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Integrated Production of Ethanol from Starch and Sucrose
Published in Ayerim Y. Hernández Almanza, Nagamani Balagurusamy, Héctor Ruiz Leza, Cristóbal N. Aguilar, Bioethanol, 2023
C. A. Prado, S. Sánchez-Muñoz, R. T. Terán-Hilares, L. T. Carvalho, L. G. De Arruda, M. L. Silva da Cunha, P. Abdeshahian, S. S. Da Silva, N. Balagurusamy, J. C. Santos
The production of sugar within the biorefinery follows common lines for the production of ethanol. In this approach, the concentration of the treated juice is adjusted so that heated processes of evaporation of the broth, crystallization, and drying of the sugars occur (humidity between 0.5 and 2%) [52, 205]. Molasses obtained after crystallization can be used to produce ethanol. In the energy cogeneration system, bagasse (for mechanized harvests) is burned in a boiler and produced steam is driven to turbines, which in turn are connected to electric generators [49, 54]. Thus, a part of the generated electricity can be sold to distributing companies, and the exhausted steam can also be used in various operations at process units that require thermal energy [23, 55, 56, 208].
From Sugarcane to Bioethanol
Published in Subhas K. Sikdar, Frank Princiotta, Advances in Carbon Management Technologies, 2021
R.J. Daroda, V.S. Cunha, H.S. Brandi
The process to produce bioethanol from sugarcane is simpler than from corn, since it follows the sugar production sequence. The sugarcane is cut into small pieces through pickles and shredders and sent to the mill in order to obtain the highest possible yield in broth—a solution containing the sugars. Bagasse, which is also obtained as a residue of the process, is sent to the boilers and used to produce steam for the electricity-generating turbine. The broth goes through a purification processes via chemical treatment and a set of filtrations before is used to produce either sugar or bioethanol. Then, the purified broth can follow two different processes. First, the process for sugar production through broth concentration by water evaporation followed by crystallization. Second is the bioethanol production where the broth is submitted to a fermentation process, producing a water-ethanol solution which is sent to the distillation towers in order to obtain the hydrated bioethanol. The anhydrous bioethanol is obtained by adding a dehydration step (de Azevedo, 2012; Andrietta, 2006).
First-generation biofuel and second-generation biofuel feedstocks
Published in Ruben Michael Ceballos, Bioethanol and Natural Resources, 2017
Bagasse is the residual fibrous material that remains after juice is extracted from sugarcane stalk. Bagasse is rich in cellulose, hemicellulose, and lignin. Cellulose content of bagasse varies widely but typically ranges from 25% to 45% of total dry weight (Menon and Rao, 2012; Paulová et al., 2013). Percent composition of hemicellulose in bagasse is similar to what is found in corn stover. However, lignin content in bagasse is higher (on average) than what is present in corn stover. The moderately high lignin content in bagasse is the factor that makes it a challenging feedstock for bioethanol production. As bagasse has no food value, it does not directly contribute to the food-versus-fuel dilemma and may be used as a high-yield feedstock for ethanol production. However, current industrial trends exploit the availability of bagasse to produce heat and steam via combustion for evaporating water during the crystallization process of sugar production and to distill the ethanol (Siddhartha Bhatt and Rajkumar, 2001).
Mechanical evaluation and characterization of hybrid sugarcane bagasse microfibrillated cellulose with added filler materials for use as disposable utensils
Published in Advanced Composite Materials, 2023
Ari Wibowo, Daffa Alandro, Manuela S. Killian, Gesang Nugroho, Swathi N. V. Raghu, Muhammad Akhsin Muflikhun
Around the world, sugarcane is harvested, with sugarcane bagasse (SCB) being an agro-industrial byproduct obtained after sugarcane juice was extracted to make sugar. The main components of SCB are cellulose, hemicellulose, and lignin, with cellulose accounting for between 40% and 50% of its weight [24]. Bagasse is the fibrous residue left over after sugarcane is crushed to extract the juice. Around sugar-producing operations, improper disposal of this waste might cause environmental problems [25]. Several variables, including plant type, soil composition, crop management, burning conditions, and the presence of contaminants like soil, can affect the chemical composition of sugarcane bagasse [26]. Nanocellulose has attracted a lot of attention from the scientific community, due of its intriguing features. Depending on the isolation procedure, microfibrillated cellulose (MFC) or cellulose microfibrils (CMF) and cellulose nanocrystals can be isolated from vegetal fibers. The intriguing characteristics of microfibrillated cellulose, including its biodegradability, high aspect ratio, and specific surface area, have led to substantial research [27].
Sugarcane processing by-products for bioethanol production in the Philippines: a retrospective assessment from 2007 to 2017 and future challenges
Published in Biofuels, 2022
Alchris Woo Go, Ian Dominic F. Tabañag, Yi-Hsu Ju, Angelique T. Conag, Arjay S. Toledo, John Wilbert A. Orilla, Artik Elisa Angkawijaya
Based on the awarded capacities, at least 48 percent (447.1 MW) of the biomass-based power generation plants are fueled with sugarcane bagasse, with 26% still under construction. If all the awarded sugarcane bagasse-fired power plants are to be continuously operated, a potential electrical power of as much as 3.9 TWh for a given year. With sugarcane bagasse having a higher heating value of 17.88 ± 0.48 MJ/kg (95% CI, n = 10, SD = 0.67 MJ/kg [48–55]) in dry basis, and having 3.2 ± 1.1 Mt of dry bagasse produced each year, the total plant capacity that could be fueled by the available sugarcane bagasse would be as much as 653.2 MW or 5.7 TWh for a given year, assuming that the overall plant efficiency for typically power generation plant is at 36% and operates for 365 days. Although the locally produced sugarcane bagasse would be able to meet the needed fuel for electricity and heat generation, it would also mean that at least 68% of the available bagasse would be consumed for power generation instead of bioethanol production. If multi-feedstock co-generation plants in the Visayas region are to be accounted, considering that sugarcane is largely produced in the region, an additional 57.5 MW capacity (0.5 TWh of electrical power) would need to be served, which would translate to at least 77% of the available sugarcane bagasse used as solid fuel rather than as feedstock for bioethanol production.
Industrial symbiosis: Impact of competition on firms’ willingness to implement
Published in IISE Transactions, 2021
Yunxia Zhu, Milind Dawande, Nagesh Gavirneni, Vaidyanathan Jayaraman
Traditionally, bagasse has been used as an important fuel input in the sugar industry and can meet the requirement of fuel for the industry. Since alternative fuels such as coal or furnace oil are relatively costly, the sugar industry has been reluctant to sell the bagasse to the paper industry. Not surprisingly, following the steep increase in the prices of furnace oil and coal over the years, SPB was unable to make any arrangement to obtain a regular supply of bagasse from the sugar industry. The company also faces several environmental challenges. In addition to the emission of non-condensible gases, a paper mill also releases chlorinated compounds, dioxins, and furans. The waste water (effluent) carries high levels of Biochemical Oxygen Demand, Chemical Oxygen Demand, and other suspended solids. Furthermore, the problem of solid waste disposal is also a major concern in the face of local environmental pressures.