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  1. osna

    Silver recovery system in a mirror line

    Our system of silver recovery consists of 2 filters: the first one is 0.5 microns and the second one is 0.2 microns. The Ag particles in the waste water decrease from about 15 ppm to 0.6 ppm in the water sewage. The regulations requirement is less than 0.1 ppm. We are thinking about Decanting...
  2. osna

    Subsea control valve manufacturer

    Can anyone help me with control valve manufacturers for a submersible 24" valve to be installed at -20m in a lake? We are dealing with a gas extraction project,but we do not have much experience in this field. I will appreciate your help, Osna
  3. osna

    Residual Value Estimate methods for Refinery Units

    Dear friends, Do you have any suggestion how to estimate residual values for Refinery Process Units that are approaching the end date of their useful life(according to literature data). Can depreciation be taken as a straight line method? The salvage (scrap) value of the equipment should be...
  4. osna

    Energy recovery with hydroturbines

    I am working in a project where we have very large quantities of water at about 3 barg. We would like to use the energy ( 3 barg to atm) in a turbine to a compressor drive. Does anybody have any experience in this subjet to recommend some suppliers for the equipment? Thanks, Osna
  5. osna

    Wet CO2 gas piping material

    We are looking for the appropriate piping material for a wet CO2 gas transfer line from the production area (off-shore) to the shore. The gas contains also methane. The piping will be submerged in a sweet water lake. Do you have any experience or suggestion in this subject?

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