Biological Filtration: The use of bacteria and natural biological processes to remove contaminants from water.
Bio-oxidization: When a substance has been oxidized by bacteria.
Lesson Two: Chlorination and Chlorine Demand
Students will expand their understanding of chlorine demand by participating in an experiment. Students will learn about the Guidelines for Canadian Drinking Water Quality guideline for total chlorine. Students will learn how to perform calculations involving concentration, volume and dilution factors.
Chlorination and Chlorine Demand Presentation
Chlorine gets used up when disinfecting water
The total amount of chlorine that must be added to the water to disinfect it is its chlorine demand.
Would good water have a high or a low chlorine demand?
The United States Environmental Protection Agency’s maximum residual disinfectant level goal for chlorine is 4 ppm.