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P2 options for Waste water, spent causti and sludges



Dear P2Techers

I would appreciate from any of you suggestions and recommend readings and web sites about the following items  for petroleum refineries:

-	Spent Caustic reusing: is it feasible a cascade caustic reuse? Letīs say from Merox Units to otehr units, etc and so on
-	Waste water reuse: 
o	As far as I know putting waste water in the apropiate point of the treatment line can improve waste water treatment plants enabbling more troughput for other unit operations of the WWT plant. Any ideas about it?
o	What about reusing from one unit to another? Is it possible to use waste water form sour water stripper to desalters or to cooling waster tower?
o	For cooling water, is there any rule of thumb to know how much  treated water  can be recycled to cooling water circuit?

-	Sludge: waht are the most feasible (and economical if possible) P2 options? 

Thank you for your help

Best regards

Jose Luis Martinez


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