Decolorization and bioremediation of molasses wastewater by white-rot fungi in a semi-solid-state condition

Abstract

Molasses wastewater (vinasse; the by-product of distillation of fermented sugar) was decolorized and its chemical oxygen demand (COD) was reduced in static cultivation using the fungi Coriolus versicolor, Funalia trogii, Phanerochaete chrysosporium and Pleurotus pulmonarius ('Pleurotus sajorcaju'). The effect of cotton stalk on decolorizing and COD removing capability of four fungi was determined. In the entire concentration range tested (10-30%), wastewater was effectively decolorized by C. versicolor and F. trogii. Cotton stalk addition stimulated the decolorization activity of all fungi. The utilization of cotton stalk represents several advantages due to its function as an attachment place and as a source of nutrients; its use also reduces process costs.

Enhanced production of ligninolytic enzymes and decolorization of molasses distillery wastewater by fungi under solid state fermentation

“…2). Prior to this, Kahraman and Yesilada (2003) reported molasses decolorization in solid state cultivation by fungi Coriolus versicolor, Funalia trogii, P. chrysosporium and Pleurotus pulmonarius with cotton stalks being used as additional source of carbon. C. versicolor decolorized 48% of 30% diluted vinasse without any additional carbon source which increased to 71% on addition of cotton stalks.…”

Identification, Ligninolytic Enzyme Activity and Decolorization Potential of Two Fungi Isolated from a Distillery Effluent Contaminated Site

“…In the study this isolate gave significantly enhanced mushroom yield with increasing levels of effluent, with biological efficiency (BE) as high as 238.6% ). Prior to this, Kahraman and Yesilada (2003) have reported using Pleurotus pulmonarius 43% decolorization of 30% vinasses when cotton stalks were added as additional carbon source which stimulated the decolourization activity.…”

Development of a novel fungal consortium for the treatment of molasses distillery wastewater

“…Since, our objective was to Fig. 2 Change in COD and color of the undiluted distillery effluent over 40 days in the bioreactor achieve maximum decolorization of the effluent without any dilution, this was a significant achievement considering the fact that most of the previous studies have used a diluted effluent for decolorization studies (Kahraman and Yesilada 2003;D'souza et al 2006). Further, using several fungal strains together in a single bioreactor have the added advantage of benefiting from the different enzymatic mechanisms of different fungi, since each of the fungal strain used was found to be releasing one or two of the ligninolytic enzymes viz., lignin peroxidase (LiP; P. Pant and Adholeya 2007b, c).…”