Showing papers in "Biochemical Engineering Journal in 2008"

TL;DR: In this article, the authors compared ANN-GA and Response Surface Methodology (RSM) for fermentation media optimization, and found that the ANN algorithm outperformed RSM in terms of sensitivity analysis and optimization ability.

TL;DR: In this paper, microwave-based heating was used to pretreat switchgrass, which was then hydrolyzed by cellulase enzymes, and the results demonstrate that microwave-assisted alkali treatment is an efficient way to improve the enzymatic digestibility of switchgrass.

TL;DR: This paper reviews four isolation methods of bacterial polyhydroxyalkanoates and presents new methods like spontaneous liberation of poly(3-hydroxybutyrate), dissolved air flotation, air classification, or by using supercritical CO2.

TL;DR: In this paper, the adsorption of Cu(II) ions from aqueous solution by rubber (Hevea brasiliensis ) leaf powder (RHBL) was studied in a batch adaption system.

TL;DR: In this article, the effect of low temperature pre-treatment on the efficiency of thermophilic anaerobic digestion of primary and secondary waste sludge was investigated, and the results suggest that a short period (9 h) low-temperature pretreatment should be enough to enhance methane production through thermophilicity of sludge.

TL;DR: In this article, a biocompatible ferrofluid based on dextran-coated Fe3O4 magnetic nanoparticles (MNPs) was prepared through a one-step method.

TL;DR: The possibility of regulating PHA monomer composition and associated polymer properties by controlling RT and pH during acidogenic pretreatment was discussed.

TL;DR: Mesophilic anaerobic digestion of slaughterhouse waste and its co-digestion with the organic fraction of municipal solid waste (OFMSW) have been evaluated as discussed by the authors.

TL;DR: The results suggest that whole-cell ROL immobilized on BSP is a promising biocatalyst for producing BDF from oil.

TL;DR: In this article, the acid hydrolysis was carried out in an acid recycle process and detoxification of hydrolysate was performed by electrodialysis, two cycles of acidic treatments increased the reducing sugar concentration from 28 to 63.

TL;DR: Filamentous fungi Trichoderma reesei are considered to be one of the most efficient hyper producers of cellulase that is used in industry and were carried out using high concentration of cellulose to substitute glucose with the aim to improve cellulase production while trying to reduce production costs.

TL;DR: In this paper, a study of the effect of organic loading rate and hydraulic retention time (HRT) on the performance, stability and microbial communities of a laboratory-scale completely stirred tank anaerobic reactor treating two-phase olive mill solid residue (OMSR) was carried out at mesophilic temperature (35 °C).

TL;DR: In this article, two different approaches were studied and compared to improve Anammox biomass retention minimizing washout events: (1) formation of granular biomass using influents with high inorganic salts concentrations by production of saline precipitates acting as promoters for biomass aggregation (reactor SBR1); (2) use of zeolite particles as carrier material for anammox biofilm formation (reace SBR2), both approaches allowed the reduction of biomass washout in the effluent to values as low as 18mg VSS L−1 (SBR1)

TL;DR: Key insights are provided into the improvement of succinic acid production and the modelling of inhibition kinetics and a growth kinetic model considering both substrate and product inhibition is proposed, which adequately simulates batch fermentation kinetics.

TL;DR: In this article, a dual chambered microbial fuel cell (MFC) was evaluated in composite chemical wastewater treatment, and the feasibility of producing bioelectricity from wastewater treatment was found to be dependent on the substrate loading rate.

TL;DR: In this paper, a thermophilic strain of Bacillus subtilis DM-04 under solid-state fermentation, potato peel followed by I. cylindrica grass supported maximum protease production.

TL;DR: In this article, a Doehlert experimental design was applied to optimize T. trogii lignocellulolytic enzyme production in solid-state fermentation, and the impact on enzyme production of three quantitative variables, namely pH, copper and nitrogen concentrations, was investigated by using a wood-based solid medium supplemented with malt extract.

TL;DR: This work investigated an approach to enhance the production of these enzymes by co-culturing Trichoderma reesei and Aspergillus niger in a bioreactor to convert cellulose substrate into soluble sugars through a synergetic action of enzyme complex simultaneously produced by these two fungi.

TL;DR: Both biosurfactants could recover oil more effectively than three synthetic surfactants, including polyoxyethylene sorbitan monooleate (Tween 80), sodium dodecyl benzene sulfonate (SDBS), and sodium alkyl polypropylene oxide sulfate (Alfoterra 145-5PO).

TL;DR: Cloned the PEP carboxykinase (enconded by the pckA gene) of Mannheimia succiniciproducens, which converts PEP to oxaloacetate as a favorable reaction, was cloned.

TL;DR: In this paper, the chromium adsorptive potential of polysaccharide produced by a novel cyanobacterium Lyngbya putealis HH-15 was presented.

TL;DR: In this article, the performance of anaerobic granular sludge in removing malachite green (MG) from aqueous solution was investigated with different conditions, such as pH, ionic strength, initial concentration and temperature.

TL;DR: Cultural conditions for xylanase production by an alkalophilic Bacillus pumilus strain MK001 were optimized under submerged fermentation to be optimal for maximum enzyme production.

TL;DR: In this article, the antibacterial activity of chitosan membranes was investigated by a conductimetric assay using a Bactometer, and the influence of the deacetylation degree (DD) of the chitosa on inhibiting the growth of Staphylococcus aureus was investigated.

TL;DR: In this paper, the Durian peel (DP) was evaluated for its ability to remove acid dye from aqueous solutions and the equilibrium data were best represented by Langmuir isotherm model with maximum monolayer adsorption capacity of 63.29% at 30°C.

TL;DR: In this article, a novel compound adsorbent was characterized by using scanning electron microscope (SEM) and FI-IR spectrum, which showed that hydrogen bond was one of the combination strengths between chitosan and TiO2.

TL;DR: In this paper, the effect of corn steep liquor along with glucose, molasses, Tween80 and MnSO4 on l -(+)-lactic acid fermentation by Lactobacillus rhamnosus CGMCC 1466.

TL;DR: The model incorporates the concept of production and degradation of extracellular polymeric substances (EPS or ECP) as part of SMP, and was used to predict SMP production during hydraulic and organic shock load experiments in anaerobic continuously stirred tank reactors (CSTRs).

TL;DR: In this article, the behavior of S. platensis was investigated through fed-batch pulse-feeding cultures performed at different carbon dioxide feeding rates (F = 0.44 −1.03 −g −L−1−d−1) and photosynthetic photon flux density (PPFD = −80 −250 −μmol photons m−2 −s−1).

TL;DR: In this article, the effects of pH control and nutrient supplementation of the hydrolysate on fermentation performance were investigated, and the best result, 35.54 g/l lactic acid (0.99 g/g glucose consumed) was obtained during the pH-controlled fermentation of a cellulose pulp supplemented with MRS components.