US 12,234,170 B2
Method of purifying natural water and wastewater
Igor Semenovich Balaev, Moscow (RU)
Assigned to Igor Malykhin Moro, Benalmadena (ES)
Appl. No. 17/310,472
Filed by Igor Malykhin Moro, Benalmadena (ES)
PCT Filed Jul. 31, 2019, PCT No. PCT/RU2019/000536
§ 371(c)(1), (2) Date Aug. 5, 2021,
PCT Pub. No. WO2020/222670, PCT Pub. Date Nov. 5, 2020.
Claims priority of application No. RU2019113558 (RU), filed on Apr. 29, 2019.
Prior Publication US 2022/0127175 A1, Apr. 28, 2022
Int. Cl. C02F 9/00 (2023.01); B01D 24/18 (2006.01); B01D 24/46 (2006.01); B01D 39/04 (2006.01); C02F 1/00 (2023.01); C02F 1/28 (2023.01); C02F 1/38 (2023.01); C02F 1/50 (2023.01); C02F 1/52 (2023.01); C02F 1/76 (2023.01); C02F 101/32 (2006.01); C02F 103/00 (2006.01); C02F 103/10 (2006.01); C02F 103/36 (2006.01)
CPC C02F 9/00 (2013.01) [B01D 24/186 (2013.01); B01D 24/4631 (2013.01); B01D 39/04 (2013.01); B01D 2239/1241 (2013.01); B01D 2239/1291 (2013.01); C02F 1/001 (2013.01); C02F 1/283 (2013.01); C02F 1/38 (2013.01); C02F 1/50 (2013.01); C02F 1/5245 (2013.01); C02F 1/5281 (2013.01); C02F 1/76 (2013.01); C02F 2101/32 (2013.01); C02F 2103/007 (2013.01); C02F 2103/10 (2013.01); C02F 2103/365 (2013.01); C02F 2209/40 (2013.01); C02F 2303/16 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A method for treating a feedwater comprising natural water or waste water, the method including the following treatment stages:
adding an oxidizing agent to the feedwater,
mixing of the feedwater with a coagulant,
flocculation of the feedwater in a pressure flocculation reactor made in the form of a vertical vessel during 2 and up to 30 minutes,
adding a flocculant to the feedwater after the flocculation in the pressure flocculation reactor,
filtering the feedwater through a moving granular bed in a moving granular bed pressure clarifying filter to produce a filtered water, and
disinfection of the filtered water with sodium hypochlorite,
wherein the moving granular bed in the moving granular bed pressure clarifying filter has a single layer or two layers of polymer granules with a granule size in a range of 1-20 mm and a density of granules in a range of 0.3-0.98 g/cm3, and a height of the moving granular bed is in a range 0.5-2.5 m,
wherein the feedwater with a temperature above 10° C. flows downward through the pressure flocculation reactor,
wherein the feedwater with a temperature below 10° C., as well as low turbid and deep color water flow upward through the pressure flocculation reactor,
wherein a demulsifier is additionally added to the flow of the feedwater, which contains light contaminants with a density less than the density of water, and then the feedwater flows to the middle of the pressure flocculation reactor and then downward through the pressure flocculation reactor, and light contaminants are removed from the feedwater by upward flow.