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  1. omjee

    sludge formed while attempting to neutralise caustic

    Hi there, You might want to consider dissolved air flotation to remove this unsettling sludge. Dissolved air helps float the sludge so that the floating sludge can be removed from the surface as scum by a mechanical skimmer. Cheers, Wan
  2. omjee

    Membrane preservation method

    Hi chemist 2020, Please find my reply below. 1)If you are talking about preserving membranes that are taken out of the pressure vessel, they are usually soaked in a diluted SBS solution. Anyway, please check with the manufacturer again on their recommendations. 2)The average life span of RO...
  3. omjee

    Reverse osmosis operation

    Hi Ctrip, Can you give us information about the pre-treatment for this RO? There are many types of fouling so you might need to identify the type of fouling here to pinpoint the root of the problem. Higher RO reject conductivity could mean that you have higher feed TDS as RO operates by...
  4. omjee

    RODI specification (Reverse Osmosis De-Ionised)

    Hi there, As far as I am concerned, there's no specific pipe requirement for RODI plant hence it really depends on owner's requirement. However for general and semi conductor industries, the most common pipe materials being used are PVC Sch 80 (ASTM D-1785) for pre-treatment line, SS 304 Sch 10...
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