Wastewater Treatment: AAO Process Efficiency
The AAO (Anaerobic-Aerobic-Oxic) process is a biological treatment method used in wastewater treatment, combining anaerobic, anoxic, and Oxic (aerobic) stages to remove organic matter, nitrogen and phosphorus.
In the anaerobic stage, bacteria break down organic pollutants without oxygen, producing methane and volatile fatty acids. In the anoxic stage, nitrate serves as the electron acceptor for denitrifying bacteria to reduce nitrogen levels. Finally, in the aerobic stage, oxygen is introduced to support the growth of aerobic microorganisms that further degrade organic material and promote the nitrification process, converting ammonia into nitrate. This integrated approach effectively treats wastewater by addressing both nutrient removal and organic matter degradation.
Real-time monitoring using the Online UV Nitrate Monitoring System and Online UV254 Sensor for COD significantly improves control in the AAO process. These instruments provide accurate, continuous data that allows operators to fine-tune aeration and carbon dosing for better efficiency and performance.
Online UV Nitrate Monitoring enables precise nitrate control in anoxic and oxic zones, reducing aeration energy use and optimizing carbon addition for denitrification.
Online UV254 for COD offers early detection of organic load changes, supporting stable biological conditions and preventing over- or under-dosing of carbon.
Together, these technologies lead to lower operating costs, improved nutrient removal, and a more sustainable wastewater treatment process.