The Experts below are selected from a list of 3123 Experts worldwide ranked by ideXlab platform
R Borja - One of the best experts on this subject based on the ideXlab platform.
-
anaerobic digestion of wastewater produced in the manufacture of Cellulosic pulp from wheat straw in Immobilised Cell bioreactors
Resources Conservation and Recycling, 1995Co-Authors: V Alonso, Antonio Martin, R BorjaAbstract:Abstract The kinetics of the anaerobic digestion of wastewater produced in the manufacture of Cellulosic pulp from wheat straw (COD of 38.8 g/l) were studied. Laboratory experiments were carried out in 1-1 bioreactors containing supports of different chemical composition and features, namely: saponite, montmorillonite, bentogel, sepiolite (pansil) and PVC, to which the microorganisms responsible for the process adhered. The process was simultaneously performed in a control digester with suspended biomass. The bioreactors used were batch fed by incrementing the volume loads from 10 to 200 ml over a period of 5 months. Inhibition phenomena and low biodegradability of the wastewater (29–30%) were observed in the COD range studied (0.4–7.8 g/l) due to the accumulation of lignin and its derivatives. The model used showed a slight influence of the support on the kinetics of the biodegradation.
-
kinetics of methane production from wine distillery wastewater in an Immobilised Cell bioreactor using sepiolite as support medium
Resources Conservation and Recycling, 1994Co-Authors: R Borja, Antonio Martin, M Luque, V AlonsoAbstract:A kinetic study of the anaerobic digestion of wine distillery wastewater (WDW) was carried out in a semicontinuous, well-stirred fermenter with microorganisms immobilized on sepiolite support. Substrate concentrations equal to or lower than 3.6 g COD/1 within the reactor resulted in a methane production rate that was first-order with respect to biodegradable substrate concentration. The apparent rate constant was proportional to the volatile suspended solids concentration and the product yield coefficient, Yp was 0.2851 CH4STP/g COD.
-
kinetics of methane production from palm oil mill effluent in an Immobilised Cell bioreactor using saponite as support medium
Bioresource Technology, 1994Co-Authors: R Borja, C J BanksAbstract:A kinetic study of the anaerobic digestion of palm oil mill effluent (POME) was carried out in a continuous, well-stirred digester with microorganisms Immobilised on saponite support granules. A COD removal of 96·2% was achieved in the reactor at a volumetric loading rate of 10·6 kg COD/m3 day (hydraulic retention time of 6·2 days); the methane production rate was first order with respect to biodegradable substrate concentration. The apparent rate constant was proportional to the volatile suspended solids concentration and the product yield coefficient, Yp, was 0·325 litre CH4 STP/g COD consumed.
-
semicontinuous anaerobic digestion of soft drink wastewater in Immobilised Cell bioreactors
Biotechnology Letters, 1993Co-Authors: R Borja, C J BanksAbstract:Saponite support considerably increased the kinetics of a. semicontinuous anaerobic digestion process treating soft drink wastewater showing values of the μmax andK kinetic parameters (Chen and Hashimoto model) 2.5 and 1.4 times higher than for bentonite and polyurethane support, respectively. This was significant at 95% confidence level.
John F Kennedy - One of the best experts on this subject based on the ideXlab platform.
-
use of Immobilised biocatalysts in the processing of cheese whey
International Journal of Biological Macromolecules, 2009Co-Authors: Maria R Kosseva, Parmjit S Panesar, Gurpreet Kaur, John F KennedyAbstract:Abstract Food processing industry operations need to comply with increasingly more stringent environmental regulations related to the disposal or utilisation of by-products and wastes. These include growing restrictions on land spraying with agro-industrial wastes, and on disposal within landfill operations, and the requirements to produce end products that are stabilised and hygienic. Much of the material generated as wastes by the dairy processing industries contains components that could be utilised as substrates and nutrients in a variety of microbial/enzymatic processes, to give rise to added-value products. A good example of a waste that has received considerable attention as a source of added-value products is cheese whey. The carbohydrate reservoir of lactose (4–5%) in whey and the presence of other essential nutrients make it a good natural medium for the growth of microorganisms and a potential substrate for bioprocessing through microbial fermentation. Immobilised Cell and enzyme technology has also been applied to whey bioconversion processes to improve the economics of such processes. This review focuses upon the elaboration of a range of immobilisation techniques that have been applied to produce valuable whey-based products. A comprehensive literature survey is also provided to illustrate numerous immobilisation procedures with particular emphasis upon lactose hydrolysis, and ethanol and lactic acid production using Immobilised biocatalysts.
-
bioutilisation of whey for lactic acid production
Food Chemistry, 2007Co-Authors: Parmjit S Panesar, John F Kennedy, Dina N Gandhi, Katarzyma BunkoAbstract:The disposal of whey, the liquid remaining after the separation of milk fat and casein from whole milk, is a major problem for the dairy industry, which demands simple and economical solutions. The bioconversion of lactose present in whey to valuable products has been actively explored. Since whey and whey permeates contain significant quantities of lactose, an interesting way to upgrade this effluent could be as a substrate for fermentation. Production of lactic acid through lactic acid bacteria could be a processing route for whey lactose and various attempts have been made in this direction. Immobilised Cell technology has also been applied to whey fermentation processes, to improve the economics of the process. A fermentative means of lactic acid production has advantages over chemical synthesis, as desirable optically pure lactic acid could be produced, and the demand for optically pure lactic acid has increased considerably because of its use in the production of poly(lactic acid), a biodegradable polymer, and other industrial applications. This review focuses on the various biotechnological techniques that have used whey for the production of lactic acid.
V Alonso - One of the best experts on this subject based on the ideXlab platform.
