Molasses as a by-Product of Sugar Crystallization and a Perspective Raw Material (original) (raw)
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Steady state modeling and simulation of an industrial sugar continuous crystallizer
Computers & Chemical Engineering, 2001
The profile of supersaturation along a continuous crystallizer of sugar factories, is the decisive factor that determines the performance of this apparatus. In order to control this profile, a mathematical model was developed taking into account the main physicochemical phenomena involved in crystallization process. The model is based on flow pattern, which was assumed and validated against plant measurements using a tracer test. The steady state mathematical model developed describes the most important aspects of the crystallizer behavior in each compartment: supersaturation, crystal size distribution and flow rate of the product crystals. The model can also describe the undesirable behavior such as dissolution and nucleation. Validation of the developed model was performed using industrial data. A parametric sensitivity study confirmed that the syrup supply distribution is the main variable that should be manipulated to achieve good performance for the crystallizer.
– Ethanol is a renewable resource of energy and is potentially cleaner alternative to fossil fuels. Production of ethanol is growing day by day at a great extent for its versatile application and demand. During recent years, production of ethanol by fermentation on a large scale has been of considerable interest to meet to increased demand. Fermentation is a biological process in which sugars such as glucose, fructose, and sucrose are converted into cellular energy and thereby produce ethanol and carbon dioxide as metabolic waste products. It has long been recognized that molasses from sugar-cane or sugar provide suitable substrates for ethanol production. Production of ethanol by fermentation of molasses is simulated by Simulation software Aspen Hysys 7.1 to investigate the effect of few important parameters like fermentation temperature, pressure that effect the production of ethanol and to optimize those parameters. The present investigation has demonstrated the trend of changing production by changing of those parameters.
Simulation of Ethanol Production by Fermentation of Molasses
Ethanol is a renewable resource of energy and is potentially cleaner alternative to fossil fuels. Production of ethanol is growing day by day at a great extent for its versatile application and demand. During recent years, production of ethanol by fermentation on a large scale has been of considerable interest to meet to increased demand. Fermentation is a biological process in which sugars such as glucose, fructose, and sucrose are converted into cellular energy and thereby produce ethanol and carbon dioxide as metabolic waste products. It has long been recognized that molasses from sugar-cane or sugar provide suitable substrates for ethanol production. Production of ethanol by fermentation of molasses is simulated by Simulation software Aspen Hysys 7.1 to investigate the effect of few important parameters like fermentation temperature, pressure that effect the production of ethanol and to optimize those parameters. The present investigation has demonstrated the trend of changing production by changing of those parameters.
MINIMIZATION OF SUCROSE LOSSES IN SUGAR INDUSTRY BY pH AND TEMPERATURE OPTIMIZATION
2008
Invert sugar has several disadvantage properties that play an important role in many food applications. It has a high affinity for water and is the cause of making products retain moisture.Invert sugar also affects the caramelization process , producing a browning effect. In this study, the possibility of minimization of sucrose inversion during the industrial production of sugar cane was investigated by the variation of the important parameters, i.e. temperature and pH of sugar cane juice for each of samples. The amounts of sucrose and reducing sugar alerting during the sucrose inversion process were determined by the values of % Pol and % reducing sugar (% RS), respectively. Starting with the study of temperature and pH effects of the sucrose solution with the concentration of 16 Brix, used as a sample model, it was found that no change in amounts of reducing sugar and sucrose was observed at room temperature (34 o C) in the pH range of 5-11. At pH 3, the amounts of reducing sugar...
Simplified modeling of fed-batch alcoholic fermentation of sugarcane blackstrap molasses
Biotechnology and Bioengineering, 2003
Simplified modeling based on material balances for biomass, ethanol and substrate was used to describe the kinetics of fed-batch alcohol fermentation of sugarcane blackstrap molasses. Maintenance requirements were previously shown to be of particular significance in this system, owing to the use of massive inoculum to minimize inhibitions; therefore, they were taken into consideration for kinetic modeling. Average values of biomass and ethanol yields, productivities, and substrate consumption rates, calculated at the end of runs performed either at constant or exponentially varying flow rates, demonstrated that all of these parameters were influenced by the initial sugar-feeding rate, F o S o . Under conditions of substrate shortage (F o S o Յ 300 g S h −1 ), the amount of carbon dioxide produced was higher than that corresponding to the stoichiometry of sucrose fermentation to ethanol, indicating that an appreciable fraction of the carbon source was likely consumed by respiration. Besides, the biomass yields either on substrate, Y X/S , or ethanol, Y X/E , as well as the product yield on substrate, Y E/S , notably decreased. These results are in agreement with the relatively high specific rate of anaerobic substrate consumption for maintenance estimated for this system (m a s = 0.789 g S g X −1 h −1 ), which was responsible for the consumption of more than 70% of the fed carbon source. The proposed equations derived from the Monod model proved to be a useful tool to easily predict the performance of this process.
Production of Ethanol from Sugarcane Molasses
International Journal For Research in Applied Sciences and Biotechnology
Ethanol is a potential energy source and its production from renewable biomass has gained lot of popularity. There has been worldwide research to produce ethanol from regional inexpensive substrates. The present study deals with the optimization of process parameters (viz Ph, Substrate conc, Urea conc) for ethanol production from sugar cane molasses. Sugar cane molasses are cheapest source of ethanol production it can also produce from wheat, sugar beet and corn etc. The study was carried out by process of parameter optimization. The process parameters optimized were substrate conc, pH and urea conc. The values of the process parameters are 30% substrate conc, pH 4.5 and urea conc 0.5%. Fermentation period was 7 to 8 days at 28°C.
2007
The present study analyzes the influence of modification of sugar crystallization from three to two stages and tried to optimize both sugar and ethanol production from sugar cane source. The efficiency of sugar crystallization process was determined by simulation at Wonji Shoa Sugar Factory (WSSF). Economical advantages in optimizing the sugar and ethanol productions were compared with the factory's existing working norms. Batch fermentation of molasses samples using saccharomyces cerevisiae was carried out at fermentation temperature of 30 (+1) o C, pH of 5.5 (+ 0.1) and ammonia supplement of 2 g/L in Erlenmeyer flask of 250 mL. The parameters varied were total sugar as invert (TSAI) in the fermentation broth of prepared molasses from both two and three crystallization stages and the amount of dry yeast in the inoculums (1,3,5 g/L). The measured values were concentration of the produced alcohol and the residual sugar. From the obtained data of alcohol concentration and residual...
Energy Recovery from byproduct of sugar cane processing plant: Review Articles
The energy crisis necessitates studying and discovering new processes involved in the production of utilizable compounds as alternative energy sources among which fermentation to ethanol represents a significant strategy. The aim of this material was to assist processors to understand and apply the energy generation from sugar processing plant by products; to address that, there exists an increased unit production cost of sugar unless otherwise simultaneous production of diversified products stipulated from the same sugar cane source and the redetermination of the initial sugar concentration and amount of yeast to optimize the molasses medium. Sugarcane resource can be used to produce a variety of commercial products that can be marketed domestically, regionally and internationally. In economic and environmental terms, the three products that have special significance area sugar, ethanol, and electricity. Ethiopia through its potential in developing large sugarcane production can play a pro-active role in mitigating the same. Molasses the non-crystallizable residue remaining after crystallizing sucrose, has additional advantage; it is relatively inexpensive raw material, readily available and already in use for industrial ethanol production. Along with sugar production, diversification was considered to include ethanol production and electric cogenerations.