Abstract
Short-cut nitrification under various Nitrogen Loading Rate (NLR), dissolved oxygen (DO) concentrations and pHs at a constant temperature of 25 ±1 0C was investigated in a submerged biofilter reactor. The lowest NO2-N/NOx-N ratio was observed when the NLR was up to 160 g/m3·day. Further increase the NLRresulted in incomplete oxidation of ammonium and the effluent NH4-N and NO2-N concentration increased. Although the highest NO2-N/NOx-N ratio of 0.61 was achieved, the NH4-N removal efficiency was drastically dropped to 48% at the NLR of 294 g NH4-N/m3.day. The highest NO2-N/NOx-N ratio of 0.68 was achieved at the pH of 9.0 and 1.0 mg O2/l. However, NN4-N removal efficiency and the NO2-N/NOx-N ratio were sharply dropped to 33% and 0.55 by getting the NLR to 381 g NH4-N/m3⋅day at the DO concentrations of 2.0 mg/l. Key words: partial nitrification, NO2-N/NOx-N ratio.
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 callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
