Biological activity of soil contaminated by biodiesel

The aim of the research was to evaluate the influence of biodiesel on the microorganisms biomass and dehydrogenase activity. Biodiesel was introduced into the soil at a concentration of 1.5 and 10%. The influence of biofuel on the amount of biomass of living microorganisms was various and depended on the dose which was used. Stimulation of dehydrogenases activity was observed in 1% dose of biodiesel (about 60-300% higher than the values in non-contaminated soil). Higher doses, within a longer period of time, had a negative influence on microorganisms (reduction of their activity up to 35-92% compared to the control).