Enhanced biodegradation of phenolic wastewaters with acclimatized activated sludge - A kinetic study
authors Kamali, M; Gameiro, T; Costa, ME; Capela, I; Aminabhavi, TM
nationality International
journal CHEMICAL ENGINEERING JOURNAL
author keywords Phenolic wastewater; Activated sludge; Sequencing batch reactor; Degradation kinetics
keywords INDUSTRIAL WASTE-WATER; TREATMENT TECHNOLOGIES; IMMOBILIZED CELLS; AEROBIC GRANULES; ADSORPTION; TOXICITY; REMOVAL; SUSTAINABILITY; BIOREACTOR; PARAMETERS
abstract This work reports the biodegradation of phenol with enhanced efficiency in a sequencing batch reactor (SBR) after an acclimatization procedure with mixed culture activated sludge. The effects of temperature, initial phenol concentration and acclimatization procedure on phenol biodegradation were investigated. Acclimatization greatly favoured biodegradation rate of the phenol, while temperature showed no significant effect. After 60 days of acclimatization, the Haldane kinetic inhibition model indicated that activated sludge could degrade phenol at the maximum rate of 0.117 (g phenol/g VSS/h) at pH similar to 6 and phenol concentration of 400 mg/L at room temperature (T = 15-18 degrees C). Kinetic parameters including maximum phenol degradation rate (q(max)) of 0.521 (g phenol/g VSS/h), half-saturation constant (K-S) of 692 mg/L and an inhibition constant K-I of 231 mg/L were computed. The results of this study represent the highest phenol biodegradation efficiency in terms of the parameters such as time and phenol concentration, suggesting that acclimatized activated sludge exhibited a high resistant ability to phenol. In addition, inhibitory effects were identified at phenol concentrations higher than 400 mg/L. The system also showed high degree of stability and resistance to a load shock by increasing the initial concentration of phenol from 500 to 1000 mg/L.
publisher ELSEVIER SCIENCE SA
issn 1385-8947
isbn 1873-3212
year published 2019
volume 378
digital object identifier (doi) 10.1016/j.cej.2019.122186
web of science category Engineering, Environmental; Engineering, Chemical
subject category Engineering
unique article identifier WOS:000487764800114
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journal analysis (jcr 2019):
journal impact factor 10.652
5 year journal impact factor 9.43
category normalized journal impact factor percentile 97.361
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