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Your search keyword '"*FEEDSTOCK"' showing total 2 results
2 results on '"*FEEDSTOCK"'

1. Biomass production of herbaceous energy crops in the United States: field trial results and yield potential maps from the multiyear regional feedstock partnership.

Author

Lee, Do Kyoung, Aberle, Ezra, Anderson, Eric K., Anderson, William, Baldwin, Brian S., Baltensperger, David, Barrett, Michael, Blumenthal, Jürg, Bonos, Stacy, Bouton, Joe, Bransby, David I., Brummer, Charlie, Burks, Pane S., Chen, Chengci, Daly, Christopher, Egenolf, Josh, Farris, Rodney L., Fike, John H., Gaussoin, Roch, and Gill, John R.

Subjects
*BIOMASS energy, *BUSINESS partnerships, *CROP yields
Abstract

Abstract: Current knowledge of yield potential and best agronomic management practices for perennial bioenergy grasses is primarily derived from small‐scale and short‐term studies, yet these studies inform policy at the national scale. In an effort to learn more about how bioenergy grasses perform across multiple locations and years, the U.S. Department of Energy (US DOE)/Sun Grant Initiative Regional Feedstock Partnership was initiated in 2008. The objectives of the Feedstock Partnership were to (1) provide a wide range of information for feedstock selection (species choice) and management practice options for a variety of regions and (2) develop national maps of potential feedstock yield for each of the herbaceous species evaluated. The Feedstock Partnership expands our previous understanding of the bioenergy potential of switchgrass, Miscanthus, sorghum, energycane, and prairie mixtures on Conservation Reserve Program land by conducting long‐term, replicated trials of each species at diverse environments in the U.S. Trials were initiated between 2008 and 2010 and completed between 2012 and 2015 depending on species. Field‐scale plots were utilized for switchgrass and Conservation Reserve Program trials to use traditional agricultural machinery. This is important as we know that the smaller scale studies often overestimated yield potential of some of these species. Insufficient vegetative propagules of energycane and Miscanthus prohibited farm‐scale trials of these species. The Feedstock Partnership studies also confirmed that environmental differences across years and across sites had a large impact on biomass production. Nitrogen application had variable effects across feedstocks, but some nitrogen fertilizer generally had a positive effect. National yield potential maps were developed using PRISM‐ELM for each species in the Feedstock Partnership. This manuscript, with the accompanying supplemental data, will be useful in making decisions about feedstock selection as well as agronomic practices across a wide region of the country. [ABSTRACT FROM AUTHOR]

Published
2018
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2. Determining optimal size reduction and densification for biomass feedstock using the BioFeed optimization model

Author

Kuan Chong Ting, Zewei Miao, Luis F Rodriguez, Alan C. Hansen, Yogendra Shastri, and Tony E. Grift

Subjects
Switchgrass, Performance, Biomass, Bioengineering, Miscanthus, Bioenergy, Size Reduction, Densification, Challenges, Particle-Size, Corn Stover, Physical-Properties, biology, Bulk-Density, Renewable Energy, Sustainability and the Environment, business.industry, Biomass Feedstock, Systems, Energy consumption, biology.organism_classification, Pulp and paper industry, Bulk density, Renewable energy, Hammer Milling, Agronomy, Biofuel, Environmental science, Perennial Grasses, Particle size, Biofeed, business
Abstract

The benefi ts of particle size reduction and mechanical densifi cation of biomass feedstock for storage, transportation, and handling must be assessed in relation to the systemic costs and energy consumption incurred due to these operations. The goal of this work was to determine the optimal levels of size reduction and densifi cation through a combination of modeling and experimen- tal studies. Size reduction and densifi cation data for Miscanthus and switchgrass were generated using a two-stage grinding process and the energy requirement and bulk densities for the particle sizes between 1 mm and 25.4 mm were determined. Increase in bulk density through compression by a pressure of 1.2 MPa was also measured. These data were used within BioFeed, a system-level optimization model, to simulate scenarios capturing the possibilities of performing size reduction and densifi cation at various stages of the supply chain. Simulation results assuming size reduction at farms showed that the optimal particle size range for both Miscanthus and switchgrass was 4-6 mm, with the optimal costs of $54.65 Mg -1 and $60.77 Mg -1 for Miscanthus and switchgrass, respectively. Higher hammer mill throughput and lower storage costs strongly impacted the total costs for different particle sizes. Size reduction and densifi cation of biomass at the county-specifi c centralized storage and pre-processing facilities could reduce the costs by as much as $6.34 Mg -1 for Miscanthus and $20.13 Mg -1 for switchgrass over the base case. These differences provided the upper bound on the investments that could be made to set-up and operate such systems. © 2014 Society of Chemical Industry and John Wiley & Sons, Ltd Supporting information may be found in the online version of this article.

Published
2014
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