Bioconversion of Sugarcane Biomass into Ethanol: An Overview about Composition, Pretreatment Methods, Detoxification of Hydrolysates, Enzymatic Saccharification, and Ethanol Fermentation

Canilha, Larissa; Chandel, Anuj K.; Milessi, Thais S.; Antunes, Felipe Antônio Fernandes; Freitas, Wagner Luiz da Costa; Felipe, Maria das Graças de Almeida; Silva, Sílvio Silvério da

doi:10.1155/2012/989572

Cited by 469 publications

(345 citation statements)

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“…Production of fuel ethanol from lignocellulosic biomass so called secondgeneration (2G) ethanol is an important necessity due to the heavy usage of gasoline worldwide and environmental pollution. The 2G ethanol is completely renewable and is able to reduce atmospheric pollution due to the lower release of carbon dioxide, while offering several geo-political benefits [3]. Sugarcane bagasse (SB), a fibrous product after extraction of juice is an excellent carbohydrate source (*67 %) for 2G ethanol production [3].…”

Section: Introductionmentioning

confidence: 99%

“…The pretreatment of SB is an inevitable step to increase the accessibility of carbohydrate fraction towards enzymatic action [3]. Dilute acid hydrolysis of lignocellulosics is a fast and effective process but, it has bottlenecks, such as, by-product formation and non-selectivity [5].…”

Section: Introductionmentioning

confidence: 99%

“…Dilute sulfuric acid pretreatment precisely acts on hemicellulose releasing hemicellulosic monomers and releasing some undesired compounds like furans (5-hydroxymethylfurfural and hydroxymethylfurfural), phenolics, weak acids, and others. The dilute acid pretreatment is conducted at high temperature and pressure, and the reaction time takes for seconds or minutes [3]. Sulfuric acid (H 2 SO 4 ) is mostly used catalyst, but other weak acids, such as: hydrochloric acid (HCl) and nitric acid (HNO 3 ) have also been used for the hemicellulose removal from variety of lignocellulosic materials [6].…”

Section: Introductionmentioning

confidence: 99%

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Screening of Yeasts for Selection of Potential Strains and Their Utilization for In Situ Microbial Detoxification (ISMD) of Sugarcane Bagasse Hemicellulosic Hydrolysate

et al. 2016

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Many toxic compounds are produced and released in the hemicellulosic hydrolyzates during the acid pretreatment step, which are required for the disruption of the lignocelluloses matrix and sugars release. The conventional methods of detoxification i.e. overliming, activated charcoal, ion exchange or even membrane-based separations have the limitations in removal of these toxic inhibitors in fermentation process. Hence, it is imperative to explore biological methods to overcome the inhibitors by minimizing the filtration steps, sugar loss and chemical additions. In the present study we screened sixty-four strains of yeasts to select potential strains for detoxification of furfural, acetic acid, ferulic acid, 5-hydroxymethyl furfural (5-HMF) as carbon and energy source. Among these strains Pichia occidentalis M1, Y1 0 a, Y1 0 b and Y3 0 showed a significant decrease in the toxic compounds but we selected two best yeast strains i.e. P. occidentalis Y1 0 a and P. occidentalis M1 for the further experiments with an aim to remove the fermentation inhibitors. The yeasts P. occidentalis Y1 0 a and P. occidentalis M1 were grown aerobically in sugarcane bagasse hemicellulose hydrolysate under submerged cultivation. For each yeast, a 2 2 full factorial design was performed considering the variables-pH (4.0 or 5.0) and agitation rate (100 or 300 rpm), and the percentage removal of HMF, furfural, acetic acid and phenols from hemicellulosic hydrolysates were responsive variables. After 96 h of biological treatment, P. occidentalis M1 and P. occidentalis Y1 0 a showed 42.89 and 46.04 % cumulative removal of inhibitors, respectively.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Screening of Yeasts for Selection of Potential Strains and Their Utilization for In Situ Microbial Detoxification (ISMD) of Sugarcane Bagasse Hemicellulosic Hydrolysate

et al. 2016

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“…This implies not only the glucose obtained from the cellulose, but also the sugars released from the hemicellulose (Díaz et al, 2009). The dilute-acid hydrolysis pre-treatment is commonly used to separate hemicellulose and the resulting hemicellulosic hydrolysate can also be fermented to produce ethanol (Canilha et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Valorization of sunflower meal through the production of ethanol from the hemicellulosic fraction

Tavares

Sene

Christ

2016

Rev. bras. eng. agríc. ambient.

