Record Details

Adsorption and biological decolourization of azo dye reactive red 2 in semicontinuous anaerobic reactors

DSpace at IIT Bombay

View Archive Info
 
 
Field Value
 
Title Adsorption and biological decolourization of azo dye reactive red 2 in semicontinuous anaerobic reactors
 
Creator MAAS, ROBERT
CHAUDHARI, SANJEEV
 
Subject azo dyes
adsorption
degradation
bioreactors
methane
biomass
 
Description The microbial decolourization of Reactive Red 2 (RR2) dye has been studied under anaerobic conditions. Three semicontinuous bioreactors were operated with dye concentrations—R1 (control: 0 mg RR2 l−1), R2 (100 mg RR2 l−1) and R3 (200 mg RR2 l−1). The parameters monitored were, oxidation–reduction potential (ORP), methane production, colour and chemical oxygen demand (COD) removal during the feeding cycles. The oxidation–reduction potential values for the first few days were above −150 mV, which later on decreased to less than −275 mV in all the reactors. Colour removal during the first few days of operation was due to adsorption of dye on to anaerobic biomass. However, under steady state conditions, colour removal was above 76% for both the dye containing reactors and it was due to biologically mediated degradation. Methane production and chemical oxygen demand removal in the control and dye containing reactors were almost the same. Integrated analysis of the monitored parameters indicated that, the primary mechanism of colour removal was adsorption of RR2 on to anaerobic biomass and subsequent degradation. Decolourization rates were found to be first order with respect to dye concentration, although an increase in the influent dye concentration resulted in a decrease in the rate from 0.0074 (g volatile suspended solid, VSS)−1 h−1 (100 mg RR2 l−1) to 0.0039 (g VSS)−1 h−1 (200 mg RR2 l−1). Based on total methane production no inhibition effect of dyes was observed but total methanogenic activity (TMA) results exhibited inhibition of methanogenesis.
 
Publisher Elsevier
 
Date 2009-09-19T08:48:51Z
2011-11-25T15:33:40Z
2011-12-26T13:04:51Z
2011-12-27T05:50:53Z
2009-09-19T08:48:51Z
2011-11-25T15:33:40Z
2011-12-26T13:04:51Z
2011-12-27T05:50:53Z
2005
 
Type Article
 
Identifier Process Biochemistry 40(2), 699-705
1359-5113
http://dx.doi.org/10.1016/j.procbio.2004.01.038
http://hdl.handle.net/10054/1656
http://dspace.library.iitb.ac.in/xmlui/handle/10054/1656
 
Language en