AO

AO Technology – Efficient Nitrogen & Organic Treatment for Domestic Wastewater

AO systems combine anaerobic and aerobic zones, suitable for treating domestic wastewater in residential and urban areas or centralized industrial wastewater treatment systems.

Typical applications

Domestic wastewater

Wastewater from factories and concentrated industrial zones.

Medium and large scale systems

Operating principle

AO treatment process

Step 1 — Pre-treatment
Removal of large debris and sediment

Step 2 — Anoxic tank

Denitrate removal (NO₃⁻ → N₂) by denitrifying microorganisms.

Step 3 — Oxic tank
Decomposition of organic matter & nitrification of ammonia (NH₄⁺ → NO₃⁻).

Step 4 — Settling tank
Sludge separation – collection of clear water

Step 5 — Subsequent stages
Disinfection/filtration/discharge

Advantage

High processing efficiency (integrating multiple processes in one tank)

Flexible batch operation

Save on construction space.

Reduce structural investment costs.

Why choose GR INDTECH?

Over 16 years of experience in implementing wastewater treatment systems in Vietnam.

Specializing in design, EPC, and operation of oxidation ditch technology.

Optimize operating costs and save energy.

A team of engineers specializing in microbiology and processes.

24/7 Maintenance and Technical Support Services

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