Showing papers in "Biochemical Engineering Journal in 2006"

TL;DR: In this article, the adsorption of hexavalent chromium were conducted by varying various parameters such as contact time, pH, amount of adsorbent, concentration of adsorate and temperature.

TL;DR: In this article, the kinetics and thermodynamics of copper and lead biosorption onto Aspergillus niger pretreated with NaOH were studied with respect to pH, temperature and initial metal ion concentration.

TL;DR: In this article, a comparison of linear least-squares method and a trial and error non-linear method of three widely used isotherms, Langmuir, Freundlich, and Redlich-Peterson, were examined.

TL;DR: In this paper, a mathematical model was developed to describe the nickel ion sorption in a fixed bed column, which considered the hydrodynamics throughout the fixed-bed column as well as the sorption process in the liquid and solid phases.

TL;DR: A mathematical model was developed to describe the effects of temperature on the kinetic parameters of ethanol fermentation by the flocculating yeast, Saccharomyces cerevisiae M30, using cane molasses as the substrate.

TL;DR: Although the concentration in phenol is significant, these results are in agreement with those reported in the literature for phenol removal abilities in different systems and the Haldane model is still acceptable.

TL;DR: In this paper, the effect of temperature and carbon source on denitrification was explored, and it was observed that a temperature change from 10 to 20°C exerted a greater effect on both the specific denitification and carbon consumption rates than a further temperature increase from 20 to 30°C, which was also evident in the corresponding temperature coefficient values.

TL;DR: In this article, an anaerobic/aerobic-anoxic process (referred to as an AOA process) using a sequencing batch reactor (SBR) was proposed for simultaneous phosphorus and nitrogen removal from wastewater.

TL;DR: The immobilization procedure developed provides a promising solution for application of lipase in aqueous and microaqueous reaction system and provides an appreciable stabilization of the biocatalyst, changing its thermal deactivation profile.

TL;DR: In this paper, the authors used MRS broth (Man, Rogosa & Sharpe medium for lactobacilli strains) as a culture medium for biosurfactant production.

TL;DR: Results obtained showed that supplemented cheese whey and molasses media can be used as a relatively inexpensive and economical alternative to synthetic media for biosurfactant production by probiotic bacteria, thus an attractive alternative as many of the potential applications for biosURfactants depend on whether they can be produced economically.

TL;DR: In this article, the second-order kinetics of Pb2+ biosorption with dead Sargassum sp. as a biosorbent for aqueous solutions was studied.

TL;DR: In this article, a series of experiments with 0, 1, 3, 5, and 7 grams of calcium 2+ /l using calcium chloride were performed to evaluate the effect of various calcium concentrations on anaerobic digestion of swine wastewater.

TL;DR: In this article, a batch hydrolysis of oil palm empty fruit bunch fiber was performed at operating temperature 120°C using various concentration of sulfuric acid (2-6%) and reaction time (0-90min).

TL;DR: The results showed that the models proposed adequately described the dynamic behaviors of biodegradation by C. tropicalis, and illustrated that m -cresol biodegrading velocity was higher than that without phenol.

TL;DR: In this article, the results of a laboratory scale investigation aimed at evaluating the effectiveness of mature municipal landfill leachate treatment by a biological stage, carried out in a periodic biofilter with granular biomass (SBBGR), followed by a chemical oxidation step, performed using ozone or Fenton, for further COD removal.

TL;DR: The results presented here clearly indicate that the SVR is an attractive alternative to artificial neural networks for the development of soft-sensors in bioprocesses.

TL;DR: Equilibrium, kinetics and thermodynamic studies on the removal of Acid Red 57 by biosorption onto dried Cephalosporium aphidicola cells have been investigated in a batch system and the pseudo-second-order kinetic model was observed to provide the best correlation of the experimental data among the kinetic models studied.

TL;DR: In this article, the batch kinetics of ethanol and biomass production from crude whey were studied using the Kluyveromyces marxianus strain MTCC 1288.

TL;DR: The results show that oxygen supply is crucial for carotenoid production in P. rhodozyma liquid cultures, with a strong linear correlation with the oxygen transfer rate.

TL;DR: In this article, a continuous-flow (CF) microchip was fabricated using polydimethylsiloxane (PDMS)/glass laminate for efficient polymerase chain reaction (PCR).

TL;DR: In this article, the combination of low severity steam explosion and superfine grinding has been studied with respect to side products generation and enzymatic hydrolysis efficiency in rice straw.

TL;DR: In this paper, a new biosorbent using chemically modified orange peel and its biosorption of lead ion was studied, and the effect of pH, shaking time, s/l ratio, pH, and temperature on the biosorbents was investigated.

TL;DR: In both cereal media, cell immobilization within cereal fiber and the presence of cereal extracts had a synergistic effect on the gastrointestinal tolerance, which enhanced the tolerance of L. plantarum to bile juice.

TL;DR: Results showed that the NaCS/PDMDAAC microcapsule has desirable properties – such as biomass enrichment in the micro Capsule, enhanced substrate tolerance and stable activity of cells, operation convenience for continuous culture – for the microbial production of 1,3-propanediol.

TL;DR: The N-terminal sequence of the purified enzyme showed a significant homology with the family 1 β-glucosidases of Trichoderma reesei and Humicola isolens even though these two enzymes are much smaller in size.

TL;DR: Although the system operated in laminar flow under all the conditions investigated in this study, excess thricome stress was prevented only at relatively low air flow rates, corresponding to culture speeds lower than 0.21 m s −1 .

TL;DR: In this article, an approach for automated, continuous and rapid extraction of flavonoids from Saussurea medusa Maxim dried cell cultures has been developed in a new-designed dynamic microwave-assisted extraction system.

TL;DR: In this paper, the kinetics of the production of biodiesel by esterification of butyric acid with methanol, catalysed by lipase from Mucor miehei, was studied in two types of systems, namely, n-hexane microaqueous and biphasic (nhexane/water) containing different amounts of water The experimental results were fit to a Ping-Pong mechanism and the constants found in the rate expression were determined.

TL;DR: Under optimal conditions, the proposed immune-biosensor exhibited a good conductometric response relative to AFB1 concentration in a linear range from 0.5 to 10 ng/ml with a relatively low detection limit, and showed an acceptable accuracy compared with those obtained from ELISA.