Green Options

Needed is fuel from wood and waste, not food and haste. Some of the world’s best minds are focused on fuel from cellulosic and waste sources, in some cases from biological sources that remove CO2 from the air and enrich depleted soil. I am writing this article from the 31st Symposium on Biotechnology for Fuels and Chemicals sponsored by NREL. 800 global bioscientists have gathered in San Francisco to share their research and showcase their progress. Many at the conference [...]

The 31st Symposium on Biotechnology for Fuels and Chemicals

One of the world’s most prestigious and established biofuels meetings, the 31st Symposium on Biotechnology for Fuels and Chemicals, is currently underway May 3-6 in San Francisco, with more than 800 scientists expected to attend sessions on topics ranging from commercialization of biofuels and their long-term sustainability to emerging technologies and turning algae into fuel.

We’re liveblogging (on Twitter) [...]

We must transition from fuel from food and haste to fuels from wood and waste. Although the economics do not yet favor major production, pilot plants are taking wood and paper waste and converting it to fuel. Other cellulosic material is even more promising. Some grasses , energy crops, and hybrid poplar trees promise zero-emission fuel sources. These plants absorb CO2 and sequester it in the soil with their deep root systems.

Alan Novak, Director of Alternative Fuels for Emerson Process Management and host of at least three BioEnergy Summits throughout the country, is optimistic for the future of advanced biofuels in meeting the nation and the world’s future transportation fuel needs.

It is well-known, of course, that the rich and their descendants will be completely immune to the effects of climate change. Thus, many of them have been driving efficiency-challenged cars that carelessly drain the last of the world’s oil, making their carbon footprint heavier than that of lesser beings.

So, from a climate-change point of view, who better to target with the security of their own driveway supply to power their gas guzzlers — from a carbon free fuel in place of oil? The I’ve got mine crowd.

Everyone who drives gas guzzlers could recoup the cost in a bit over a year. How?

Because this home ethanol distillation unit-cum-driveway pump invented by the Los Gatos company E-Fueler can distill ethanol from a nearly free feed stock; waste alcohol from vineyards or restaurants.

If non-food cellulosic ethanol — “celluline” — is the future of sustainable biofuels, what are the best non-food crops to use to make it?

In a new study, researchers have shown that growing perennial grasses to make celluline rather than using corn stover or sugar cane is better for the environment because it increases soil health and stores much more carbon in the soil, thereby reducing greenhouse gases.

Current first generation ethanol is produced by fermenting the starch in corn kernels. This has become a controversial source of biofuel due to food vs. fuel concerns and the relatively low energy gain from the whole process.

But celluline represents a true departure from these concerns in that significantly more liquid fuel energy can be harvested from non-food portions of the plant — the stems and leaves. Celluline is still in the research and development stage, but many people have hung their hats on it as the holy grail that will replace corn ethanol and bypass concerns over food vs. fuel and energy gains (PDF).

Tom Vilsack — former two-term Governor of Iowa, strong biofuels supporter, and former democratic candidate for president himself — has been leaked as President-elect Obama’s frontrunner for Agriculture Secretary.

From a biofuels standpoint, the choice of Vilsack would be a clear indication of the direction an Obama administration would likely take. As a political leader from a corn farming state, Vilsack has shown strong allegiances with the corn ethanol industry in the past and has been an outspoken advocate of alternative energy.

When the only factor that determined if farms lived or died was the price of food, farm income was rather boringly steady. Now that biofuels have given agriculture a value greater than staple food crops, farmers have seen some huge rewards. But with those rewards have come greatly increased risks — risks that farmers are finding out the hard way right now.

In what could be a major breakthrough for second generation ethanol production, German researchers have developed a new method that easily converts raw wood into sugar using a liquid ionic salt bath at room temperature followed by reaction with a solid acid resin.

The process works by chopping the complex raw wood molecules into smaller and simpler bits — the end product being single sugar molecules. The method can also be used on other second generation ethanol feedstocks such as grass straw. Once you’ve made the sugar, the rest of the process of making ethanol is as simple as making beer — literally.

In a new report, the Renewable Fuels Association (RFA) says the events of recent months clearly indicate that production of corn ethanol is not a major driving factor behind the continued high food prices at the supermarket.

In the report, “Will the Plunge in Grain Prices Mean Lower Food Prices at the Supermarket?,” the RFA points out that, while prices for agricultural staple commodities such as corn, wheat, and soybeans have all plummeted by about 50% in the last half year, food prices at the grocery store have remained highly elevated. At the same time, ethanol production has dramatically increased.

When the above factors are taken together, the link between grocery store food prices and corn ethanol production becomes dubious. Not only that, and also somewhat unintuitively, it seems that the diversion of relatively large portions of the US corn crop to ethanol production has very little effect on even the market price of corn.

Researchers at the University of Florida are reporting that the enzymes in the guts of termites could provide a powerful tool for making ethanol from non-food woody plants.

In an upcoming review paper, professor Michael Scharf details how termites — which cause hundreds of millions of dollars in damage to houses in the US alone each year — might actually prove useful for something that most people could never have envisioned.

Through millions of years of evolution, termites have filled a niche in the animal world that takes precise chemical coordination between the digestive enzymes and microbes in their guts to turn the wood that they eat into sugars which can then be used to “fuel” the termite.

It is this seemingly easy transformation of wood into sugar in the termite guts that holds the promise for future ethanol production, because, once you have the sugar, it’s easy to make ethanol through fermentation.