filtration system sand media

Temporary Filtration System Saves Mill Millions at Pulp and Paper Plant

BACKGROUND

A Pulp and Paper plant required a temporary filtration system due to a failing pump and degenerating clarifier. The permanent system was scheduled for maintenance during a planned shut down but required emergency services when a motor unexpectedly broke. The plant needed a system that could intake 2,000 GPM of colloidal-sand rich river water with 4 NTU and filter it down to 1.5 NTU to prevent plugging equipment upon entering the plant.

OUTCOME

The Rain for Rent team in Nampa, ID, installed a manifold system with five sand media filtration units, four primary and one backup, to filter incoming river water with a flow rate of 3,000 GPM. The backwash from the filters was piped to an approved discharge location.

filtration installation

HIGHLIGHTS

  • Rain for Rent provided a system that met the plant’s criteria within an emergency response time frame and incorporated changes to the equipment and staff scope as necessary.
  • Five filters were sourced from other Rain for Rent locations around the country.
  • To mitigate the risk of fluctuating river-water quality impacting the filters and flow, Rain for Rent manned the system 24/7 for 17 days until the clarifier was back online.
  • The required water quality parameters were met and colloidal sand measurements remained under 100 ppm.

CUSTOMER FEEDBACK

The customer, partnering with Rain for Rent for the first time, was very happy with the system and the Nampa team. The Mill shared that their cost-savings was in the multi-millions as a shut-down would have totaled nearly $1,000,000 a day.

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