Microbial succession in a compost-packed biofilter treating benzene-contaminated air

Biodegradation
Sara BorinDaniele Daffonchio

Abstract

Air artificially contaminated with increasing concentrations of benzene was treated in a laboratory scale compost-packed biofilter for 240 days with a removal efficiency of 81-100%. The bacterial community in the packing material (PM) at different heights of the biofilter was analysed every 60 days. Bacterial plate counts and ribosomal intergenic spacer analysis (RISA) of the isolated strains showed that the number of cultivable aerobic heterotrophic bacteria and the species diversity increased with benzene availability. Identification of the isolated species and the main bands in denaturing gradient gel electrophoresis (DGGE) profiles from total compost DNA during the treatment revealed that, at a relatively low volumetric benzene load (1.2< or =VBL< or =6.4 g m(-3) (PM) h(-1)), besides low G+C Gram positive bacteria, originally present in the packing compost, bacteroidetes and beta- and gamma-proteobacteria became detectable in the colonising population. At the VBL value (24.8 g m(-3) (PM) h(-1)) ensuring the maximum elimination capacity of the biofilter (20.1 g m(-3) (PM) h(-1)), strains affiliated to the genus Rhodococcus dominated the microflora, followed by beta-proteobacteria comprising the genera Bordetella and Neisseri...Continue Reading

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Citations

Oct 11, 2007·Applied Microbiology and Biotechnology·Jason A GroveMurray Moo-Young
Mar 23, 2011·Applied Microbiology and Biotechnology·Léa Cabrol, Luc Malhautier
Sep 17, 2010·Journal of the Air & Waste Management Association·Ana ElíasGabriel Ibarra-Berastegi
Apr 26, 2011·Systematic and Applied Microbiology·Anja KristiansenAndreas Schramm
Nov 10, 2009·Bioresource Technology·Hee Wook RyuDong Jin Chung
Aug 12, 2009·Bioresource Technology·Callie W BabbittAngela S Lindner
Mar 12, 2008·Environmental Microbiology·Massimo MarzoratiWilly Verstraete
Mar 31, 2015·Microbiology·Guangyu LiuRachel M Exley
May 29, 2015·Biotechnology, Biotechnological Equipment·Pranas BaltrėnasAntonas Misevičius
Oct 28, 2011·FEMS Microbiology Ecology·Léa CabrolJean-Louis Fanlo
Jun 22, 2014·Applied Microbiology and Biotechnology·Kevin J PortuneCarmen Gabaldón

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