$1 million fund to develop algae biofuels

A research team from Lawrence Livermore National Laboratory, a multi-program US security laboratory, has received an additional $1 million (appr. €907,000) to protect algal crops by developing ‘probiotic’ bacteria to combat pond infestation and increase ecosystem function and resilience.

Algal biomass can be converted to advanced biofuels that offer promising alternatives to petroleum-based diesel and jet fuels. 

Annual productivity is a key metric for algal biofuel production that, if optimised, could significantly decrease and stabilise biofuel price per gallon.

Since grazers can result in a 30% loss in annual biomass productivity, a consistent mechanism for preventing predators will increase productivity and in turn decrease biofuel cost per gallon.

‘We are only just beginning to understand that the pond microbiome is not only an indicator of health but also a tool for crop protection,’ says Rhona Stuart, one of the team members from LLNL.

The goal of the project is to identify and employ ‘probiotic’ bacteria to increase microalgal survival by two-fold when under attack by rotifers or chytrids in mass algal cultures.

Rotifers and chytrids, multicelled animals with less than 1,000 cells, are common culprits of algae loss, as they consume algal crops.

By using probiotic bacteria to increase algal resistance against these grazers, the team estimates at minimum a 5% to 10% increase in annual productivity.

The proposed tool has several advantages over the baseline, including minimal risk of pest evolution, tailored microbiome diversity to increase ecosystem resilience and productivity, and probiotics that can increase algal productivity and outgrow pests.

The proposed work also will contribute to overcoming the barrier that exists in translating laboratory success to open pond success by developing methodologies for translating microbiome work from bench scale to process development.

The team is led by Michael Thelen of LLNL and other participating institutions are Heliae Development, LLC, Sandia National Laboratories, UC Davis, and DOE’s Joint Genome Institute.

Other members of the LLNL team are Rhona Stuart and Xavier Mayali.

The funding came from the Department of Energy’s Office of Energy Efficiency and Renewable Energy.