Cometabolic bioregeneration of activated carbons loaded with 2-chlorophenol


AKTAŞ Ö. , Çeçen F.

BIORESOURCE TECHNOLOGY, cilt.100, ss.4604-4610, 2009 (SCI İndekslerine Giren Dergi)

  • Cilt numarası: 100 Konu: 20
  • Basım Tarihi: 2009
  • Doi Numarası: 10.1016/j.biortech.2009.04.053
  • Dergi Adı: BIORESOURCE TECHNOLOGY
  • Sayfa Sayısı: ss.4604-4610

Özet

Thermally and chemically activated carbons were used to investigate the extent of cometabolic bioregeneration in laboratory scale activated sludge reactors. Bioregeneration was determined and quantified by measuring the substrate and chloride concentrations, oxygen uptake rates, and deterioration in adsorption capacities. Activated carbons loaded with 2-chlorophenol could be partially bioregenerated in the presence of phenol as the growth substrate. The occurrence of exoenzymatic bioregeneration was also possible during cometabolic bioregeneration of thermally activated carbons. However, cometabolic bioregeneration of chemically activated carbons was much superior compared with thermally activated carbons. in cometabolic bioregeneration of activated carbons loaded with 2-chlorophenol, biodegradation, rather than desorption, was the rate-limiting step. Environmental Scanning Electron Microscopy analyses showed that groups of cocci-shaped phenol-oxidizers were attached to the outer Surface or internal cavities of activated carbon as a fingerprint of bioregeneration. (C) 2009 Elsevier Ltd. All rights reserved