The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 02, 2013
Filed:
Jul. 30, 2008
Marylène Baron, Rueil Malmaison, FR;
Sylvie Baig, Montesson, FR;
Marylène Baron, Rueil Malmaison, FR;
Sylvie Baig, Montesson, FR;
Degremont, Paris la Defense, FR;
Abstract
The invention relates to a biological wastewater purification method using a reactor including a first compartment () and a second compartment (), the lower parts of which are communicated with one another. The water to be treated enters the first compartment, while the second compartment houses aerobic granular sludge at atmospheric pressure. Oxygen-laden gas is injected into the lower part of the second compartment. The granular sludge forms a bed () in the second compartment () and the reactor operates in a sequential, discontinuous manner in a cycle comprising two phases, namely: a first anaerobic phase during which the first compartment () is vacuum-filled with the water to be treated, after which the pressure is abruptly brought to atmospheric pressure in order to discharge a volume of water rapidly into the second compartment (); and a second aerobic phase during which gas containing oxygen is injected into the second compartment ().