دانلود رایگان مقاله لاتین تولید نفت میکروبی از سایت الزویر
عنوان فارسی مقاله:
روند دو مرحله متوالی برای تولید نفت میکروبی و اتانول از آب سورگوم شیرین
عنوان انگلیسی مقاله:
Two consecutive step process for ethanol and microbial oil production from sweet sorghum juice
سال انتشار : 2016
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مقدمه انگلیسی مقاله:
1. Introduction
Sweet sorghum is a sugar rich crop that has been considered an alternative feedstock to sugarcane for first generation ethanol production in tropical countries, due to its efficient C4-photosynthesis, short production cycle, and nitrogen and water use efficiency, high tolerance to environmental stress and adaptability to marginal lands [1]. Sweet sorghum presents additional advantages: (a) it can be considered a multiproduct crop due to its high sugar productivity and its grain with adequate nutritional characteristics [2], (b) it can sustain a full year production cycle as sweet sorghum is capable in the tropics of ratoon crops [3], and c) it can be grown without the addition of chemical fertilizers [4]. Asweet sorghumdisadvantage is a short harvest window, which can be overcome by employing cultivars with different plant cycles or using the same variety sowed at different dates, or both [1]. Moreover, the harvested stalk sugar content and proportions of individual sugars deteriorates rapidly at ambient temperatures with negative consequences for further processing. A practical sug gestion is to extract and clarify the juice,then concentrate and store the syrup [5]. Fuel ethanol production from sugar or starch rich crops, byproducts or wastes has been investigated thoroughly; the research findings and the present industrial practice have been summarized in several recent reviews [6,7]. There are two mature technologies producing in an unprecedented scale ethanol as a biofuel, using corn starch as a raw material in the USAand cane juice and molasses in Brazil. In the former, glucose is the main carbon source, in the latter, a mixture of sucrose and reducing sugars. In Europe beet molasses, alone or in mixtures with cane molasses, are used as raw material for ethanol production; sucrose being the predominant sugar in beet molasses. Other crops have also been considered; among those that excel are: (a) Jerusalem artichoke [8] which accumulates inulin as the major carbohydrate that can be hydrolyzed by inulinase to a mixture offructose, glucose andfructo-oligosaccharides;(b) carobpods [9] sugars which are a mixture of sucrose, glucose and fructose; and (c) sweet sorghum which accumulates in the mature stem a mixture of sucrose, glucose and fructose [1–4]. Sweet sorghum has been studied extensively as a raw material for ethanol production [10,11]. However, there is presently no industrial ethanol production from this raw material. The extensive research published employing sorghum juice has been donein the laboratory or small pilot units in which juice extraction is done in small roller mills with very poor performance. In order to increase sugar extraction efficiency, the simultaneous extractionfermentation technique employing sweet sorghum stem particles suspended in water has been employed in small scale [2–4]. Developments have taken place in solid substrate fermentation of milled sorghum stalks and continuous pilot units have been designed, built and operated [12,13]. New strategies have been proposed to transform simultaneously not only the soluble sugars but the carbohydrates produced by the hydrolysis ofthe lignocellulosic matrix [14,15]. Several researchers have investigated the very high gravity (VGH) ethanol fermentation from sweet sorghum syrups [16,17] in order to find the maximum sugar conversion into ethanol and the minimization of fermentation byproducts, by testing different ethanol tolerant yeasts, several nitrogen sources and adding other nutrients.
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کلمات کلیدی:
Microbial oil production from various carbon sources and its use for ... onlinelibrary.wiley.com/doi/10.1002/bbb.1372/abstract by J Xu - 2013 - Cited by 42 - Related articles Nov 26, 2012 - This paper reviews the current trend of using various carbon sources for microbial oils production, including carbon dioxide, conventional ... Biotechnological production of ethanol: Biochemistry, processes and ... onlinelibrary.wiley.com/doi/10.1002/elsc.201400199/full Jan 4, 2016 - conversion yield of ethanol produced per glycerol consumed ... of vegetable oils, animal fats, waste/used fats/oils and microbial oils with short ... [PDF]Download Preface 1 PDF - Springer www.springer.com/cda/content/document/cda.../9783319302034-p1.pdf?SGWID... Chapters “Oil Crops in the Context of Global Biodiesel Production” and “An ... sented and discussed in Chapter “Pretreatment Processes for Cellulosic Ethanol ... from oleaginous microorganisms cultivation in alternative substrates for microbial. Production Strategies and Applications of Microbial Single Cell Oils https://www.ncbi.nlm.nih.gov › NCBI › Literature › PubMed Central (PMC) by K Ochsenreither - 2016 - Cited by 4 - Related articles Oct 5, 2016 - However, microbial lipids or single cell oils, produced by oleaginous ... In general, downstream processing costs are one of the major obstacles to ..... et al., 2013) and ethanol (Yang et al., 2014) has been successfully shown. A systems analysis of biodiesel production from wheat straw using ... https://www.ncbi.nlm.nih.gov › NCBI › Literature › PubMed Central (PMC) by H Karlsson - 2016 - Related articles Oct 25, 2016 - This study examined a technical process and its mass and energy ... Keywords: Lignocellulosic materials, Diesel, Biogas, Microbial oil, Systems ... Ethanol production from lignocellulosic biomass has been extensively studied. Green Fuel Technology. Microbial Oil Production from Oleaginous ... https://books.google.com/books?isbn=3960670443 Selvaraj Ranganathan, Ganesh Moorthy Innasi Muthu - 2016 - Technology & Engineering Synthetic biodiesel can be produced from this renewable carbon source using the Fischer-Tropsch process. Although conversion of lignocellulose ... In terms of ethanol production, starches (maize, wheat, barley, etc.) and sugar-rich biomass ...
