Zero-discharge treatment method for offshore-platform domestic sewage
A technology for domestic sewage and offshore platforms, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc. problems, to achieve the effect of reducing COD and suspended matter load, ensuring long-term continuous and stable operation, and avoiding poor impact load resistance
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[0028] The amount of domestic sewage produced by a fixed facility in the South China Sea is 72m 3 / d, the conductivity of sewage is between 25000-33000μS / cm, Cl - Between 10000-150000mg / L, COD between 600-1200mg / L, and ammonia nitrogen between 50-100mg / L, the original MBR type domestic sewage treatment system cannot meet the requirements of sea discharge treatment. Sewage zero discharge treatment method "pretreatment + MBR + internal circulation photocatalytic oxidation + reuse combined process" treatment, sewage residence time is 2h, effluent COD≤125mg / L, BOD 5 ≤10mg / L, ammonia nitrogen ≤5mg / L, SS≤5mg / L, Escherichia coli ≤15 / L, and all the effluent is used for flushing the toilet. Specific example two:
specific example 2
[0029] The amount of domestic sewage produced by a fixed facility in the Bohai Sea is about 40m 3 / d, the conductivity of sewage is between 20000-30000μS / cm, Cl - Between 9000-140000mg / L, COD between 550-1000mg / L, ammonia nitrogen between 50-100mg / L, the original electrolytic domestic sewage treatment system often breaks down due to the excessive load of COD and suspended solids , can not meet the treatment requirements, after the zero-discharge treatment method of domestic sewage on the offshore platform "pretreatment + MBR + internal circulation photocatalytic oxidation + recycling combined process" treatment of the present invention, the sewage residence time is 1h effluent COD≤125mg / L, BOD 5 ≤8mg / L, ammonia nitrogen ≤7mg / L, SS≤5mg / L, Escherichia coli ≤10 / L, all effluent is used for flushing toilets.
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