title: Effects of nitrogen source and empty bed residence time on the removal of styrene gaseous emissions by biotrickling filtration.
abstract: The removal of styrene-polluted air emissions by biotrickling filtration was performed to evaluate the influence of using nitrate and urea as a nitrogen source in the nutrient solution supplied to two bioreactors run in parallel under the same operational conditions for 3 months. The use of urea resulted in less biomass content along the packed bed and better performance of the process, with a maximum elimination capacity (EC) of 57.6 g C m(-3 )h(-1) (removal efficiency (RE) of 88.3% and empty bed residence time (EBRT) of 60 s), which was around 54% higher than when using nitrate. EBRTs of 60, 30 and 15 s were evaluated with a urea-based nutrient supply. By decreasing the EBRT from 60 to 30 s the styrene concentration that could be treated with REs above 80% was almost the half, from 1,100 to 600 mg C m(-3), resulting in ECs of 52.8 g C m(-3) h(-1). Working at 15 s was not possible to obtain REs higher than 40% with a maximum EC of 28.5 g C m(-3) h(-1).
authors: Departament d'Enginyeria Química, Escola Tècnica Superior d'Enginyeria, Universitat de València, Dr. Moliner, 50, 46100, Burjassot (València), Spain.
authors: Feliu
authors: F
authors: Sempere
authors: Vicente
authors: V
authors: Martínez-Soria
authors: Jordi
authors: J
authors: Palau
authors: Josep-Manuel
authors: JM
authors: Penya-Roja
authors: Pau
authors: P
authors: San-Valero
authors: Carmen
authors: C
authors: Gabaldón
mesh_terms: D000397:Air Pollution; D001673:Biodegradation, Environmental; D018533:Biomass; D019149:Bioreactors; D002245:Carbon Dioxide / Q000378:metabolism; D005374:Filtration / Q000379:methods*; D005740:Gases / Q000032:analysis / Q000737:chemistry; D009566:Nitrates / Q000032:analysis / Q000737:chemistry / Q000378:metabolism*; D009584:Nitrogen / Q000737:chemistry; D020058:Styrene / Q000032:analysis* / Q000737:chemistry; D014508:Urea / Q000032:analysis / Q000737:chemistry / Q000378:metabolism*; D055549:Volatile Organic Compounds / Q000032:analysis* / Q000737:chemistry
chemical_list: D005740:Gases; D009566:Nitrates; D055549:Volatile Organic Compounds; D002245:Carbon Dioxide; D020058:Styrene; D014508:Urea; D009584:Nitrogen