Degradation of chlorinated compounds by Penicillium camemberti in batch and up-flow column reactors

Taseli, BK
Gökçay, Celal Ferdi
A Penicillium camemberti strain isolated in this laboratory was studied for its ability to degrade chlorinated compounds including pentachlorophenol (PCP), 2-chlorophenol and trichloroacetic acid. The batch experiments were conducted in shake flasks using PCP as co-substrate resulting in around 56% PCP removal by the fungus. Experiments in shake flasks not containing acetate but Tween 80, produced 86% of PCP and 53% of 2-chlorophenol removals in 21 days. PCP was also fed to a column reactor with an adsorbable organic halogens (AOX) concentration of 63.4 mg/l. On the fourth day of operation, AOX removal was 77%, but this steadily dropped to 18.8% on the 18th day.


Preparation of cross-linked tyrosinase aggregates
Aytar, Burcu Selin; Bakir, Ufuk (Elsevier BV, 2008-02-01)
Tyrosinase from mushroom was immobilized as a cross-linked enzyme aggregate (CLEA) via precipitation with ammonium sulfate and cross-linking with glutaraldehyde. The effects of precipitation and cross-linking on CLEA activity were investigated and the immobilized tyrosinase was characterized. Sixty percent ammonium sulfate saturation and 2% glutaraldehyde were used; a 3-h cross-linking reaction at room temperature, at pH 7.0 was performed; particle sizes of the aggregates were reduced; consequently, 100% ac...
TUKENMEZ, I; OZILGEN, M; BICER, A (Elsevier BV, 1991-11-01)
Rumen microorganisms were used in a batch fermentor to investigate whether they could be used to produce acetic acid, propionic acid, butyric acid, and methane from cotton fibers. The kinetics of product formation were studied with the initial medium pH values of 6.0, 7.0, and 8.0. Propionic acid, butyric acid, and methane production were growth associated; acetic acid production was found to be nongrowth associated. The largest amounts of bacteria and protozoa were attained with the initial pH of 7.0. T...
Kinetics of riboflavin production by Brewers' yeasts
Tamer, I.M.; Özilgen , Mustafa; Ungan, Suat (Elsevier BV, 1988-12)
The kinetics of riboflavin production by Saccharomyces cerevisiae and Saccharomyces carlsbergensis in synthetic media and wort were studied. The results indicated that riboflavin was produced by growing cells only. Riboflavin production rate was proportional to growth rate of the yeasts in the exponential phase. Riboflavin was depleted in the stationary phase. The depletion rate was expressed with a first-order kinetic expression in yeast concentration. The kinetics of substrate utilization and ethanol prod...
Substrate interactions during the biodegradation of benzene, toluene and phenol mixtures
Abu Hamed, T; Bayraktar, E; Mehmetoglu, T; Mehmetoglu, U (Elsevier BV, 2003-09-30)
Benzene, toluene and phenol were degraded completely at high initial concentrations by Pseudomonas putida F I ATCC 700007. Two hundred and fifty milligram per litre benzene, 225 mg/l toluene and 200 mg/l phenol were degraded individually in 19, 14 and 3 5 h, respectively. The biodegradation times increased on increasing the substrate concentration. The maximum biodegradation rates were 149 mg benzene/g dry cell h for 60 mg/l benzene, 44 mg toluene/g dry cell h for 110 mg/l toluene and 102 mg phenol/g dry ce...
Production of L-aspartic acid by biotransformation and recovery using reverse micelle and gas hydrate methods
Aydogan, Oezlem; Bayraktar, Emine; Parlaktuna, Mahmut; Mehmetoglu, Tanju; Mehmetoglu, Uelkue (Informa UK Limited, 2007-01-01)
L-Aspartic acid (L-Asp) was produced using Escherichia coli (ATCC 11303), and its recovery from the reaction mixture was studied using reverse micelle and gas hydrate methods. The effect of initial substrate concentration on L-Asp production was also investigated, and inhibition was shown to occur above 0.75 mol L-1. The values of the kinetic constants were determined as r(max) = 2.33 x 10(-4) mol L-1 min(-1), K-M = 0.19 mol L-1, and K-ss = 3.98 mol L-1. The reverse micelle phase used for extraction contain...
Citation Formats
B. Taseli and C. F. Gökçay, “Degradation of chlorinated compounds by Penicillium camemberti in batch and up-flow column reactors,” PROCESS BIOCHEMISTRY, pp. 917–923, 2005, Accessed: 00, 2020. [Online]. Available: