Evaluation of biomass conversion technologies: new publication released

We recently completed work on the Waste to Wisdom project that examined the entire supply chain of converting forest waste residues into bioenergy and wood products. The Center’s role was to evaluate equipment that produces biochar, torrefied biomass, electricity, or densified wood briquettes using forest residues as the input feedstock. Collaborators from Humboldt State’s Forestry Department analyzed the upstream collection of forest biomass, and experts from the U.S. Forest Service conducted a lifecycle assessment and economic analysis of the supply chain.

SEM biochar image

SEM biochar image (taken at the HSU CNRS Core Facility)


Data collected by the Schatz Center during field tests of biomass conversion equipment were used to:

  • identify optimal process conditions,
  • specify feedstock limitations,
  • measure emissions,
  • evaluate product quality, and
  • recommend design improvements to equipment manufacturers.

Results and conclusions from the entire project are presented in a special issue of Applied Engineering for Agriculture, published in February 2018. Four principal investigators, including Schatz Center Director Arne Jacobson, summarized the project’s objectives and major conclusions in the introduction article to the special issue. Engineers from Schatz authored four papers, on biochar production, torrefaction and briquetting, and gasification of forest residues:

Collaborators at the U.S. Forest Service and the Consortium for Research and Renewable Industrial Materials (CORRIM) used the results collected from testing activities to conduct economic and environmental life cycle analyses of biomass conversion technologies. Field measurements from the Waste to Wisdom project will also be included in our current California Biopower Impacts project, which is evaluating the environmental impacts associated with utilization of forest-derived woody biomass for electricity generation.

This work could not have been completed without close collaboration between our primary industry partners: Biochar Solutions, Inc., Norris Thermal Technologies, and Pellet Fuels Institute, who provided the testing equipment. Other partners that provided key support include the Green Diamond Resource Company, the Redwood Forest Foundation, Inc. (RFFI), All Power Labs, Bear Mountain Forest Products, Colorado Biochar Resources, Pueblo Wood Products, California Redwood Company, North Coast Air Quality Management District, RUF Briquetting Systems, and OMNI Test Labs.

Stack of three briquettes; different colors represent combinations of temperature and time.
Forest residues were converted into torrefied briquettes in the demonstration-scale torrefaction plant. The perceptible differences in color and density reflect combinations of reaction temperature and residence time.

SFSS lecture this Thursday (2/22): Do wind turbines make good neighbors?

In this week’s Sustainable Futures Speaker Series, energy researcher Joseph Rand shares results from a nationwide survey of people who live in proximity to wind farms. Wind power now supplies over 6% of the nation’s electricity demand, with over 60,000 turbines installed across the country. Which factors create community opposition or support for wind farm development?

Joseph Rand is a research affiliate in the Electricity Markets & Policy Group at Lawrence Berkeley National Lab, and holds a MS in Energy and Resources from UC Berkeley and a BA in Environmental Studies from Macalester College. He conducts research and analysis on renewable energy, including cost and market analysis, spatial data analysis, and research related to public acceptance and deployment barriers of renewable energy.

Joseph Rand, headshot

The Sustainable Futures Speaker Series at Humboldt State creates interdisciplinary discussion, debate, and collaboration around issues related to energy, the environment, and society. Lectures are held on Thursdays from 5:30-7 pm in HSU Founders Hall 118. For details on upcoming events or to request accessibility accommodations, visit our series events page or call (707) 826-4345.

Sustainable Futures Speaker Series: Spring 2018

This spring’s Sustainable Futures Speaker Series features nine talks on topics ranging from wind turbines to Icelandic glaciers, microgrids to traditional forestry practices, cannabis policy to tanoak restoration, the legal personhood of rivers to climate change in redwood ecologies, and the implications of clean energy access for human health. Events are held on Thursdays from 5:30-7:00 pm in Founders Hall 118 on the Humboldt State University campus.

This interdisciplinary speaker series is intended to stimulate cross disciplinary discussion, debate, and collaboration around issues related to energy, the environment, and society. The series is sponsored by the Schatz Center, the Environment & Community Graduate Program, and the College of Arts, Humanities and Social Sciences at Humboldt State.

For details on upcoming events or to request accessibility accommodations, please email or call the Schatz Center at (707) 826-4345.

Spring 2018 Season Poster

Energy Adoption Patterns in Uganda: Final Blog

In 2017, we worked with UNCDF’s CleanStart Programme in partnership with SolarAid/Acumen, to evaluate the impact of pay-as-you-go purchase opportunities for small solar systems in Uganda.

Here’s the third and final installment of our blog series, with some initial findings:

Read our previous blogs: