Water and Wastewater Disinfection
Course Pack: Disinfection (Chlorine)
Another Look at Chlorination Systems
Course Description
This module provides operators with a deeper examination of chlorination
system behavior, focusing on sodium hypochlorite deterioration, combustion risks, and the
operational decisions that influence system stability. Learners learn how to verify chemical
strength, prevent storage-related hazards, and select pumps, day tanks, and materials that are
compatible with hypochlorite solutions. Practical troubleshooting guidance supports safe,
reliable operation of chlorination systems in both water and wastewater environments.
Learning Objectives
1) Explain sodium hypochlorite instability and risks
2) Identify combustion and deterioration hazards
3) Apply strength verification tests
4) Select pumps and day tanks appropriately
5) Prevent piping and material compatibility issues
Agenda
1) Chemistry and operational impacts of hypochlorite deterioration
2) Preventive measures to reduce fire and spontaneous‑combustion risks in storage areas
3) Methods for hypochlorite strength testing and verification to ensure accurate dosing
4) Design considerations for pumps, day tanks, and compatible plastic piping systems
5) Common operational issues and troubleshooting approaches for hypochlorite systems
Target audience
Operators working with chlorination systems, storage, dosing equipment, or hypochlorite management.
Level
II, III
Learning material and method
Online on-demand
Assessment
Knowledge check and quiz (80% correct and above)
Instructor
Mike Harrington