Chlorination/Dechlorination System

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Chlorination/Dechlorination System

Automatic and accurate control of chlorine in potable and wastewater is very important ever due to health and regular concern. Our Chlorination and Dechlorination Control System is a cost-effective way to upgrade the chlorination and dechlorination process. It is designed with the needs of the water and wastewater industry in mind, the system offers features that help operators to meet the regulatory requirements.

Features

CHLORINATION PROCESS

Where disinfection is required and chlorine is used, the regulation requires the residual chlorine is to be limited to 0.01 mg/L (10 μg/L) (Waste Management Act – 1999 Municipal Sewage Regulation (MSR) – Part 8: Effluent disinfection).

SPD Chlorination Control System Components includes

  • Chlorine Dosing (gas or liquid) and Control (Variable Flow Rate – Constand Demand / Constand Flow Rate – Variable Demand / Variable Rate with Variable Chlorine Demand)
  • Chlorine Monitor via
    • On-line ORP Analyzer
    • On-line Non-Contact Type (gas phase) Monitor
  • Sampling System
  • Chemical Storage and Fill Station

DECHLORINATION PROCESS

Dechlorination is defined as the conversion of Cl2 ( or its HOCL or OCl- forms) to chloride, Cl-. It is the process of removing residual chlorine from disinfected wastewater before discharge into the environment.

Dechlorination Control Suing Sodium Bisulphite

Upper limits for discharge of chlorine residual into the receiving environment are 0.02 ppm (0.02 mg/L) total chlorine residual. Standard Methods states the measurement of 0.010 mg/L (10 g/L) chlorine residual is possible (but not reliable) using a low-level amperometric method. However, the control of chlorine residual at this low level is a far more significant challenge in the automated controls, mixing, and response time to changes make this very difficult to maintain. A better approach is to slightly overdose the dechlorination chemicals and monitor it. If a small excess amount of dechlorination chemical is added and detected at the same time, this will verify that the chlorine has been actively removed.

Control using residual chlorine is very difficult when limits sets at low PPB level.

SPD Chlorination Control System Components includes

  • Sodium Bisulphite Dosing and Control (Variable Flow Rate – Constand Demand / Constand Flow Rate – Variable Demand / Variable Rate with Variable Chlorine Demand)
  • Residual Sulphite Monitor via
    • On-line Non-Contact Type (gas phase) Monitor
  • Sampling System
  • Chemical Storage and Fill Station

Specifications

Additional information

Compatible with...