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Animal Waste and Hazardous Substances: Current Laws and Legislative Issues

Description: This report describes the provisions of the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA, the Superfund law) and the Emergency Planning and Community Right-to-Know Act (EPCRA), and enforcement actions under these laws that have increasingly been receiving attention. Congressional scrutiny in the form of legislative proposals and two House hearings are discussed. Bills intended to exempt animal manure from the requirements of Superfund and EPCRA were introduced in the 109th Congress. Similar bills were introduced in the 110th Congress (H.R. 1398 and S. 807), but no legislation has been enacted. Issues raised by the legislation are analyzed.
Date: January 21, 2009
Creator: Copeland, Claudia
Partner: UNT Libraries Government Documents Department

Logging and Agricultural Residue Supply Curves for the Pacific Northwest

Description: This report quantified the volume of logging residues at the county level for current timber harvests. The cost of recovering logging residues was determined for skidding, yearding, loading, chipping and transporting the residues. Supply curves were developed for ten candidate conversion sites in the Pacific Northwest Region. Agricultural field residues were also quantified at the county level using five-year average crop yields. Agronomic constraints were applied to arrive at the volumes available for energy use. Collection costs and transportation costs were determined and supply curves generated for thirteen candidate conversion sites.
Date: January 1, 2001
Creator: Kerstetter, James D. & Lyons, John Kim
Partner: UNT Libraries Government Documents Department

Assessment of Options for the Collection, Handling, and Transport of Corn Stover

Description: In this report, we discuss the logistics and estimate the delivered costs for collecting, handling, and hauling corn stover to an ethanol conversion facility. We compare costs for two conventional baling systems (large round bales and large rectangular bales), a silage-harvest system, and an unprocessed-pickup system. Our results generally indicate that stover can be collected, stored, and hauled for about $43.60 to $48.80/dry ton ($48.10-$53.80/dry Mg) using conventional baling equipment for conversion facilities ranging in size from 500 to 2000 dry tons/day (450-1810 dry Mg/day). These estimates are inclusive of all costs including farmer payments for the stover. Our results also suggest that costs might be significantly reduced with an unprocessed stover pickup system provided more efficient equipment is developed.
Date: November 18, 2002
Creator: Perlack, R.D.
Partner: UNT Libraries Government Documents Department

Biofuels News, Vol. 3, No. 1 (Spring/Summer 2000)

Description: This is the Newsletter for DOE Biofuels Program. Articles are presented on collection and use of corn stover for bioethanol production, the state workshop program on ethanol, and a subcontract to Genencor for improvement of cellulase enzyme production.
Date: August 15, 2000
Creator: Brown, H.
Partner: UNT Libraries Government Documents Department

Fundamental study on kinetics and transport phenomena in low water dilute acid total hydrolysis of cellulosic biomass

Description: The overall objective of this research is to delineate the process of the dilute-acid hydrolysis of biomass and seek better understanding of the reactions involving dilute-acid treatment of lignocellulosic biomass. Specifically the scope of the work entails the following two primary technical elements: Verification of the heterogeneous nature of the reaction mechanism in dilute-acid hydrolysis of cellulosic component of the biomass. Experimental investigation to identify the overall reaction pattern and the kinetic constants associated with dilute-acid hydrolysis of the cellulosic component of the agricultural residues.
Date: April 7, 2004
Creator: Auburn University
Partner: UNT Libraries Government Documents Department

Development of the Integrated Biomass Supply Analysis and Logistics Model (IBSAL)

Description: The Integrated Biomass Supply & Logistics (IBSAL) model is a dynamic (time dependent) model of operations that involve collection, harvest, storage, preprocessing, and transportation of feedstock for use at a biorefinery. The model uses mathematical equations to represent individual unit operations. These unit operations can be assembled by the user to represent the working rate of equipment and queues to represent storage at facilities. The model calculates itemized costs, energy input, and carbon emissions. It estimates resource requirements and operational characteristics of the entire supply infrastructure. Weather plays an important role in biomass management and thus in IBSAL, dictating the moisture content of biomass and whether or not it can be harvested on a given day. The model calculates net biomass yield based on a soil conservation allowance (for crop residue) and dry matter losses during harvest and storage. This publication outlines the development of the model and provides examples of corn stover harvest and logistics.
Date: June 1, 2008
Creator: Sokhansanj, Shahabaddine; Webb, Erin & Turhollow Jr, Anthony F
Partner: UNT Libraries Government Documents Department

Cost Methodology for Biomass Feedstocks: Herbaceous Crops and Agricultural Residues

