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  • Open Access

    ARTICLE

    Biorefinery of Rice Husk to Obtain Functionalized Bioactive Compounds

    M. Lopretti1,*#, N. Lecot1,2,#, A. Rodriguez3, G. Lluberas1, F. Orozco4, L. Bolaños4, G. Montes De Oca4, H. Cerecetto2, J. Vega-Baudrit4,5

    Journal of Renewable Materials, Vol.7, No.4, pp. 313-324, 2019, DOI:10.32604/jrm.2019.00008

    Abstract The biomass industrialization valorisation of grains and cereals is considered an opportunity for the countries where agro-industrial activity is one of its main economic activities, rendering new higher-value products with a concomitant solution to waste accumulation issues. To that end, in this work we describe and characterise bioactive compounds generation from rice husk by semi-solid fermentation, obtained from 500 g of the material at room temperature and 60% humidity with mixed cultures of Phanerochaete chrysosporium and Gloeophyllum trabeum. The extract was evaluated in different situations: murine mammary tumour cells (4T1), normal cells (NIH 3T3) and More >

  • Open Access

    ARTICLE

    Enzymatic Conversion of Sugarcane Lignocellulosic Biomass as a Platform for the Production of Ethanol, Enzymes and Nanocellulose

    Cristiane S. Farinas*, José Manoel Marconcini, Luiz Henrique C. Mattoso

    Journal of Renewable Materials, Vol.6, No.2, pp. 203-216, 2018, DOI:10.7569/JRM.2017.6341578

    Abstract The conversion of sugarcane lignocellulosic biomass into fuels, chemicals and high-value materials using the biochemical pathway is considered the most sustainable alternative for the implementation of future biorefineries. Actually, the first large-scale cellulosic ethanol plants that have started operating worldwide apply the enzymatic hydrolysis process to convert biomass into simple sugars that are fermented to ethanol by yeasts. However, several technological challenges still need to be addressed in order to obtain commercially competitive products. This review describes current challenges and perspectives regarding the enzymatic hydrolysis step for processing sugarcane lignocellulosic biomass within the biorefinery. Recent More >

  • Open Access

    ARTICLE

    Microfibrillated Cellulose from Sugarcane Bagasse as a Biorefinery Product for Ethanol Production

    Rafael Grande1*, Eliane Trovatti2, Maria Tereza B. Pimenta3, Antonio J. F. Carvalho1

    Journal of Renewable Materials, Vol.6, No.2, pp. 195-202, 2018, DOI:10.7569/JRM.2018.634109

    Abstract Research involving the preparation of microfibrillated cellulose (MFC) from sugarcane bagasse is a relevant topic to the production of new nanomaterials and more accessible cellulose substrates for the production of second generation ethanol. Regarding the transformation of cellulose into glucose, the precursor of second generation ethanol, this nanosized cellulosic substrate represents a more appropriate material for the chemical hydrolysis process. The high aspect ratio of MFC improves hydrolysis, requiring mild conditions and decreasing the generation of by-products. Here, MFC was prepared from sugarcane bagasse by ultrasound defibrillation. This material was oxidized with 2,2,6,6-tetramethylpiperidine-N-oxyl (TEMPO) to More >

  • Open Access

    ARTICLE

    Alternatives of Small-Scale Biorefineries for the Integrated Production of Xylitol from Sugarcane Bagasse

    Nicolás M. Clauser1*, Soledad Gutiérrez2, María C. Area1, Fernando E. Felissia1, María E. Vallejos1

    Journal of Renewable Materials, Vol.6, No.2, pp. 139-151, 2018, DOI:10.7569/JRM.2017.634145

    Abstract Small-scale biorefinery from sugarcane bagasse offers new possibilities to the sugar and ethanol industries. The aim of this study was to evaluate the feasibility of a small-scale biorefinery for the production of xylitol from sugarcane bagasse. The liquid fraction from the autohydrolysis treatment was selected as the source of sugars for xylitol and two scenarios were analyzed for the residual solid: ethanol or pellet production. A technical-economic analysis of alternatives was applied. The internal rate of return (IRR) was used to compare the selected proposals. The highest IRR values were obtained when processing 70,000 dry More >

  • Open Access

    ARTICLE

    Biodegradation Pretreatment of Wood of E. grandis, E. dunnii, and E. benthamii to Work in Biorefi nery Processes

    Mary Isabel Lopretti1,2*, Natalia Irene Baldyga3, Maria Gonzalez1, Laura Beatriz Olazabal3, Marina Graciela Torres3, Fernando Resquin4, Leonidas Carrasco4

    Journal of Renewable Materials, Vol.4, No.1, pp. 66-71, 2016, DOI:10.7569/JRM.2015.634133

    Abstract Nowadays, there is a great interest in using lignocellulosic materials as substrate for the production of biorefi nery products. Eucalypti are good options to use as crops to obtain different kinds of biofuels and derivatives, since their plantations show high adaptation potential to soil and weather conditions in Uruguay. The basic process steps involved in the obtainment of biorefi nery materials are: pretreatment, hydrolysis, fermentation and products separation. As delignifi cation is an important process to obtain biorefi nery products, in this context the evaluation of the biological (BT) and hydrothermal (TT) pretreatment of different More >

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