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Showing papers in "Process Biochemistry in 1992"


Journal ArticleDOI
TL;DR: Solid-state fermentation has gained renewed interest and fresh attention from researchers owing to its importance in recent developments in biomass energy conservation, in solid waste treatment and in its application to produce secondary metabolites as discussed by the authors.

514 citations


Journal ArticleDOI
TL;DR: A comprehensive review of the state of the art in bio-flavour synthesis can be found in this paper, with emphasis on currently commercialised processes and regulatory aspects of biotechnological production of aroma compounds.

252 citations


Journal ArticleDOI
TL;DR: In this article, five technologies for in-situ product recovery have been compared on the basis of design parameters and energy efficiency: stripping, adsorption, liquid-liquid extraction, pervaporation and membrane solvent extraction.

232 citations


Journal ArticleDOI
TL;DR: In this article, scale-up strategies for solid state fermentation systems are discussed and the development of well-founded scaleup criteria, such as those for submerged fermentation processes, is vital for extensive commercialization of solid state fermentation systems.

187 citations


Journal ArticleDOI
TL;DR: In this article, partial removal of some of the organic matter and phenolic compounds, by aerobic pretreatment with Geotrichum candidum is described, which provides a partially purified effluent that, for the same COD level as that of the original OMW, is degraded anaerobically more rapidly than original OMW as a result of the increase in methanogenic activity.

127 citations


Journal ArticleDOI
TL;DR: The scale-up of column fermenters for ethanol fermentation from sugar cane bagasse by Schwanniomyces castellii CBS 2863 by 6 to 410 scale factors from 10 g moist substrate size was achieved efficiently by maintaining heat and water balances in the media.

85 citations


Journal ArticleDOI
TL;DR: Mineral sources such as CaCO3 and KH2PO4 proved to be important factors influencing polysaccharide production and quality and the use of high carbon to nitrogen ratios in the defined medium resulted in a major increase in the broth consistency index.

83 citations


Journal ArticleDOI
TL;DR: The marine microalga Isochrysis galbana Parke is presented as an alternative source of eicosapentaenoic acid (EPA) and indicated as a starting point for a large scale mass culture system which would develop I. galbANA's potential.

83 citations


Journal ArticleDOI
TL;DR: The amylase from B .

75 citations


Journal ArticleDOI
TL;DR: In this paper, a preferred process for efficient bioconversion of waste paper to ethanol was described for efficient waste paper processing and a new fermenter design well suited for waste paperprocessing or for cellulase production was described.

59 citations


Journal ArticleDOI
TL;DR: This review reviews current research on the application of biotechnology to the bleaching of kraft pulp and a reduced need for active chlorine has been obtained by boosting the bleachability of pulp through pretreatment with hemicellulose hydrolysing enzymes.

Journal ArticleDOI
TL;DR: The need for intensive screening to select potent cultures particularly suited to the system concerned is indicated since it is clear that the cultures which are good producers in submerged fermentation processes cannot be relied upon to perform well in solid-state fermentations.

Journal ArticleDOI
TL;DR: In the present work neural network programming was applied both in real-time estimation and multi-step ahead prediction of enzyme activity and biomass dry matter in fungal Aspergillus niger glucoamylase fermentation.

Journal ArticleDOI
TL;DR: Molecular aspects of penicillin and cephalosporin acylases are reviewed briefly and some of the resemblances between the sequences of these, beta-lactamases and Penicillin binding proteins are discussed.

Journal ArticleDOI
TL;DR: The fully mixed reactors are adequate for volatile fatty acid production from olive mill wastewaters (OMW), although an anaerobic filter is advisable for methanogenesis as mentioned in this paper.

Journal ArticleDOI
TL;DR: Sorghum could play a pivotal role in developments towards agricultural improvement in some of the poorest countries of the world if relevant scientific work is carried out to produce the yield, quality and knowledge required by locally-based industries.

Journal ArticleDOI
TL;DR: In this paper, the effects of calcium chloride and sorbose addition on cellulase production, and the kinetics of starch-derived inducers are presented, compared with that of pure cellulose, CMC, xylan and prehydrolysate of pine wood.

Journal ArticleDOI
TL;DR: A laboratory-scale two-phase anaerobic digestion system made up of a separate acid and methane tank was characterized in terms of its extracellular enzymes and acidogen profiles, showing better gas production and higher levels of cellobiase, lipase and amylase activities.

Journal ArticleDOI
TL;DR: Saccharomyces cerevisiae cells were immobilized on three supports—calcium alginate beads, raw and hexamethylene diamine treated bagasse—for their comparative assesment in terms of cell retention on to the carrier and metabolic and physiological activities of the immobilized cells.

Journal ArticleDOI
TL;DR: In this article, a free enzyme membrane reactor (FEMR) was used for the hydrolysis of fish proteins in an aqueous extract of Alaskan pollack by a protease.

Journal ArticleDOI
TL;DR: Penicillin acylase was extracted from E. Coli by osmotic shock by factorial design, scaled up and integrated to a purification process in order to compare it with purification processes reported in the literature.

Journal ArticleDOI
TL;DR: In this paper, the authors describe the characterization of three dual-impeller combinations (D/T = 0·53) for the mixing of dehydrated-reconstituted fermentation broths of Xanthomonas campestris that matched rheology to the actual broths.

Journal ArticleDOI
TL;DR: A method for the release of anthraquinones while maintaining the viability of Morinda citrifolia cells by interaction of lipases with the tonoplast and plasma membrane lipids is presented.

Journal ArticleDOI
TL;DR: A cells-to-carrier ratio of 3:2 was found to be optimum throughout these studies and the effect of recycle ratio indicated diffusion barriers to substrate transport.

Journal ArticleDOI
TL;DR: In this article, it was shown that the thermodynamically unfavourable oxidation of propionic acid takes place even at a positive ΔG′ because of energy coupling, which is known as energy coupling.

Journal ArticleDOI
TL;DR: Preparations of exochitinase which were electrophoretically homogeneous have been prepared from seeds of Zea mays and Coix lachryma-jobi by extraction, ammonium sulphate fractionation and gel filtration, and the purified preparations did not exhibit lysozyme activity.

Journal ArticleDOI
TL;DR: In this paper, the effect of sludge solids concentration on the microbial leaching of metals from anaerobic municipal sludge was studied in a batch process using a strain of T. ferrooxidans.

Journal ArticleDOI
TL;DR: In this article, perlite modified by silanization and treatment with glutaraldehyde was used as a support for the co-immobilization of glucose oxidase and catalase.

Journal ArticleDOI
TL;DR: The influence of varying concentrations of potassium bromate on enzyme development in Nigerian millet ( Pennisetum maiwa ) during sprouting and growth was assessed in this article, where the optimum diastatic, cellulolytic and hemicellulolytic activities were observed on the fifth day of germination at 28°C when 125 mg/litre of Bromate was applied.

Journal ArticleDOI
TL;DR: Glucoamylase (1,4 α-d glucan glucohydrolase, EC 3.2.3) was covalently immobilized on porous glass fibres and beads as discussed by the authors.