587 resultados para Bagasse


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O uso da biomassa como fonte de energia elétrica corresponde a uma alternativa de grande importância para o planejamento estratégico do crescimento econômico de diversos países. A vasta extensão territorial e o clima favorável ao desenvolvimento da agricultura no Brasil trazem como vantagem o poder de planejar sua matriz energética utilizando variadas fontes primárias renováveis. A cana-de-açúcar destaca-se pela rusticidade e grande produtividade. O bagaço como um subproduto resultante do processamento da cana é utilizado como fonte para a cogeração de energia e pode contribuir significativamente para a descentralização das fontes de energia nacional. Com o desenvolvimento da tecnologia de etanol de segunda geração, a busca pela maior produção de biomassa ganha relevância. Os programas de melhoramento identificaram que se caso com redução de 25 a 35% da sacarose na cana, a planta teria um potencial de aumento de mais de 100% da biomassa. Os híbridos derivados de programas de melhoramento da espécie Saccharum spp., direcionados exclusivamente para a produção de biomassa, foram denominados de cana energia. Tendo em vista o potencial de produtividade da cultura e consequentemente de geração de energia, torna-se necessário conhecer se esse potencial se traduz em resultado econômico. Com esse enfoque, o objetivo deste trabalho foi analisar a viabilidade econômica da produção de biomassa da cana energia. Para tanto foi desenvolvido um modelo em planilha eletrônica e o modelo foi empregado na simulação de cenários e alternativas. A planilha integra modelos de balanço hídrico, produtividade da cultura e distribuição de chuvas, e suas relações com aspectos econômicos e produtivos. O preço de venda da biomassa, a produtividade da cultura e a distância de transporte se mostraram como os itens que mais influem sobre os indicadores de viabilidade econômica. Diferentemente da eficiência gerencial, a eficiência de campo corresponde a um fator de grande importância a ser considerado para reduzir o custo de produção. A análise da área de colheita como uma variável crítica indicou que existem módulos ideais para a utilização de máquinas agrícolas, reduzindo o seu custo operacional devido ao uso melhor atribuído das máquinas na propriedade. A análise da textura do solo como variável crítica mostrou que o cultivo da planta em diferentes tipos de solos reflete em diferentes custos operacionais, produtividade potencial e no montante de investimento. O ano de reforma corresponde a um fator crítico para a viabilização da atividade. Para o cenário base, o indicador de atratividade financeira apresenta um Valor Presente Líquido de 6,4 milhões de reais e uma Taxa Interna de Retorno de 15,2%, com um horizonte de 20 anos de produção. As análises de sensibilidade mostram que as variáveis que mais impactam nos indicadores de viabilidade econômica financeira são o preço de venda da biomassa e a produtividade média da lavoura.

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Com este estudo objetivou-se avaliar os níveis de estresse e a qualidade de carne de cordeiros mestiços Santa Inês x Dorper, submetidos a transporte de percurso curto (duas horas) e longo (seis horas) e em dois períodos de espera pré-abate (12 ou 24 horas). Foram utilizados 32 cordeiros com 127 ± 7 dias de idade e 30,4 ± 2,1 kg de peso vivo. Antes de serem submetidos aos períodos de transporte, os animais estavam alocados em baias coletivas e receberam ração concentrada (farelo de soja e milho, calcário calcítico e núcleo com monensina), bagaço úmido de citros e capim Napier (Pennisetum purpureum) e água ad libitum. Foram realizadas avaliações de reatividade dos animais no momento do embarque, desembarque e durante a contenção dos animais para as colheitas de sangue, urina e temperatura ocular por termografia infravermelho. Durante o período de espera pré-abate, realizou-se a colheita de dados comportamentais dos animais. Foram avaliadas as concentrações de cortisol no soro, na urina e as concentrações de haptoglobina no soro nos períodos que antecederam a insensibilização, assim como no momento do abate. Os animais apresentaram baixa reatividade durante todos os manejos. Houve diferença significativa no comportamento dos cordeiros durante os períodos de espera (P < 0,05) que durante as 12 horas apresentaram frequência de comportamentos que indicaram bem-estar favorável, enquanto que o período de transporte não afetou (P > 0,05). Os níveis de cortisol no soro mantiveram-se semelhantes da saída dos animais para o transporte até o final do período de espera (P > 0,05), enquanto houve oscilação dessas concentrações no cortisol na urina (P < 0,05), com pico no desembarque dos animais de duas horas de transporte e diminuição ao final do período de descanso. Os níveis de haptoglobina mantiveram-se semelhantes da colheita realizada antes do transporte, no embarque e no desembarque (P > 0,05) e diminuíram no final do período de espera pré-abate (P < 0,05). A temperatura ocular elevou-se no embarque e no desembarque dos animais, com diminuição da temperatura ao final do período de espera (P < 0,05). No momento do abate, foi observado aumento das concentrações de haptoglobina (P < 0,05), enquanto não houve alteração nas concentrações de cortisol no soro (P > 0,05). Animais que permaneceram por 24 horas de espera pré-abate apresentaram maior força de cisalhamento e menor luminosidade (L*) e intensidade de amarelo (b*). As variáveis comportamentais foram pouco afetadas pelos períodos de transporte e de espera pré-abate, porém o período de 12 horas de espera favoreceu a qualidade da carne

