Production and removal of soluble organic nitrogen by nitrifying biofilm

This study investigated soluble organic nitrogen (sON) activity in batch reactors mimicking nitrifying moving bed biofilm (MBBRs). work was divided into two objectives focusing on the production and degradation of sON, respectively. For first objective, a synthetic feed that did not contribute any used results indicated irrespective presence influent carbon (0 versus 400 mg COD/L) reactors, sON contributed by during nitrification. Although net observed, both ammonification coexisted which regulated concentration. second actual wastewater fed to investigate under different (C/N) ratios. A higher concentration biodegraded reactor when with containing lower C/N ratio. Overall suggested bioavailability and/or ammonia influenced sON. is explore MBBR findings from this could extend knowledge fixed film process respect regulate optimize operation meeting stringent total discharge limits. • Soluble produced reactor. Highest observed at lowest tested. cycled via ammonification. Bioavailability C level activities.