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Decolourization of anaerobically digested and polyaluminium chloride treated distillery spentwash in a fungal stirred tank aerobic reactor

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Title Decolourization of anaerobically digested and polyaluminium chloride treated distillery spentwash in a fungal stirred tank aerobic reactor
 
Creator SINGH, SS
DIKSHIT, AK
 
Subject WASTE-WATER
TRAMETES-VERSICOLOR
DECOLORIZATION
MOLASSES
FERMENTATION
MORPHOLOGY
GROWTH
Molasses spentwash
Decolourization
Aspergillus niger
Stirrer speed
Kinetic model
 
Description Decolourization of anaerobically digested and polyaluminium chloride treated distillery spentwash was studied in a fungal stirred tank aerobic reactor without dilution of wastewater. Aspergillus niger isolate IITB-V8 was used as the fungal inoculum. The main objectives of the study were to optimize the stirrer speed for achieving maximum decolourization and to determine the kinetic parameters. A mathematical model was developed to describe the batch culture kinetics. Volumetric oxygen transfer coefficient (k (L) a) was obtained using dynamic method. The maximum specific growth rate and growth yield of fungus were determined using Logistic equation and using Luedeking-Piret equation. 150 rpm was found to be optimum stirrer speed for overall decolourization of 87%. At the optimum stirrer speed, volumetric oxygen transfer coefficient (k (L) a) was 0.4957 min(-1) and the maximum specific growth rate of fungus was 0.224 h(-1). The values of yield coefficient (Y (x/s)) and maintenance coefficient (m (s)) were found to be 0.48 g cells (g substrate)(-1) and 0.015 g substrate (g cells)(-1) h(-1).
 
Publisher SPRINGER
 
Date 2012-06-26T05:23:53Z
2012-06-26T05:23:53Z
2011
 
Type Article
 
Identifier BIODEGRADATION,22(6)1109-1117
0923-9820
http://dx.doi.org/10.1007/s10532-011-9467-z
http://dspace.library.iitb.ac.in/jspui/handle/100/13960
 
Language English