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3. Technological scheme of wastewater treatment system for central business district:
- Sewage screen: Wastewater treatment in the commercial center from the kitchen is led through the sewage screen before flowing to the oil separator tank
- Air conditioning tank source of wastewater from the kitchen and water from the septic tank will be directed to the regulating tank
- Anoxic tank: Waste water will continue to flow to Anoxic tank
-Aerotank tank: The microorganisms in the tank will decompose the pollutants in the wastewater. Nutrients are added to the tank to maintain the best living conditions for microorganisms
- Biological tank: After aerotank tank, wastewater flows through biological sedimentation tanks by itself. Here the mixture of mud and water is led to the central pipe.
- Disinfection tank and pressure filter tank: Waste water after going through the sterilization tank will be pumped to the pressure filter tank to remove remaining bacteria in the wastewater. The treated wastewater will be discharged into the receiving source to meet QCVN 14: 2008 / BTNMT.
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