PURIFYING METHOD OF SOIL AND GROUND Russian patent published in 2008 - IPC B09C1/04 C02F11/02 

FIELD: mining engineering.

SUBSTANCE: for method fulfillment one mixes contaminated soil and ground with water, adds in appeared pulp reagent and conducts flotation processing of this pulp with its following separation on contaminations in form of chambered product. As reagent one uses terrestrial peat and non-float microorganisms biomass and products of its physical and chemical processing as intracellular elements in relation terrestrial peat:biomass and products of its processing correspondingly from 1:0.1 to 1:0.8 and at that relation of biomass: intracellular elements is from 1:0.2 to 1:1. Reagent dose makes 1-5% mass, of soil and ground solid matter. Biomass processing is made with the help of heating at the temperature of 60-90°C, pH 8-12 during 0.5-2.0 hours. Received purified soil and ground contain contaminations in quantity no more than admissible concentration limits in ground, in particular as to oil products are no more than 0.1 mg/kg.

EFFECT: received result far exceeds analogous figures according known method.

3 cl, 3 ex