Review: Waste gas biotreatment technology

Kennes, Christian; Thalasso, Frédéric

doi:10.1002/(sici)1097-4660(199808)72:4<303::aid-jctb903>3.0.co;2-y

Cited by 248 publications

(42 citation statements)

References 67 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Design guidelines for tricklebed systems have been summarized recently (35,55,56). Reactor plugging due to excess microbial growth in the space between the packing particles is a particular concern in these bioreactors (57,58). Also, maintaining pH control in the acid-producing fermentations is a potential concern in scaling up reactors that are not wellmixed.…”

Section: Resultsmentioning

confidence: 99%

Reactor Design Issues for Synthesis‐Gas Fermentations

Bredwell

Srivastava

Worden³

1999

Biotechnology Progress

236

168

View full text Add to dashboard Cite

Synthesis gas is readily obtained by gasifying coal, oil, biomass, or waste organics and represents an abundant, potentially inexpensive, feedstock for bioprocessing. The primary components of synthesis gas, carbon monoxide and hydrogen, can be converted into methane, organic acids, and alcohols via anaerobic fermentations. Bioconversion of synthesis gas is an attractive alternative to catalytic processing because the biological catalysts are highly specific and often more tolerant of sulfur contaminants than inorganic catalysts. However, because the aqueous solubilities of carbon monoxide and hydrogen are low, synthesis-gas fermentations are typically limited by the rate of gas-to-liquid mass transfer. Consequently, a major engineering challenge in commercial development of synthesis-gas fermentations is to provide sufficient gas mass transfer in an energy-efficient manner. This paper reviews recent progress in the development of synthesis-gas fermentations, with emphasis on efforts to increase the efficiency of gas mass transfer. Metabolic properties of several microbes able to ferment synthesis gas are described. Results of synthesis-gas fermentations conducted in various bioreactor configurations are summarized. Recent results showing enhancement of synthesis-gas fermentations using microbubble dispersions are presented, and studies of the mass-transfer and coalescence properties of microbubbles are described.

show abstract

Section: Resultsmentioning

confidence: 99%

Reactor Design Issues for Synthesis‐Gas Fermentations

Bredwell

Srivastava

Worden³

1999

Biotechnology Progress

236

168

View full text Add to dashboard Cite

show abstract

“…Several processes are available to remove them: chemical scrubbing (Chen & Lee 1999), biological treatment (Kennes & Thalasso 1998), adsorption and thermal oxidation are the most commonly used. Concerning the chemical way, scrubbing is mainly performed with an aqueous solution containing acid, base and/or oxidant.…”

Section: Introductionmentioning

confidence: 99%

Absorption and biodegradation of hydrophobic volatile organic compounds: determination of Henry's constants and biodegradation levels

Darracq

Couvert

Couriol

et al. 2009

Water Science and Technology

View full text Add to dashboard Cite

Biodegradation of three volatile organic compounds (VOCs) was studied. Toluene, dimethylsulphide (DMS), and dimethyldisulphide (DMDS) were introduced into flasks filled with emulsions of Di-2-EthylHexylAdipate (DEHA) in water, containing biomass (activated sludge). The VOC concentrations were analysed in the gas, organic and aqueous phases, and compared to the initial VOC quantities introduced in order to deduce their consumption by biomass. Toluene and DMDS were completely consumed, and then removed from the gas and the organic phases, except when DEHA and water are in the same volume ratio, which appears to be extreme environmental conditions for bacterial growth. The high DMS volatility resulted in an important gas loss, leading to a lower amount of DMS available for activated sludge growth. For all the VOC experiments, some components, characteristics of the DEHA degradation, including 2-ethylhexanal, 2-ethylhexanol, 2-ethylhexanoic acid and adipic acid, were identified.

show abstract

“…Carriers provide the microorganisms with a favourable environment in terms of pH, temperature, moisture and oxygen supply. As polluted air passes through the filter bed, pollutants are transferred from the gas phase to the biofilm developed on the filter material, and the micro-organisms metabolize the pollutants (Kennes and Thalasso 1998). Organic carriers normally provide nutrients (Devinny et al 1999), but when they are lignocellulosic, nutrients are available only after carrier degradation.…”

Section: Introductionmentioning

confidence: 99%

Microbial characterization of organic carrier colonization during a model biofiltration experiment

Pineda¹,

Alba²,

Thalasso³

et al. 2004

Lett Appl Microbiol

View full text Add to dashboard Cite

Aims:2 Dynamic microbial characterization of the colonization of organic carrier during a model biofiltration experiment using methanol as air pollutant. Methods and Results: A model biofilter was used in order to characterize the micro-organisms involved in the colonization of a model organic carrier. The model system consisted of closed vial as biofilter, peanut shells as lignocellulosic carrier and methanol as air pollutant. The micro-organisms involved in biofiltration were identified and characterized for their lignocellulolytic and methylotrophic activities. Fungi presented a higher lignocellulolytic activity than bacteria. A steady-state was reached after 15 to 20 days. Conclusions: The consortium naturally associated to peanut shells is limited to few aerobic bacteria and lignocellulolytic fungi. This consortium was able to degrade methanol without external nutrient supply. Significance and Impact of the Study: To our knowledge, this is the first paper that focuses on carrier degradation processes and the micro-organisms involved during the start-up period of a biofiltration process.

show abstract

Review: Waste gas biotreatment technology

Cited by 248 publications

References 67 publications

Reactor Design Issues for Synthesis‐Gas Fermentations

Reactor Design Issues for Synthesis‐Gas Fermentations

Absorption and biodegradation of hydrophobic volatile organic compounds: determination of Henry's constants and biodegradation levels

Microbial characterization of organic carrier colonization during a model biofiltration experiment

Contact Info

Product

Resources

About