Description: This report describes a set of procedures and assumptions used to estimate production and logistics costs of bioenergy feedstocks from herbaceous crops and agricultural residues. The engineering-economic analysis discussed here is based on methodologies developed by the American Society of Agricultural and Biological Engineers (ASABE) and the American Agricultural Economics Association (AAEA). An engineering-economic analysis approach was chosen due to lack of historical cost data for bioenergy feedstocks. Instead, costs are calculated using assumptions for equipment performance, input prices, and yield data derived from equipment manufacturers, research literature, and/or standards. Cost estimates account for fixed and variable costs. Several examples of this costing methodology used to estimate feedstock logistics costs are included at the end of this report.
Date: December 1, 2009
Creator: Turhollow Jr, Anthony F; Webb, Erin & Sokhansanj, Shahabaddine
Partner: UNT Libraries Government Documents Department

Biomechanics of Wheat/Barley Straw and Corn Stover

Description: The lack of understanding of the mechanical characteristics of cellulosic feedstocks is a limiting factor in economically collecting and processing crop residues, primarily wheat and barley stems and corn stover. Several testing methods, including compression, tension, and bend have been investigated to increase our understanding of the biomechanical behavior of cellulosic feedstocks. Biomechanical data from these tests can provide required input to numerical models and help advance harvesting, handling, and processing techniques. In addition, integrating the models with the complete data set from this study can identify potential tools for manipulating the biomechanical properties of plant varieties in such a manner as to optimize their physical characteristics to produce higher value biomass and more energy efficient harvesting practices.
Date: March 1, 2005
Creator: Wright, Christopher T.; Pryfogle, Peter A.; Stevens, Nathan A.; Steffler, Eric D.; Hess, J. Richard & Ulrich, Thomas H.
Partner: UNT Libraries Government Documents Department

Environmental Enhancement Through Corn Stover Utilization: Cooperative Research and Development Final Report, CRADA Number CRD-06-00174

Description: We have developed a rapid bio-oil analysis protocol based on the application of mass spectrometry, infra-red spectrometry, and multivariate statistical analysis. This protocol was successfully applied to characterize bio-oil samples from the Iowa State University (ISU) fast pyrolysis unit and to relate those characteristics to the feedstock and the process conditions.
Date: August 1, 2010
Creator: Czernik, S.
Partner: UNT Libraries Government Documents Department

Energy data. Technical progress report, October--December 1995

Description: The purpose of this field test was to evaluate cotton stalk removal and burial equipment developed by the Pegasus Corporation. The test field was located at the USDA Cotton Research Station, Shafter, CA. The treatments were: stalks standing, stalks shredded, irrigated and non-irrigated.
Date: February 5, 1996
Creator: Thacker, G.W.
Partner: UNT Libraries Government Documents Department

Preparation for commercial demonstration of biomass-to-ethanol conversion technology. Final report

Description: The objective of this program was to complete the development of a commercially viable process to produce fuel ethanol from renewable cellulosic biomass. The program focused on pretreatment, enzymatic hydrolysis, and fermentation technologies where Amoco has a unique proprietary position. Assured access to low-cost feedstock is a cornerstone of attractive economics for cellulose to ethanol conversion in the 1990s. Most of Amoco`s efforts in converting cellulosic feedstocks to ethanol before 1994 focused on using paper from municipal solid waste as the feed. However, while many municipalities and MSW haulers expressed interest in Amoco`s technology, none were willing to commit funding to process development. In May, 1994 several large agricultural products companies showed interest in Amoco`s technology, particularly for application to corn fiber. Amoco`s initial work with corn fiber was encouraging. The project work plan was designed to provide sufficient data on corn fiber conversion to convince a major agriculture products company to participate in the construction of a commercial demonstration facility.
Date: July 1, 1997
Partner: UNT Libraries Government Documents Department

Biomass stakeholder views and concerns: Environmental groups and some trade association

Description: This exploratory study of the views and concerns of 25 environmental organizations found high interest and concern about which biomass feedstocks would be used and how these biomass materials would be converted to energy. While all favored renewable energy over fossil or nuclear energy, opinion diverged over whether energy crops, residues, or both should be the primary source of a biomass/bioenergy fuel cycle. About half of the discussants favored biomass ``in general'' as a renewable energy source, while the others were distributed about equally over five categories, from favor-with-conditions, uncertain, skeptical, opposed, to ``no organizational policy.''
Date: January 1, 2000
Creator: Peelle, E.
Partner: UNT Libraries Government Documents Department

Anaerobic digestion of livestock manures: A current opportunities casebook

Description: Growth and concentration of the livestock industry creates new opportunities for proper disposal of the large quantities of manures generated at dairy, swine, and poultry farms. One manure management system provides not only pollution prevention but also converts a problem into a new profit center. Economic evaluations and case studies of operating systems indicate that the anaerobic digestion of livestock manures is a commercially-available bioconversion technology with considerable potential for providing profitable co-products, including a renewable fuel. An introduction to the engineering economies of these technologies is provided, based on estimates of digesters that generate electricity from the recovered methane. Regression models used to estimate digester cost and internal rate of return are developed from the evaluations. Case studies of operating digesters, including project and maintenance histories, and the operator`s {open_quotes}lessons learned{close_quotes}, are provided as a reality check.
Date: August 1, 1995
Creator: Lusk, P.D.
Partner: UNT Libraries Government Documents Department

