SYSTEMS AND METHODS FOR ACHIEVING PARTIAL NITRIFICATION IN A BIOLOGICAL NITROGEN REMOVAL REACTOR
摘要
<p>Methods of controlling a nitrification reaction in a biological nitrogen removal reactor to favor partial nitrification of ammonia to nitrite instead of complete oxidation of ammonia to nitrate are disclosed. In some embodiments, the methods include the following: maintaining a pH in the reactor within a range that promotes growth of ammonia oxidizing bacteria; maintaining a concentration of dissolved oxygen in the reactor within a range that limits the ammonia oxidizing bacteria from completing nitrification; selecting an operational solids retention time within a range suitable for maintaining increasing concentrations of the ammonia oxidizing bacteria in the reactor while reducing concentrations of nitrite oxidizing bacteria in the reactor; and increasing a concentration of free ammonia in the reactor thereby inhibiting growth of the nitrite oxidizing bacteria in the reactor.</p>
申请公布号
WO2009046415(A1)
申请公布日期
2009.04.09
申请号
WO2008US78929
申请日期
2008.10.06
申请人
THE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORK;CHANDRAN, KARTIK;YU, RAN;AHN, JOON, HO