Simultaneous saccharification and fermentation (SSF) of industrial wastes for the production of ethanol

Kádár, Zsófia; Szengyel, Zsolt; Réczey, Kati

doi:10.1016/j.indcrop.2003.12.015

Cited by 237 publications

(78 citation statements)

References 8 publications

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“…In this regard, numerous attempts to produce bio-ethanol from biomasses such as rice hulls (Dagnino, Chamorro, Romano, Felissia, & Area, 2013), sugar cane leaves (Hari Krishna, Prasanthi, Chowdary, & Ayyanna, 1998), banana (Hammond, Egg, Diggins, & Coble, 1996), baggase (Martıń et al, 2002), micro-algea (Amin, 2009), sea weed extract (Horn, Aasen, & Østgaard, 2000) industrial waste (Kádár, Szengyel, & Réczey, 2004), corn stover (Kazi et al, 2010), barly straw (Han, Kang, Kim, & Choi, 2013), wood bark, forest residues and switch grass (Hu et al, 2008) agriculture residue (Demirbas, 2009) Instead of many advantages of production of bioethanol from biomass there are few limitations as well. The bioethanol production from feed stocks is not suitable as it affects the food reserves.…”

Section: Raw Materials For Bioethanol Productionmentioning

confidence: 99%

Bioethanol Production from Biomass

Shah¹,

Rehan²

2014

JCB

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Enormous amount of biomass is depositing each day in the environment. The agriculture countries can make use of such resources for various useful purposes. Bioethanol is one of the important commodities which can be produced by using biomass. Bioethanol can be considered as future fuel which has the potential to replace fossil fuels. The selection of raw material, pretreatment process, saccharification and proper selection of yeast and bacteria strains are considered as the key steps in bioethanol production from biomass. Bioethanol is in fact a cheap source of energy and can help in clean environment management. However in few cases consideration are needed to overcome the anomalies of using some specific biomass resources which can affect our food reserves. A brief survey of the various important aspects involved in bioethanol production is done in this review to grasp the basic concept of bioethanol production from biomass.

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Section: Raw Materials For Bioethanol Productionmentioning

confidence: 99%

Bioethanol Production from Biomass

Shah¹,

Rehan²

2014

JCB

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“…O formulado ideal pode ser obtido pelo cocultivo de linhagens superprodutoras dos principais tipos de celulases; 95 pela produção em separado das celulases e posterior mistura dos extratos, em proporções pré-otimizadas; [92][93][94][96][97][98][99][100] ou ainda pela incorporação controlada de genes de celulases em organismos hospedeiros, de forma que a célula modificada já excrete as enzimas em proporções ideais. 61 No âmbito da produção de etanol a partir de materiais lignocelulósicos, as celulases são insumos que impactam significativamente o processo, podendo representar até 18% do custo operacional de uma planta.…”

Section: Tendências Futuras Para a Produção E Aplicação De Celulasesunclassified

Produção, propriedades e aplicação de celulases na hidrólise de resíduos agroindustriais

