Release of formaldehyde during the biofiltration of methanol vapors in a peat biofilter inoculated with Pichia pastoris GS115

Guerrero, Karlo; Arancibia, Alejandra; Cáceres, Manuel; Aroca, Germán

doi:10.1016/j.ejbt.2019.04.003

Cited by 6 publications

(2 citation statements)

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“…Untreated intermediates usually can be found as output Cs in outlet gas stream or leachate of the biofilters if the pollutant inlet load is high (IL > 150 g m −3 h −1 ) . For example, formaldehyde emissions were detected in a methanol biofilter for methanol ILs exceeding 250 g m −3 h −1 . Therefore, in the current study, the presence of intermediates in gas or liquid end products was neglected.…”

Section: Resultsmentioning

confidence: 98%

“…Methanol, formaldehyde and formic acid are the intermediates for CH 4 biodegradation ; methanol bioconversion is based on formaldehyde and formic acid production, 2 and intermediate compounds such as acetaldehyde, acetic acid and ethyl acetate contribute to ethanol bioxidation . Untreated intermediates usually can be found as output Cs in outlet gas stream or leachate of the biofilters if the pollutant inlet load is high (IL > 150 g m −3 h −1 ) . For example, formaldehyde emissions were detected in a methanol biofilter for methanol ILs exceeding 250 g m −3 h −1 .…”

Section: Resultsmentioning

confidence: 99%

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Moving from alcohol to methane biofilters: an experimental study on biofilter performance and carbon distribution

Ferdowsi

Desrochers

Jones

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND Biofilters can be used to eliminate different gaseous pollutants including alcohols (e.g. methanol, ethanol) and methane (CH4) individually or in a mixture. In this regard, the biofilter adaptability to feed composition variation is an industrial requisite. Inlet gas composition changes also give a better insight about carbon input and end‐points in biofilters. In this study, the gradual conversions of two biofilters from methanol and ethanol to CH4 were investigated. RESULTS Both biofilters reached 100% removal efficiencies for the alcohols with no initial inoculation. Keeping the total inlet load constant (30 ± 1.3 g m−3 h−1), CH4 was progressively substituted in the feed with corresponding alcohol:CH4 mass ratios of 3:1, 1:1, 1:3 and 0 galcohol:gCH4. Maximum CH4 removal efficiencies of 52% and 29% were obtained (respectively) for biofilters started with methanol and ethanol. By moving from alcohols to CH4 biofilters, the gas phase output carbon increased from 273 to 666 gcarbon day−1 and from 377 to 681 gcarbon day−1 respectively for the methanol‐ and ethanol‐based biofilters. CONCLUSION This study showed a successful treatment based on inlet pollutant alteration from methanol or ethanol to CH4 in two separate biofilters. However, the methanol‐based biofilter displayed a better performance and a shorter acclimation time for CH4 conversion. © 2019 Society of Chemical Industry

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Section: Resultsmentioning

confidence: 98%