Biodegradation of airborne acetone/styrene mixtures in a bubble column reactor

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22320%2F17%3A43913186" target="_blank" >RIV/60461373:22320/17:43913186 - isvavai.cz</a>

Alternative codes found

RIV/60461373:22330/17:43913186

Result on the web

<a href="http://www.tandfonline.com/doi/full/10.1080/10934529.2017.1318629" target="_blank" >http://www.tandfonline.com/doi/full/10.1080/10934529.2017.1318629</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1080/10934529.2017.1318629" target="_blank" >10.1080/10934529.2017.1318629</a>

Result language

angličtina

Original language name

Biodegradation of airborne acetone/styrene mixtures in a bubble column reactor

Original language description

The ability of a bubble column reactor (BCR) to biodegrade a mixture of styrene and acetone vapors was evaluated to determine the limiting factors affecting the process efficiency, with a particular emphasis on the presence of degradation intermediates and oxygen levels. The results under varied substrate loadings and ratios were matched with the dissolved oxygen levels and kinetics of oxygen mass transfer, which was assessed by determination of kLa coefficients. A 1.5L laboratory scale BCR was operated under a constant air flow of 1.0 L.min-1, using a defined mixed microbial population as a biocatalyst. Maximum overall elimination capacities of 75.5, 66.0 and 45.8 gC.m-3.h-1 and maximum overall specific degradation rates of 0.197, 0.059 and 0.027 gC.gdw-1.h-1 for styrene/acetone 2:1, styrene-rich and acetone-rich mixtures, respectively, showing significant substrate interactions and microbiological processes being rate limiting. The BCR removed both acetone and styrene near-quantitatively up to a relatively high organic load of 50 g.m-3.h-1. From this point, the removal efficiencies declined under increasing loading, accompanied with a significant drop in the dissolved oxygen concentration showing a process transition to oxygen-limited conditions. However, the relatively efficient pollutant removal from air continued, due to significant oxygen mass transfer, up to a threshold loading when the accumulation of acetone and degradation intermediates in the aqueous medium became significant. These observations demonstrate that oxygen availability is the limiting factor for efficient pollutant degradation and that accumulation of intermediates may serve as an indicator of oxygen limitation. Microbial (activated sludge) analyses revealed the presence of amoebae and active nematodes that were not affected by variations in operational conditions.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20801 - Environmental biotechnology

Project

<a href="/en/project/LH13073" target="_blank" >LH13073: Mechanisms of microbial degradation of toxic pollutant mixtures by free and immobilized cells in different reactor types</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Environmental Science and Health. Part A: Toxic Hazardous Substances and Environmental Engineering

ISSN

1093-4529

e-ISSN

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Volume of the periodical

52

Issue of the periodical within the volume

9

Country of publishing house

US - UNITED STATES

Number of pages

11

Pages from-to

905-915

UT code for WoS article

000406758700011

EID of the result in the Scopus database

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