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Author: Emily Lucille Hunter
Publisher:
ISBN:
Category :
Languages : en
Pages : 222
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Author: Emily Lucille Hunter
Publisher:
ISBN:
Category :
Languages : en
Pages : 222
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Author: Gary John Gascho
Publisher:
ISBN:
Category : Agriculture and energy
Languages : en
Pages : 35
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Studies were conducted to evaluate the potential of sweet sorghum as a fuel ethanol feedstock for the southern coastal plain. Several cultural aspects were studied and a methol for rapid evaluation of the fermentable sugar concentrtions in the stalks was developed. The major findings of the studies were. 1. Wray, M81E, and MN1500 were the highest yielding early, medium, and late-maturing cultivars tested. Because of its high sugar concentration and resistance to lodging, Wray was the best single cultivar. 2. On the better agricultural soils of the area, the yield potential is five to six metric tons of total sugars per hectare. 3. The best planting time is in early May. Yields are reduced in plantings after mid-May because of early maturity and damage from the fall armyworm (Spodoptera frugiperda (J.E. Smith). The best harvest time is at the soft, to hard-dough stages of the seed. To maintain a constant supply of high-yielding sweet sorghum for a fuel ethanol plant, it was demonstrated the combinations of cultivars, planting dates, and harvest stages resulted in 95% of maximum sugar yield over a four-month period. 5. Nutrient requirements for sweet sorghum were low in comparisons to corn. No response to P or K was found when the soil test was high or medium for the elements, respectively. For a medium P soil test, yield responses were obtained to at least 25 kg P/ha. For a low K test, response was obtained to 186 kg K/ha. Response was obtained to about 100 kg N/ha. The N application should be split, with about one-half to two-thirds applied as a sidedressing when the sorghum is 30 to 60 cm high. No response was found to a 10-34-0 starter fertilizer, but the P soil test was high in this study. 6. The actual removal of nutrients by a sweet sorghum crop was determined to be 1,5 kg/MT fresh stalks for N, 0.3 for P, 1.8 for K, 0,6 for Ca and 0,3 for Mg. 7. No yield advantage was found in decreasing the row sapcing from 90 cm nor was there as advantage to increasing the population above 75 thousand plants per hectare. 8. The best control of annual grasses was obtained with a propazine plus metolachlor treatment. 9. No positive responses were found to the application of several growth regulators. 10. As automated analysis for determining the concentrations of total sugars in fresh or frozen sweet sorghum stalks was developed using an AutoAnalyzer II.
Author: Jaya Shankar Tumuluru
Publisher: BoD – Books on Demand
ISBN: 9535129376
Category : Technology & Engineering
Languages : en
Pages : 518
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This book is the outcome of contributions by many experts in the field from different disciplines, various backgrounds, and diverse expertise. This book provides information on biomass volume calculation methods and biomass valorization for energy production. The chapters presented in this book include original research and review articles. I hope the research presented in this book will help to advance the use of biomass for bioenergy production and valorization. The key features of the book are: Providing information on biomass volume estimation using direct, nondestructive and remote sensing methods Biomass valorization for energy using thermochemical (gasification and pyrolysis) and biochemical (fermentation) conversion processes.
