Waste and Debris Collection

By: Lauren McDonnell

Two major sources of urban wood residue are the woody portion of municipal solid waste (MSW) and construction and demolition debris. Of the 62.1 million dry tons of urban wood residues generated annually, about 28.3 million …

Shredding Woody BIomass

Woody biomass that has been shredded at a central processing facility

By B. Jackson, R. Schroeder, and S. Ashton

Shredders are slow-speed rip/shear devices, used widely in tire shredding. Material is pinched between rotating devices and ripped apart or sheared. …

Short Rotation Woody Crops

By: S. Ashton

A stand of fast growing hybrid poplar.

Fast growing short rotation woody crops (SRWC), such as hybrid poplars, willows, and other species, are specifically grown to be an energy feedstock. The species of trees are often chosen …

Timber Harvest Residues

By: S. Ashton

Harvesting residues from Southeastern forestland.

Residues from forest harvesting operations include logging residues (i.e. branches, tops, and stumps) left on-site, low-quality commercially grown trees, dead wood, and other noncommercial tree species. Other residues include wood that has …

Two-pass Woody Biomass Harvesting Operations

Jump’s modified forwarder moving concentration of slash.

Case Study 1: Two-pass

One California landowning company developed a two-pass removal system in a sawtimber/biomass harvest that optimized equipment utilization and transportation logistics. In one district, Sierra Pacific Industries typically divides operations …

Concerns Over Greenhouse Gases

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Wood, coal, oil and natural gas are all made of carbon-based compounds. Burning these feedstocks releases carbon, which then becomes carbon dioxide, a major greenhouse gas. The big difference between wood and fossil fuels is that the carbon released by …

Bundling Woody Biomass

John Deere 1490D Slash Bundler

By B. Jackson, EL. Taylor, R. Schroeder, and S. Ashton

One recent innovation involves the compaction of logging residues into cylindrical bales called composite residue logs (CRL) or biomass bundles (Johansson et al, 2006). CRLs …

Chipping Woody Biomass

B. Jackson, R. Schroeder, S. Ashton, and EL Taylor

Chippers are machines that cut material with a slicing action. They make up most of the woody biomass size-reduction equipment in use today and are characterized by high output, high speed …

Water Quality and Quantity

by Diomy Zamora and Charlie Blinn

Water is a universal resource that sustains life and is integral to maintaining productivity of the land. Biomass harvesting and utilization for energy can affect water quality and quantity. Water quantity is the timing …