Decolorization of molasses wastewater using an inorganic flocculant

Abstract

The removal of molasses-derived melanoidin in alcohol distillery wastes was studied using a commercial inorganic flocculant with a chemical formula of [Fe2(OH)n(SO4)3-n/2]m. Decolorization yields of 32, 87 and 94% were obtained for fresh slops and for biodigester and lagooned effluents, respectively, at a flocculant dosage of 4% v/v. The reduction in total organic carbon (TOC) was 21% for fresh slops and averaged to more than 73% for the biodigester and lagooned effluents. The presence of relatively high amounts of fluoride ions affected the decolorization of fresh slops; supplementing CaO at a rate of 30 g/l improved the decolorization of the distillery slops, resulting to 93% color removal. © 1993.

Source or Periodical Title

Journal of Fermentation and Bioengineering

ISSN

0922338X

Page

438-442

Document Type

Article

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