US 6,982,037 B2
Method for treating wastewater/water with membrane bioreactor
Ren-Yang Horng, Hsinchu (Taiwan); Wang-Kuan Chang, Hsinchu (Taiwan); Hsin Shao, Hsinchu (Taiwan); and Min-Chao Chang, Hsinchu (Taiwan)
Assigned to Industrial Technology Research Institute, Hsinchu (Taiwan)
Filed on Apr. 28, 2003, as Appl. No. 10/424,060.
Claims priority of application No. 91125326 A (TW), filed on Oct. 25, 2002.
Prior Publication US 2004/0079701 A1, Apr. 29, 2004
Int. Cl. C02F 3/10 (2006.01)
U.S. Cl. 210—615 6 Claims
OG exemplary drawing
 
1. A method for treating wastewater/water with a membrane bioreactor, said membrane bioreactor comprising a tank containing a mixed liquor having microorganisms; porous carriers in the mixed liquor; and a filtration module comprising membrane filtration material immersed in the mixed liquor and having a permeate side in fluid communication with the mixed liquor only through the filtration module; said method comprising introducing an influent into the reactor; applying a negative pressure source to the permeate side so that fluid in the tank penetrates the filtration module into the permeate side and flows out from the tank; and aerating the mixed liquor in the tank so that the porous carriers keep contact with the filtration module in a random manner, and thus reduce fouling of the filtration module.