattana

Damronglerd

et al. 2008

J Ind Microbiol Biotechnol

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“…Migo et al [13] reported decolorization of molasses wastewater using polyferric sulfate. Ryan et al [14] compared electrocoagulation with coagulation in the effectiveness of removing residual color and COD from molasses process water.…”

Section: Introductionmentioning

confidence: 99%

Coagulation removal of melanoidins from biologically treated molasses wastewater using ferric chloride

Liang

Wang

Zhou

et al. 2009

Chemical Engineering Journal

100

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“…Distillery slops is a heavily colored wastewater with a high organic content, attributed to the presence of the high molecular weight polymer melanoidin, which is a highly dispersed colloid. 13 Anaerobic treatment of these wastewaters reduces the organic loading only up to a certain limit. In order to improve organic removal, pretreatment by chemical methods such as ozonation 14 as well as physico-chemical approaches particularly by precipitation and then flocculation have been employed.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous treatment of semiconductor wastewater and distillery slops by mixing and precipitation/coagulation

Navarro

Alfafara

et al. 2005

J of Chemical Tech & Biotech

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Organic matter (chemical oxygen demand, COD) removal with decolorization in waste distillery slops and copper removal in a semiconductor industry wastewater were achieved in a single step mixing and precipitation/coagulation treatment system. The process utilized the complementary properties of the positively charged copper ions in semiconductor wastewater and net negative charge of melanoidin (organic chromophoric pollutant) in distillery slops to mutually neutralize each other. Copper ions served as coagulant for slops and melanoidin served as precipitant for copper. The volumetric ratio of the wastewater and pH were optimized to attain maximum removal of organic matter and copper. The optimum volumetric ratio for the evaluated semiconductor wastewater to distillery slops was found to be 2-3 with an equilibrium pH of around pH 6. At optimum conditions, average removals of COD and copper were 86% and 92%, respectively, in an actual and undiluted system. Decolorization efficiency using the diluted distillery slops was 89%. The process can be considered an effective pretreatment procedure for simultaneous gross removal of copper and color/COD, particularly in highly concentrated waste streams.

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Decolorization of molasses wastewater using an inorganic flocculant

Cited by 108 publications

References 6 publications

Decolorization of synthetic melanoidins-containing wastewater by a bacterial consortium

Decolorization of synthetic melanoidins-containing wastewater by a bacterial consortium

Coagulation removal of melanoidins from biologically treated molasses wastewater using ferric chloride

Simultaneous treatment of semiconductor wastewater and distillery slops by mixing and precipitation/coagulation

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