The enterprise discharges organic wastewater and stripping wastewater. The organic wastewater contains relatively low levels of COD and ammonia nitrogen, whereas the stripping wastewater has significantly higher concentrations of both total nitrogen and COD. Specifically, COD ranges from 1,000 to 1,100 mg/L, total nitrogen ranges from 105 to 150 mg/L, and ammonia nitrogen is below 5 mg/L, indicating a high organic nitrogen content. Thus, stripping wastewater is classified as medium-to-high concentration organic nitrogen wastewater.
