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Evaluation of Chlorine Dioxide (ClO2) Generation System for Disinfection in RO Product Water at SWCC Jubail Plant
Recent studies have shown the formation of bromate in desalination-derived drinking water, especially when the desalinated water is treated with sodium
hypochlorite solution produced by electrolyzing seawater.
Evaluation of Chlorine Dioxide (ClO2) Generation System for Disinfection in RO Product Water at SWCC Jubail Plant
Recent studies have shown the formation of bromate in desalination-derived drinking water, especially when the desalinated water is treated with sodium
hypochlorite solution produced by electrolyzing seawater.
Advanced Disinfection Study Guide
This operator's study guide represents the results of an ambitious program. Operators of
wastewater facilities, regulators, educators and wastewater businesses, jointly prepared the
objectives and exam questions for this subclass.
How to use this study guide with references
In preparation for the exams you should:
1. Read all of the key knowledges for each objective.
2. Use the resources listed at the end of the study guide for additional information.
3. Review all key knowledges until you fully understand them and know them by memory.
Advanced Disinfection Study Guide
This operator's study guide represents the results of an ambitious program. Operators of
wastewater facilities, regulators, educators and wastewater businesses, jointly prepared the
objectives and exam questions for this subclass.
How to use this study guide with references
In preparation for the exams you should:
1. Read all of the key knowledges for each objective.
2. Use the resources listed at the end of the study guide for additional information.
3. Review all key knowledges until you fully understand them and know them by memory.
Disinfection and Chlorination
Disinfection is the process designed to kill or inactivate most microorganisms in wastewater, including essentially all pathogenic organisms. Contrast this to sterilization, which is the removal and destruction of all living microorganisms, including pathogenic and saprophytic bacteria, vegetative forms and spores.
Disinfection and Chlorination
Disinfection is the process designed to kill or inactivate most microorganisms in wastewater, including essentially all pathogenic organisms. Contrast this to sterilization, which is the removal and destruction of all living microorganisms, including pathogenic and saprophytic bacteria, vegetative forms and spores.
Disinfection Practices for Water – Basic
. Chemical and physical relationships govern all disinfection chemistry
. Knowledge of these relationships increases operator skills and troubleshooting abilities
. Allows operators to control conditions that optimize disinfection practices
. Treatment processes are managed to disinfect water for consumption and to meet regulatory objectives
. Minimum disinfectant residuals
. CT compliance - demonstration of efficient disinfection
Disinfection Practices for Water – Basic
. Chemical and physical relationships govern all disinfection chemistry
. Knowledge of these relationships increases operator skills and troubleshooting abilities
. Allows operators to control conditions that optimize disinfection practices
. Treatment processes are managed to disinfect water for consumption and to meet regulatory objectives
. Minimum disinfectant residuals
. CT compliance - demonstration of efficient disinfection
Chlorination: Disinfection And Oxidation
• Disease causing organisms can be found in surface water and some in ground water, some can be removed by preliminary, primary and secondary treatments processes. But not all are removed.
• The addition of a chemical disinfectant is necessary if a water treatment processes is to meet the coliform MCL, preventing any water borne diseases.
• Cl2, due to it relatively low cost & ease with which it be obtained is the most commonly used chemical for this purpose.
• Chlorine is available in 3 forms:
1. Chlorine Gas
2. Calcium or Sodium Hypochlorite solution
3. Calcium or Sodium Hypochlorite powder (HTH)
Chlorination: Disinfection And Oxidation
• Disease causing organisms can be found in surface water and some in ground water, some can be removed by preliminary, primary and secondary treatments processes. But not all are removed.
• The addition of a chemical disinfectant is necessary if a water treatment processes is to meet the coliform MCL, preventing any water borne diseases.
• Cl2, due to it relatively low cost & ease with which it be obtained is the most commonly used chemical for this purpose.
• Chlorine is available in 3 forms:
1. Chlorine Gas
2. Calcium or Sodium Hypochlorite solution
3. Calcium or Sodium Hypochlorite powder (HTH)
Disinfection
•Destruction or inactivation of pathogenic organisms
•Disinfection can be done by:– chemical means-chlorine, ozone, –non-chemical means-heat, UV irradiation
Disinfection
•Destruction or inactivation of pathogenic organisms
•Disinfection can be done by:– chemical means-chlorine, ozone, –non-chemical means-heat, UV irradiation
Disinfection Processes
This course includes content developed by the Pennsylvania Department of Environmental Protection (Pa. DEP) in cooperation with the following contractors, subcontractors, or grantees: The Pennsylvania State Association of Township Supervisors (PSATS) Gannett Fleming, Inc. Dering Consulting Group Penn State Harrisburg Environmental Training Center
Disinfection Processes
This course includes content developed by the Pennsylvania Department of Environmental Protection (Pa. DEP) in cooperation with the following contractors, subcontractors, or grantees: The Pennsylvania State Association of Township Supervisors (PSATS) Gannett Fleming, Inc. Dering Consulting Group Penn State Harrisburg Environmental Training Center
General Overview Volume III
. Explain the general purpose and regulatory requirements of the disinfection process.
. List bacteria, viruses and intestinal parasites that contaminate drinking water.
. List factors that influence disinfection and explain how they influence it.
. List five types of chemical disinfectants and explain the advantages and disadvantages of each.
. Explain how irradiation is used as a disinfection process.
General Overview Volume III
. Explain the general purpose and regulatory requirements of the disinfection process.
. List bacteria, viruses and intestinal parasites that contaminate drinking water.
. List factors that influence disinfection and explain how they influence it.
. List five types of chemical disinfectants and explain the advantages and disadvantages of each.
. Explain how irradiation is used as a disinfection process.
Alternative Technologies – Chlorine Dioxide
First used in beginning of 20th century, Ostend Belgium.
Known powerful water disinfectant, implemented to water disinfection in 1950’s.
Approximately 700-900 installations in water treatment.
Does not react with organics in the same way chlorine does.
Alternative Technologies – Chlorine Dioxide
First used in beginning of 20th century, Ostend Belgium.
Known powerful water disinfectant, implemented to water disinfection in 1950’s.
Approximately 700-900 installations in water treatment.
Does not react with organics in the same way chlorine does.
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