Biofiltration of Gaseous Toluene Using Adsorbent Containing Polyurethane Foam Media

Amarsanaa, Altangerel; Shin, Won Sik; Choi, Jeong Hak; Choi, Sang June

doi:10.4491/eer.2006.11.1.001

Cited by 8 publications

(5 citation statements)

References 22 publications

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“…These include soil, wood chips, bark, sawdust, activated carbon, ceramic, ground tires, polystyrene beads and polyurethane foam. 2,[4][5][6][7][8][9][10][11] In addition to the primary support medium, a variety of additives may be used including bulking agents, buffers, nutrients, and microorganisms.…”

Section: )mentioning

confidence: 99%

“…21,38) However, the adsorptive effect of the carrier was lower than those of other conventional carriers. 9,10) After the 5 th day, the adsorption capacity of the biofilter column was under thermodynamic equilibrium with the pollutant gases. Since the micro- organisms were not fully acclimated yet, biodegradation was not active and thus the removal efficiencies of all gases decreased until the 20 th day.…”

Section: Microbiological Analysismentioning

confidence: 99%

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Simultaneous Biofiltration of H₂S, NH₃and Toluene using an Inorganic/Polymeric Composite Carrier

Park¹,

Shin²,

Chung

2008

Environmental Engineering Research

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Simultaneous removal of ternary gases of NH3, H2S and toluene in a contaminated air stream was investigated over 180 days in a biofilter. A commercially available inorganic/polymeric composite chip with a large void volume (bed porosity > 0.80) was used as a microbial support. Multiple microorganisms including Nitrosomonas and Nitrobactor for nitrogen removal, Thiobacillus thioparus (ATCC 23645) for H2S removal and Pseudomonas aeruginosa (ATCC 15692), Pseudomonas putida (ATCC 17484) and Pseudomonas putida (ATCC 23973) for toluene removal were used simultaneously. The empty bed residence time (EBRT) ranged from 60-120 seconds and the inlet feed concentration was 0.0325 g/m 3-0.0651 g/m 3 for NH3, 0.0636 g/m 3-0.141 g/m 3 for H2S, and 0.0918 g/m 3-0.383 g/m 3 for toluene, respectively. The observed removal efficiency was 2%-98% for NH3, 2%-100% for H2S, and 2%-80% for toluene, respectively. Maximum elimination capacity was about 2.7 g/m 3 /hr for NH3, > 6.4 g/m 3 /hr for H2S and 4.0 g/m 3 /hr for toluene, respectively. The inorganic/polymeric composite carrier required 40-80 days of wetting time for biofilm formation due to the hydrophobic nature of the carrier. Once the surface of the carrier was completely wetted, the microbial activity became stable. During the long-term operation, pressure drop was negligible because the void volume of the carrier was two times higher than the conventional packing materials.

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Section: )mentioning

confidence: 99%

Section: Microbiological Analysismentioning

confidence: 99%

Simultaneous Biofiltration of H₂S, NH₃and Toluene using an Inorganic/Polymeric Composite Carrier

Park¹,

Shin²,

Chung

2008

Environmental Engineering Research

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“…N is the mole number of absorbed ammonia gas and kL is the mass transfer coefficient. The following equation can be derived as follows 4) * L A vap t=o dV ART = k c dt P -P (2) where P is the atmospheric pressure, P vap is the vapor pressure. R is the universe gas constant, t is time and T is the temperature in Kelvin.…”

Section: Effect Of Concentrationmentioning

confidence: 99%

“…Traditional methods to control the emissions of gaseous odorcausing materials into the atmosphere include absorption of wet scrubbing, adsorption, thermal incineration, masking and biofiltration. [1][2][3][4] Nevertheless, all these technologies may have limitations in removing odor-causing substances from gas streams. Absorption and adsorption transfer odor-causing materials from the gas phase to scrubbing liquids or solid adsorbents, potentially causing other forms of pollution while resolving odor problems.…”

