Online Coagulant Dosage Analysis and Control System(Model : CAST)

■ Principle : Streaming potential analysis and titration.

■ Optimal coagulant/polymer dosage analysis and chemical pump control.
■ Integrated dosing system with high accuracy.
■ Regular backwashing of screen. Immediate cleaning of cell & sampling line after measurement.
■ Outputs for coagulant dosing rate & self-diagnostic alarm : RS485, & 4~20mA
■ Operator can monitor CAST operation status at the control room using provided protocol.(Option)
■ Automatic sampling and rinsing system.
■ Automatic cleaning system for measuring cell, piston and sample line.

    ; User-adjustable cleaning time and cycle.
■ User selectable titration parameter setup. 

■ CAST Online Operation Program

  • Real-time Control and Data Monitoring
  • Yearly, Monthly, Daily Data Storage
  • The user can load data file in Excel.
  • Operation Status Display
  • Error and Troubleshooting Display.
  • Communication to DCS : RTU RS485 and 4-20mA for chemical dosing control (Option)
  • Output for alarm : RTU RS485 or 4-20mA
     Range : RTU RS485 or 4~12mA(Yellow Alarm) & 12~20mA(Red Alarm)
■ Self-Diagnostic System
- Alarm and Warning for sample supply shortage, low water pressure, low air pressure, titrant shortage, cleaning solution shortage, coagulant demand upper/lower limit, no memory, regular cleaning time and measuring cell condition.

■ Polymer dosage determination in sludge dewatering process
■ Polymer dosage is proportional to colloidal charges in sludge
■ Automatic polymer dosage control depending on the sludge charge characterization
■ Online control of polymer dosage up to 4 dewatering machines using a single CAST
■ Auto cleaning after each measurement
■ Very low maintenance
■ Very efficient for target moisture content control of sludge cake
■ Applications : Water treatment process, T-P removal process, sludge dewatering process, and membrane pretreatment process