Method for biochemically treating and discharging refinery wastewater within controlling index of national standard
A technology for biochemical treatment and oil refinery sewage, applied in multi-stage water/sewage treatment, flotation water/sewage treatment, water/sludge/sewage treatment, etc., can solve aggravated emulsification, low ability to remove ammonia nitrogen, and high-concentration sewage Impact increase and other issues, to save investment and operating costs, compact system structure, reduce floor space
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[0017] The present invention relates to oil refining wastewater treatment technology, in particular to the biochemical treatment technology of oil refining wastewater after flotation treatment. It mainly adopts the combined process of "anaerobic fluidized bed biofilm reactor-anoxia-aerobic fluidized bed biofilm reactor" to treat oil refinery wastewater, providing a safe and reliable biochemical treatment technology for oil refinery wastewater.
[0018] After the flotation of the previous oil refinery sewage, the COD is about 400mg / l, and reaches 800mg / l under shock conditions. Due to the heavy and deteriorating crude oil products, after flotation, COD is generally 800~1000mg / l or even higher. The oil and salt content in the sewage is relatively high, so the patent of the present invention adopts the biological treatment method of "anaerobic fluidized bed biofilm reactor-anoxic tank-aerobic fluidized bed biofilm reactor" with high salt and high sulfur resistance. A specific proce...
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