METHOD OF PURIFICATION OF CONCENTRATED WASTE WATERS Russian patent published in 2005 - IPC

FIELD: chemical industry; petrochemical industry; bio-engineering; methods of purification of the concentrated waste waters.

SUBSTANCE: the invention is pertaining to bio-engineering, in particular, to purification of the concentrated waste waters and may be used in chemical and petrochemical industries. The method of purification of the concentrated waste water containing aromatic hydrocarbons and their derivatives, peroxides and aldehydes, includes an aerobic treatment with strains of bacteria Pseudomonas sp. VCPV-3893 and Rhodococcus sp. VCLMV-3892. At that before the stage of the aerobic treatment carry out a preliminary purification of the waste waters by a consecutive stages of treatment of the waste waters with an alkaline solution up to the pH value of no less than 9.5. Then conduct the further distillation of the treated flow at the temperature of the bottom distillation residue of the column of no less than 98°C and the duration of presence of no less than 0.2 hour. At that the bottom distillation residue of the column is directed to the stage of the aerobic treatment and the upper product of the column is directed to utilization. The method allows to purify effectively the concentrated waste waters containing aromatic hydrocarbons and their derivatives, and also peroxides and aldehydes.

EFFECT: the invention ensures effective purification of the concentrated waste waters containing aromatic hydrocarbons, their derivatives, peroxides and aldehydes.

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