Song, Z. and Edwards, S.R. and Burns, R.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 Res, 40 (3). pp. 495-506. ISSN 0043-1354.
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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: | 14 Jan 2010 14:25 |
| Resource URI: | http://kar.kent.ac.uk/id/eprint/6734 (The current URI for this page, for reference purposes) |
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