Municipal wastewater treatment ; Wastewater ;Anaerobic-anoxic-oxic (A2/O)

Categories:
Categories:
Unit processes/End-of-life treatment/Waste water treatment
Location:
CN - China
Reference year: -
Description

The anaerobic-anoxic-aerobic (A2/O) process is a commonly used biological treatment technology for wastewater treatment. The process divides the treatment process into three stages: anaerobic, anoxic and aerobic. In the anaerobic stage, organic matter is partially degraded by microorganisms under anaerobic conditions. Then, under anoxic conditions, nitrogen is released and nitrification takes place. Finally, under aerobic conditions, the microorganisms further oxidize the organic matter and remove nitrogen and phosphate.The A2/O process is capable of efficiently removing organic matter, nitrogen and phosphorus, and is a mature technology widely used in municipal and industrial wastewater treatment, with high treatment efficiency and low energy consumption. This data set is to be used specifically for the assessment of WWTPs using the A2/O process in China. Users must consider the scale and efficiency of the WWTPs, as it pertains to Chinese environmental standards. Attention should be given to the operational parameters, such as hydraulic retention time, sludge age, and specific nutrient removal rates. These factors must be cross-checked with actual facility data for accuracy. The data should not be extrapolated to other countries or treatment systems without additional verification. Users should account for possible variations in efficiency due to technological advancements or operational improvements when applying this data to current or future scenarios.

Technology

The anaerobic/anoxic/aerobic (A2O) process begins with partial degradation of organic matter through the anaerobic stage, followed by nitrogen release and nitrification under anoxic conditions, and ends with further oxidation of organic matter and nitrogen and phosphorus removal under aerobic conditions. This series of steps, by controlling different reaction conditions, enables efficient treatment of organic matter, nitrogen and phosphorus in the wastewater and completes the purification of the wastewater.

Process type
Unit
LCI modeling approach
Unknown
Multifunctional modeling
NONE
Format
ILCD
Aggregation type
NOT_APPLICABLE
Data provider
TianGong
Review status
Internal
Cost
Free
Contact
Tiangong LCI Data Working Group