In general, the use of ...

In general, the use of ultrafiltration is an excellent method of removing turbidity.  Ultrafiltration membranes are sensitive to the presence of incoming particles, and some pre-filtration may be a solution to consider, especially if colloids or large particles are present in the source water.  I would recommend you look into a media filter in front of the UF, to protect the membrane, but keep the UF in place.  The final decision would be based on the final requirement you have for the finished water.  As many others have already stated, not enough information is presented to give a specific solution to your issue, but having a membrane UF exposed to unfiltered source material is very likely to result in excessively high maintenance costs and poor filtration performance.  Another possibility is membrane failure, leakage or incomplete sealing of the system, resulting in poor quality (turbidity) of your finished water.  sam.mason2824@gmail.com.