Effect of inlet mass loading, water and total bacteria count on methanol elimination using upward flow and downward flow biofilters

Krailas, Satida; Pham, Q.T.; Amal, Rose; Jiang, Jianming; Heitz, Michèle

doi:10.1002/(sici)1097-4660(200004)75:4<299::aid-jctb210>3.0.co;2-p

Cited by 47 publications

(23 citation statements)

References 18 publications

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“…3). These figures are of the same order of magnitude than those previously reported by Krailas et al (2000) in a biofilter-treating methanol. Rhizopus sp.…”

Section: Biofiltrationsupporting

confidence: 83%

Microbial characterization of organic carrier colonization during a model biofiltration experiment

Pineda¹,

Alba²,

Thalasso³

et al. 2004

Lett Appl Microbiol

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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.

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“…3). These figures are of the same order of magnitude than those previously reported by Krailas et al (2000) in a biofilter-treating methanol. Rhizopus sp.…”

Section: Biofiltrationsupporting

confidence: 83%

Microbial characterization of organic carrier colonization during a model biofiltration experiment

Pineda¹,

Alba²,

Thalasso³

et al. 2004

Lett Appl Microbiol

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“…across the filter bed), with various types of packing materials, operating conditions and microbial populations ( Table 1). [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] Nevertheless, little is known about biofiltration limits, particularly regarding steady state operation at the maximum system capacity under high concentrations of methanol. As can be seen in Table 1, most studies have focused on the treatment of inlet methanol concentrations (C in ) below 5 g m −3 , while only three experiments have reported results above 10 g m −3 .…”

Section: Introductionmentioning

confidence: 99%

Biofiltration of high concentrations of methanol vapors: removal performance, carbon balance and microbial and fly populations

Cruz‐García

Geronimo‐Meza

Martínez‐Lievana

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND Methanol vapors, broadly emitted by industry, can be cost‐effectively treated by biofiltration. However, long‐term operation under high concentrations regularly encountered in the pulp and paper industry (> 5 g m−3) has been barely studied. RESULTS Methanol concentrations between 1.6 and 14 g m−3 were treated in a biofilter. Complete methanol removal was obtained for concentrations up to 3.5 g m−3, for an empty bed retention time (EBRT) of 60 s. A higher EBRT (160 s) was necessary to eliminate all methanol for concentrations up to 7 g m−3. For higher concentrations, a maximum elimination capacity (ECmax) of 343.8 g m−3 h−1 was achieved. The main challenge encountered during the biofiltration of high methanol concentrations was excessive biomass buildup (with a performance drop due to clogging occurring every 2 weeks). Under high methanol concentrations, 11 bacteria, three fungi, and one yeast prevailed in the biofilm. Flies and fly larvae were detected when no biofilter clogging was observed, regulating biomass excess. CONCLUSIONS High methanol concentrations trigger biomass growth and clogging. Diptera represent a research opportunity to control such phenomena. © 2019 Society of Chemical Industry

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“…Studies have also focused on the structure of the fungi and the pollutant capturing mechanism in their mycelia and confirmed that it can directly absorb hydrophobic compounds (Krailas et al 2000). The reason for this is that there is no water layer between fungi biofilm and gas phase; therefore, hydrophobic compounds are removed faster comparing with bacterial biofilm (Fulazzaky et al 2014;Pedersen et al 1997).…”

Section: Toluene Removal Efficiency In Both Bfsmentioning

confidence: 99%

A comparison of biofiltration performance based on bacteria and fungi for treating toluene vapors from airflow

et al. 2020

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With increasing concerns about industrial gas contaminants and the growing demand for durable and sustainable technologies, attentions have been gradually shifted to biological air pollution controls. The ability of Pseudomonas putida PTCC 1694 (bacteria) and Pleurotus ostreatus IRAN 1781C (fungus) to treat contaminated gas stream with toluene and its biological degradation was compared under similar operating conditions. For this purpose, a biofilter on the laboratory scale was designed and constructed and the tests were carried out in two stages. The first stage, bacterial testing, lasted 20 days and the second stage, fungal testing, lasted 16 days. Inlet loading rates (IL) for bacterial and fungal biofilters were 21.62 ± 6.04 and 26.24 ± 7.35 g/m 3 h respectively. In general, fungal biofilter showed a higher elimination capacity (EC) than bacterial biofilter (18.1 ± 6.98 vs 13.7 ± 4.7 g/m 3 h). However, the pressure drop in the fungal biofilter was higher than the bacterial biofilter (1.26 ± 0.3 vs 1 ± 0.3 mm water), which was probably due to the growth of the mycelium. Fungal biofiltration showed a better performance in the removal of toluene from the air stream.

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Effect of inlet mass loading, water and total bacteria count on methanol elimination using upward flow and downward flow biofilters

Cited by 47 publications

References 18 publications

Microbial characterization of organic carrier colonization during a model biofiltration experiment

Microbial characterization of organic carrier colonization during a model biofiltration experiment

Biofiltration of high concentrations of methanol vapors: removal performance, carbon balance and microbial and fly populations

A comparison of biofiltration performance based on bacteria and fungi for treating toluene vapors from airflow

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