Moisture Content of Baled Forest and Urban Woody Biomass during Long-term Open Storage

This article describes how the moisture content of baled woody biomass varied during long-term open-air storage under conditions in the Pacific Northwest region of the United States. Large rectangular bales of forest and urban biomass were produced beginning in August 2015 and periodically until June 2016. Weights were measured approximately monthly until the entire lot of bales was ground into fuel in December 2016. Because it was impractical to non-destructively obtain moisture content samples during the study, final moisture content was measured from the ground material. Estimated temporal moisture contents were back-calculated from the final dry weight and moisture content of bales. All bales dried considerably during the spring and summer months, achieving a minimum moisture content in the early fall of 15 to 29% (wb). Minimum early fall moisture content had no correlation with the initial moisture content at time of baling. The ending moisture content in December 2016 ranged from 44% to 57% (wb), with a mean moisture content of 53% (wb). Ending moisture content had no correlation with initial moisture content at the time of baling, but appeared to be related to the amount of fine versus coarse woody material in the bales. Bales of forest and urban woody biomass proved to be structurally stable during long-term storage to enable handling and final transport to a centralized grinding location.

[1]  James H. Dooley,et al.  Conceptual Specification of Forest Utility Balers for Wody Biomass , 2016 .

[2]  Chad M. Hellwinckel,et al.  The updated billion-ton resource assessment , 2014 .

[3]  Han-Sup Han,et al.  Processing and sorting forest residues: Cost, productivity and managerial impacts , 2016 .

[4]  Sang-Kyun Han,et al.  Evaluating the system logistics of a biomass recovery operation in northern California , 2014 .

[5]  Raffaele Spinelli,et al.  Open-Air Drying of Cut and Windrowed Short-Rotation Poplar Stems , 2015, BioEnergy Research.

[6]  Juha Nurmi,et al.  The storage of logging residue for fuel , 1999 .

[7]  William A. Smith,et al.  Practical considerations of moisture in baled biomass feedstocks , 2013 .

[8]  T. Nordfjell,et al.  Fuel quality changes during seasonal storage of compacted logging residues and young trees , 2007 .

[9]  Johanna Routa,et al.  Precision measurement of forest harvesting residue moisture change and dry matter losses by constant weight monitoring , 2015 .

[10]  Reino Pulkki,et al.  Fuel quality changes in full tree logging residue during storage in roadside slash piles in Northwestern Ontario , 2012 .

[11]  Bryce J. Stokes,et al.  Wood recovery with in-woods flailing and chipping , 1990 .

[12]  L. Sikanen,et al.  Validation of prediction models for estimating the moisture content of logging residues during storage , 2016 .

[13]  Bryce J. Stokes,et al.  Transpirational drying and costs for transporting woody biomass - a preliminary review , 1993 .

[14]  J. Laitila.  Performance of a small and a medium sized professional chippers and the impact of storage time on Scots pine (Pinus sylvestris) stem wood chips characteristics , 2015 .

[15]  X. Bi,et al.  Application of a Model to Simulate the Wetting and Drying Processes of Woody Biomass in the Field , 2015 .

[16]  E. Forbes,et al.  Physico-chemical characteristics of eight different biomass fuels and comparison of combustion and emission results in a small scale multi-fuel boiler , 2014 .

[17]  Shahab Sokhansanj,et al.  ECONOMICS OF PRODUCING FUEL PELLETS FROM BIOMASS , 2006 .

[18]  T. Thörnqvist,et al.  The influence of two different handling methods on the moisture content and composition of logging residues. , 2013 .

[19]  Robert J. Ross,et al.  Wood handbook : wood as an engineering material , 2010 .

[20]  John Sessions,et al.  Effect of High Speed Blowing on the Bulk Density of Ground Residues , 2014 .

[21]  Sang-Kyun Han,et al.  Evaluating the System Logistics of a Centralized Biomass Recovery Operation in Northern California , 2016 .

[22]  Tomas Gullberg,et al.  Transport and handling of forest energy bundles—advantages and problems , 2006 .

[23]  Han-Sup Han,et al.  Quality of Feedstock Produced from Sorted Forest Residues , 2016 .

[24]  Glen Murphy,et al.  Economic Optimization of Forest Biomass Processing and Transport in the Pacific Northwest USA , 2015 .

[25]  Matthew H. Langholtz,et al.  2016 Billion-ton report: Advancing domestic resources for a thriving bioeconomy, Volume 1: Economic availability of feedstock , 2016 .

[26]  E. Forbes,et al.  Brash bale production on a clear-felled farm forest and comminution of bales to a biomass energy fuel , 2014 .