[en] One-phase model have been reported to describing the simultaneous heat and mass transfer in a horizontal drum partially filled by sugarcane bagasse with attention to the loss of water promoted by the increase of temperature. Mass and energy balances were written in MatLab language and solved by finite difference method. Predicted temporal and spatial profiles of moisture content and temperature are shown. Experimental tests were carried out in a horizontal drum and the temporal profiles were obtained. Great adjustments between experimental and predicted data were observed, indicating that the model is able to describe the transport phenomena in this system. (Author)

[en] Published in summary form only

[en] For the first time in Cuba organic samples were analyzed by neutron reflection method. The feasibility of this method to determinate the moisture grade in sugar cane bagasse is fixed. From 0 to 50w% moisture grade with 2-3% relative accuracy can be determinated using 10m. measuring time. 7 refs

No abstract available

[en] Sugarcane bagasse is divided into two major components. They are pith and rind. Pith is the inner part of sugarcane bagasse while rind is the outer part of it. In this study, the flexural properties of pith reinforced poly (vinyl chloride) composites were compared to that of rind composites with the same matrix in variation of fibre content. The composites were produced by compression moulding method. The fibre contents were 10%, 20%, 30%, 40%, and 50% in weight. Three-point bending tests were carried out to measure the flexural properties of the composites. It has been found that, in general, the addition of fibre improved the flexural modulus of the materials. Meanwhile, the rind composites were of superior flexural properties compared to the pith composites.

[en] Background: A study was conducted at the Territorial Sugar Cane Research Station (ETICA) in the mid-eastern Camagüey province, Cuba, to evaluate the effect of cultivar, stump, and planting distance between furrows for green biomass production, based on forage-production criteria. Methods: The plantation was made in February 2016. The experiment was established according to a categorical multifactorial experimental design 33 = 27, combinations on the base design, with two replicas, and 81 observations. Plantation distance between furrows (0.90, 1.20, and 1.50 m), cultivars (C97-366, C99-374, and My5514), and stumps (plant, shoot, and second shoot), were evaluated. The production of green biomass was determined at 12 months of age. A multifactorial variance analysis using Statgraphics Centurion, XV.I, was performed for statistical processing. Results: Statistically significant differences were detected in the interaction of stump with plantation distance between furrows, for the production of green biomass. The sugar cane stump planted at 0.90 m between furrows showed the best productive results, whereas no significant differences were found between cultivars. Conclusions: The genetic potential for green biomass production was corroborated by the new sugar cane forage cultivars C97-366 and C99-374, with values bove 60 t/ha-1, as the average of the three harvests. (author)

[en] Plant-cane stools were labelled with sup(14) CO sub(2), in the field, at Goiana-PE, Brazil, when 3, 7 and 11 months old. Each stool was enclosed in a chamber with sup(14) CO sub(2) for 90 minutes. The sub(14) C photosynthetic were measured in leaves, stalks, roots and soil 24 hours after labelling. Roots were divided into alive and dead and soil into rhizosphere and outer soil. At the end of the labelling period at 3, 7 and 11 months, 2, 19 and 1% of the initial sup(14) CO sub(2) were recovered in the plant and the soil. The low recovery of sub(14) C at 3 months could be attribute to losses by respiration and lack of sampling of the top growing point. The low CO sub(2) fixation and losses at first sampling in the 7 month old labelling were attributed to low light intensity during the day of labelling. Most of the recovered sub(14) C (>80%) was founded in the leaves but all plant parts received labelled photosynthetic. At 3 months, most of the sub(14) C translocated from the leaves went to the living roots (83%); at 7 and 11 months it went to the stalks (69 and 66%). While the roots received less than 2%. Root masses did not vary consistently along the plant cycle and dead root masses were always less than 10% of the total root mass. Radioactivity in the dead roots was always very low. These results suggest that the root system have a low turnover rate after 3 months old. (author)

No abstract available

[en] Introduction: The shortage of fossil fuels implies the new sources of energy to replace it search. The bagasse generated from sugar cane contains lignocellulosic residues from which fuel bioethanol can be obtained by enzymatic hydrolysis. Objective: This work aims to design the process for obtaining fuel bioethanol by enzymatic hydrolysis of sugarcane bagasse using the SuperPro Designer software. Materials and Methods: A sequential procedure was used which covers all the aspects that must be considered for the optimal design of an industrial plant. The SuperPro Designer V. 10.0 program was used for the process design and simulation. Continuous operation mode was defined (Annual operation of 7.920 hours, 24 hours in 330 days). Results and Discussion: The quantities of cane bagasse with the most profitable economic indicators are 72 t, 90 t, 108 t, 126 t, and 144 t of cane bagasse and an internal rate of return between 9.14% for 72 t to 31.33% in 144 t of bagasse. Quantities less than 54 t of sugarcane bagasse report a negative net present value. Therefore, these quantities not generate profitable processes. Conclusions: The economic indicators with the highest profitability are between 64 t to 144 t of sugarcane bagasse.

[en] The determination of Ca, Cu, Fe and Pb in sugarcane raw spirits by atomic absorption spectrophotometry was carried out. For 20 μL injected sample, calibration within the 0,5-25,0 mg. L^-1 Ca; 0,25-5,0 mg. L^-1 Cu, Pb and Cu intervals were established using the ratios Cu, Ca, Fe and Pb absorbance versus analyte concentration, respectively. Typical linear correlations of r = 0,999 were obtained. The proposed method was applied for the direct determination of Ca, Cu, Fe and Pb in sugar cane spirits, and in samples. The results obtained were in accordance to those obtained at 95% confidence level