Portable Filtration System Helps Project Move Forward

A municipal water main located in Northern California recently underwent major repairs using an innovative technique...

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A municipal water main located in Northern California recently underwent major repairs using an innovative technique in which the pipeline was cordoned off, inserted with a liner to seal off cracks in the pipe, refilled with water, then reconnected to the pipeline system so the repair team could move to the next section down the line. However, an unusual challenge arose when the contractor was told by local regulators that the water being discharged from the repaired line measured too high in parts per million of a harmful contaminant, polystyrene.

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An eight-vessel activated carbon filtration system was mounted on a flatbed trailer and moved from site to site as sections of pipeline were repaired.
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Baker Filtration, a provider of activated carbon technology, was brought into the project to identify and implement a contaminant removal solution that would reduce the level of polystyrene in the water. The removal system needed to be portable so that it could move down the pipeline grid along with each section that underwent repairs.

The pipeline repairs were only scheduled to take place during off-peak hours due to the busy street that the water main ran alongside. Each day beginning at 7 p.m. the repair team set-up their filtration system, installed the replacement liner and fixed a section of water main. They worked through the night and demobilized each day at 6 a.m., just in time for rush hour commuters to start their morning.

Baker Filtration and its team of engineers and field technicians worked side-by-side with the repair contractor to build a polystyrene removal system. First, they identified the carbon media that would be used to treat the water contaminated with polystyrene. The Baker team then engineered an eight-vessel activated carbon filtration system that could handle the daily flows that the pipeline repair team required. They modified a flatbed trailer that the carbon vessels could stand on, thereby making the system portable. A truck pulled the carbon vessels to each adjacent section of pipeline as it was repaired.

The project was completed successfully with the discharge water never exceeding the allowable concentrations of contamination. A second phase of the project has recently commenced using a similar treatment system.

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