Simultaneous biodegradation of methane and styrene in biofilters packed with inorganic supports: Experimental and macrokinetic study

Khabiri, Bahman; Ferdowsi, Milad; Buelna, Gerardo; Jones, J. Peter; Heitz, Michèle

doi:10.1016/j.chemosphere.2020.126492

Cited by 15 publications

(5 citation statements)

References 49 publications

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“…An EBRT of 4.5 min was maintained and a stepwise increase of the inlet concentration was conducted. This EBRT is higher than typical but not unusual when the inlet concentration is high 28 – 30 . An adsorption test for toluene was conducted with sterilized filter packing and indicated no adsorption.…”

Section: Methodsmentioning

confidence: 64%

Experimental and numerical study of steady state stability in a toluene biodegrading biofilter

Süß

Visscher

2022

Sci Rep

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Different steady states in a toluene biodegrading biofilter were explored experimentally and numerically. Experimental results showed that a gradual increase of the toluene inlet concentration over several weeks leads to a consistently low exit concentration, with a drastic increase at an inlet concentration change from 7.7 to 8.5 g m−3, indicating an alteration in steady state. A significant and sudden drop in the removal efficiency from 88 to 46% was observed. A model that includes nitrogen and biomass dynamics predicted results matching the experimental biofilter performance well, but the timing of the concentration jump was not reproduced exactly. A model that assumes a gradual increase of toluene inlet concentration of 0.272 g m−3 per day, accurately reproduced the experimental relationship between inlet and outlet concentration. Although there was variation between experimental and simulated results, a clear confirmation of the jump from one steady state to another was found.

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Section: Methodsmentioning

confidence: 64%

Experimental and numerical study of steady state stability in a toluene biodegrading biofilter

Süß

Visscher

2022

Sci Rep

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“…A linear relation between PCO 2 and EC variation was obtained with slopes of 1.02 and 0.94 for BF1 and BF2, respectively. The slopes show the PCO 2 /EC ratios (mass ratio), and the deviation from the theoretical mass ratios (lower than 2.75-3.32) indicates that microorganisms produced biomass and other by-products such as extracellular polymeric substances (EPS), catechol, formaldehyde, etc., along with CO 2 (Cruz--García et al, 2019;Khabiri et al, 2020b;Shahi et al, 2016). Since the slope for BF1 was 7% higher than for BF2, a higher portion of the consumed carbon was converted to CO 2 compared to biomass.…”

Section: Total Carbon Dioxide Production As a Function Of Total Elimi...mentioning

confidence: 97%

“…Even though several studies of VOC elimination by biofiltration were reported in the literature, only a few of them treated CH 4 and VOCs simultaneously. Khabiri et al (2020b) used an inorganic BF to treat a mixture of CH 4 (IL of 6-70 g.m − 3 .h − 1 ) and styrene (IL of 9-32 g.m − 3 . h − 1 ) at an air flow rate of 0.018 m 3. h − 1 .…”

Section: Biofilters Experimental Set-upmentioning

confidence: 99%

“…The mass ratio PCO 2 /EC in case of theoretical oxidation (no oxidation by-products or biomass production) is 2.75 for CH 4 and 3.32 for EB or X as single pollutants. The theoretical PCO 2 /EC mass ratio in a BF treating CH 4 and VOC (EB or X) simultaneously, would therefore range between 2.75 and 3.32 depending on CH 4 and VOC concentrations in the mixture (Khabiri et al, 2020b).…”

Section: Total Carbon Dioxide Production As a Function Of Total Elimi...mentioning

confidence: 99%

“…In antagonistic interactions, the biodegradation of CH 4 is altered by the presence of VOCs that has a toxic or inhibitory effect. For example, styrene (Khabiri et al, 2020b), toluene and chlorobenzene (Ménard et al, 2012) were found to have an antagonistic effect on CH 4 biodegradation. On the contrary, by considering a mixture of CH 4 and VOCs, the enhancement of CH 4 biodegradation can be explained by co-metabolism phenomena, growth-benefit effect or solubility improvement of the substrate by the presence of a hydrophilic compound (Lamprea Pineda et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

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