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Este trabalho teve como objetivo geral estudar a viabilidade técnica de utilizar bagaço de cana como meio reativo de barreiras reativas permeáveis (BRP) para remoção de sulfato e metais de águas subterrâneas contaminadas. O estudo baseou-se em investigação experimental, por meio de ensaios laboratoriais de coluna, e em modelagem matemática, para a qual utilizaram-se também alguns dados obtidos em um estudo de caso de uma unidade industrial contaminada com sulfato e metais. Neste local contaminado, as características hidrogeológicas e topográficas propiciam a utilização de uma barreira reativa permeável como técnica de remediação. Barreiras reativas permeáveis são uma alternativa para remediação de águas subterrâneas que vem progredindo rapidamente na última década, a partir de ensaios de bancada e coluna em laboratório para implementação em escala real em campo. Três colunas bióticas foram montadas utilizando bagaço de cana como meio reativo e um material de base poroso constituído de areia e cascalho para fornecer adequada condutividade hidráulica, com a proporção de 1:28 em massa seca. Também foi adicionado ao meio reativo um inóculo bacteriano composto por esterco bovino dissolvido. Uma quarta coluna, sem inóculo e contendo um agente biocida, compôs o experimento branco (abiótico). Uma solução sintética foi introduzida nas colunas simulando condições da água subterrânea do estudo de caso, com velocidade de Darcy em torno de 2,0x10-7 m/s composta por sulfato e metais (zinco e níquel) com concentrações de 6.000 mg/L e 15 mg/L, respectivamente. Os resultados das análises da fase líquida das colunas bióticas apresentaram: (i) média da taxa de remoção de sulfato durante todo o tempo do experimento de 49 mg/L/dia; (ii) as concentrações de Zn e Ni diminuíram de 15 mg/L para valores não detectáveis pela técnica analítica utilizada (< 0,01 mg/L); (iii) aumento do pH de 5.5-5.8 para valores entre 6,8-8,0; (iv) redução do valor do potencial de óxido redução (Eh) para valores de até -200mV. Não foram observadas reduções das concentrações de metais e sulfato na fase líquida da coluna abiótica e os valores de pH e Eh permaneceram dentro das faixas iniciais. Análises nas fases sólidas das colunas bióticas por MEV e EDS após o término do experimento identificaram a presença de Ni, Zn, S e Mn, indicando a precipitação desses metais em forma de sulfetos. Estes elementos não foram detectados na fase sólida da coluna abiótica. Assim, pôde-se inferir que toda a remoção de sulfato verificada nas colunas bióticas pode ser atribuída a redução bacteriana de sulfato. A partir das condições experimentais dos ensaios, foi realizada a modelagem e o dimensionamento da BRP. Para a estimativa da cinética de redução de sulfato, aplicou-se a solução analítica de Van Genuchten para transporte de contaminantes com degradação, obtendo-se uma taxa de decaimento de primeira ordem de 0,01 dia-1. A determinação da espessura e tempo de residência da barreira foi realizada considerando que a concentração de sulfato na saída da barreira fosse menor ou igual a 250 mg/L. O resultado do dimensionamento de uma BRP preenchida com bagaço de cana e areia nas proporções de 1:28 em massa seca resultaria em uma BRP de 7,1 m de espessura, com tempo de residência de 950 dias, no local de estudo de caso. Caso fosse utilizado o dobro da proporção de bagaço de cana e areia em massa seca (1:14), a implantação da BRP apresentar-se-ia viável, com espessura aproximada de 4 m. Através destes resultados, pôde ser comprovada a hipótese de que bagaço de cana como substrato e esterco bovino como inóculo compõem um meio reativo viável para a redução de sulfato e precipitação de metais em uma BRP.

