Cellulosic biofuels can benefit the environment if managed correctly

June 29, 2017

Could cellulosic biofuels - or liquid energy derived from grasses and wood - become a green fuel of the future, providing an environmentally sustainable way of meeting energy needs? In Science, researchers at the U.S. Department of Energy-funded Great Lakes Bioenergy Research Center say yes, but with a few important caveats.

"The climate benefit of cellulosic biofuels is actually much greater than was originally thought," said Phil Robertson, University Distinguished Professor of Ecosystem Science at Michigan State University and lead author on the study. "But that benefit depends crucially on several different factors, all of which we need to understand to get right."

Although not yet a market force, cellulosic biofuels are routinely factored into future climate mitigation scenarios because of their potential to both displace petroleum use and mitigate greenhouse gas emissions. Those benefits, however, are complicated by the need for vast amounts of land to produce cellulosic biofuels on a large scale.

"The sustainability question is largely about the impact of using millions of acres of U.S. land to grow biofuel crops," Robertson said. "Can we do that without threatening global food security, diminishing biodiversity, or reducing groundwater supplies? How much more fertilizer would we use? What are the tradeoffs for real climate benefit, and are there synergies we can promote?"

Drawing from ten years of empirical research, Robertson and GLBRC colleagues from MSU, the University of Wisconsin and the University of Maryland identify several emerging principles for managing the complex environmental tradeoffs of cellulosic biofuel.

First, the researchers show how growing native perennial species on marginal lands -land not used for food production because of low fertility or other reasons - avoids competition with food security, and provides the greatest potential for climate mitigation and biodiversity benefits.

Second, crop choice is key. Native perennial species offer superior environmental outcomes to annual crops, but no single crop appears to be ideal for all locations. In fact, in some cases mixed species crops provide superior benefits. Third, nitrogen fertilizer use should be avoided or minimized because of its global warming and other environmental impacts.

According to the researchers, these principles (as well as four more outlined in the paper) are enough to begin guiding sound policy decisions for producing sustainable biofuels. Looking forward, however, the team calls for more research on designing landscapes to provide the optimal suite of energy, climate and environmental benefits. They say that understanding how best to integrate benefits and tradeoffs will be key to the future success of cellulosic biofuels.

"With biofuels, the stakes are high," Robertson said. "But the returns are also high, and if we take key principles into account we can begin shaping the policies and practices that could help make cellulosic biofuels a triple win for the economy, the climate and for environmental sustainability in general."
Additional GLBRC scientists contributing to this paper include Bradford Barham, Bruce Dale, Stephen Hamilton, Cesar Izaurralde, Randall Jackson, Douglas Landis, Scott Swinton, Kurt Thelen and James Tiedje.

Michigan State University

Related Biofuels Articles from Brightsurf:

Making biofuels cheaper by putting plants to work
One strategy to make biofuels more competitive is to make plants do some of the work themselves.

How to make it easier to turn plant waste into biofuels
Researchers have developed a new process that could make it much cheaper to produce biofuels such as ethanol from plant waste and reduce reliance on fossil fuels.

Barriers and opportunities in renewable biofuels production
Researchers at Chalmers University of Technology, Sweden, have identified two main challenges for renewable biofuel production from cheap sources.

How biofuels from plant fibers could combat global warming
A study from Colorado State University finds new promise for biofuels produced from switchgrass, a non-edible native grass that grows in many parts of North America.

Calculating the CO2 emissions of biofuels is not enough
A new EU regulation aims to shrink the environmental footprint of biofuels starting in 2021.

Algae cultivation technique could advance biofuels
Washington State University researchers have developed a way to grow algae more efficiently -- in days instead of weeks -- and make the algae more viable for several industries, including biofuels.

Cutting the cost of ethanol, other biofuels and gasoline
Biofuels like the ethanol in US gasoline could get cheaper thanks to experts at Rutgers University-New Brunswick and Michigan State University.

Cellulosic biofuels can benefit the environment if managed correctly
Could cellulosic biofuels -- or liquid energy derived from grasses and wood -- become a green fuel of the future, providing an environmentally sustainable way of meeting energy needs?

Making oil from algae -- towards more efficient biofuels
The mechanism behind oil synthesis within microalgae cells has been revealed by a Japanese research team.

WSU study finds people willing to pay more for new biofuels
When it comes to second generation biofuels, Washington State University research shows that consumers are willing to pay a premium of approximately 11 percent over conventional fuel.

Read More: Biofuels News and Biofuels Current Events
Brightsurf.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com.