The research and development of biofuels is beginning to attract investment from large international companies, including those traditionally associated with their fossil fuel predecessors.

A series of news articles published inNatureevaluate recent shifts in interest and investment injatrophaandalgaeas biofuel feedstocks, as well as techniques to producecellulosic ethanolandliquid fueldirectly from biomass (content requires subscription or payment).

With theannouncementthis summer that BP had pulled out of a $160 million joint venture with D1 oils to accelerate the cultivation ofJatropha curcus, the prospect of further large scale investment in the shrub as a biofuel feedstock faded.

Due to its ability to grow on land unsuitable for agriculture, cultivating jatropha was previously touted as a way of avoiding competition for resources with food crops. However, a recent controversialstudysuggests that jatropha requires much more water than other prospective bioenergy crops.

Despite falling investment in jatropha over the last year, various remaining projects suggest that the crop could still play a role in meeting future sustainable energy needs. Their scope is broad ranging, fromgenetic research发展高产种子菌株,toinitiativesoperating on a local scale which incentivise farmers to cultivate jatropha alongside existing crops. A novel method ofjatropha oil transesterificationfor use in biodiesel synthesis was reported inBiotechnology for Biofuelsearlier this year.

While interest and investment in Jatropha has waned, algal biofuels have emerged very quickly as perhaps the most promising source of biofuel for the future. The willingness of oil companies to invest was punctuated by the announcement in July thatExxonMobilwould join J. Craig Venter’sSynthetic Genomics Inc.in a project (potentially worth $600-million) attempting to up-scale the production of biofuels from algae (see our previous blog posthere).BP&Chevron
have also invested inMartek BiosciencesandNRELrespectively.

The potential benefits of algae as a ‘green’ source of energy are several fold; they can be cultured using land and water unsuitable for agriculture, and consume carbon dioxide during photosynthetic growth. Scientific advance in algal biofuel technology is difficult to gauge, however, as private companies withhold their research from peer review and publication.

In comparison to algae, the uptake from companies expected to be involved in the commercialization of cellulosic ethanol production (the conversion of agricultural residues and municipal waste into useful fuel), has been slow. Fewer investments than initially expected have been secured, due in part to the economic downturn and previous financial losses in maize ethanol.

This has resulted in an increased focus on the reduction of production costs; increasing the efficiency offungal enzymesused in ethanol production and using engineered microorganisms that convert cellulosedirectly to ethanolare two approaches currently being explored. Attention has also turned to crops and industrial process by-products not previously considered or grown for use as feedstocks in bioethanol production. Research published inBiotechnology for Biofuelslooks atspent grainfrom the brewing process, and blemishedwatermelonsdiscarded from the annual crop. In time, fuels derived from biomass which replicate the hydrocarbon fuels in use today might prove more attractive to investors than bioethanol. The technology to convert biomass to liquid fuel in this way is in its infancy, however the benefits of the approach include the generation of fuel products that would be tailored for the existing petrol-focused infrastructure. In 2008, Virunt and investor Royal Dutch Shell announced plans to develop technology forconverting plant sugarsinto hydrocarbons similar to those produced at petroleum refineries, and other companies includingChevronandVolkswagenhave also invested in projects to develop biomass to liquid fuel technology.

Biotechnology for Biofuelswelcomes high-quality studies describing technological and operational advances in the above production techniques, as well as others covered by the journalscope.

You canbrowseorsearchpublished articles, orsubmit your manuscriptfor consideration, online.

Gerbens-Leenes, W., Hoekstra, A., & van der Meer, T. (2009). The water footprint of bioenergyProceedings of the National Academy of Sciences, 106(25), 10219-10223 DOI:10.1073/pnas.0812619106

Kumari, A., Mahapatra, P., Garlapati, V., & Banerjee, R. (2009). Enzymatic transesterification of Jatropha oilBiotechnology for Biofuels, 2(1) DOI:10.1186/1754-6834-2-1

Xiros, C., & Christakopoulos, P. (2009). Enhanced ethanol production from brewer’s spent grain by a Fusarium oxysporum consolidated systemBiotechnology for Biofuels, 2(4) DOI:10.1186/1754-6834-2-4

Fish, W., Bruton, B., & Russo, V. (2009). Watermelon juice: a promising feedstock supplement, diluent, and nitrogen supplement for ethanol biofuel productionBiotechnology for Biofuels, 2(18) DOI:10.1186/1754-6834-2-18