Wastewater treatment system in Cai San resettlement area

Investor: Dong Loi Bay Single share-holder Co., Ltd



My Thanh Ward, Long Xuyen City, An Giang Province

Wastewater type

Domestic wastewater


120 m3/ day.night


Collection + Sedimentation 1 -> Equalization -> Aerobic + MBBR -> Sedimentation 2 -> Storage -> Pre-filtration -> Disinfection -> Receiving source

Standard after treatment

QCVN 14:2008/BTNMT, column A

Completed time


Project explanation

Collection tank:  Preliminary sedimentation retains large-sized impurities heavier than water and then concentrates in the sump for distribution to the treatment units behind the system.

Eqalization tank:   Stabilize flow, contaminant concentration, pH. Preliminary ventilation to avoid anaerobic decomposition causing odors.

Aerobic + MBBR tank: The amount of gas supplied to the tank for the purposes of: (1) providing oxygen for aerobic microorganisms to convert dissolved organic matter into water and carbon dioxide, organic nitrogen and ammonia into NO3- nitrate, ( 2) evenly mix wastewater and activated sludge to create favorable conditions for microorganisms to contact the substrates to be treated, (3) release gases that inhibit the microbial life process,

These gases are generated during the process of microbial decomposition of pollutants, (4) positively affecting the reproduction process of microorganisms.

Sedimentation tank 2: The settling tank is designed for the purpose of settling solids in suspension and suspension, eliminating odors from wastewater in order to improve the settling efficiency of sediments in wastewater.

Pre-filtration device: The pre-filter is created for the initial filtration, removing impurities, large-sized particles hidden in tap water or well water.

Disinfection tank:   In contact with Chlorine to completely destroy Coliforms and other disease-causing germs, the treated water meets environmental standards and is discharged into the receiving source.

Project images

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