Effect of initial biomass concentration on bioregeneration of 4-chlorophenol-loaded granular activated carbon: kinetic and efficiency studies
Article first published online: 1 NOV 2012
© 2012 Society of Chemical Industry
Journal of Chemical Technology and Biotechnology
Volume 88, Issue 6, pages 1157–1163, June 2013
How to Cite
Oh, W.-D., Lim, P.-E., Seng, C.-E., Mohamed, N., Adnan, R., Leong, K.-Y. and Voon, S.-Y. (2013), Effect of initial biomass concentration on bioregeneration of 4-chlorophenol-loaded granular activated carbon: kinetic and efficiency studies. J. Chem. Technol. Biotechnol., 88: 1157–1163. doi: 10.1002/jctb.3960
- Issue published online: 14 MAY 2013
- Article first published online: 1 NOV 2012
- Manuscript Accepted: 10 SEP 2012
- Manuscript Revised: 9 SEP 2012
- Manuscript Received: 7 AUG 2012
- granular activated carbon;
- biomass concentration
Information on the effects of initial biomass concentration on bioregeneration rate and efficiency is lacking as many of the bioregeneration studies were conducted at constant initial biomass concentration. The objectives of this study are: (i) to develop kinetic models incorporating adsorption, desorption, biodegradation and the irreversibility of adsorption in describing the bioregeneration of granular activated carbon (GAC) loaded with 4-chlorophenol (4-CP); and (ii) to investigate the effect of initial biomass concentration on the rate and efficiency of bioregeneration of 4-CP-loaded GAC in simultaneous adsorption and biodegradation processes.
The bioregeneration model with Haldane biodegradation kinetics gave a better fit (R2 > 0.956) than the model with first-order biodegradation kinetics (R2 > 0.805) to the experimental data. Values of the rate constant of desorption generated from the models showed that there was no observed effect of varying biomass concentration on the bioregeneration rate. The efficiency study revealed no observed effect of varying biomass concentration on the bioregeneration efficiency provided there was no inhibition effect due to 4-CP.
Change in the initial biomass concentration had no observed effect on the bioregeneration rate and efficiency, if there was no inhibitory effect due to the substrate in the latter case. © 2012 Society of Chemical Industry.