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Kinetic modeling and parameter estimation in biological treatment of 2,4-dichlorophenol containing wastewater using rotating perforated tubes biofilm reactor

Paper ID Volume ID Publish Year Pages File Format Full-Text
18405 42721 2006 7 PDF Available
Title
Kinetic modeling and parameter estimation in biological treatment of 2,4-dichlorophenol containing wastewater using rotating perforated tubes biofilm reactor
Abstract

A recently developed rotating perforated tubes biofilm reactor (RTBR) was used for treatment of 2,4-dichlorophenol (DCP) containing synthetic wastewater. Effects of important operating variables such as A/Q ratio, feed wastewater DCP/COD ratio and DCP concentration on percent COD, DCP and toxicity removals were investigated. Percent COD, DCP and toxicity removals increased and effluent COD, DCP and toxicity levels decreased with increasing A/Q ratio because of larger biofilm surface area at high A/Q ratios. A/Q ratio above 130 m2 d m−3 resulted in more than 97% COD, DCP and toxicity removals when the feed COD and DCP contents were 5000 and 100 mg l−1, respectively. Increasing feed DCP concentrations did not affect percent DCP and toxicity removals considerably resulting in more than 97% removals for the feed DCP up to 393 mg l−1. However, percent COD removal decreased with increasing feed DCP content probably because of natural selection of DCP degrading organisms and potential inhibitory effects of DCP degradation products on COD removing microorganisms. A kinetic model describing the COD removal rate was developed and the kinetic constants were determined by using the experimental data. Kinetic model estimations of the system performance were in good agreement with the experimental data.

Keywords
Biological treatment; 2,4-Dichlorophenol (DCP); Kinetic model; Rotating tubes biofilm reactor; Toxicity removal
First Page Preview
Kinetic modeling and parameter estimation in biological treatment of 2,4-dichlorophenol containing wastewater using rotating perforated tubes biofilm reactor
Publisher
Database: Elsevier - ScienceDirect
Journal: Enzyme and Microbial Technology - Volume 38, Issue 6, 1 April 2006, Pages 860–866
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering