Response of microbial community structure and metabolic profile to shifts of inlet VOCs in a gas-phase biofilter.

Abstract:

:The effects of inlet VOCs (Volatile Organic Compounds) shifts on microbial community structure in a biofiltration system were investigated. A lab-scale biofilter was set up to treat eight VOCs sequentially. Short declines in removal efficiency appeared after VOCs shifts and then later recovered. The number of OTUs in the biofilter declined from 690 to 312 over time. At the phylum level, Actinobacteria and Proteobacteria remained dominant throughout the operation for all VOCs, with their combined abundance ranging from 60 to 90%. The abundances of Planctomycetes and Thermi increased significantly to 20% and 5%, respectively, with the intake of non-aromatic hydrocarbons. At the genus level, Rhodococcus was present in the highest abundance (≥ 10%) throughout the experiment, indicating its wide degradability. Some potential degraders were also found; namely, Thauera and Pseudomonas, which increased in abundance to 19% and 12% during treatment with ethyl acetate and toluene, respectively. Moreover, the microbial metabolic activity declined gradually with time, and the metabolic profile of the toluene-treating community differed significantly from those of other communities.

journal_name

AMB Express

journal_title

AMB Express

authors

Lu L,Wang G,Yeung M,Xi J,Hu HY

doi

10.1186/s13568-018-0687-z

subject

Has Abstract

pub_date

2018-10-03 00:00:00

pages

160

issue

1

issn

2191-0855

pii

10.1186/s13568-018-0687-z

journal_volume

8

pub_type

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