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[en] Sugarcane bagasse was characterized by thermogravimetric analysis (TGA) with the different heating rates, and nitrogen carrier from 30 to 800℃. Through decreasing the sample's mass by temperature, the stage of thermal decomposition could be determined. Specifically, there were three stages of decomposition including moisture escape stage, decomposition of cellulose stage, hemicellulose and lignin decomposition stage. On the other hand, based on the results of TGA the activation energy of decomposition process was determined by the inverse of the Flynn-Wall-Ozawa (FWO) method and Kissinger-Akahira-Sunose (KAS) method. The calculated results were compared with the activation energy by the Coats-Redfern method and Criado method in order to find the kinetics of bagasse pyrolysis process. Accordingly, when the conversion of reaction was lower than 75 %, corresponding to the decomposing process of hemicellulose and cellulose, the thermal decomposing process of bagasse obeyed diffusion kinetics of model D2, D3 and D4. (author)
[en] The paper industry is one of the largest consumers of energy and energy consumption has been increased several times in last few decades. Bagasse chemical pulping has very low yield about 45–55% and also generates high pollution load in the effluent as compared to mechanical pulping, g. Thermo-mechanical pulp (TMP). On the other hand,->e.g. thermo-mechanical pulp (TMP). On the other hand, the specific energy consumption is very high for TMP pulps. ETMP (Energy efficient Thermo-Mechanical Pulping) or ECTMP (Energy efficient Chemi-Thermo Mechanical Pulping) is an innovative idea for reducing the energy demand in TMP refining. In the present investigation, energy efficient mechanical pulping potential of bagasse was studied using TMP, CTMP and ECTMP pulping methodology with electron irradiation pretreatment. It is evident from the results that more than 50% energy saving potential of irradiation pre-treatment was achieved. - Highlights: • The energy savings potential of bagasse chemi-mechanical pulp after irradiation pretreatment was studied. • The effects of high energy electron irradiation pre-treatment on bagasse were determined. • Irradiation pretreatment has the potential for reducing specific energy consumption. • More than 50% energy saving potential of bagasse after irradiation pre-treatment was achieved.
[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] The objective of this study was to determine endogenous phosphorus excretion in sheep fed with different diets. Sixteen male growing sheep, received a basic diet with: 42% hydrolyzed sugarcane bagasse (HSB), 45% lucerne hay (LH) plus 14% hydrolyzed sugarcane bagasse, and 30% citrus pulp (CTP) plus 40% hydrolyzed sugarcane bagasse. A dose of 7.7 MBq 32P was injected into the left jugular vein of each animal. The P endogenous fecal losses were: 1.69, 2.50, 2.33 and 1.45 g/animal for treatments HSB, LH, and CTP respectively (P>0.05). The type of diet influenced slight endogenous P excretion but altered excretion of P in urine. Endogenous P excreted in feces (PF) comes mainly from saliva and represents an important loss of P. The estimation of net requirements of phosphorus (P) for ruminants includes endogenous losses, which is also essential for calculating true absorption of this mineral. Physical structure of the feed may influence endogenous losses, altering the metabolism of P and also the demand of this mineral, therefore being important to know how different feeds affect endogenous P losses. (author)
[en] Semi-solid state fermentation route of hydrogen production from agro-waste sugar cane bagasse was tried using the photosynthetic bacterium Rhodopseudomonas (BHU strain-1) and the non-photosynthetic Enterobacter aerogenes MTCC2822. The process seems an alternative to submerged fermentation that requires high volumes of nutrient broth. Bagasse (10 g) pre-hydrolyzed with NaOH (2%, w/v) was coated with Ca-alginate (1.5%, v/v) containing Rhodopseudomonas and E. aerogenes in the co-immobilized state (300 μg bacterial biomass ml-1). The fermenting medium was just 150 ml to sustain the moistened bagasse in a 0.5 L fermenter kept in light. A parallel set of free bacterial cells served as control. Hydrogen production by the immobilized sets reached 30 L within 60 h with the average rate of 0.177 L H2 h-1. For free cells, the values for hydrogen output (20 L) or the rate 0.1125 L H2 h-1 were approximately 1.5-fold low. It is proposed that semi-solid fermentation route of hydrogen production from bagasse will be a cost-effective technology in countries generating this agro-waste. (authors)
[en] Bagasse is a waste product which was produced from the sugar industry. These wastes produce lots of environment pollution in development. Effective utilization of these wastes can reduce lots of environment pollution. In this study, a literature review is carried out to observe the bagasse as reinforcement in the development of composite. From the literature, it was notified that bagasse can be used in the development of composite. (paper)
[en] Biomass densification has encouraged significant interest around the world as a technique for utilization of agro and forest residues as an energy source, and pellets/briquettes production has grown rapidly in last few years. The cutting process is one of the most important steps for biomass preparation prior densification. This stage helps to homogenize the raw material and therefore facilitate handling, feeding and filling in the briquetting equipment. The aim of this work was to study the behavior of sugarcane bagasse submitted to cutting, as a function of its moisture content, angle of the blade edge and cutting speed. The specific cutting energy and peak cutting force were measure using an experimental facility developed for this series of experiments. An analysis of the results of the full factorial experimental design using a statistical analysis of variance (ANOVA) was performed. The response surfaces and empirical models for the specific cutting energy and peak cutting force were obtained using statistical analysis system software. Low angle of the blade edge and low moisture content are, in this order, the most important experimental factors in determining a low specific cutting energy and a low peak cutting force respectively. The best cutting conditions are achieved for an angle of blade edge of 20.8° and a moisture content of 10% w. b. The results of this work could contribute to the optimal design of sugarcane bagasse pre-treatment systems. (full text)
[en] This research focuses on demonstrating the use of the process of analytical hierarchy (AHP) and the MCDA technique to address the problem that exists in our country of the non-existence of current methodologies that incorporate ecological economy indicators for the evaluation of sustainability in the Harnessing the cane biomass. The judgments issued on the pairwise comparisons for the combustion of the biomass sources studied with respect to each criterion and sub-criterion. The results obtained from the AHP analysis show that the emergence and exergy criteria are considered as the most important factors for the evaluation of biomass sustainability, with a PVE of 0.539 and 0.297 respectively, followed by the energy analysis (PVE = 0.164). Based on these preference criteria for the evaluation of the potential of sugarcane biomass, it can be verified that the most suitable alternative for the conversion of biomass into energy is the combustion of bagasse, followed by the combustion of bagasse-AHR. (author)
[en] In the present study, thermogravimetric analysis was used for investigation a bagasse pyrolysis. Multi-period models were applied for evaluation of kinetics parameter based on the TG curve. The decomposition bagasse process was undergone four periods via the breakdown of each different chemical component in a sample. The dehydration occurred below 170℃; hemicellulose primarily and cellulose partially decomposed in a range of 170 to 318℃ and cellulose continuously decomposed from 318 to 400 ℃. The temperature range of 400-700℃ for the last period showed the evidence of lignin decomposition. The study also identified activation energy constant (Ea), the pre-exponential factor (A) and reaction order (n) for each period of pyrolysis process. The dependence of the breakdown of the specific chemical bond on the pyrolysis temperature was also proven by FTIR spectrum analysis. (author)
[en] Natural fibrous materials contain a variety of natural oils or resinous compounds which partly retard the copolymerization of impregnated fibrous materials. Impregnation and gamma irradiation techniques are discussed with particular reference to bamboo and bagasse. (author)