Water Treatment Plant Control - KRS INDUSTRIAL CONTROL SYSTEM CO., LTD

About the project

Date: 2025
Client: Tapioca Starch Plant
Category: Process Plant, Water & Utility
Address: Nakhon Ratchasima, Thailand

Project Information The Water Treatment Plant Control project delivered the control and supervision system for a plant water treatment and recycling facility, covering raw water intake, chemical dosing, clarification, storage and return of treated water to the process. Chlorine, polymer and alum dosing pumps, transfer pumps, level transmitters and flow control loops are all brought together on a single SCADA process graphic, so the operator follows the water through the whole train from one screen. Our scope covered pump and dosing control, level and flow instrumentation, PLC sequence programming, SCADA graphic development, alarm handling for out of specification conditions, and logging of water consumption and discharge quality for environmental reporting.

Benefits of Project

Treated water quality held consistently within specification
Lower fresh water intake through reliable recycling
Chemical consumption matched to actual demand instead of fixed dosing
Automatic duty and standby rotation that extends pump life
Whole treatment train visible on one SCADA screen
Records ready for environmental compliance reporting

Technologies We Used

SCADA process graphic for the complete treatment train
PLC sequence control for dosing, clarification and transfer
Chlorine, polymer and alum dosing pump control (M18001 to M18004)
Transfer and recirculation pump control (M28001 to M28009)
Level transmitters LT18001 and LT18002 on the storage tanks
Flow control loop with FIC set point, process value and output
Sediment trap, clarifier and manhole tank monitoring

The Whole Treatment Train on One Screen

The SCADA graphic follows the water from the sediment trap through chemical dosing, clarification and storage. Chlorine, polymer and alum dosing pumps M18001 to M18004 sit on the left with their own run status and output percentage, transfer pumps M28001 to M28009 are shown in the position they occupy in the plant, and level transmitters LT18001 and LT18002 report the contents of the storage tanks. An operator sees the state of the whole train without changing page.

Dosing That Follows the Water

Chemical dosing is driven by measured flow and level through a flow control loop with its own set point, process value and output, rather than a fixed pump setting. The plant adds what the incoming water actually needs, which keeps treated quality inside specification when the load changes and removes the routine overdosing that a fixed setting requires as a safety margin.