METHOD OF PURIFICATION OF THE NATURAL AND WASTE WATERS BY FILTRATION Russian patent published in 2007 - IPC C02F1/74 B01J20/04 B01D39/14 C02F103/02 

FIELD: mining industry; hydrometallurgy; environmental protection; methods of purification of the natural, recirculated waters and the industrial waste waters.

SUBSTANCE: the invention is pertaining to the field of purification of the natural, recirculated waters and the industrial waste waters, predominantly, from iron, manganese, the ions of the heavy metals and the organic impurities and may be used in some processes of the ores dressing and in hydrometallurgy. The method provides for mixing of the subjected to the purification waste water with the sorbent, the subsequent feeding of the mixture in the layer of the granular loading till pollution of the former, suspension of the filtration process, delivery of the washing water in the direction of expansion of the layer of the granular loading till its cleansing from the pollutions, intermixing of the sorbent with the part of the delivered cleansing water, feeding of the given mixture into the expanded layer of the granular loading, the extinction of the cleansing and resumption of the filtration process. The being purified water or its mixture with the sorbent before feeding into the layer of the granular loading is aerated and-or it is introduced with another oxidizing substance. As the granular loading or its the most remote part in the downstream of the filtration they use the crushed psilomelan, and as the sorbent - the crushed brucite. The method ensures the increased efficiency of the filtration and reduction of the waste water purification cost due to reduced consumption of the sorbent and the cleansing water.

EFFECT: the invention ensures the increased efficiency of the waste water filtration, the reduced consumption of the sorbent and the cleansing water, reduction of the waste water purification cost.

4 cl