METHOD OF PURIFYING RAW WATER, CONTAINING SUBSTANCES WHICH ARE HARD TO DECOMPOSE Russian patent published in 2009 - IPC C02F1/28 C02F1/44 C02F1/52 C02F1/72 C02F101/36 

FIELD: chemistry.

SUBSTANCE: to purify raw water which contains one or more substances which are hard to decompose, where the said substances can be halogenated dibenzodioxines, halogenated dibenzofurans, polychlorinated biphenyls, substances which damage the endocrine system different from dioxins, carcinogenic substances and organic halogenated compounds, which can be directly removed through photodecomposition or chemical decomposition, the substances which are hard to decompose are concentrated and neutralised on the following stages: (B) adsorption purification stage, (C) membrane filtration purification stage and (D) chemical decomposition of substances which are hard to decompose, adsorbed on an adsorbent using peroxide without desorption from the adsorbent. The preferred version of the method also includes the following stages: (A) membrane concentration, (E) chlorine neutralisation, (F) photodecomposition, (G) back washing the filtration membrane, (H) flocculation separation. The device for realising the methods has the corresponding sections for carrying out the water purification stages. The method is used to purify water which contains a reducing agent, which neutralises free chlorine.

EFFECT: efficient and cheap neutralisation of substances which are hard to decompose in purified water.

22 cl, 9 dwg, 13 ex