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Key Data Set Information
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Location
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CN
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Geographical representativeness description
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17 WWTPs in China
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Name
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Municipal wastewater treatment ; Wastewater ;Anaerobic-anoxic-oxic (A2/O)
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Use advice for data set
| 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. |
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Technical purpose of product or process
| The data set describes the municipal wastewater treatment process employing the Anaerobic-Anoxic-Oxic (A2/O) configuration. It is applicable to the operation of wastewater treatment plants (WWTPs), which include a sequence of anaerobic, anoxic, and aerobic treatment stages aimed at reducing organic pollutants, nitrogen, and phosphorus. This process is predominantly used in urban sewage treatment facilities to improve water quality before discharge into natural water bodies or for reuse. |
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Classification
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Class name
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Hierarchy level
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| 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. |
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Copyright
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No
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Owner of data set
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Quantitative reference
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Reference flow(s)
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Technological representativeness
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Technology description including background system
| 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. |