Section: Introductionmentioning

confidence: 99%

Aqeous Neutralizer as Reactive Solvents for Odorous Ammonia Removal

Park

2008

Environmental Engineering Research

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Ammonia is an inorganic compound that may cause severe odor problem. In this study the effectiveness of applying natural neutralizer to destroy and remove the odor-causing compound from gas streams was studied. Experimental result evaluated with a bench-scale apparatus via the neutralization of gas phase. This indicates that the natural neutralization depends on the gas concentration, gas residence time, temperature and pH. Removal efficiency of ammonia from gas stream was achieved by 95% using the convection in the packed bed. This study proved the chemical neutralization technology was effective for controlling inorganic odor-causing compound.

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“…While packing media used in conventional biofilter beds consist mostly of peat or compost, a wide variety of other materials have been used. These include soil, wood chips, bark, sawdust, activated carbon, ceramic, ground tires, polystyrene beads and polyurethane foam [2,[4][5][6][7][8][9][10][11]. In addition to the primary support medium, a variety of additives may be used including bulking agents, buffers, nutrients, and microorganisms [12].…”

Section: Introductionmentioning

confidence: 99%

Simultaneous biofiltration of H2S, NH3 and toluene using cork as a packing material

Park

Shin

Chung

2009

Korean J. Chem. Eng.

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Simultaneous removal of ternary gases of NH 3 , H 2 S and toluene in a contaminated air stream was investigated over 185 days in a biofilter packed with cork as microbial support. Multi-microorganisms including Nitrosomonas and Nitrobactor for nitrogen removal, Thiobacillus thioparus (ATCC 23645) for H 2 S removal and Pseudomonas aeruginosa (ATCC 15692), Pseudomonas putida (ATCC 17484) and Pseudomonas putida (ATCC 23973) for toluene removal were used simultaneously. The empty bed residence time (EBRT) was 40-120 seconds and the inlet feed concentration was 50-180 ppmv for NH 3 , 30-160 ppmv for H 2 S and 40-130 ppmv for toluene, respectively. The observed removal efficiency was 45-100% for NH 3 , 96-100% for H 2 S, and 10-99% for toluene, respectively. Maximum elimination capacity was 5.5 g/m 3 /hr for NH 3 , >20.4 g/m 3 /hr for H 2 S and 4.5 g/m 3 /hr for toluene, respectively. During longterm operation, the removal efficiency of toluene gradually decreased, mainly due to depositions of elemental sulfur and ammonium sulfate on the cork surface. The results of microbial analysis showed that nearly the same population density was observed on the surfaces of cork chips collected at each sampling point. Kinetic model analyses showed that there were no particular evidences of interactions or inhibitions among the microorganisms.

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Biofiltration of Gaseous Toluene Using Adsorbent Containing Polyurethane Foam Media

Cited by 8 publications

References 22 publications

Simultaneous Biofiltration of H₂S, NH₃and Toluene using an Inorganic/Polymeric Composite Carrier

Simultaneous Biofiltration of H₂S, NH₃and Toluene using an Inorganic/Polymeric Composite Carrier

Aqeous Neutralizer as Reactive Solvents for Odorous Ammonia Removal

Simultaneous biofiltration of H2S, NH3 and toluene using cork as a packing material

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Biofiltration of Gaseous Toluene Using Adsorbent Containing Polyurethane Foam Media

Cited by 8 publications

References 22 publications

Simultaneous Biofiltration of H2S, NH3and Toluene using an Inorganic/Polymeric Composite Carrier

Simultaneous Biofiltration of H2S, NH3and Toluene using an Inorganic/Polymeric Composite Carrier

Aqeous Neutralizer as Reactive Solvents for Odorous Ammonia Removal

Simultaneous biofiltration of H2S, NH3 and toluene using cork as a packing material

Contact Info

Product

Resources

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Simultaneous Biofiltration of H₂S, NH₃and Toluene using an Inorganic/Polymeric Composite Carrier

Simultaneous Biofiltration of H₂S, NH₃and Toluene using an Inorganic/Polymeric Composite Carrier