Advanced Biocatalytic Processing of Heterogeneous Lignocellulosic Feedstocks to a Platform Chemical Intermediate (Lactic acid Ester)

Description: The development of commercial boi-based processes and products derived from agricultural waste biomass has the potential for significant impact on the economy and security of our nation. Adding value, rather than disposing of the waste of agriculture, can solve an environmental problem and reduce our dependence on foreign sources of fossil fuel for production of chemicals, materials and fuels.
Date: September 3, 2004
Creator: Shoemaker, Dr. Sharon
Partner: UNT Libraries Government Documents Department

Biomass Gasifier Facility (BGF). Environmental Assessment

Description: The Pacific International Center for High Technology Research (PICHTR) is planning, to design, construct and operate a Biomass Gasifier Facility (BGF). This facility will be located on a site easement near the Hawaiian Commercial & Sugar company (KC&S) Paia Sugar Factory on Maui, Hawaii. The proposed BGF Project is a scale-up facility, intended to demonstrate the technical and economic feasibility of emerging biomass gasification technology for commercialization. This Executive Summary summarizes the uses of this Environmental Assessment, the purpose and need for the project, project,description, and project alternatives.
Date: September 1, 1992
Partner: UNT Libraries Government Documents Department

Detection of Cell Wall Chemical Variation in Zea Mays Mutants Using Near-Infrared Spectroscopy

Description: Corn stover is regarded as the prime candidate feedstock material for commercial biomass conversion in the United States. Variations in chemical composition of Zea mays cell walls can affect biomass conversion process yields and economics. Mutant lines were constructed by activating a Mu transposon system. The cell wall chemical composition of 48 mutant families was characterized using near-infrared (NIR) spectroscopy. NIR data were analyzed using a multivariate statistical analysis technique called Principal Component Analysis (PCA). PCA of the NIR data from 349 maize leaf samples reveals 57 individuals as outliers on one or more of six Principal Components (PCs) at the 95% confidence interval. Of these, 19 individuals from 16 families are outliers on either PC3 (9% of the variation) or PC6 (1% of the variation), the two PCs that contain information about cell wall polymers. Those individuals for which altered cell wall chemistry is confirmed with wet chemical analysis will then be subjected to fermentation analysis to determine whether or not biomass conversion process kinetics, yields and/or economics are significantly affected. Those mutants that provide indications for a decrease in process cost will be pursued further to identify the gene(s) responsible for the observed changes in cell wall composition and associated changes in process economics. These genes will eventually be incorporated into maize breeding programs directed at the development of a truly dual use crop.
Date: January 1, 2001
Creator: Buyck, N. & Thomas, S.
Partner: UNT Libraries Government Documents Department

Combined Grinding and Drying of Biomass in One Operation Phase I

Description: First American Scientific Corporation (FASC) has developed a unique and innovative grinder/dryer called KDS Micronex. The KS (Kinetic Disintegration System) combines two operations of grinding and drying into a single operation which reduces dependence on external heat input. The machine captures the heat of comminution and combines it will centrifugal forces to expedite moisture extraction from wet biomass. Because it uses mechanical forces rather than providing direct heat to perform the drying operation, it is a simpler machine and uses less energy than conventional grinding and drying operations which occur as two separate steps. The entire compact unit can be transported on a flatbed trailer to the site where biomass is available. Hence, the KDS Micronex is a technology that enables inexpensive pretreatment of waste materials and biomass. A well prepared biomass can be used as feed, fuel or fertilizer instead of being discarded. Electricity and chemical feedstock produced from such biomass would displace the use of fossil fuels and no net greenhouse gas emissions would result from such bio-based operations. Organic fertilizers resulting from the KS Micronex grinding/drying process will be pathogen-free unlike raw animal manures. The feasibility tests on KS during Phase I showed that a prototype machine can be developed, field tested and the technology demonstrated for commercial applications. The present KDS machine can remove up to 400 kg/h of water from a wet feed material. Since biomass processors demand a finished product that is only 10% moist and most raw materials like corn stover, bagasse, layer manure, cow dung, and waste wood have moisture contents of the order of 50%, this water removal rate translates to a production rate of roughly half a ton per hour. this is too small for most processors who are unwilling to acquire multiple machines because of the added complexity to ...
Date: June 26, 2008
Creator: Sokhansanj, S.
Partner: UNT Libraries Government Documents Department

