Compared with traditional denitrification processes, short-cut nitrification-denitrification has the following advantages:
- Energy conservation: In the nitrification stage, the oxygen supply is saved by nearly 25%, reducing energy consumption.
- Saving external carbon sources: The denitrification process converting NO?? to N? requires 40% less organic carbon sources than that converting NO?? to N?.
- Saving reactor volume: The shortened reaction path accelerates the reaction rate, which allows a reduction in hydraulic retention time and a corresponding decrease in reactor volume.
- Reducing excess sludge production: The short-cut nitrification-denitrification process can reduce sludge production by 24-33%, and the sludge production can be further reduced by 50% during the denitrification stage specifically.
- Short-cut nitrification-denitrification: A simplified biological nitrogen removal process that skips the step of converting nitrite (NO??) to nitrate (NO??), directly proceeding from ammonia (NH??) to nitrite (nitrification stage) and then to nitrogen gas (N?, denitrification stage).
- Hydraulic Retention Time (HRT): A key parameter in wastewater treatment, referring to the average time water stays in the reactor, directly affecting treatment efficiency and reactor size.
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