Nitrogen utilization and biomass yield in trickle bed air biofilters

Kim, Daekeun; Sorial, George A.

doi:10.1016/j.jhazmat.2010.06.040

Cited by 13 publications

(4 citation statements)

References 19 publications

(31 reference statements)

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“…However, since the biofilter was operated in a biotrickling mode with pH control and nutrient supplementation, it is feasible that higher biomass growth yields were achieved in comparison to Grove et al [16] who examined yields in a conventional biofilter (i.e., without liquid flow). In comparison, Kim and Sorial [27] measured biomass yields in biotrickling filters of 0.64 and 0.94 g biomass/g substrate for MEK and MIBK, respectively, which compares well with this work (0.67 g biomass/g butanol).…”

Section: Co 2 Productionsupporting

confidence: 85%

“…In a biological air treatment process most VOCs are aerobically degraded to water, carbon dioxide, and biomass with an approximate formula of C5H7NO2 [27]. Hence, another method employed for monitoring biotrickling filter performance and acquiring information on the extent of mineralization is based on the measurement of CO2 concentrations in the inlet and outlet air streams.…”

Section: Co2 Productionmentioning

confidence: 99%

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Biotrickling Filtration of Air Contaminated with 1-Butanol

Schmidt

Anderson

2017

Environments

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Abstract:The removal of high concentrations of 1-butanol in an air stream was evaluated with a biotrickling filter for potential application to an industrial off-gas. Experiments were conducted on a laboratory-scale system, packed with perlite, in a co-current downward mode with constant recycling of water. The performance was monitored for different inlet concentrations and empty bed residence times during a period of over 60 days of stable operation. A maximum elimination capacity (EC) of 100 g m −3 h −1 was achieved during periods in which the butanol concentration varied from 0.55 to 4.65 g m −3 . The removal efficiency was stable and exceeded 80% for butanol concentrations in the range of 0.4 to 1.2 g m −3 , corresponding to inlet mass loadings of up to approximately 100 g m −3 h −1 . However, when the concentration exceeded 4 g m −3 , removal efficiency rapidly dropped to 15% (EC of 22 g m −3 h −1 ), indicating an inhibition effect that was reversed by decreasing the inlet concentration. This biotrickling filter was able to deal with higher sustained butanol concentrations than have been previously reported, but might not be suitable for concentrations much in excess of 1.2 g m −3 or mass inlet loads in excess of 100 g m −3 h −1 .

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Section: Co 2 Productionsupporting

confidence: 85%

Section: Co2 Productionmentioning

confidence: 99%

Biotrickling Filtration of Air Contaminated with 1-Butanol

Schmidt

Anderson

2017

Environments

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“…Nitrogen, among all the nutrients, makes up the largest fraction of dry cell mass which is about 12% for a typical bacterial cell formula of C 5 H 7 O 2 N. It is the key to sustain and promote biomass growth and VOC degradation capacity. 20 In the gas phase bioreactors, when using inorganic materials, essential nutrients such as nitrogen can not usually present in the lter bed and must be supplied by an exterior source. In general, a nutrient solution, including the carbon and nitrogen source, inorganic salts, growth factors and so on, is sprayed upon the packing materials by the nozzle and then absorbed by microorganisms.…”

Section: Resultsmentioning

confidence: 99%

Performance and biofilm characteristics of a gas biofilter for n-hexane removal at various operational conditions

Chen

Yang

et al. 2015

RSC Adv.

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The effects of operational parameters including nitrate concentration, n-hexane inlet concentration and gas empty bed residence time (EBRT) on long-term removal performance of n-hexane were discussed.Biofilm characteristics over long-term operation in a gas biotrickling filter (BTF) were also investigated. The results showed that 160 mg L À1 of N-NO 3 À was sufficient for n-hexane removal at a constant inlet concentration of 350 mg m À3 and gas EBRT of 30 s. With increasing inlet concentration and decreasing EBRT, the removal efficiency (RE) declined. The elimination capacity (EC) maximized at 45.36 g m À3 h À1for an inlet concentration of 900 mg m À3 and gas EBRT of 30 s. Proteins were the dominant component of EPS in biofilms for n-hexane removal in a gas biofilter. Protein concentration in the biofilms increased while the polysaccharide concentration changed slightly, therefore the total extracellular polymeric substance (EPS) concentration increased over time. The zeta potential of the biofilms became less negative due to an increase in protein concentration, indicating that the zeta potential could be used as an index of protein concentration in gas biofilters.

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“…However, the use of NO3 − instead of NH4 + for microbial growth requires more energy, and thus, results in reduced cell growth rates (Jorio, Bibeau, and Heitz 2000). Further, biomass production by microorganisms using nitrogen in biofiltration has been observed (Kim and Sorial 2010). To avoid clogging of the filter bed, the production of excess biomass need to be controlled by optimizing the supply of nitrogen (Delhomenie, Bibeau, and Gendron 2003).…”

Section: Introductionmentioning

confidence: 99%

Influence of phosphorus and trace metals in biofilters treating gaseous VOCs using a novel irrigation system

Mansoori

Ando

Higuchi

2019

Journal of the Air & Waste Management Association

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Although the appropriate supply of nutrients has been extensively researched, more information is required on the effects of nutrients in treating gaseous volatile organic compounds (VOCs) in biofiltration. In this study, the effects of phosphorous and trace metals on gaseous toluene and methyl ethyl ketone (MEK) removal were investigated. The transfer of nutrients from the irrigation liquid to the packed bed, and the consumption and holding amount of nutrients in the packing material were observed during biofiltration. Under conditions of 20-24 s of empty bed residence time, MEK removal was 95% or more in all conditions of the biofiltration reactors, whereas toluene removal was affected by the operating conditions of the reactors. Consumption ratio of phosphorus to carbon was from 1.7 × 10 −4 to 1.1 × 10 −3 in the steady state of VOC removal under the conditions of this study. When gaseous VOC treatment was restarted after nine days of shutdown, a significant decline in toluene removal was observed by the reactor in which phosphorus supply was approximately one fifth of the amount in another reactor. Two types of irrigation systems, soaking and spraying, were compared and soaking irrigation achieved a more even distribution of nutrients held inside the packed bed. Soaking irrigation was expected to lead to higher VOC removal capacity by this distribution effect of nutrients, but toluene removal in the reactor with this irrigation was lower than that in the reactor with spraying irrigation. One of the possible reasons for this was the inhibition of nutrients transfer in the bottom part of the reactor. The trend of transfer in all ingredients from the irrigation liquid to the packed bed was synchronized on the whole; however, this transfer relatively tended to be high in nitrate and sodium and low in ammonium and phosphate.Implications: A major concern about using biofiltration systems to treat VOCs is the uncertainty regarding the appropriate nutrient supply to the filter bed to preserve microbial activity. This study showed that all the elements, except nitrogen, were retained sufficiently in the filter bed when a proper composition of nutrient solution was used for irrigation; however, phosphate addition may be needed when restarting a reactor from a prolonged period of shutdown. Distinct differences in the amount of transfer to the filter bed for different ingredients are probable, and may have to be taken into account when operating biofiltration reactors.

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Nitrogen utilization and biomass yield in trickle bed air biofilters

Cited by 13 publications

References 19 publications

Biotrickling Filtration of Air Contaminated with 1-Butanol

Biotrickling Filtration of Air Contaminated with 1-Butanol

Performance and biofilm characteristics of a gas biofilter for n-hexane removal at various operational conditions

Influence of phosphorus and trace metals in biofilters treating gaseous VOCs using a novel irrigation system

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