Castro¹,

Pereira²

2010

Quím. Nova

107

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Recebido em 13/5/09; aceito em 24/6/09; publicado na web em 25/11/09 PRODUCTION, PROPERTIES AND APPLICATION OF CELLULASES IN THE HYDROLYSIS OF AGROINDUSTRIAL RESIDUES. Cellulases have been intensively studied in the past few years, due to the interests in biofuels production from lignocellulosic materials, since they permit maintaining mild conditions during the conversion process. These enzymes can be produced by a broad variety of naturally occurring microorganisms, such as from genera Aspergillus, Trichoderma, Penicillium and Humicola. Targeting the increasing of expression levels, molecular biology tools have been used for heterologous genes insertion in host cells, e. g., Pichia pastoris and Escherichia coli. Enzymes from fungal cellulolytic complex usually act best at pH between 4 and 5 under temperatures from 40 to 60 °C and can be used for either sequential (SHF) or simultaneous (SSF) hydrolysis together alcoholic fermentation. In this review, the main raw materials for production of cellulases are identified, as well as the state of art of enzymes' properties, production and main applications.Keywords: cellulases; agroindustrial residues; lignocellulose. INTRODUÇÃOCelulases são enzimas que constituem um complexo capaz de atuar sobre materiais celulósicos, promovendo sua hidrólise. Estas enzimas são biocatalisadores altamente específicos que atuam em sinergia para a liberação de açúcares, dos quais glicose é o que desperta maior interesse industrial, devido à possibilidade de sua conversão em etanol. 1,2Estas enzimas começaram a ser estudadas durante a Segunda Guerra Mundial. A deterioração de fardas, barracas, bolsas e demais objetos dos acampamentos, fabricados de algodão, chamou a atenção de soldados das forças armadas norte-americanas, instalados nas ilhas Solomon, no Pacífico Sul. Algumas organizações, como a Quartermaster Corps, juntamente com as forças armadas, montaram laboratórios em busca de explicações e soluções imediatas para esse problema, que incluíam a detecção de organismos agentes das deteriorações, seus mecanismos de ação e métodos de controle. O grupo de trabalho, constituído por oito pesquisadores e liderado pelo Dr. Elwyn T. Reese, passou a conduzir seus experimentos no laboratório das forças armadas, em Natick, Massachusets, Estados Unidos. Como resultado das pesquisas, uma linhagem, codificada como QM6a, de um fungo filamentoso, identificado posteriormente como Trichoderma viride, foi isolada e a esta foi atribuída a característica de excretar enzimas capazes de degradar celulose. Até 1953, Dr. Reese e seu grupo de trabalho já haviam determinado que enzimas naturais, nomeadas celulases, constituem complexos de diversas moléculas com distintas habilidades na degradação do substrato. Em 1956, Dr. Reese aliou seus conhecimentos aos da Dra. Mary Mandels, que, em conjunto, passaram a trabalhar no laboratório em Natick. A partir de então, o foco das pesquisas deixou de ser a prevenção da hidrólise da celulose e passou a ser o melhoramento da produção das enzimas responsáveis por esse fe...

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“…Bioethanol as a liquid fuel can readily be integrated into the existing fuel supply systems and directly substitute fossil fuels in the transportation sector 20 . Bioethanol production from lignocellulose requires chemical/physical pretreatment to loosen up the lignocellulosic structure and facilitate enzymatic hydrolysis 15,21 . Biomass pretreatment technology has been widely investigated in recent years and various biological, chemical and physical pretreatment approaches have been proposed to increase the susceptibility of cellulose to enzymatic attack 15,19 .…”

Section: Biotransformation To Fuelmentioning

confidence: 99%

“…Hydrolysis can be performed enzymatically or with mineral acids. Since the process conditions for enzymatic hydrolysis and ethanol fermentation are relatively similar, ethanol from lignocellulosic materials can be produced by a simultaneous saccharification and fermentation process 21,22 . Rapeseed straw is considered as a feedstock for gasification and pyrolysis…”

Section: Biotransformation To Fuelmentioning

confidence: 99%

Possibilities of utilizing the solid by-products of biodiesel production - a review

Gąsiorek

Wilk

2011

Polish Journal of Chemical Technology

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As a consequence of the intended rise in the volume of the biodiesel produced by the member states of the European Union, predominantly from rapeseeds and sunflower seeds, the quantity of the by-products being generated, e.g. glycerol, rapeseed/sunflower seed straw and rapeseed/sunflower seed meal, will increase dramatically. It is therefore recommendable to find effective methods for their processing or utilization in order to reduce the costs of biodiesel production without polluting the environment by excessive wastes. As the utilization of glycerol has often been addressed in the literature 1 , the aim of our study is to describe the potentiality for utilizing the solid by-products of biodiesel production, namely rapeseed/sunflower straw and rapeseed/ sunflower seed meal.

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Simultaneous saccharification and fermentation (SSF) of industrial wastes for the production of ethanol

Cited by 237 publications

References 8 publications

Bioethanol Production from Biomass

Bioethanol Production from Biomass

Produção, propriedades e aplicação de celulases na hidrólise de resíduos agroindustriais

Possibilities of utilizing the solid by-products of biodiesel production - a review

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