FIELD: water treatment.
SUBSTANCE: invention can be used in water treatment for preliminary purification of drinking water, circulating, industrial and household wastewater, during dehydration of sediments. In order to carry out the method successively, wastewater is treated from coarse waste, from coarse suspended substances – in sand trap (7), from medium-dispersed suspended substances and from part of pathogenic bacteria – in primary settlers (12), from finely dispersed suspended substances and soluble impurities – in aerotanks (16); from fine impurities, sludge flakes and from part of pathogenic bacteria – in secondary settlers (20); from remaining pathogenic bacteria – in ultraviolet disinfection unit. Sludge sites (32) are used to dehydrate and disinfect the formed sediment, as well as to decontaminate drainage waters to be separated from dehydrated residue. In primary settlers (12), in secondary settlers (20), as well as at sludge areas (32), traveling acoustic and acoustic waves of acoustic and ultrasonic frequency bands are emitted with amplitude of acoustic pressure of not less than 104 Pa at 1 m from working surface of corresponding hydroacoustic radiator (40,48,56). Action of the emitters provides acoustic degassing, coagulation and deposition of suspended substances, compaction of sediment, disinfection of water and sediment. Purified and decontaminated wastewater is directed into a natural watercourse, and dehydrated and disinfected sediment is transported for further use, processing or recycling.
EFFECT: method provides high-quality, reagentless purification of large volumes of water and sediment dehydration with complete environmental safety for the environment, and also increases efficiency of production of mining industry during ore dressing.
1 cl, 11 dwg, 1 ex
