in this study the catalytic dehydrogenation of ethylbenzene to styrene was investigated in a simulated tubular sodalite membrane reactor. the high quality microporous sodalite membrane was synthesized by direct hydrothermal method and characterized by single gas permeation measurements. the performance of the prepared membrane showed high potential for application in a dehydrogenation membrane ...

The fermentation kinetics of penicillin production by Penicillium chrysogenum was carried out at 27°C and pH 6.0. Batch and repeated batch fermentations using agar-immobilized cells in fluidized bed bioreactor were studied for their potential application in production of penicillin from lactose, a fermentable sugar. Kinetics of immobilized cell fermentation, showed the penicillin yield of ~0.01...

On-site biological treatment has been used for groundwater cleanup from industrial and agricultural chemicals. The pump-and-treat efficiency is controlled by retardation of contaminants by sorption onto the saturated subsurface solids and by the presence of non-aqueous-phase liquids in the aquifer. On-site bioreactors have been widely used for treatment of contaminants such as petroleum hydroca...

This study investigated soluble organic nitrogen (sON) activity in batch reactors mimicking nitrifying moving bed biofilm (MBBRs). work was divided into two objectives focusing on the production and degradation of sON, respectively. For first objective, a synthetic feed that did not contribute any used results indicated irrespective presence influent carbon (0 versus 400 mg COD/L) reactors, sON...

heavy metals due to their non biodegradability properties and can accumulate in living tissues, thus becoming concentrated throughout the food chain and can be readily absorbed into the human body. among them manganese was examined in this study as a pollutant. the aim of this study is the manganese removal from aqueous solution using a windy sand fixed bed column of sistan plain. flow rate, in...

Dechlorination of 2,4,6-trichlorophenol was performed within a magnetically stabilized fluidized bed (MSFB), containing a palladized iron (Pd/Fe) catalyst entrapped within alginate beads. Kinetic parameters of this multistep reaction yielding phenol as a final product were preliminarily defined in a batch system using four different intermediates as substrates for Pd/Fe catalyzed dechlorination...

The most essential limitation of batch-injection analysis (BIA) methodology compared to other flow methods (CFA, FIA, SIA) is the lack of possibility of on-line sample processing in the measuring system. Some procedures of on-line sample pretreatment in BIA are possible by changing the plastic tip of the automatic micropipette used for sample injection into a flow-through reactor, e.g. by packi...

The efficacy of activation methods and coupling were studied in the context of performance in batch and fixed bed binding experiments utilizing cell culture fluids or blood plasma as feedstock. Conclusions were drawn regarding selection of solid phase according to pore size, rigidity, pH stability, Chemistry of derivation and activation, and gross concentration of immobilized ligand require...

conclusions the findings of the current study indicate that at high concentrations of salt, the growth of bacteria reduces so that it stops at a concentration of 50 mg l-1 (5%). thus, the bacterium is halotolerant or halophilic. with an increase in phenol concentration, the growth rate increased. phenol toxicity appears at a concentration of 600 mg l-1. results the phenol concentration of 600 m...