Wastewater treatment facilities containing flammable liquids (oil-containing)

I’ve also looked at this standard myself; indeed, Table 4.2.9 does not provide any specific thresholds for concentration or physicochemical indicators. It mainly offers a qualitative assessment of the condition “containing flammable liquids (including oil)”. In actual engineering practice, reference is generally made to the definitions of combustible liquids provided in the “Fire Protection Design Code for Petrochemical Enterprises” (GB 50160) or the “General Code for Fire Protection in Buildings”, such as flash point and lower explosive limit. In the case of dilute oily wastewater (with very low oil content and a high flash point), some regions make a comprehensive judgment based on factors such as the ventilation and explosion-proof ratings of wastewater treatment facilities; they don’t necessarily adhere strictly to concentration values. It is recommended that you check the specific regulations regarding local fire safety reviews or safety assessments, or consult the standard drafting committee, to avoid compliance risks arising from self-interpretation.

This post was last edited by shijia on 2026-6-11 at 09:28. Thank you for your reply. Generally, for fine chemical enterprises, COD and BOD levels range from several thousand to tens of thousands. If these values are below 1,000 (though this isn’t a strict rule), they might be considered negligible. Or qualitatively, what situations do not count.