High acid crude oil electric desalting wastewater standard discharging treatment method
A technology of high acid crude oil and treatment method, which is applied in the fields of water/sewage multi-stage treatment, water/sludge/sewage treatment, general water supply saving, etc., can solve the problem of high operating cost, complicated process flow and limited naphthenic acid treatment effect. and other problems, to achieve the effect of less floor space and lower environmental risks
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[0018] The current treatment process of electric desalination wastewater in a refinery that processes high-acid crude oil is: use gas stripping purified water as high-acid crude oil electric desalination flushing water, and the electric desalination wastewater is mixed with assumed clean water after oil separation and flotation treatment for A / O treatment, A / O treatment After the effluent is settled or clarified, MBR treatment is carried out. The COD of the effluent treated by MBR exceeds 200 mg / L, far exceeding the current discharge standard (COD≤100 mg / L), and it is more difficult to meet the increasingly stringent local discharge standard (COD≤60 mg / L).
[0019] Comprehensive analysis of the refinery's electro-desalination biochemical treatment wastewater, the A / O section and the MBR treatment effluent were khaki-yellow and turbid, with COD of 740 mg / L and 220 mg / L, respectively. Gas chromatography / mass spectrometry and electrospray mass spectrometry The analysis confirmed...
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