FIELD: process engineering.
SUBSTANCE: invention can be used for purification of natural waters at production of drinking water. Clarification is made by forcing water through the layer of foam bricks or foamed polystyrene while filtration is performed by forcing this water through quartz sand with grain size of 0.3-1.5 mm and gravel of 2-32 mm grains. Sorption is made on granulated activated carbon with grain size of 0.5-5 mm to decontaminate initial water by primary chlorination with sodium hypochlorite containing up to 19% of active chlorine in amount of 0.9-1.3 mg/l. Then, water is processed by polarisation current of carbon-graphite electrode self-organisation in aluminium oxyhydrate medium for 50 minutes and by aluminium sulphate in amount of 1.8-2.5 mg/l and flocculating agent POLYDADMAX, series FLOQUAT FL 45 in amount of 0.1-0.4 mg/l. Now, secondary chlorination is performed by sodium hypochlorite containing up to 19% of active chlorine in amount of 3-5 mg/l.
EFFECT: higher efficiency of purification and quality of drinking water, non-polluting process.
1 dwg, 2 tbl
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Authors
Dates
2014-07-20—Published
2012-09-13—Filed