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This is an advanced sewage treatment process that promotes nitrification and uses inclusive immobilization supports.
The biological reaction tank is partitioned into an anaerobic tank and an aerobic tank, and by adding nitrifying pellets, which contain highly concentrated, immobilized microorganisms. This nitrogen treatment process promotes nitrifying reactions. This process can also be combined with physiochemical phosphorus removal methods such as biological phosphorus removal methods and adding coagulants to remove phosphorus.
Nitrifying pellets are inclusively immobilized supports whose objective is to hold nitrifying bacteria. Each side of the cube is about 3 mm. If these supports are acclimated in an environment where nitrifying bacteria easily multiply, the nitrifying bacteria multiply on the inside surface of the supports. When they acclimate, nitrifying bacteria multiply on the inside surface of the supports.
Keeping supports where nitrifying bacteria have multiplied in an aerobic tank efficiently performs nitrification treatment.
The residence period is 6-8 hours, and the system is easy to apply to existing standard activated sludge-method treatment facilities.