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| Paca,Jan; Kosteckova,Alena; Pacova,Leona; Prell,Ales; Halecky,Martin; Paca Jr.,Jan; Stiborova,Marie; Kozliak,Evguenii; Soccol,Carlos Ricardo. |
| Kinetics of phenol biodegradation using suspended biomass of Comamonas testosteroni Pb50 (monoculture) was measured under conditions of nutrient abundance, limitation, and prolonged cell starvation in a fed-batch reactor, with phenol being the sole carbon and energy source. The pre-washed cells were applied for measurement of the phenol and oxygen uptake rates at varied starting phenol concentrations with the kinetic parameters calculated using the Haldane model. The results revealed that nutrient limitation significantly suppressed the maximum value of exogenous respiration rate while the endogenous respiration rate, affinity and tolerance to phenol increased. By contrast, cell starvation resulted in a drop of both the exogenous and endogenous respiration... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Respirometry; Kinetics; Phenol; Nutrition stress. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000600030 |
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| Zapotocky,Lubos; Halecky,Martin; Vanek,Tomas; Paca,Jan; Kozliak,Evguenii; Jones,Kim; Soccol,Carlos Ricardo. |
| This aim of study was to compare the performance of a biofilter (BF) and trickle bed reactor (TBR) under increased styrene loading with a constant acetone load, 2 gc/m3/h. At styrene loading rates up to 30 gc/m3/h, the BF showed higher styrene removal than TBR. However, the BF efficiency started to drop beyond this threshold loading and could never reach steady state, whereas the TBR continued to yield a 50% styrene removal. The acetone removal remained constant (93-98%) in both the reactors at any styrene loading. Once the overloading was lifted, the BF recovered within 26 min, whereas the TBR efficiency bounced back only to 95%, gradually returning to complete removal only in 10 h. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biofiltration; Styrene; Acetone; Vapor mixtures; Two reactors. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132014000500782 |
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| Gerrard,Andrew Mark; Havranek,Josef; Novak,Vratislav; Halecky,Martin; Jones,Kim; Soccol,Carlos Ricardo; Paca,Jan. |
| The aim of this work was the study a trickling biofilter, where water was circulated throughout the bed. In the first steady state experiment, the packing materials used were 25mm Pall rings. The airflow rate was increased gradually and the concentration of styrene in the air stream was held constant. In the second experiment, 15mm Pall rings were used. In this case, the feed contained both styrene and a small amount of acetone. The concentration of acetone and the air flow rate were kept constant, but the styrene inlet concentration was increased. The concentrations were measured at the input, and also at an intermediate and the outlet position in the biotrickling filter to determine the concentration profile along the reactor. Using the values of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biotrickling filter; Steady state; Unsteady state; Mathematical models; Styrene; Acetone. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000500028 |
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