Nam Viet Seafood Wastewater Treatment System

Investor: Nam Viet Joint Stock Company



My Quy Industrial Cluster, City. Long Xuyen, An Giang province

Wastewater type

Pangasius fillet wastewater


2.600m3/ day.night


Drains, garbage screens –> Collection –> Equalization tank –> DAF –> Unitank -> Pressure filter –> Disinfection –> Receiving source

Standard after treatment

TCVN 5945:2005, column A

Completed time


Project explanation

Garbage screen:  Recover shredded meat, head, fish bones present in the inlet stream.

Collection tank:   Collect all the wastewater on the channel leading to the treatment system.

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

Pressure flotation tank:  Separation of grease mixed in wastewater in two forms of “suspension and suspended sediment” by the DAF pneumatic method to float suspended particles to create surface grease. Surface degreasing by a degreaser reduces the contaminant concentration eligible for the biological treatment stage.

Unitank biological tank cluster: The most basic advantage of Unitank technology is that it is very flexible, creating aerobic / anaerobic / anaerobic conditions in the same cycle.

This allows the best treatment of nitrogen and phosphorus in the wastewater. Unitank tank system operates in each cycle, in which each planing cycle includes 2 main stages and 2 intermediate stages. Depending on the quality of wastewater, Unitank technology has the ability to dynamically adjust the operating time between phases in a cycle (blowing, stirring, settling). This allows to minimize energy costs during the treatment process without affecting the quality of the output water.

Pressure filtration:  Ensure the clarity of the water after treatment.

Disinfection tank:  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 image

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