[Rapid startup and nitrogen removal characteristic of anaerobic ammonium oxidation reactor in packed bed biofilm reactor with suspended carrier].
Packed bed biofilm reactor with suspended carrier was used to cultivate ANAMMOX bacteria with sludge inoculums from WWTP secondary settler. The startup of ANAMMOX reactor was comparatively studied using high nitrogen loading method and low nitrogen loading method with aerobically biofilmed on the carrier, and the nitrogen removal characteristic was further investigated. The results showed that the reactor could be started up successfully within 90 days using low nitrogen loading method, the removal efficiencies of ammonium and nitrite were nearly 100% and the TN removal efficiencywas over 75% , however, the high nitrogen loading method was proved unsuccessfully for startup of ANAMMOX reactor probably because of the inhibition effect of high concentration of ammonium and nitrite. The pH value of effluent was slightly higher than the influent and the pH value can be used as an indicator for the process of ANAMMOX reaction. The packed bed ANAMMOX reactor with suspended carrier showed good characteristics of high nitrogen loading and high removal efficiency, 100% of removal efficiency could be achieved when the influent ammonium and nitrite concentration was lower than 800 mg/L.
Chen
Sheng
S
College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China. hitchensheng@126.com
Sun
De-zhi
DZ
Yu
Guang-lu
GL
D001421:Bacteria, Anaerobic / Q000378:metabolism* / Q000502:physiology; D018441:Biofilms; D019149:Bioreactors / Q000382:microbiology*; D002947:Cities; D009584:Nitrogen / Q000302:isolation & purification* / Q000378:metabolism; D010084:Oxidation-Reduction; D000644:Quaternary Ammonium Compounds / Q000302:isolation & purification / Q000378:metabolism; D014865:Waste Disposal, Fluid / Q000379:methods*
D000644:Quaternary Ammonium Compounds; D009584:Nitrogen