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A digestão anaeróbia é uma alternativa para o tratamento de resíduos com altas concentrações de matéria orgânica. Por meio dos processos anaeróbios é possível a produção de biogás, fonte de energia renovável e ambientalmente amigável. Elevadas concentrações de lipídios, todavia, apesar de representarem elevado potencial metanogênico, interferem negativamente nos sistemas de tratamento, podendo inibir a atividade microbiana e, consequentemente, a produção de metano. O presente projeto avaliou o efeito da adição de bagaço de cana-de-açúcar no processo de biodigestão anaeróbia de elevadas concentrações de gorduras advindas de efluentes de laticínio. Para tanto foi utilizado bagaço de cana-de-açúcar in natura e pré-tratadas pelos seguintes métodos: organossolve, hidrotérmico, explosão à vapor e ácido diluído. O uso desse material lignocelulósico teve o objetivo de controlar a inibição causada pelos produtos da hidrólise dos lipídios por meio de sua adsorção e, consequentemente, diminuição das concentrações de tais compostos no meio. Outra hipótese era que o bagaço de cana-de-açúcar pudessem agir como co-substrato no processo de biodigestão anaeróbia. Inicialmente realizaram-se ensaios de biodegradabilidade anaeróbia com concentrações crescentes de gordura, que resultaram em relação entre substrato e microrganismo 0,06, 0,1, 0,2, 0,4 e 0,6 g DQO/gSTV. O ensaio com concentração em que foi verificada a inibição severa (0,4 gDQO/gSTV) do processo foi repetido com adição das fibras tratadas e não tratadas. Aos dados de produção acumulada de metano ajustou-se modelo de Gompertz, e parâmetros cinéticos foram inferidos. O bagaço de cana-de-açúcar mostrou potencial como adsorvente de gordura, pois as produções metanogênicas foram superiores à condição inibida sem adição desse material. A adição de fibras pré-tratadas por método organossolve resultou nas maiores produções de metano.

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The objective of this work was to dry sewage sludge using a fry-drying process. The frying experiments were carried out in commercial fryers modified by adding thermocouples to the setup. During frying, typical drying curves were obtained and it was verified that, in relation to the parameters: oil temperature, oil type and shape of the sample, the shape factor the most effect on the drying rate, at least within the range chosen for the variables studied. Oil uptake and calorific value were also analyzed. The calorific value of the samples increased with frying time, reaching values around 24MJ/kg after 600s of frying (comparable to biocombustibles such as wood and sugarcane bagasse). The process of immersion frying showed great potential for drying materials, especially sewage sludge, obtaining a product with a high energy content, thereby increasing its value as a combustible.

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There is interest in the use of sugar cane waste biomass for electricity cogeneration, by integrated gasification combined cycle (IGCC) processes. This paper describes one aspect of an overall investigation into the reactivity of cane wastes under pressurized IGGC conditions, for input into process design. There is currently a gap in understanding the morphological transformations experienced by cane waste biomass undergoing conversion to char during pressurized gasification, which is addressed by this work. Char residuals remaining after pressurized pyrolysis and carbon dioxide gasification were analysed by optical microscope, nitrogen (BET) adsorption analysis, SEM/EDS, TEM/EDS and XPS techniques. The amorphous cane plant silica structures were found to remain physically intact during entrained flow gasification, but chemically altered in the presence of other inorganic species. The resulting crystalline silicates were mesoporous (with surface areas of the order of 20 m(2) g(-1)) and contributed to much of the otherwise limited pore volume present in the residual chars. Coke deposition and intimate blending of the carbonaceous and inorganic species was identified. Progressive sintering of the silicates appeared to trap coke deposits in the pore network. As a result ash residuals showed significant organic contents, even after extensive additional oxidation in air. The implications of the findings are that full conversion of cane trash materials under pressurized IGCC conditions may be significantly hampered by the silica structures inherent in these biomass materials and that further research of the contributing phenomena is recommended.

