Anaerobic biodegradation of 2,4,6-trichlorophenol in expanded granular sludge bed and fluidized bed biofilm reactors bioaugmented with Desulfitobacterium spp.

Puyol, D., Rajhi, H., Mohedano, A. F., Rodriguez, J. J. and Sanz, J. L. (2011) Anaerobic biodegradation of 2,4,6-trichlorophenol in expanded granular sludge bed and fluidized bed biofilm reactors bioaugmented with Desulfitobacterium spp.. Water Science and Technology, 64 1: 293-299. doi:10.2166/wst.2011.556


Author Puyol, D.
Rajhi, H.
Mohedano, A. F.
Rodriguez, J. J.
Sanz, J. L.
Title Anaerobic biodegradation of 2,4,6-trichlorophenol in expanded granular sludge bed and fluidized bed biofilm reactors bioaugmented with Desulfitobacterium spp.
Journal name Water Science and Technology   Check publisher's open access policy
ISSN 0273-1223
1996-9732
Publication date 2011
Year available 2011
Sub-type Article (original research)
DOI 10.2166/wst.2011.556
Open Access Status
Volume 64
Issue 1
Start page 293
End page 299
Total pages 7
Place of publication London, United Kingdom
Publisher I W A Publishing
Collection year 2011
Language eng
Subject 2305 Environmental Engineering
2312 Water Science and Technology
Abstract The biodegradation of 2,4,6-trichlorophenol (246TCP) was studied using expanded granular sludge bed (EGSB) reactors and a fluidized bed biofilm reactor (FBBR) filled with activated carbon. One of the EGSB reactor and the FBBR were bioaugmented with Desulfitobacterium strains. 246TCP loading rate was gradually incremented from 10 to 250 mg L -1 day -1. The main pathway of dechlorination was in ortho-position, generating 4-chlorophenol and 2,4-dichlorophenol. The maintenance of both COD degradation efficiency (higher than 80%) and methanogenic efficiency (between 0.3 and 0.6 g CH 4-COD g -1 COD consumed) in EGSB reactor implies a great stability of the process. Through isotherm studies in FBBR, it could be deduced that around 52% of 246TCP was completely dechlorinated, whereas the adsorption involved around 16%. By means of FISH studies it was proved that the methanogenic Archaea community was maintained in the bioaugmented EGSB reactor, whereas in the FBBR this community was gradually developed until reaching stability. Desulfitobacterium community was also maintained in the reactors, although D. chlororespirans proportion rise in the FBBR at the higher 246TCP loading rates, implying that this species can withstand the 246TCP toxicity better than D. hafniense.
Keyword Trichlorophenol
Bioaugmentation
Desulfitobacterium
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Advanced Water Management Centre Publications
 
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