Low-temperature bioremediation of a waste water contaminated with anionic surfactants and fuel oil.
We conducted a laboratory study at 10 degrees C on the biological decontamination of the waste water from a garage and car-wash that was contaminated with anionic surfactants (57 mg 1(-1)) and fuel oil (184 mg hydrocarbons 1(-1)). The indigenous microorganisms degraded both contaminants efficiently after biostimulation by an inorganic nutrient supply. After 7 days at 10 degrees C, the residual contaminations were 11 mg anionic surfactants 1(-1) and 26 mg hydrocarbons 1(-1). After 35 days, only the anionic surfactants had been further reduced to 3 mg 1(-1). Bioaugmentation of the unfertilized waste water with a cold-adapted inoculum, able to degrade both hydrocarbons (diesel oil) and anionic surfactants (sodium dodecyl sulphate), resulted in a significant increase of the hydrocarbon biodegradation during the first 3 days of decontamination, whereas biodegradation of anionic surfactants was inhibited during the first 21 days following inoculation. Bioaugmentation of the nutrient-amended waste water was without any effect.
Margesin
R
R
Institute of Microbiology, University of Innsbruck, Austria. rosa.margesin@uibk.ac.at
Schinner
F
F
D001673:Biodegradation, Environmental; D005648:Fuel Oils; D013501:Surface-Active Agents / Q000378:metabolism*; D013696:Temperature; D013997:Time Factors; D014877:Water Pollution, Chemical
D005648:Fuel Oils; D013501:Surface-Active Agents