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Thermochemical characterisation of agricultural biomass wastes from West African region has been carried out and their potential use as feedstock in thermochemical conversion processes determined. Proximate, ultimate, structural compositions, calorific values, thermogravimetry (TGA) and derivative thermogravimetry (DTG) analyses were carried out on corn straw and cobs, rice straw and husks, cocoa pod, jatropha curcas and moringa olifiera seed cakes, parinari polyandra fruit shell and sugarcane bagasse. Moringa olifiera seed cakes and cocoa pods were found to contain the highest moisture contents. Rice straw was found to contain a high ash content of 45.76. wt.%. The level of nitrogen and sulphur in all the samples were very low. Rice husk was found to have the highest lignin contents while corn cob low lignin contents indicate a potential feedstock source for quality bio-oil production using thermochemical process. © 2013.

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The aim of this work is to improve some of the less desirable properties of bio-oil via the catalytic fast pyrolysis of sugarcane bagasse using a novel supported molybdenum carbide (20 wt.% MoC/AlO ) catalyst. Proximate and elemental analysis of the bagasse were carried out to determine the moisture, ash, carbon, hydrogen, nitrogen and oxygen content. The ground pellets were classified in sieves to a size range of 0.25-1 mm and were pyrolysed in a 300 g h fluidised bed reactor at 500 C. MoC/AlO replaced the sand in the fluidised bed reactor in different proportions (0 wt.%, 12 wt.%, 25 wt.% and 50 wt.%) to investigate the effect of this catalyst on the pyrolysis products. Bio-oil yield results showed that ground sugarcane bagasse pellets gave high organic yields in the bio-oil of 60.5 wt.% on dry feed with a total liquid yield of 73.1 wt.% on dry feed without catalyst. Increasing the catalyst proportions in the fluidised bed reduced bio-oil yields, significantly reduced sugars (as a-levoglucosan) concentration and increased furanics and phenolics concentration in the bio-oil. It was observed that the higher the concentration of the 20 wt.% MoC/AlO catalyst in the fluidised bed the lower the viscosity of the bio-oil. © 2013 Elsevier B.V. All rights reserved.

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Torrefaction experiments were carried out for three typical South African biomass samples (softwood chips, hardwood chips and sweet sorghum bagasse) to a weight loss of 30wt.%. During torrefaction, moisture, non-structural carbohydrates and hemicelluloses were reduced, resulting in a structurally modified torrefaction product. There was a reduction in the average crystalline diameter (La) (XRD), an increase in the aromatic fraction and a reduction in aliphatics (substituted and unsubstituted) (CPMAS 13C NMR). The decrease in the aliphatic components of the lignocellulosic material under the torrefaction conditions also resulted in a slight ordering of the carbon lattice. The degradation of hemicelluloses and non-structural carbohydrates increased the inclusive surface area of sweet sorghum bagasse, while it did not change significantly for the woody biomasses.

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The sustainable use of waste resulting from the agribusiness is currently the focus of research, especially the sugar cane bagasse (BCA), being the lignocellulosic waste produced in greater volume in the Brazilian agribusiness, where the residual biomass has been applied in production energy and bioproducts. In this paper, pulp was produced in high purity from the (BCA) by pulping soda / anthraquinone and subsequent conversion to cellulose acetate. Commercial cellulose Avicel was used for comparison. The obtained cellulose acetate was homogeneous acetylation reaction by modifying the variables, the reaction time in hours (8, 12, 16, 20 and 24) and temperature in ° C (25 and 50). FTIR spectra showed characteristic bands identical to cellulosic materials, demonstrating the efficiency of separation by pulping. The characterization of cellulose acetate was obtained and by infrared spectroscopy (FTIR), X-ray diffraction (XRD), thermogravimetric analysis (TG / DTG / DSC), scanning electron microscopy (SEM) and determining the degree of substitution (DS ) for the cellulose acetate to confirm the acetylation. The optimal reaction time for obtaining diacetates and triacetates, at both temperatures were 20 and 24 h. Cellulose acetate produced BCA presented GS between 2.57 and 2.7 at 25 ° C and 50 ° C GS obtained were 2.66 and 2.84, indicating the actual conversion of cellulose BCA of di- and triacetates. Comparative mode, commercial cellulose Avicel GS showed 2.78 and 2.76 at 25 ° C and 2.77 to 2.75 at 50 ° C. Data were collected in time of 20 h and 24 h, respectively. The best result was for the synthesis of cellulose acetate obtained from the BCA GS 2.84 to 50 ° C and 24 hours, being classified as cellulose triacetate, which showed superior result to that produced with the commercial ethyl cellulose Avicel, demonstrating converting potential of cellulose derived from a lignocellulosic residue (BCA), low cost, prospects of commercial use of cellulose acetate

