Patent ID: 6982037
Filing Date: 2006-01-03
Classification: B01D,C02F

Abstract:
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.