Title:
A method and a device of Denitrification in liquid waste treatment
Document Type and Number:
Japanese Patent JP6230032
Kind Code:
B2
Abstract:
A wastewater treatment method comprising:providing a biological nutrient removal (BNR) reactor that is equipped with an aeration device;using an ammonia analyzer in the BNR reactor to sense ammonia in the BNR reactor and generate an ammonia concentration signal;using an oxidized nitrogen analyzer to sense oxidized nitrogen concentration in the BNR reactor, and generate an oxidized nitrogen signal representative of nitrite, nitrate, or combination of nitrite and nitrate concentration;using a controller to process the oxidized nitrogen and ammonia concentration signals, and issue a command signal to the aeration device to control dissolved oxygen (DO) concentration, duration of an aerobic period, and/or duration of an anoxic period, in the BNR reactor, based on a ratio or sum of ammonia concentration and oxidized nitrogen concentration; andfeeding an effluent containing ammonia, nitrite and nitrate from the BNR reactor into an anoxic reactor where anammox bacteria are selectively grown and retained.
Inventors:
Wet Bernhard
Legumi pass car
Omari Ahmed
Mirror mark
Bot Charles Bee.
Multis Sudir N.
Legumi pass car
Omari Ahmed
Mirror mark
Bot Charles Bee.
Multis Sudir N.
Application Number:
JP2015532099A
Publication Date:
November 15, 2017
Filing Date:
September 13, 2013
Export Citation:
Assignee:
D.C. Water and Sour Authority
Hampton Rose Sanitation District
Hampton Rose Sanitation District
International Classes:
C02F3/34
Domestic Patent References:
| JP2010017639A | ||||
| JP2005218939A | ||||
| JP2008221160A | ||||
| JP2003010883A | ||||
| JP2008221161A | ||||
| JP2012501845A | ||||
| JP2002521182A | ||||
| JP2003001292A |
Foreign References:
| WO2006129132A1 | ||||
| US20110198284 | ||||
| WO1998030504A1 | ||||
| US6485646 |
Attorney, Agent or Firm:
Tamio Nishiwaki
Nishiwaki Reishi
Nishiwaki Reishi