Is nitrogen a nuisance or is it essential for anaerobic digester? The answer is “both”. Anything in abundance is always bad anyways. For most of the process designers a safe bet will be to design an Anaerobic Digester (AD) with no more than 3,500 mg /litre of ammonia concentration operating in mesophilic range. It is important to point out that whenever anybody says ammonia in AD world it does not actually mean ammonia, it means ammonium which is NH4+ and NH3 combined. More >>
