Notes from GB 50014 'Outdoor Drainage Design Standard' on Denitrification Carbon Source Design

The 'Outdoor Drainage Design Standard' GB 50014-2021 specifies denitrification carbon source for biological nitrogen and phosphorus removal processes, stating that external carbon source should be considered when influent carbon is insufficient.

The standard sets requirements for carbon source dosing point, metering and mixing, serving as an important basis for carbon source system design in WWTP upgrade projects.

Sodium acetate, with its solubility and denitrification rate advantages, is often a preferred reference option for external carbon sources; design should calculate carbon source amount based on influent BOD5/TN and effluent TN target.