AO technology for wastewater treatment: Advantages, principles and applications

AO wastewater treatment technology is one of the leading advanced solutions today. This technology actively supports the treatment of wastewater sources in daily activities and production. Let’s learn more about this technology in more detail in the following article!

What is AO technology?
AO technology uses anoxic microorganisms to help achieve biological denitrification in activated sludge. This is a premise that dates back to 1962. The studies were created by two researchers: Ludzack and Ettinger, in the US.

What is AO technology?

By 1964, technology was more advanced with nitrate reduction. Since then, it has been widely applied and popular around the world.

Advantage
Some outstanding advantages of AO wastewater treatment technology:

Helps remove BOD organic matter content in wastewater.
Removes high levels of P and N, produces good sludge.
The investment cost in installing this technology system is low and affordable.
The system operates well, is stable and has outstanding automation capabilities.
Low maintenance and periodic maintenance costs.
Can be designed in modular form to help save space and easily increase capacity.
Operating principle of AO technology
Wastewater treatment AO technology has two aerobic and anoxic zones, which respectively correspond to the nitrification process in the aerobic tank and help denitrification in the aerobic tank. However, it actually creates denitrification in wastewater.

We have the AO technology operation process as follows:

Process 1
Includes an anoxic tank that will be followed by an aerobic tank. At that time, nitrate produced in the aerobic tank will be returned to the anoxic tank. At the same time, due to the anoxic process before the aerobic tank, this process is also called pre-anoxic denitrification.

Process 2
This is the following anoxic denitrification process. In particular, BOD will be removed in the aerobic tank first. When transferred to an anoxic tank, it will no longer have enough carbon for the denitrification reaction. BOD removal occurs at a much slower rate than in the previous anoxic process.

Application of AO technology
Currently, AO wastewater treatment technology has been widely used in many fields around the world.

Treatment of contaminated wastewater.
Use microbial membrane material (MBBR) in the tank or use MBR membrane in the tank to increase treatment efficiency.
AO wastewater treatment technology has low operating and construction costs.
Besides, technology brings many outstanding advantages. Therefore, you should choose to treat domestic wastewater with this technology.
In addition, the problem of domestic wastewater treatment depends on many factors. Experts will consider the actual situation to plan appropriately for each specific project.

Currently, Toan A Environmental Technology Joint Stock Company has been using many modern techniques in wastewater treatment projects. AO technology is the best solution to help treat wastewater sources at home, residential areas or production and processing areas.