Treatment of naphthalene-2-sulfonic acid from tannery wastewater by a granular activated carbon fixed bed inoculated with bacterial isolates Arthrobacter globiformis and Comamonas testosteroni

Song, Zhi and Edwards, Suzanne R. and Burns, Richard G. (2006) Treatment of naphthalene-2-sulfonic acid from tannery wastewater by a granular activated carbon fixed bed inoculated with bacterial isolates Arthrobacter globiformis and Comamonas testosteroni. Water Research, 40 (3). pp. 495-506. ISSN 0043-1354. (The full text of this publication is not available from this repository)

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Official URL
http://dx.doi.org/10.1016/j.watres.2005.11.035

Abstract

The kinetics of naphthalene-2-sulfonic acid (2-NSA) adsorption by granular activated carbon (GAC) were measured and the relationships between adsorption, desorption, bioavailability and biodegradation assessed. The conventional Langmuir model fitted the experimental sorption isotherm data and introduced 2-NSA degrading bacteria, established on the surface of the GAC, did not interfere with adsorption. The potential value of GAC as a microbial support in the aerobic degradation of 2-NSA by Arthrobacter globiformis and Comamonas testosteroni was investigated. Using both virgin and microbially colonised GAC, adsorption removed 2-NSA from the liquid phase up to its saturation capacity of 140 mg/g GAC within 48 h. However, between 83.2% and 93.3% of the adsorbed 2-NSA was bioavailable to both bacterial species as a source of carbon for growth. In comparison to the non-inoculated GAC, the combination of rapid adsorption and biodegradation increased the amount (by 70-93%) of 2-NSA removal from the influent phase as well as the bed-life of the GAC (from 40 to >120 d). A microbially conditioned GAC fixed-bed reactor containing 15 g GAC removed 100% 2-NSA (100 mg/l) from tannery wastewater at an empty bed contact time of 22 min for a minimum of 120 d without the need for GAC reconditioning or replacement. This suggests that small volume GAC bioreactors could be used for tannery wastewater recycling.

Item Type: Article
Additional information: 0043-1354 (Print) Journal Article Research Support, Non-U.S. Gov't
Uncontrolled keywords: Adsorption Arthrobacter/*metabolism Biodegradation, Environmental Biological Availability Bioreactors Carbon/chemistry Comamonas/*metabolism Kinetics Naphthalenesulfonates/*metabolism Tanning Waste Disposal, Fluid/*methods
Subjects: Q Science
Divisions: Faculties > Science Technology and Medical Studies > School of Biosciences
Depositing User: Sue Davies
Date Deposited: 03 Sep 2008 14:27
Last Modified: 13 May 2014 13:15
Resource URI: http://kar.kent.ac.uk/id/eprint/6734 (The current URI for this page, for reference purposes)
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