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Water Treatment Process

Water Treatment Process

Advanced membrane bioreactor method
By introducing partial modification of the removal mechanism in the A2O method, it removes organic matter, nitrogen and phosphorus caused by nitrification, denitrification and excessive phosphorus in a bioreactor tank composed of anoxic, anaerobic, aerobic and internal transfer tanks. It is a sewage treatment technology that separates solid and liquid and removes coliform bacillus by installing an immersed hollow fiber membrane in an aerobic tank instead of a settling tank. This separation membrane method that uses a sodium hypochlorite (NaOCl) in an aerobic tank to clean utilizing natural flow when the hollow fiber membrane is contaminated.

Configuration and function

Configuration Function
Anoxic tank NO3-N in the internal returned water is reduced by denitrifying microorganisms and converted to N2Gas to remove nitrogen (N)
Anaerobic tank In the anaerobic state, organic matter is absorbed into the cells of phosphorus-removing microorganisms and phosphorus is re-released to obtain the required energy.
Aerobic tank
  • Removal of organic substances
  • Nitrogen compounds are oxidized to NO2-N and NO3-N by nitric oxide microorganisms
  • An amount of PO4-P that is greater than the amount released from the anaerobic tank is excessively ingested in the microorganisms in the activated sludge and removed with the excess sludge.
  • Solid-liquid separation using separation membrane
Degassing tank Internal return to anoxic tank

Performance

  • Excellent ability to cope with temperature and load fluctuations by maintaining high MLSS
  • As there is no final settling pond, there is little plottage and facility arrangement is smooth.
  • Separated filtration and disinfection facilities are unnecessary as stable treatment water quality is secured by separating solids using membranes.
Water quality assurance BOD 5 ㎎/ℓ
SS 5 ㎎/ℓ
T-N 20 ㎎/ℓ
T-P 2 ㎎/ℓ
Total coliform bacillus Non-detection