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The present study aims to evaluate the potential use of bagasse ash from sugar cane (CBC) as a flux, replacing phyllite and/or feldspar in standard industrial mass production of enameled porcelain, verifying the possibility of the CBC contribute to the overall reduction of the coefficient of thermal expansion of the ceramic mass. To this end, as a result of the research, we characterized the raw material components of the standard mass (clay, phyllite, kaolin, feldspar, quartz and talc) and the residue of BCC, by testing by XRF, XRD, AG, DTA and ATG. Specimens (CDP) were manufactured in the dimensions of 100 mm x 50 mm x 8 mm in uniaxial matrix under compaction pressure of 33 MPa, assembled in batches of 3 units subsequently sintered at temperatures of 1150°C to 1210°C by varying the Rating Scale at 10°C, heating and cooling ramp of 50°C/min and 25°C/min, with levels of 1 min, 3 min, 5 min, 8 min, 10 min, 15 min, 30 min and 60 min. analyzing the results of the physical properties of water absorption (WA), linear firing shrinkage (LFS), dilatometric analysis (DTA), flexural strain (SFT) and SEM of the sintered bodies in order to verify the adequacy of CDP to ISO 13006, ISO 10545, NBR 13816 standards; NBR 13817 and NBR 13818. The study showed that the formulations that best suit the requirements of the standards are:. G4 - which was applied in 10% of replacing the CBC phyllite, sintering temperature 1210 ° C for 10 min and porch, and F3 - with application of 7.5% of CBC to replace the feldspar in the sintering temperatures of 1190°C, 1200°C and 1210°C for 10 min and porch. These formulations showed better performance regarding the formation of primary and secondary mullite, with considerable reduction of cracks and pores, meeting the prerequisites of standards for glazed porcelain. The results shows that the use of the CBC as a flux in the preparation of porcelain mass meets standard parameters for the manufacture of the product, and thereby can reduce environmental impact and the cost of production. Therefore, it is recommended to use this residue in the ceramics industry, due to its industrial, commercial and collaborative viability for sustainability.

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Provide healthier meat to consumers of pig farmers has required an adjustment of nutrition and feed management. Nutrition is a primary factor in defining the qualitative aspects of pork, because through it we can modify the fatty acid profile. The objective of this study was to analyze the effects of adding bran bagasse cashew (FBC) in diets for finishing pigs, on carcass traits and meat quality. 20 crossbred barrows with an average initial weight of 57.93 ± 3.67 kg / BW were used Diets were formulated based on corn and soybean meal containing vegetable oil, commercial core and different levels of inclusion of the bran bagasse cashew ( 0.0, 7.5 % , 15.0 % , 22.5 % and 30.0 % ) . The experimental design was a randomized block with 5 treatments and 4 replications. Quantitative, qualitative, fatty acid profile of the longissimus muscle and fat area parameters were evaluated. It was observed that with the inclusion of FBC, the parameters of carcass yield, backfat thickness, fat area had a negative linear effect relationship and meat / fat positive effect. Regarding the profile of fatty acids in fat area, the content of linoleic fatty acid level of 30 % of FBC was 18.2 % higher ( P < 0.05 ) at the level of 0.0 % and the arachidonic level of 22.5 % was higher than 33.3 % and 37.5 % at levels of 0.0 % and 15.0 % ( FBC ) respectively. It is concluded that finishing pigs may be food diets containing up to 30 % of FBC, improving the quality of housing for lower fat deposition and modification in the fatty acid profile.

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The objective of this study was to evaluate the effects of the use of cashew bagasse bran (CBB) as food ingredient in qualitative feed restriction programs on the carcass traits, meat quality, organs weight and intestinal morphometry of barrows and gilts. Twenty – four crossbred pigs were used (12 barrows and 12 gilts) with an average initial body weight of 57.93 ± 3.67 kg/LW. The experimental designs was in randomized blocks 3x2 factorial arrangement with three level (0%, 15% e 30% CBB), two genders (barrows and gilts) and four repetition. A total of twenty-four instalments. The treatments were composed of basal diet (BD) formulated with corn, soybean meal and commercial base mix for finishing pigs, being containing different levels of CBB. At the end of the trial period the animals were slaughtered for the evaluation of the meat quality, traits carcass, Absolute Weight (AW) and Relative Weight (RW) of the organs and morphometric study of small intestine fragment. The inclusion of (CBB) in the diets did not affect the traits carcass of gilts, but interfered in the traits carcass of the barrow positively, increasing the yield of meat into cold carcass and reducing the thickness of subcutaneous fat, without affecting the fatty acid profile. However, we observed increased weight of organs and partial volume of absortiva mucosa of gilts. In the comparison between sex was observed a greater liver weight (AW) and (RW), and surface density of absortiva mucosa of barrow. The use of CBB was considered as ingredient to be used in programs of qualitative feed restriction for finishing pigs.

