Hi Mohsan. Where are you ...

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Hi Mohsan. Where are you located? I'll get a Dow representative to support and work through the issues. The Dow UF is exceptional at handling high TSS loads and will outperform media filtration in quality and total recovery, we just have to make sure the system is optimised and working as recommended. What TSS are you running? Presence of metals?

please contact me at scpitts@dow.com and I can help

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I still strongly recommend keeping with the UF - it is the standard and will have significant advantages over conventional media systems. When was the last CIP? Borehole often has high Iron and can block a UF without much improvement from backwashing. Then a CEB is necessary with Acid or if it is severe then a CIP with citric acid is highly recommended. I had a plant that hit 2.0 bar TMP from metals. 1 CIP and the TMP was back at 0.4 bar. Dow UF fibres are very chemically resistant so cleaning procedures can be harsh without long term damage to the fibres. 

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Thanks, 

SDI is in normal range,  not high load of TSS Borehole water ,

We only want to replace as all system need maintenance & UF membrane blocked 

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