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A B S T R A C TSunflower is among the major oil seeds crop grown in the world and the by-products generated during the seeds processing represent an attractive source of lignocellulosic biomass for bioprocesses. The conversion of lignocellulosic fibers into fermentable sugars has been considered as a promising alternative to increase the demand for ethanol. The present study aimed to establish the fermentation conditions for ethanol production by Scheffersomyces stipitis ATCC 58376 in sunflower meal hemicellulosic hydrolysate, through a 2 3 CCRD (Central Composite Rotational Design) factorial design. Under the selected conditions (pH 5.25, 29 ºC and 198 rpm) the final ethanol concentration was 13.92 g L -1 and the ethanol yield was 0.49 g g -1 .Valorização do farelo de girassol através da produção de etanol a partir da fração hemicelulósica R E S U M O O girassol está entre as principais oleaginosas cultivadas no mundo e os subprodutos gerados durante o processamento das sementes representam uma fonte atraente de biomassa lignocelulósica para bioprocessos. A conversão de fibras lignocelulósicas em açúcares fermentáveis tem sido considerada uma alternativa promissora para aumentar a demanda de etanol. O presente estudo teve, como objetivo, estabelecer as condições de fermentação para a produção de etanol por Scheffersomyces stipitis ATCC 58376 em hidrolisado hemicelulósico de farelo de girassol através de um planejamento fatorial DCCR 2 3 . Sob as condições selecionadas (pH 5,25, 29 ºC e 198 rpm) a concentração final de etanol foi 13,92 g L -1 e o rendimento 0,49 g g -1 .

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“…In 2010, the production of sugarcane bagasse in Indonesia was about 2.9 million tons per year [19]. Several alternatives for sugarcane bagasse utilization have been developed, such as animal feed [20], bioethanol feedstock [21][22][23], and carrier for immobilization [5,8].…”

Section: Introductionmentioning

confidence: 99%

Sugarcane Bagasse as a Carrier for the Immobilization of Saccharomyces cerevisiaein Bioethanol Production

Anita

Mangunwardoyo

Yopi

2016

MST

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Sugarcane bagasse was used as a carrier to immobilize Saccharomyces cerevisiae in bioethanol production. This research aims to study the potential use of sugarcane bagasse as an alternative carrier for cell immobilization and improvement in the production process of cell immobilization in bagasse. The results showed that the physical characteristics of sugarcane bagasse as a carrier were water content (7.77 ± 0.35%), water retention (4.80 ± 0.44 g/g), water absorption index (8.58 ± 0.22 g/g), and lignin content (24.40 ± 1.52 %). Determination of cell retention was performed in an inoculum volume of 50 mL yeast suspension with various carrier weights (2.5, 5, 10, and 20 g). The highest cell retention was obtained in ratio of 2.5 g carrier/50 mL cell suspension with cell retention of 5.41 ± 1.06 mg/g, or known as biocatalyst. Biocatalyst, as much as 1.5, 3, 4.5, and 6 g, were used as inoculum for a 24 hour bioethanol fermentation. The best concentration and productivity of bioethanol, obtained by using 3 g of biocatalyst, were 23.95 ± 0.28 g/L and 1.24 ± 0.01 g/L/hours. The average of bioethanol yield for a 24 hour fermentation by using immobilized cells was three times higher than the free cells system. AbstrakBagas sebagai Carrier untuk Imobilisasi Saccharomyces cerevisiae pada Produksi Bioetanol. Bagas digunakan sebagai carrier untuk imobilisasi pada produksi bioetanol. Penelitian bertujuan untuk mengetahui potensi penggunaan bagas sebagai carrier alternatif untuk imobilisasi sel dan perbaikan proses pembuatan imobilisasi sel pada bagas. Hasil penelitian menunjukkan bahwa karakteristik fisik yang dimiliki bagas sebagai carrier yaitu kadar air (7,77 ± 0,35%), retensi air (4,80 ± 0,44 g/g), indeks penyerapan air (8,58 ± 0,22 g/g), dan kadar lignin (24,40 ± 1,52%). Pengukuran retensi sel dilakukan pada variasi berat carrier (2,5, 5, 10, dan 20 g) dengan volume inokulum sebanyak 50 mL suspensi sel. Retensi sel tertinggi, diperoleh pada perbandingan 2,5 g carrier/50 mL suspensi sel, yaitu 5,41 ± 1,06 mg/g dan disebut sebagai biokatalis. Biokatalis sebanyak 1,5; 3; 4,5; dan 6 g digunakan sebagai inokulum untuk fermentasi bioetanol selama 24 jam. Konsentrasi dan produktivitas bioetanol terbaik menggunakan 3 g biokatalis yaitu 23,95 ± 0,28 g/L dan 1,24 ± 0,01 g/L/jam. Rendemen bioetanol selama 24 jam fermentasi menggunakan sel terimobilisasi adalah tiga kali lebih tinggi dibandingan dengan sel bebas.

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Bioconversion of Sugarcane Biomass into Ethanol: An Overview about Composition, Pretreatment Methods, Detoxification of Hydrolysates, Enzymatic Saccharification, and Ethanol Fermentation

Cited by 469 publications

References 85 publications

Screening of Yeasts for Selection of Potential Strains and Their Utilization for In Situ Microbial Detoxification (ISMD) of Sugarcane Bagasse Hemicellulosic Hydrolysate

Screening of Yeasts for Selection of Potential Strains and Their Utilization for In Situ Microbial Detoxification (ISMD) of Sugarcane Bagasse Hemicellulosic Hydrolysate

Valorization of sunflower meal through the production of ethanol from the hemicellulosic fraction

Sugarcane Bagasse as a Carrier for the Immobilization of Saccharomyces cerevisiaein Bioethanol Production

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