I especially agree with Jeremy because usually MBBR process is highly aerated for biomass needs but also for mixing plastic media so you should not observe such H2S concentrations at the outlet except if you have high SRT in your clarifier => if it is the case, you should see bubbles at the surface (especially downstream the bridge move) and also black sludge on the surface of the clarifier due to anaerobic conditions at the bottom.
Published by Michael Martin, Deputy Asset & Technical DIrector at SUEZ International
I especially agree with Jeremy because usually MBBR process is highly aerated for biomass needs but also for mixing plastic media so you should not observe such H2S concentrations at the outlet except if you have high SRT in your clarifier => if it is the case, you should see bubbles at the surface (especially downstream the bridge move) and also black sludge on the surface of the clarifier due to anaerobic conditions at the bottom.