Bioethanol production from rice straw: An overview

Binod, Parameswaran; Sindhu, Raveendran; Singhania, Reeta Rani; Vikram, Surender; Devi, Lalitha; Nagalakshmi, S.; Kurien, Noble; Sukumaran, Rajeev K.; Pandey, Ashok

doi:10.1016/j.biortech.2009.10.079

Cited by 801 publications

(376 citation statements)

References 60 publications

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“…As a lignocellulosic material, rice straw contains 32-47% cellulose, 19-27% hemicellulose, and 5-24% lignin [1]. Lignins are bound phenolic substances [4]; therefore, hydrolysis is needed to free soluble phenolic compounds from its bound form [5].…”

Section: Introductionmentioning

confidence: 99%

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Phenolic Compounds and Antioxidant Activity of Rice Straw Extract

Elzaawely

Maswada

El-Sayed

et al. 2017

ILNS

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Abstract. Agricultural wastes cause a serious environmental problem in Egypt. Utilization of these wastes by an environmentally friendly way is a very important issue. The objective of this study was to utilize rice straw into high-value products. Antioxidant activity, total soluble phenols, and flavonoids were evaluated in ethyl acetate extract prepared from rice straw after alkaline hydrolysis. Total phenols were found to be 221.6 mg gallic acid equivalents (GAE), while total flavonoids were 4.9 mg rutin equivalents (RE). The extract exhibited strong antioxidant activity measured by the 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging method and its IC 50 value was 0.4 mg/ml. Furthermore, the ethyl acetate extract possessed high antioxidant activity assayed by β-carotene bleaching method and its value of lipid peroxidation inhibition (LPI) was 75.4%. It also exhibited high reducing power and its IC 50 value was equal to 0.06 mg/ml. HPLC analysis indicated that this extract contained seven phenolic acids including; protocatechuic, caffeic, syringic, p-coumaric, ferulic, rosmarinic and cinnamic, in addition to two flavonoids; qurecetin and kaempferol. Results indicated that ferulic and p-coumaric acids were the major soluble phenolic acids in rice straw, and their concentrations were 3.9 and 2.9 mg/g DW. It can be summarized that the strong antioxidant activity of ethyl acetate extract, prepared from rice straw, was highly correlated with its high level of phenolic compounds.

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Section: Introductionmentioning

confidence: 99%

“…It was estimated that about 650-975 million tons of rice straw are produced every year worldwide [1]. In Egypt, about 26-35 million tons of agricultural wastes are produced every year [2], and only 11 million tons are utilized for animal feeding and organic fertilization [3].…”

Section: Introductionmentioning

confidence: 99%

Phenolic Compounds and Antioxidant Activity of Rice Straw Extract

Elzaawely

Maswada

El-Sayed

et al. 2017

ILNS

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“…Agriculture residues such as sugarcane bagasse, straw of wheat, rice and corn; wheat bran, corn stover, etc. were successfully used as raw materials for the production of bioethanol, employing cellulases produced by various filamentous fungi including Aspergillus, Trichoderma, and Penicillium [41, [128][129][130].…”

Section: Bioethanolmentioning

confidence: 99%

An Overview on Fungal Cellulases with an Industrial Perspective

Sreedharan¹

2016

J Nutr Food Sci

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Lignocellulose is the most abundant biopolymer available on earth. Hydrolysis of lignocellulose into fermentable sugars, sugar acids and phenolics is the pre-requisite for its successful exploitation as substrates for the large scale production of industrially significant value added products. Though remarkable collection of lignocellulolytic microorganisms has been brought to limelight, only a few especially fungi have been studied extensively as they secrete copious lignocellulolytic enzymes extracellularly. Enzymatic hydrolysis of lignocelluloses is carried out by a group of enzymes viz., cellulases, hemicellulases, ligninases in unison or individually, and are collectively known as lignocellulolytic enzymes. In this light of this background, followed by a short introduction on lignocellulose, lignocellulolytic enzymes and mainly focused on fungal cellulase, this review discusses recent approaches on the production of cellulase by submerged and solid-state fermentation strategies; current knowledge on the purification, characterisation of cellulase; and finally concluded with detailed industrial applications of fungal cellulase.

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“…Até mesmo com biomassas tradicionais ainda existem inovações a serem inseridas no processo, levando a maior eficiência e menor custo [2][3][4].…”

Section: Introductionunclassified

Análise do ciclo de vida aplicada à produção de bioetanol a partir de material Lignocelulósico remanescente em dejeto bovino

Azevedo¹,

Schneider

Souza

et al. 2016

Tecno-log.

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____________________________________________________________________________________________________________ RESUMOBiocombustíveis podem ter uma contribuição significativa na redução de danos ambientais dependendo da sua rota de produção. A produção de bioetanol, ou etanol lignocelulósico, pode ser uma alternativa frente aos combustíveis fósseis e de grande relevância estratégica para o Brasil. Neste contexto, estudamos a análise do ciclo de vida (ACV) da produção de etanol a partir do material lignocelulósico contido no dejeto bovino. Esses dejetos são formados por uma biomassa rica em celulose, que pode ser convertida em glicose e em outros açúcares fermentáveis e, então, ao bioetanol. Para tanto, consideramos como Unidade Funcional o processamento de 1.000 kg de dejeto. Para a análise dos impactos aplicamos o método Ecoindicator 99, através das bibliotecas EcoInvent, do software SimaPro versão 7.3.2. Foram consideradas as seguintes categorias de impacto: cancerígenos, orgânicos e inorgânicos inaláveis, mudanças climáticas, radiação, camada de ozônio, ecotoxicidade, acidificação/eutrofização, uso do solo, minerais e combustíveis fósseis. Para a avaliação de danos ambientais, essas categorias foram agrupadas em três categorias de danos: danos à saúde humana, danos aos ecossistemas e danos aos recursos naturais. De acordo com o estudo realizado, verificamos que o insumo do processo que mais contribuiu na ACV foi o consumo de energia, resultando em maior impacto ambiental na categoria "cancerígenos", agrupada na categoria de "danos à saúde humana". A partir dos resultados, foi possível minimizar os impactos propondo modificações no processo, principalmente nos sistemas de aquecimento que poderão ser utilizados.Palavras-chave: Dejeto bovino. Bioetanol. ACV. ____________________________________________________________________________________________________________

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Bioethanol production from rice straw: An overview

Cited by 801 publications

References 60 publications

Phenolic Compounds and Antioxidant Activity of Rice Straw Extract

Phenolic Compounds and Antioxidant Activity of Rice Straw Extract

An Overview on Fungal Cellulases with an Industrial Perspective

Análise do ciclo de vida aplicada à produção de bioetanol a partir de material Lignocelulósico remanescente em dejeto bovino

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