A case study of agricultural residue availability and cost for a cellulosic ethanol conversion facility in the Henan province of China

Description: A preliminary analysis of the availability and cost of corn stover and wheat straw for the area surrounding a demonstration biorefinery in the Henan Province of China was performed as a case study of potential cooperative analyses of bioenergy feedstocks between researchers and industry in the US and China. Though limited in scope, the purpose of this analysis is to provide insight into some of the issues and challenges of estimating feedstock availability in China and how this relates to analyses of feedstocks in the U.S. Completing this analysis also highlighted the importance of improving communication between U.S. researchers and Chinese collaborators. Understanding the units and terms used in the data provided by Tianguan proved to be a significant challenge. This was further complicated by language barriers between collaborators in the U.S. and China. The Tianguan demonstration biorefinery has a current capacity of 3k tons (1 million gallons) of cellulosic ethanol per year with plans to scale up to 10k tons (3.34 million gallons) per year. Using data provided by Tianguan staff in summer of 2011, the costs and availability of corn stover and wheat straw were estimated. Currently, there are sufficient volumes of wheat straw and corn stover that are considered 'waste' and would likely be available for bioenergy in the 20-km (12-mile) region surrounding the demonstration biorefinery at a low cost. However, as the industry grows, competition for feedstock will grow and prices are likely to rise as producers demand additional compensation to fully recover costs.
Date: May 1, 2012
Creator: Webb, Erin & Wu, Yun
Partner: UNT Libraries Government Documents Department

Developing an Integrated Model Framework for the Assessment of Sustainable Agricultural Residue Removal Limits for Bioenergy Systems

Description: Agricultural residues have significant potential as a feedstock for bioenergy production, but removing these residues can have negative impacts on soil health. Models and datasets that can support decisions about sustainable agricultural residue removal are available; however, no tools currently exist capable of simultaneously addressing all environmental factors that can limit availability of residue. The VE-Suite model integration framework has been used to couple a set of environmental process models to support agricultural residue removal decisions. The RUSLE2, WEPS, and Soil Conditioning Index models have been integrated. A disparate set of databases providing the soils, climate, and management practice data required to run these models have also been integrated. The integrated system has been demonstrated for two example cases. First, an assessment using high spatial fidelity crop yield data has been run for a single farm. This analysis shows the significant variance in sustainably accessible residue across a single farm and crop year. A second example is an aggregate assessment of agricultural residues available in the state of Iowa. This implementation of the integrated systems model demonstrates the capability to run a vast range of scenarios required to represent a large geographic region.
Date: August 1, 2011
Creator: David Muth, Jr.; Abodeely, Jared; Nelson, Richard; McCorkle, Douglas; Koch, Joshua & Bryden, Kenneth
Partner: UNT Libraries Government Documents Department

Your World Magazine - Biofuels: Energy for Your Future

Description: Policymakers have been talking for years about measures to cut back how much petroleum we use. Interest has spiked recently, with government and private companies coming together to push forward scientific research and development of alternative fuel products such as ethanol. Biotechnology is helping make alternative energy sources easier - and more affordable - to produce. Most of the world's energy needs are met with oil and natural gas, which come from fossil fuel. No one knows how long the supply can last. Biobased fuels come from natural sources that can be replaced quickly. Along with corn, there are many other grains, grasses, trees, and even agricultural wastes being investigated for their usefulness and environmental friendliness as alternative fuel sources. Careers in this emerging new field emphasize chemistry and engineering. Look into it for a potential career - it's definitely a job full of energy.
Date: October 1, 2006
Creator: Institute, Biotechnology
Partner: UNT Libraries Government Documents Department

Sorghum to Ethanol Research Initiative: Cooperative Research and Development Final Report, CRADA Number CRD-08-291

Description: The goal of this project was to investigate the feasibility of using sorghum to produce ethanol. The work performed included a detailed examination of the agronomics and composition of a large number of sorghum varieties, laboratory experiments to convert sorghum to ethanol, and economic and life-cycle analyses of the sorghum-to-ethanol process. This work showed that sorghum has a very wide range of composition, which depended on the specific sorghum cultivar as well as the growing conditions. The results of laboratory- and pilot-scale experiments indicated that a typical high-biomass sorghum variety performed very similarly to corn stover during the multi-step process required to convert biomass feedstocks to ethanol; yields of ethanol for sorghum were very similar to the corn stover used as a control in these experiments. Based on multi-year agronomic data and theoretical ethanol production, sorghum can achieve more than 1,300 gallons of ethanol per acre given the correct genetics and environment. In summary, sorghum may be a compelling dedicated bioenergy crop that could help provide a portion of the feedstocks required to produce renewable domestic transportation fuels.
Date: October 1, 2011
Creator: Wolfrum, E.
Partner: UNT Libraries Government Documents Department