Reducing Biofuel Conflict

Something that usually pops into my head whenever I hear people expressing concern on the issue of food supplies being put at risk by biofuel production is that that doesn't necessarily have to be the case. Yes, one of the best ways to get high yields of biofuels from a process is to use the part of the plant that actually produces food (such as using corn kernels in fermentation for ethanol). And sure, there is a risk of land that would have been used for food being used to grow biofuel crops. But this issue isn't so much a matter of one or the other as such arguments seem to believe. Biofuels can be produced from a wide variety of sources, which often includes by-products of food production, meaning that both food and fuel can be produced from a single harvest instead of having to be selective about which one should be given precedence.

A good example of how biofuels and food can be produced at the same time, instead of competitively, is corn. While the kernels are almost ubiquitous in our diet now, running from direct ingestion of corn to its use as feed for meat animals, a large portion of the corn plant doesn't get eaten- or used for other applications, for that matter. The stalk, the leaves, the corn silk, and the cob that the kernels are attached to are not able to be digested by the human system, or various other biological systems, due to the cellulose content (which, for that matter, the kernels have a fair amount as well). Cellulose, commonly known as plant fiber, is what makes up a majority of the mass of plants, and has recently been subject to R&D to make it economically viable for a biofuel feedstock. The reason it was not already used as such (no, not lack of foresight) was the fact that cellulose is difficult to break down in general. It is only with recent developments in enzymatic chemistry that such production is able to begin on a large scale- in fact, this article from a few days ago is about the first biocrude startup to successfully begin large scale production "at scale, at parity", and apparently to the great surprise of skeptics since it was done on time, at scale, and within budget. This plant seems to specialize in wood biomass, but I wouldn't be surprised if it could process other sources of cellulose as well.

Another aspect of non-conflict is the fact that many plants have been found that can be used for biofuel production that can be planted on marginal or non-arable land. This type of terrain includes nutrient-poor and dry soils, as well as muddy grounds that are difficult to plant and cultivate, and areas with a troublesome hardpan layer. Some plants are even capable of changing the conditions of the land to make it easier for other plants to grow, such as the wild radish, which is able to break up hardpan layers beneath the topsoil. “The crop matures in 80 days from planting, is cold-tolerant and can be grown without interfering with normal crop rotations... It’s not an earth-shattering oilseed crop. It produces no meal but can be viewed as an organic fertilizer.” It is also able to provide forage for wild animals that might otherwise consume more important crops. This combination of passive utilitarian aspects and an extra use as an oil crop makes it seem very useful and important to my perspective. There is also the plant known as "jatropha, a tropical plant that is resistant to drought and pests and produces seeds containing up to 40 percent oil. 'It can’t take a bad freeze and needs dry roots,' Breitenbeck said. 'But it produces seed in about two years.'" This plant seems to me like something that could be used to try and reverse desertification. While I have no doubt that it would be a slow process, if it could at least halt the advance of the process, it could prove invaluable to the long term survival of certain environments that are at risk of becoming arid wastelands. And if it can help with the fuel problem in the process, than it seems capable of killing two birds with one stone.

I was mentioning in my last post a company called Bluefire, which takes waste streams from dumps and is able to produce fuel sources from them, such as methane given off by decomposition of organic waste in dumps and sources of cellulose that can be converted to biofuels. But there are more ways that waste products can be used. I already mentioned the use of corn stover (the usually unused parts) for cellulose, but there are other waste streams that can be used. For example, soy oil was originally a byproduct of making meal from the soybeans, but with the advent of biofuels, "as demand changed, the oil became the primary product and meal became secondary." The oil could be used to make biodiesel with an esterification of lipids, which are present in many plants and animals. While may seem rather morbid, cast off quantities of fats from animal sources are viable sources of stock for the production of biodiesel.

I'm sure that there are other ways that various waste streams could be used as well. But ultimately, I guess the lesson that should be taken from this is one that was a way of life in the past. The native tribes of North America all followed this practice, and we should probably try to find a way to incorporate it into our lives again, from individuals to companies (practically, of course). That is the practice of using all parts of something that has to be killed to provide for our needs. While I am sure that this becomes harder to do as it gets applied at a larger scale, if we can find a way to make it a point during production, it would probably help solve a variety of our problems, besides just alleviating streams of waste.