SOP for Preventive Maintenance for DM Plant

PURPOSE

To ensure operational qualifications and performance qualifications are achieved.

SCOPE

This SOP provides the guide for maintenance and QC for the quality of the filtration plant.

PROCEDURE

Sand Filter/Carbon Filter

• Inspect and replace all defective parts once a year.
• Bolts and nuts should be greased to prevent corrosion and to facilitate easy removal during maintenance.
• Once a year the carbon and sand beds must be given an extended backwash
• The inside surface of the sand bed must be coated with black bituminous paint once a year.

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Ion Exchange Unit

• Inspect the inside of the column every six months.
• The unit must be given an extended backwash with the top cover open. Fine collection on the top of the resin surface should be scrapped off and fresh resin changed if necessary.
• If the deteriorating of quality of the final treated water from the plant is accompanied by long times for anion resins prepare an alkaline brine solution and pour it in the anion unit following the anion infection step.
• After the alkaline-brine wash, the anion column and perform regeneration operation.

Conductivity Analyzer

• Ensure that water flows upward through the conductivity cell.
• Ensure that the power outlet at the site was a food.
• Calibrate the meter once every six months.

REVISION HISTORY

Nil

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