Simultaneous nitrification and denitrification in a CEM (cation exchange membrane)-bounded two chamber system.
A novel process was developed to induce a simultaneous oxidation of ammonia and denitrification in a single system consisting of two chambers separated by a cation exchange membrane. One was an anoxic chamber and the other was an aerobic chamber. The maximum mass flux via the membrane was calculated as 0.83mg NH(4)(+)-N/m(2)s in a batch test when the initial concentration of NH(4)(+) was 700 mg N/L. And it was observed that NO(3)(-) and NO(2)(-) moved via the membrane in a reverse direction when NH(4)(+) was transported. When the system was operated in a continuous mode by feeding a wastewater containing glucose and NH(4)(+), it was observed that soluble chemical oxygen demand and NH(4)(+) were simultaneously removed showing 99% and 71 approximately 86% of efficiency, respectively. Denitrification occurred in the anoxic chamber and nitrification was carried out in the aerobic chamber.
Park
Wooshin
W
Radiation Research Division for Industry & Environment, Korea Atomic Energy Research Institute, 1266 Sinjeongdong, Jeongeup, Jeonbuk 580-185, Republic of Korea.
Nam
Youn-Ku
YK
Lee
Myun-Joo
MJ
Kim
Tak-Hyun
TH
D000641:Ammonia / Q000032:analysis / Q000737:chemistry*; D001673:Biodegradation, Environmental; D019149:Bioreactors; D002412:Cations; D005374:Filtration; D009584:Nitrogen / Q000032:analysis / Q000737:chemistry*; D000644:Quaternary Ammonium Compounds / Q000032:analysis; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000737:chemistry*; D018508:Water Purification / Q000295:instrumentation / Q000379:methods*
D002412:Cations; D000644:Quaternary Ammonium Compounds; D014874:Water Pollutants, Chemical; D000641:Ammonia; D009584:Nitrogen