Continuous ethanol fermentation from cheap sugar cane molasses was studied. Two strains of Saccharomyces cerevisiae were used, one of them flocculent, in order to evaluate the performance of fluidized tubular reactors, with and without support for yeast immobilisation (polyurethane foam and expanded clay argilate granules were tested). In this heterogeneous continuous system, with three phases,...

There is a scarcity of studies evaluating the influence different commonly marketed sugars in water kefir beverage production. Therefore, this study aimed to evaluate fermentation grains sugary solutions: brown, demerara, refined, coconut, and cane molasses. A total 10% each type sugar was dissolved sterile which were then added fermented for 48 h at room temperature. Analyses pH/acidity, solub...

OF PAPERS TWENTY-SECOND ANNUAL SUMMARY OF CHEMICAL LABORATORY REPORTS South African Sugar Factories, Season 1946-47~ By H. H. DODDS and J. L. DU Torr. For the third successive year rainfall, 32.02 inches, and humidity have been very low, though the rainfall was not quite so unfavourably distributed as in the two preceding years. The mean annual temperature, 69.4°F., was considerably above the a...

Sugar-cane stalks, 2.0 cm long, were used as a support for yeast immobilization envisaging ethanol production. The assays were conducted in 38.5 L fermenters containing a bed of stalks with 50% porosity. The operational stability of the immobilized yeast, the efficiency and stability of the process, as well as the best dilution rate were evaluated. Molasses from demerara sugar production was us...

The predominant types of commercially produced alcoholic beverages are beer, wine and spirits. Basic ingredients for beer are malted barley, water, hops and yeast. Wheat may be used. Nearly all wine is produced from grapes, although wine can be also made from other fruits and berries. Spirits are frequently produced from cereals (e.g. corn, wheat), beet or molasses, grapes or other fruits, cane...

During the course of our research into the use of cane by-products from sugar manufacturing, we have studied the isolation and structural determination of bioactive compounds present in sugarcane molasses. In this study, dehydrodiconiferylalcohol-9'-O-beta-D-glucopyranoside (1) and isoorientin-7, 3'-O-dimethyl ether (2) were isolated as antibacterial active compounds against cariogenic bacteria...

As a result of deterioration in the colour and polarisation of the VHP sugar caused by abnormal cane quality during October of the 1983/84 crushing season, it was decided to test a modified boiling system at Illovo as proposed by van Hengel at the SASTA Congress of 1983. The results achieved for the period before, during and after the trial are presented and compared. It was found that the qual...

In this study, we have shown the microbial alkaline protease production by using isolated Bacillus subtilis. Bacillus subtilis which produces an extracellular alkaline protease was isolated from meet surface purchased from local Egyptian markets. Maximum enzyme activity was achieved when the bacterium was grown on corn steep liquor (2.0 %, w/v) instead of soybean meal (2 %) followed by casein h...

Industrial-scale production of biopolymers is restricted by its elevated production costs in comparison with those associated with synthetic (no-biodegradable and no-biocompatible) polymers. In this study we tested for the first time two low-cost carbon substrates (i.e. carob pulp and fique juice) for lab-scale production of polyhydroxyalkanoate (PHA) with Bacillus megaterium. PHA detection and...

The strain Klebsiella sp. K18 produces the enzyme glucosyltransferase and catalyses the conversion of sucrose to palatinose, an alternative sugar that presents low cariogenicity. Response Surface Methodology was successfully employed to determine the optimal concentration of culture medium components. Maximum glucosyltransferase production (21.78 U mL(-1)) was achieved using the optimized mediu...