Abstract: The invention relates to a concentrate for the effective, environmentally friendly treatment of oil-polluted stretches of ground and the cleaning of oil-contaminated surfaces, said concentrate containing an emulsifier, a vegetable oil and ethanol. The emulsifier is preferably a non-ionic surfactant with an HLB value between 7 and 8. The vegetable oil is preferably selected so that it is liquid at temperatures above 5 DEG C. Oils containing unsaturated fatty acids, in particular germ oils are especially suitable. For its application as a treatment for stretches of ground, the inventive concentrate is diluted with water to form a cleaning solution and is applied to the oil-contaminated surface that is to be treated. The oil is emulsified in the inventive cleaning solution and is detached from the particles of the ground. The oil degrades in a significantly easier manner in the emulsified state. To clean oil-contaminated surfaces, the cleaning solution is sprayed onto the latter.

Abstract: The invention relates to a novel composition and a novel method for the in situ bioremediation of water polluted by hydrocarbons, in particular oil. To remove, for example, an oil slick that is floating on the surface of a body of water, the new composition can be dispersed in powder form over said oil slick. The inventive composition binds spontaneously with the oil, sinking together with the latter below the surface of the water to finally settle as a fine sediment on the bottom. Within a few hours the toxic hydrocarbons have been eliminated from the water, in such a way that in the case of freshwater, drinking-water quality can be restored. The microbiological degradation takes place in situ. The composition contains silicon carbide and/or silicon dioxide in powder form and preferably additives including granite dust, silica-lime dust and calcium. Said new composition permits a simple, cost-effective bioremediation of oil pollution on the surface of bodies of water.