Patent ID: 7897375
Filing Date: 2011-03-01
Classification: C02F

Abstract:
1. A method for collecting bacterial cells comprising: feeding water containing ammonium and nitrite to an anaerobic ammonium oxidation vessel to denitrify ammonium and nitrite by anaerobic ammonium oxidizing bacteria provided in the anaerobic ammonium oxidation vessel to form denitrified water containing an amount of the anaerobic ammonium oxidizing bacteria and a sludge containing an amount of the anaerobic ammonium oxidizing bacteria; and feeding the denitrified water containing an amount of the anaerobic ammonium oxidizing bacteria and the sludge containing an amount of the anaerobic ammonium oxidizing bacteria to a precipitation vessel containing in an upper portion thereof an acclimatization container containing an immobilizing material, to cause the anaerobic ammonium oxidizing bacteria in the denitrified water to be attached to the immobilizing material in the acclimatization container, so that the anaerobic ammonium oxidizing bacteria in the denitrified water are collected, and, at the same time, collecting the anaerobic ammonium oxidizing bacteria of the sludge by precipitating the anaerobic ammonium oxidizing bacteria of the sludge to form a separated sludge of bacteria cells in the precipitation vessel.