Can algae grow in biodiesel?
There are many microbes, including algae and fungi that will use hydrocarbons as a food source. This is a common problem with petroleum-based fuels and has been noted with biodiesel, as well.. In order to grow, the microbes need water. The solubility of water in diesel fuel is very low, so if water is present it settles as a layer at the bottom of the fuel tank. The microbes tend to grow at the interface between the water and the fuel. The best way to control the growth of the microbes is to eliminate the water by draining the fuel tanks frequently and using desiccants on the vent lines. Chemical biocides can be used to prevent the growth of the microbes and at higher concentrations can be used to kill existing infestations. However, the preferred solution is to implement good house-keeping practices that will prevent water from collecting at the bottom of the fuel tank.
