Search results for "Cometabolism"
showing 5 items of 5 documents
Kinetics of Cometabolic Biodegradation of 4-Chlorophenol and Phenol by Stenotrophomonas Maltophilia KB2
2018
The cometabolic biodegradation of 4-Chlorophenol (4-CP) by the Stenotrophomonas maltophilia KB2 strain in the presence of phenol (P) was studied. In order to determine the kinetics of biodegradation of both substrates, present alone and in cometabolic systems, a series of tests was carried out in a batch reactor changing, in a wide range, the initial concentration of both substrates. The growth of the tested strain on phenol alone was described by Haldane kinetic model (mm = 0:9 1/h, Ksg = 48:97 gg/m3, KIg = 256:12 gg/m3, Yxg = 0:5715). The rate of 4-CP transformation by resting cells of KB2 strain was also described by Haldane equation and the estimated parameters of the model were: kc = 0…
Kinetics of cometabolic biodegradation of 4-chlorophenol and phenol by Stenotrophomonas maltophilia KB2
2018
The cometabolic biodegradation of 4-Chlorophenol (4-CP) by the Stenotrophomonas maltophilia KB2 strain in the presence of phenol (P) was studied. In order to determine the kinetics of biodegradation of both substrates, present alone and in cometabolic systems, a series of tests was carried out in a batch reactor changing, in a wide range, the initial concentration of both substrates. The growth of the tested strain on phenol alone was described by Haldane kinetic model (mm=0:9 1/h,Ksg=48:97 gg/m3,KIg=256:12 gg/m3, Yxg=0:5715). The rate of 4-CP transformation by resting cells of KB2 strain was also described by Haldane equation and the estimated parameters of the model were:kc=0:229 gcc =gxh…
Application of Bioaugmentation to Improve Pharmaceutical Wastewater Treatment Efficiency
2019
Ecological harm and human health risks caused by environmental pollution with active pharmaceutical ingredients (API) nowadays is recognised as issue of growing concern. Widespread presence of human and veterinary API in aquatic environment clearly indicates persistence and low removal efficiency of these compounds at conventional pharmaceutical and municipal wastewater treatment plants (WWTP). Bioaugmentation of activated sludge systems with specialized microorganisms could be a powerful and environmentally friendly tool to enhance the removal efficiency of recalcitrant API. Selection of inoculum strains, that have appropriate enzymatic pathways to metabolise complex molecules of API, belo…
Variability of pesticide mineralization in individual soil aggregates of millimeter size
2002
The aim of this study was to compare the 2,4-D mineralization in individual aggregates of millimeter size (3 size classes and 96 aggregates per size class). 14 CO 2 coming from the mineralization of 14 C ring-labeled 2,4-D and evolved by each aggregate incubated in microtiter plates was trapped with barium hydroxide on filters and measured using a Phosphorimager. We observed an important variability of mineralization in aggregates of each size class and in the different size classes of aggregates. The main factors responsible for these fluctuations could be a heterogeneous distribution of degrading microorganisms or of available carbon necessary for cometabolism.
Modelling of the cometabolic decomposition of 4-chlorophenol and phenol by the Stenotrophomonas maltophilia KB2 strain
2017
Zaprezentowano model rozkładu 4-chlorofenolu przez szczep Stenotrophomonas maltophilia KB2 w obecności fenolu jako substratu wzrostowego. Opracowanie tego modelu wymagało wykonania czterech serii badań: biodegradacji różnych dawek czystego fenolu, biodegradacji różnych dawek czystego 4-CP, biodegradacji 4-CP w obecności fenolu przy różnym stosunku stężeń obu substratów oraz biodegradacji 4-CP przez komórkiw fazie spoczynku, indukowane wstępnie fenolem. Szczegółowo omówiono sposoby wyznaczania poszczególnych parametrów równań opisujących szybkość degradacji substratów wzrostowego i niewzrostowego oraz przyrostu biomasy. W oparciu o stworzoną bazę danych obliczono m.in. stałe półnasycenia KSg…