[12] Patent
[11] Patent No.:GC0007525  
[45] Date of Publishing the Grant of the Patent: 30/Apr /2018                48/2018  
Number of the Decision to Grant the Patent:2018/125716
Date of the Decision to Grant the Patent:05/Apr/2018

[21] Application No.:GC 2013-25399

[22] Filing Date:18/9/2013

[30] Priority:

[33] State [32] Priority date [31] Priority No.
FR
19/9/2012
12/58789

[72] Inventors:1- GAID, Abdelkader ،2- LEPARC, Jérôme

[73] Owner: Veolia Water Solutions & Technologies Support, LAquarene, 1 Place Montgolfier, Saint - Maurice 94417, France

[74] Agent: Abu-Gazaleh Intellectual Property L.L.C

  

 

  

[51]IPC:
B01D 21/00; C02F 1/24

[56] Cited Documents:

-FR 2 958 929 Al (OTV SA [FR]) 21 October 2011
-GB 2 263 694 A (THAMES WATER UTILITIES [GB]) 4 August 1993
-US 3 836 460 A (WILLIS R ET AL) 17 September 1974
 
Examiner: Eng. Yusuf AlRaqabi

[54] METHOD FOR TREATING WATER COMPRISING FLOTATION COMBINED WITH GRAVITY FILTERING, AND CORRESPONDING INSTALLATION
[57] Abstract: The invention pertains to a method for treating water in order to make it drinkable or desalinated, said method comprising at least one cycle for treating said water comprising:- a step of coagulation and/or flocculation;- a step of flotation, within a flotation reactor (29), of the water coming from said step of coagulation, followed or not followed by a step of flocculation;- a step of gravity filtration, within a gravity filter (33), of the water coming from said step of flotation, said flotation reactor (29) being at least partly superimposed on said gravity filter (33), and at least one cycle for washing said gravity filter comprising a step for backwashing said gravity filter,characterized in that said step of gravity filtration is carried out at a speed of 10 m/h to 30 m/h, said gravity filter having a bed of filtering material (330) distributed on a height of 1.5 m to 3.0 m.
No. of claims: 20     No. of figures: 3


 

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