-
anaerobic digestion of wastewater produced in the manufacture of Cellulosic pulp from wheat straw in Immobilised Cell bioreactors
Resources Conservation and Recycling, 1995Co-Authors: V Alonso, Antonio Martin, R BorjaAbstract:Abstract The kinetics of the anaerobic digestion of wastewater produced in the manufacture of Cellulosic pulp from wheat straw (COD of 38.8 g/l) were studied. Laboratory experiments were carried out in 1-1 bioreactors containing supports of different chemical composition and features, namely: saponite, montmorillonite, bentogel, sepiolite (pansil) and PVC, to which the microorganisms responsible for the process adhered. The process was simultaneously performed in a control digester with suspended biomass. The bioreactors used were batch fed by incrementing the volume loads from 10 to 200 ml over a period of 5 months. Inhibition phenomena and low biodegradability of the wastewater (29–30%) were observed in the COD range studied (0.4–7.8 g/l) due to the accumulation of lignin and its derivatives. The model used showed a slight influence of the support on the kinetics of the biodegradation.
-
kinetics of methane production from wine distillery wastewater in an Immobilised Cell bioreactor using sepiolite as support medium
Resources Conservation and Recycling, 1994Co-Authors: R Borja, Antonio Martin, M Luque, V AlonsoAbstract:A kinetic study of the anaerobic digestion of wine distillery wastewater (WDW) was carried out in a semicontinuous, well-stirred fermenter with microorganisms immobilized on sepiolite support. Substrate concentrations equal to or lower than 3.6 g COD/1 within the reactor resulted in a methane production rate that was first-order with respect to biodegradable substrate concentration. The apparent rate constant was proportional to the volatile suspended solids concentration and the product yield coefficient, Yp was 0.2851 CH4STP/g COD.
Parmjit S Panesar - One of the best experts on this subject based on the ideXlab platform.
-
use of Immobilised biocatalysts in the processing of cheese whey
International Journal of Biological Macromolecules, 2009Co-Authors: Maria R Kosseva, Parmjit S Panesar, Gurpreet Kaur, John F KennedyAbstract:Abstract Food processing industry operations need to comply with increasingly more stringent environmental regulations related to the disposal or utilisation of by-products and wastes. These include growing restrictions on land spraying with agro-industrial wastes, and on disposal within landfill operations, and the requirements to produce end products that are stabilised and hygienic. Much of the material generated as wastes by the dairy processing industries contains components that could be utilised as substrates and nutrients in a variety of microbial/enzymatic processes, to give rise to added-value products. A good example of a waste that has received considerable attention as a source of added-value products is cheese whey. The carbohydrate reservoir of lactose (4–5%) in whey and the presence of other essential nutrients make it a good natural medium for the growth of microorganisms and a potential substrate for bioprocessing through microbial fermentation. Immobilised Cell and enzyme technology has also been applied to whey bioconversion processes to improve the economics of such processes. This review focuses upon the elaboration of a range of immobilisation techniques that have been applied to produce valuable whey-based products. A comprehensive literature survey is also provided to illustrate numerous immobilisation procedures with particular emphasis upon lactose hydrolysis, and ethanol and lactic acid production using Immobilised biocatalysts.
-
bioutilisation of whey for lactic acid production
Food Chemistry, 2007Co-Authors: Parmjit S Panesar, John F Kennedy, Dina N Gandhi, Katarzyma BunkoAbstract:The disposal of whey, the liquid remaining after the separation of milk fat and casein from whole milk, is a major problem for the dairy industry, which demands simple and economical solutions. The bioconversion of lactose present in whey to valuable products has been actively explored. Since whey and whey permeates contain significant quantities of lactose, an interesting way to upgrade this effluent could be as a substrate for fermentation. Production of lactic acid through lactic acid bacteria could be a processing route for whey lactose and various attempts have been made in this direction. Immobilised Cell technology has also been applied to whey fermentation processes, to improve the economics of the process. A fermentative means of lactic acid production has advantages over chemical synthesis, as desirable optically pure lactic acid could be produced, and the demand for optically pure lactic acid has increased considerably because of its use in the production of poly(lactic acid), a biodegradable polymer, and other industrial applications. This review focuses on the various biotechnological techniques that have used whey for the production of lactic acid.
Mauro Tomassetti - One of the best experts on this subject based on the ideXlab platform.
-
Toxicity order of cholanic acids using an Immobilised Cell biosensor
Journal of Pharmaceutical and Biomedical Analysis, 1996Co-Authors: Luigi Campanella, D. Mastrofini, Gabriele Favero, Mauro TomassettiAbstract:There is considerable published evidence of the use of Cells of various species to evaluate the toxicity of numerous compounds, many of pharmaceutical interest. The coupling of Cell colonies with a suitable transduction device has led to the development in recent years of toxicity biosensors based on the alteration of a process or a Cell metabolic function by the toxic substance under examination. A biosensor based on Immobilised yeast Cells (Saccharomyces cerevisiae) has been developed recently in this department for the purpose of performing a rapid toxicity test in aqueous environmental matrices. This biosensor has now been used in the toxicity screening of a number of sodium salts of conjugated and free cholanic acids. The “toxicity degree” scale, which was found by placing in decreasing order the values of the slopes of the straight lines obtained by quantifying changes in the behaviour of the respirometric curve, plotted before and after incubation, using known concentrations of cholanic acid sodium salts, was: deoxycholic acid > chenodeoxycholic acid > ursodeoxycholic acid > cholic acid, for free cholanic acids; and glycodeoxycholic acid > glycochenodeoxycholic acid > glycocholic acid, for glycocholanic acids. These values are in good agreement with published toxicity data obtained in vitro. This sensor can thus be considered to provide a valid instrument for the preliminary evaluation of the toxicity of organic compounds or drugs.
