When Replacing Modules Just Isn?t Enough: West Basin?s Microfiltration System Replacement Evaluation

The purpose of this paper is to document the performance and integrity issues experienced at this facility and present a preliminary cost comparison to either repair or replace the Memcor 90M10C micro filtration (MF) units at the West Basin ExxonMobil Water Recycling Facility. Three options were evaluated; 1) continue repairing the existing MF system, 2) replacement with new proprietary MF systems that use polyvinylidene fluoride (PVDF) membranes, or 3) replacement with a non-proprietary MF system that can adapt a variety of manufacturer’s PVDF membrane modules. As part of the evaluation, the estimated installation cost, membrane life, yearly maintenance costs, and lost revenue were taken into account. Overall, the most cost effective solutions for the District appear to be to replace the 6 existing Memcor 9010MC units with either a proprietary or non-proprietary PVDF MF system design.

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