Effect of transport phenomena of Cladosporium cladosporioides on decolorization and chemical oxygen demand of distillery spent wash

Abstract

The focus of this report is directed towards the influence of transport properties of fermentation broth in degradation and decolorization of distillery spent wash using Cladosporium cladosporioides. Batch experiment was conducted in a bioreactor for 7 days with 250 rpm at 35°C under optimum bioprocess conditions maintained using control system. Results of the morphological analysis revealed that C. cladosporioides has been observed to form mainly pellets during fermentation under mild agitation. The organism changed from filamentous form to pellet and then breaks, ending with filamentous form. All the models Power law, Bingham plastic, and Herschel-Bulkley fitted the general trend well with high R 2 values ranging from 0.9 to 0.98, indicating shear rate thinning nature of the broth. A maximum decolorization of 72.3 % was achieved with chemical oxygen demand reduction of 74.8 % due to the low viscous and pellet nature of the organism, leading to the transport properties of the fluid. Hence, transport phenomena channalyze the metabolic path way easily and leads to a novel approach for the industries to utilize the spent wash with minimum cost.

Prospection of Psychrotrophic Filamentous Fungi Isolated from the High Andean Paramo Region of Northern Ecuador: Enzymatic Activity and Molecular Identification

“…Exceptions were endoglucanase with the highest enzyme secretion at 48 h, β-xylosidase at 24 h, and xylanase at 72 h. Under static conditions, the strongest enzyme secretion was observed at 72-96 h for most enzymes with significantly lower activity values than under agitation conditions, which is coherent with the increased pellet formation observed by comparing the incubation flasks of C. Cladosporioides under static and agitation conditions (Figure S3g,h). This phenomenon was formerly described by Raikumar et al for this genus [55]. Xylanase was the only exception that performed better under static conditions at 72 h of incubation.…”

“…Furthermore, differential growth behavior was detected under static and agitation conditions (Figure S3g-i). Especially, the Cladosporium strains tended to grow better under agitation, developing a darker aspect apparently due to the stronger sporulation [55]. Meanwhile, its impact on Didymella was less evident.…”