Abstract
Combining the partial Nitritation and Anammox using a rotating biological contactor (PARBC) to remove the ammonium in wastewater was evaluated in this study. The accumulation of Anammox bacteria on the carrier easily obtained after 5 days operating of sequence batch with synthetic wastewater. Then AOB biomass cultivated in PARBC to complete the process of combining two bacteria in the same reactor for completely autotrophic nitrogen removal. After 60 batches of the operation, highest nitrogen removal rate reached 0.33 kg N/m3.d with nitrogen removal efficiency is 90% at a concentration of ammonium input of 250 mg N/L. The specific Anammox activity (SAA) of biofilm and suspended sludge in the tank is determined to be 0.298 gN-N2/gVSS/day and 0.0041 gN-N2/gVSS/day, respectively. Moreover, the suspended sludge concentration is 17.765 mg MLSS/L. This result showed that Anammox bacteria adapt and grow on the rotating biological carrier; otherwise Anammox bacteria hardly develop in the form of suspended sludge in the tank. This study shows that the PARBCR has great potential to effectively removing ammonium from wastewater with the short startup time.
Highlights
The CANON (Complete Autotrophic Nitrogen Removal Over Nitrite) process is the combination of partial nitritation and anammox in one reactor [1]
This happens due to the rotation of 20 rpm in the reactor which allows the anammox sludge to attach to the media compared to the SNAP reactor
Ammonia removal efficiency of PARBC After start-up phase for attached anammox, the Amonia Oxydizing bacteria (AOB) sludge was feed into the reactor
Summary
The CANON (Complete Autotrophic Nitrogen Removal Over Nitrite) process is the combination of partial nitritation and anammox in one reactor [1]. This process can be used to remove a high load of ammonia without using external organic carbon [2]. According to Strous et al, 1997 [1], Partial Nitritation process in CANON using two autotrophic group of bacteria (aerobic and anaerobic) provided with limited oxygen. The aerobic process occurs by Nitrosomonas and the anaerobic process is by Planctomycete bacteria Those bacteria consumes ammonia and nitrite to produce nitrogen gas and a small amount of nitrate. The study points out that CANON granular sludge is formed by Amonia Oxydizing bacteria (AOB) in the surface and Anammox bacteria in the core
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
