Treatment of phenol in an anaerobic fluidized bed reactor (AFBR): continuous and batch regime

Biodegradation
Jose B CarbajoPedro Leton

Abstract

Results of this study describe the feasibility of anaerobic treatment of highly concentrated phenol synthetic wastewater using an anaerobic fluidized bed reactor (AFBR) in both continuous and batch modes. Wastewater with a maximum load of 2,100 mg C.l(-1) was prepared using phenol (maximum concentration of 1,600 mg C.l(-1)) as substrate and a mixture of acetic, propionic and butyric acids (500 mg C.l(-1)) as co-substrate. AFBR reached total organic carbon (TOC) and phenol removal efficiency over 95% treating the highest organic loading rate (OLR) containing phenol studied for this kind of reactor (5.03 g C.l(-1).d(-1)). The phenol loading rate rise caused volumetric biogas rate increase up to 4.4 l.l(-1).d(-1) (average yield of 0.28 l CH(4).g(-1) COD(removed)) as well as variation in the biogas composition; the CO(2) percentage increased while the CH(4) percentage decreased. Morphological examination of the bioparticles at 4.10 g C.l(-1).d(-1), revealed significant differences in the biofilm structure, microbial colonization and bacterial morphological type development. The five batch assays showed that phenol degradation may be favoured by the presence of volatile fatty acids (VFAs) (co-metabolism), whereas VFAs degradation ma...Continue Reading

References

Sep 18, 1999·Canadian Journal of Microbiology·K Tawfiki HajjiR Beaudet
Aug 13, 2002·Water Research·M D Hidalgo, P A García-Encina
May 10, 2005·Water Research·Gavin CollinsVincent O'Flaherty

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Citations

Apr 9, 2011·Applied Microbiology and Biotechnology·Andrew J DaugulisBenoit Guieysse
Jun 4, 2020·Applied Microbiology and Biotechnology·Domenica Mosca AngelucciM Concetta Tomei
Feb 7, 2013·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Sylvia P F OmenaEdson L Silva
Feb 26, 2021·Applied Microbiology and Biotechnology·M Concetta TomeiLorenzo Brusetti

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