Author: Michael Joseph William Maw
Publisher:
ISBN:
Category : Biomass energy
Languages : en
Pages : 133
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Sweet sorghum has the potential in Missouri for production as a biofuel feedstock, but little is known of the crop's yields and appropriate nitrogen management for optimizing ethanol yields. This thesis is a collection of three field studies examining the potential for sweet sorghum (Sorghum bicolor (L.) Moench) to be adopted as a biofuel feedstock for ethanol production in the Midwestern U.S. Limited research exists examining the optimum nitrogen fertilizer rate for maximum ethanol yields as well as sweet sorghum's adaptability to the lower Midwestern states. The first study included testing the effects of five N fertilizer rates (0, 56, 112, 168, 224 kg-N ha-1) on the production of two sweet sorghum cultivars (Dale and Top 76-6) over three years in central Missouri. Yields measured included dry matter, stem juice, Brix, fermentable sugar, theoretical juice ethanol, theoretical lignocellulosic ethanol, and total theoretical ethanol. N fertilizer treatment mostly increased yields, as total dry matter yield averaged 16.8 Mg ha-1, fermentable sugar yield averaged 1055 kg ha-1, and total ethanol yield averaged 5828 L ha-1 . The optimal range for N fertilizer rates was between 112 and 168 kg N ha-1. The second study included determining the above-ground plant N concentration, plant N content, N recovery efficiency, and physiological N-use efficiency of sorghum from the first study. Nitrogen treatment significantly affected plant N concentration and N content. Greater yields resulted in greater N recovery efficiency but did not always result in greater N-use efficiency. The optimum range for highest nitrogen recovery and use efficiencies was identified as 0-112 kg N ha-1 . The purpose of the third study was to better understand sweet sorghum's affect on soil organic carbon. This involved comparing the effects of an alternative sweet sorghum--soybean (Glycine max L.) rotation to a maize (Zea mays L.)--soybean rotation at three study sites in Missouri and Arkansas on yields, soil organic carbon, the labile soil carbon fraction and the physically-stabilized fraction. Sweet sorghum ethanol yields were greater than maize yields across sites, but the soil carbon similarly decreased regardless of crop and location. Sweet sorghum is a high-yielding biomass feedstock that shows promise for production in Missouri, especially in marginal lands. With proper nitrogen fertilizer management sweet sorghum is shown to be an efficient plant for ethanol yield, but it may negatively affect soil organic carbon following land-use changes for biofuel production.
Author: CV Ratnavathi
Publisher: Academic Press
ISBN: 0128031824
Category : Business & Economics
Languages : en
Pages : 359
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Sorghum Biochemistry: An Industrial Perspective explores the many uses for sorghum in industry and biofuels. Not only does it offer a detailed understanding of the physical and biochemical qualities of the grain, it also takes an in-depth look at the role sorghum plays in such industries as brewing and ethanol production and the mechanics of post-harvest processing and value addition. Sorghum has long been an important staple in Africa and Asia, but its value goes far beyond its uses in human and animal consumption. Sorghum is also used in many industries, including waxes, packing material, wall board, ethanol, beverages, and brewing, and one variety called sweet sorghum has also been used as a bioenergy crop. Sorghum Biochemistry: An Industrial Perspective offers a closer look at how the grain is used in such a variety of ways, and how we can continue to optimize its potential. Provides detailed biochemical studies on grain sorghum to inform researchers grappling with similar issues Offers foundational information on the quality and composition of sorghum as a grain Covers a variety of uses for sorghum in many industries, including food and beverage, energy, and brewing Includes photos and illustrations to enhance the understanding of processes and sorghum biochemistry
Author: Elizabeth Cushion
Publisher: World Bank Publications
ISBN: 0821381296
Category : Business & Economics
Languages : en
Pages : 272
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This book provides an overview of current and future bioenergy developments, describes the impacts related to poverty and the environment, assesses the opportunities and challenges and outlines how future World Bank activities related to bioenergy may be linked to poverty alleviation and environmental protection.
