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Biomass heating could get a 'green' boost with the help of fungi

Date:
October 19, 2016
Source:
American Chemical Society
Summary:
In colder weather, people have long been warming up around campfires and woodstoves. Lately, this idea of burning wood or other biomass for heat has surged in popularity as an alternative to using fossil fuels. Now scientists report a step toward a "greener" way to generate heat with biomass. Rather than burning it, which releases pollutants, they let fungi break it down to release heat.
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In colder weather, people have long been warming up around campfires and woodstoves. Lately, this idea of burning wood or other biomass for heat has surged in popularity as an alternative to using fossil fuels. Now, in the journal ACS Sustainable Chemistry & Engineering, scientists report a step toward a "greener" way to generate heat with biomass. Rather than burning it, which releases pollutants, they let fungi break it down to release heat.

The benefit of biomass, which consists of plant material and animal waste, is that there is no shortage. It is produced continuously in enormous quantities as a waste product from paper and agricultural industries. But burning it emits fine particles and volatile organic compounds, or VOCs, linked to health and environmental problems. So scientists have been trying to figure out how to use biomass with minimal emissions. One approach involves adding microorganisms that can degrade the materials. In this process, heat is released without giving off fine particles or VOCs. So far, most investigations into this method have involved room-temperature conditions. But for sustained use, these reactions would need to take place at temperatures above ambient conditions as heat is produced. Leire Caizán Juanarena and colleagues wanted to warm things up to see how much heat they could coax out of the process.

The researchers incubated two fungi species that do well in hot climates -- lignin-degrading Phanerochaete chrysosporium and cellulose-degrading Chaetomium thermophilum -- with blocks of birch wood, either sterile or with its natural biota. C. thermophilum produced the most heat (0.63 Watts per kilogram) when degrading wood with its usual microbial inhabitants. To generate enough heat for an average home in the Netherlands, for example, the researchers say they need to determine optimal nutrient, moisture and temperature conditions, as well as other parameters, to increase power production to 6 W/kg.


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Journal Reference:

  1. Leire Caizan Juanarena, Annemiek Ter Heijne, Cees J.N. Buisman, Annemieke van der Wal. Wood degradation by thermotolerant and thermophilic fungi for sustainable heat production. ACS Sustainable Chemistry & Engineering, 2016; DOI: 10.1021/acssuschemeng.6b00914

Cite This Page:

American Chemical Society. "Biomass heating could get a 'green' boost with the help of fungi." ScienceDaily. ScienceDaily, 19 October 2016. <www.sciencedaily.com/releases/2016/10/161019132804.htm>.
American Chemical Society. (2016, October 19). Biomass heating could get a 'green' boost with the help of fungi. ScienceDaily. Retrieved May 22, 2024 from www.sciencedaily.com/releases/2016/10/161019132804.htm
American Chemical Society. "Biomass heating could get a 'green' boost with the help of fungi." ScienceDaily. www.sciencedaily.com/releases/2016/10/161019132804.htm (accessed May 22, 2024).

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