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The objective of this study was to evaluate the effects of the use of cashew bagasse bran (CBB) as food ingredient in qualitative feed restriction programs on the carcass traits, meat quality, organs weight and intestinal morphometry of barrows and gilts. Twenty – four crossbred pigs were used (12 barrows and 12 gilts) with an average initial body weight of 57.93 ± 3.67 kg/LW. The experimental designs was in randomized blocks 3x2 factorial arrangement with three level (0%, 15% e 30% CBB), two genders (barrows and gilts) and four repetition. A total of twenty-four instalments. The treatments were composed of basal diet (BD) formulated with corn, soybean meal and commercial base mix for finishing pigs, being containing different levels of CBB. At the end of the trial period the animals were slaughtered for the evaluation of the meat quality, traits carcass, Absolute Weight (AW) and Relative Weight (RW) of the organs and morphometric study of small intestine fragment. The inclusion of (CBB) in the diets did not affect the traits carcass of gilts, but interfered in the traits carcass of the barrow positively, increasing the yield of meat into cold carcass and reducing the thickness of subcutaneous fat, without affecting the fatty acid profile. However, we observed increased weight of organs and partial volume of absortiva mucosa of gilts. In the comparison between sex was observed a greater liver weight (AW) and (RW), and surface density of absortiva mucosa of barrow. The use of CBB was considered as ingredient to be used in programs of qualitative feed restriction for finishing pigs.

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In Brazil many types of bioproducts and agroindustrial waste are generated currently, such as cacashew apple bagasse and coconut husk, for example. The final disposal of these wastes causes serious environmental issues. In this sense, waste lignocellulosic content, as the shell of the coconut is a renewable and abundant raw material in which its use has an increased interest mainly for the 2nd generation ethanol production. The hydrolysis of cellulose to reducing sugars such as glucose and xylose is catalysed by a group of enzymes called cellulases. However, the main bottleneck in the enzymatic hydrolysis of cellulose is the significant deactivation of the enzyme that shows irreversible adsorption mechanism leading to reduction of the cellulose adsorption onto cellulose. Studies have shown that the use of surfactants can modify the surface property of the cellulose therefore minimizing the irreversible binding. The main objective of the present study was to evaluate the influence of chemical and biological surfactants during the hydrolysis of coconut husk which was subjected to two pre-treatment in order to improve the accessibility of the enzymes to the cellulose, removing this way, part of the lignin and hemicellulose present in the structure of the material. The pre-treatments applied to coconut bagasse were: Acid/Alkaline using 0.6M H2SO4 followed by 1M NaOH, and the one with Alkaline Hydrogen Peroxide at a concentration of 7.35% (v/v) and pH 11.5. Both the material no treatment and pretreated were characterized using analysis of diffraction X-ray (XRD), Scanning Electron Microscopy (SEM) and methods established by NREL. The influence of both surfactants, chemical and biological, was used at concentrations below the critical micelle concentration (CMC), and the concentrations equal to the CMC. The application of pre-treatment with coconut residue was efficient for the conversion to glucose, as well as for the production of total reducing sugars, it was possible to observe that the pretreatment fragmented the structure as well as disordered the fibers. Regarding XRD analysis, a significant increase in crystallinity index was observed for pretreated bagasse acid/alkali (51.1%) compared to the no treatment (31.7%), while that for that treated with PHA, the crystallinity index was slightly lower, around 29%. In terms of total reducing sugars it was not possible to observe a significant difference between the hydrolysis carried out without the use of surfactant compared to the addition of Triton and rhamnolipid. However, by observing the conversions achieved during the hydrolysis, it was noted that the best conversion was using the rhamnolipíd for the husk pretreated with acid/alkali, reaching a value of 33%, whereas using Triton the higher conversion was 23.8%. The coconut husk is a residue which can present a high potential to the 2nd generation ethanol production, being the rhamonolipid a very efficient biosurfactant for use as an adjuvant in the enzymatic process in order to act on the material structure reducing its recalcitrance and therefore improving the conditions of access for enzymes to the substrate increasing thus the conversion of cellulose to glucose.