Author: National Research Council
Publisher: National Academies Press
ISBN: 0309176891
Category : Technology & Engineering
Languages : en
Pages : 405
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Scenes of starvation have drawn the world's attention to Africa's agricultural and environmental crisis. Some observers question whether this continent can ever hope to feed its growing population. Yet there is an overlooked food resource in sub-Saharan Africa that has vast potential: native food plants. When experts were asked to nominate African food plants for inclusion in a new book, a list of 30 species grew quickly to hundreds. All in all, Africa has more than 2,000 native grains and fruitsâ€""lost" species due for rediscovery and exploitation. This volume focuses on native cereals, including: African rice, reserved until recently as a luxury food for religious rituals. Finger millet, neglected internationally although it is a staple for millions. Fonio (acha), probably the oldest African cereal and sometimes called "hungry rice." Pearl millet, a widely used grain that still holds great untapped potential. Sorghum, with prospects for making the twenty-first century the "century of sorghum." Tef, in many ways ideal but only now enjoying budding commercial production. Other cultivated and wild grains. This readable and engaging book dispels myths, often based on Western bias, about the nutritional value, flavor, and yield of these African grains. Designed as a tool for economic development, the volume is organized with increasing levels of detail to meet the needs of both lay and professional readers. The authors present the available information on where and how each grain is grown, harvested, and processed, and they list its benefits and limitations as a food source. The authors describe "next steps" for increasing the use of each grain, outline research needs, and address issues in building commercial production. Sidebars cover such interesting points as the potential use of gene mapping and other "high-tech" agricultural techniques on these grains. This fact-filled volume will be of great interest to agricultural experts, entrepreneurs, researchers, and individuals concerned about restoring food production, environmental health, and economic opportunity in sub-Saharan Africa. Selection, Newbridge Garden Book Club
Author: Tran Dang Xuan
Publisher:
ISBN:
Category : Technology
Languages : en
Pages :
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Sweet sorghum (Sorghum bicolour) is a promising alternative crop for bioethanol production in developing countries. However, to extend the cultivative area of this crop, it needs to develop an appropriate growing protocol for farmers. This chapter describes the examination of different doses of fertilizers combined with manure and micronutrients, in various applied times, on biomass, sugar content and ethanol production of sweet sorghum. It was observed that the application of 90 N + 90 P2O5 + 60 K2O provided maximum stem yield and optimum contents of sugar and ethanol yield, however nontreatment of any among P, P2O5 and K2O caused significant reduction of biomass and ethanol production. Higher fertilization >90 N may provide greater productivity of this crop but it may cause lodging and economic deficit for farmers in developing countries. It was also found that the applied times of fertilization should be at 3-4 to 7-8 leaf stage. In contrast, when the fertilization was as close to the flowering stage caused remarkable reduction of stem yield and ethanol production. The supplementation of (NH4)2MO7O2.4H2O at 5 kg/ha provided an increase of 10-12 tons/ha of stem yield and a remarkable enrichment of ethanol production. Findings of this study are useful for farmers and agricultural extensionists to promote biomass and ethanol productivity of this crop for bioethanol production. This research also highlights a greater possibility of exploiting sweet sorghum cultivation in infertile and hilly, abandoned areas for ethanol production.
Author: Nana Baah Appiah-Nkansah
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Sweet sorghum accumulates high concentrations of fermentable sugars in the stem, produces significant amount of starch in the grain (panicle) and has shown to be a promising energy feedstock. Sweet sorghum has a short growing season so adding it to the sugar cane system would be good. The overall goal of this dissertation is to enhance the attractiveness of biofuel production from sweet sorghum to fully utilize fermentable sugars in the juice, starch in the panicle and structural carbohydrates in the stalk for high efficiency and low-cost ethanol production. Sweet sorghum juice was incorporated into the dry-grind process which achieved 28% increase of ethanol yield compared to the conventional ethanol method and decreased enzymatic hydrolysis time by 30 minutes. A very high gravity fermentation technique was applied using sweet sorghum juice and sorghum grain yielded 20.25% (v/v) of ethanol and 96% fermentation efficiency. Response surface methodology was applied in order to optimize diffusion conditions and to explore effects of diffusion time, diffusion temperature, and ratio of sweet sorghum biomass to grain on starch-to-sugar efficiency and total sugar recovery from sweet sorghum. Starch hydrolysis efficiency and sugar recovery efficiency of 96 and 98.5% were achieved, respectively, at an optimized diffusion condition of 115 minutes, 95 °C, and 22% grain loading. Extraction kinetics based on the optimized diffusion parameters were developed to describe the mass transfer of sugars in sweet sorghum biomass during the diffusion process. Ethanol obtained from fermented extracted sugars treated with granular starch hydrolyzing enzyme and those with traditional enzymes were comparable (14.5 -- 14.6% v/v). Ethanol efficiencies also ranged from 88.92 --92.02%.
Author: Kelly Rose Johnson
Publisher:
ISBN:
Category : Biomass energy
Languages : en
Pages : 86
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