Degradation of isobutanal at high loading rates in a compost biofilter

Sercu, Bram, Demeestere, Kristof, Baillieul, Hans, Van Langenhove, Herman and Verstraete, Willy (2005) Degradation of isobutanal at high loading rates in a compost biofilter. Journal of the Air and Waste Management Association, 55 8: 1217-1227.

Author Sercu, Bram
Demeestere, Kristof
Baillieul, Hans
Van Langenhove, Herman
Verstraete, Willy
Title Degradation of isobutanal at high loading rates in a compost biofilter
Journal name Journal of the Air and Waste Management Association   Check publisher's open access policy
ISSN 1047-3289
2162-2906
Publication date 2005-08
Sub-type Article (original research)
Volume 55
Issue 8
Start page 1217
End page 1227
Total pages 11
Place of publication Pittsburgh, United States
Publisher Air and Waste Management Association
Language eng
Subject 090703 Environmental Technologies
Abstract Biofiltration has been increasingly used for cleaning waste gases, mostly containing low concentrations of odorous compounds. To expand the application area of this technology, the biofiltration of higher pollutant loading rates has to be investigated. This article focuses on the biodegradation of isobutanal (IBAL) in a compost biofilter (BF) at mass loading rates between 211 and 4123 g/m3/day (30- 590 ppmv). At mass loading rates up to 785 g/m3/day, near 100% removal efficiencies could be obtained. However, after increasing the loading rate to 1500-1900 g/m3/ day, the degradation efficiency decreased to 62-98%. In addition, a pH decrease and production of isobutanol (IBOL) and isobutyric acid (IBAC) were observed. This is the first report showing that an aldehyde can act as electron donor as well as acceptor in a BF. To study the effects of pH, compost moisture content, and electron acceptor availability on the biofiltration of IBAL, IBOL, and IBAC, additional batch and continuous experiments were performed. A pH of 5.2 reduced the IBAL degradation rate and inhibited the IBOL degradation, although adaptation of the microorganisms to low pH was observed in the BFs. IBAC was not degraded in the batch experiments. High moisture content (51%) initially had no effect on the IBOL production, although it negatively affected the IBAL elimination increasingly during a 21-day time-course experiment. In batch experiments, the reduction of IBAL to IBOL did not decrease when the amount of available electron acceptors (oxygen or nitrate) was increased. The IBAL removal efficiency at higher loading rates was limited by a combination of nutrient limitation, pH decrease, and dehydration, and the importance of each limiting factor depended on the influent concentration.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
Advanced Water Management Centre Publications
 
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