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The USDA, Forest Service, Forest Products Lab funds several grants each year for the purpose of studying woody biomass utilization. One selected project proposed removing small diameter stems and unmerchantable woody material from National Forest lands and delivering it to a coal-fired power plant…
Author(s): Dana Mitchell, Bob Rummer
Keywords: biomass, forest engineering, harvesting, logging, chipper, grinder
Source: In: ASABE 2007 Annual International MEeting, Minneapolis, Minnesota. 17-20 June 2007. 6 p.
Year: 2007
A study was initiated in 2006 to develop an understanding of the considerations of using extended work hours in the logging industry in the southeastern United States. Through semistructured interviews, it was obvious that loggers were individually creating ways of successfully implementing…
Author(s): Dana Mitchell, Tom Gallagher
Keywords: human factors, shift work, extended working hours, logging
Source: In: Proceedings of the 2007 ASABE Annual International Meeting. ASABE Paper No. 075011.
Year: 2007
A time and motion study was conducted to determine the productivity and cost of an in-woods chipping operation when processing whole mall-diameter trees for biomass. The study removed biomass from two overstocked stands and compared the cost of this treatment to existing alternatives. The treatment…
Author(s): Dana Mitchell, Tom Gallagher
Keywords: biomass, hog fuel, harvesting, production
Source: South. J. Appl. For., Vol. 31(4): 176-180
Year: 2007
The John Deere bundler was originally designed to collect material behind a cut‐to‐length (CTL) operation, where the biomass feedstock is distributed across the harvested site. While the occurrence of a CTL operation is common in Europe, it is rarely used in the southern United States. Southern…
Author(s): S. Meadows, T. Gallagher, D. Mitchell
Source: In: Proceedings of 2010 COFE: 33rd Annual Meeting of the Council on Forest Engineering, June 6-9, 2010, [CD-ROM]. Auburn, AL.
Year: 2010
Newly announced North American bioenergy projects will likely increase the demand for woody biomass substantially over the next five to ten years. High harvesting and transportation costs for woody biomass from forests are commonly identified as key constraints to expanding this new industry and…
Author(s): J. Cutshall, D. Greene, S. Baker, Dana Mitchell
Source: In: Proceedings of the 34th Council on Forest Engineering annual meeting, Quebec City, Quebec, Canada, June 2011. p.1-9.
Year: 2011
The topic of declining fossil fuels and the absolute need for renewable energy sources is very evident in today’s society. The utilization of bio-fuels is necessary to meet goals set forth in the Energy Independence and Security Act of 2007. Included in the act are standards in which bio-fuels will…
Author(s): P. Jernigan, T. Gallagher, Dana Mitchell, L. Teeter
Source: Proceedings of the 34th Council on Forest Engineering annual meeting, Quebec City, Quebec, Canada, June 2011. 6p.
Year: 2011
The working environment around logging operations can be very dusty. But, air quality around logging operations is not well documented. Equipment movements and trafficking on the landing can cause dust to rise into the air. The addition of a biomass chipper creates different air flow patterns and…
Author(s): Dana Mitchell
Keywords: biomass harvesting, air quality, air sampling, biomass ash content, human health
Source: Proceedings of the 34th Council on Forest Engineering annual meeting, Quebec City, Quebec, Canada, June 2011. 9p.
Year: 2011
Conventional forestry equipment is often used to harvest small-diameter trees. The typical ground-based logging operation is highly mechanized, with the most common using feller-bunchers, grapple skidders, and a chipper or grinder. But these machines may not be economical when used in pre-…
Author(s): Dana Mitchell
Source: Technical release 08-R-16. Rockville, MD: Forest Resources Association, Inc. 2 p.
Year: 2008
Torrefaction is a thermo-chemical process that reduces the moisture content of wood and transforms it into a brittle, char-type material. The thermo-chemical process can reduce the mass of wood by 20-30% resulting in a denser, higher-valued product that can be transported more economically than…
Author(s): D. Mitchell, T. Elder
Source: In: Proceedings of 2010 COFE: 33rd Annual Meeting of the Council on Forest Engineering. Auburn, AL: June 6-9, 2010. [CD-ROM] 1-7.
Year: 2010
Some logging business owners are trying to manage their equipment assets by increasing the scheduled machine hours. The intent is to maximize the total tons produced by a set of equipment. This practice is referred to as multi-shifting, double-shifting, or extended working hours. One area often…
Author(s): D. Mitchell, T. Gallagher
Source: Forest Operations Review, Summer, 2010 12(3):24-26
Year: 2010
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