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Advanced Nitrogen Treatment - Microbial Immobilization Technology
Hitachi combined “anammox” and “Bacteria entrapment”.
→More effective biological treatment system
anammox bacteria easily wash out from the reactor due to the slow growth rate. (one- tenth that of nitrifier)
Microorganism entrapment by PEG
Hitachi has already used the gel entrapment technique in many installation.
|②||Post nitrogen treatment||Low(15-30)||✔||✔
|③||For side stream nitrogen treatment||High(500-1000)||✔
|Optimum temp.||Normal (10-37℃)||High (25-37℃)|
The anammox process is a cost-effective means of biological ammonia removal. (anammox : anaerobic ammonium oxidation)