Lectures on Sterilization and Disinfection
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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.
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.
Disinfection of Drinking Water
The goal of water disinfection is the inactivation of microorganisms, such as viruses, bacteria and protozoa, which can cause serious illnesses and death. Although disinfection can be accomplished to a significant extent by a number of physiochemical water treatment processes, such as coagulation, sedimentation, filtration, lime-soda softening and adsorption, a specific chemical disinfection step is usually incorporated into surface water treatment process trains to prevent the transmission of waterborne diseases.
Disinfection of Drinking Water
The goal of water disinfection is the inactivation of microorganisms, such as viruses, bacteria and protozoa, which can cause serious illnesses and death. Although disinfection can be accomplished to a significant extent by a number of physiochemical water treatment processes, such as coagulation, sedimentation, filtration, lime-soda softening and adsorption, a specific chemical disinfection step is usually incorporated into surface water treatment process trains to prevent the transmission of waterborne diseases.
Disinfection Alternatives For Water And Wastewater
Most Basic Requirement for Sanitation and Protection of Public Health
Prevent the Spread of Waterborne Disease – Typhoid, Salmonella, Cholera, Hookworm, etc.
Kills or Inactivates Most Disease Sources - Bacteria, Protozoa, Parasites, and Viruses
Used Widely Since Around the Turn of the Century with Huge Public Health Benefits
Reduced Infant Mortality & Increased Longevity
Disinfection Alternatives For Water And Wastewater
Most Basic Requirement for Sanitation and Protection of Public Health
Prevent the Spread of Waterborne Disease – Typhoid, Salmonella, Cholera, Hookworm, etc.
Kills or Inactivates Most Disease Sources - Bacteria, Protozoa, Parasites, and Viruses
Used Widely Since Around the Turn of the Century with Huge Public Health Benefits
Reduced Infant Mortality & Increased Longevity
Section 5.4 Disinfection with Chlorine Dioxide
1. Characters of chlorine dioxide
• ClO2 is a yellowish‐green gas with acrid odor under room temperature.
• Extremely unstable, both gas and liquid chlorine dioxide are explosive. Thus it should be prepared on site and used as aqueous solution.
• Soluble in water with a solubility 5 times of the chlorine’s; and It exists in water as dissolved gas, without any hydrolysis.
Section 5.4 Disinfection with Chlorine Dioxide
1. Characters of chlorine dioxide
• ClO2 is a yellowish‐green gas with acrid odor under room temperature.
• Extremely unstable, both gas and liquid chlorine dioxide are explosive. Thus it should be prepared on site and used as aqueous solution.
• Soluble in water with a solubility 5 times of the chlorine’s; and It exists in water as dissolved gas, without any hydrolysis.
Disinfection Basics
Disinfection Basics CEU Training Course This course will cover the fundamentals of water disinfection beginning with the different and alternative water disinfectants and ending with the biological analysis of the water, insuring that the water meets federal compliance. Task Analysis and Training Needs Assessments have been conducted to determine or set Needs-To-Know for this course. The goal of this CEU Course is to provide awareness training to help workers recognize the occupational hazards and health effects of different disinfectants, halogens, chlorine exposure and the exposure controls; and to familiarize the participants with the properties and safe handling of chlorine - solid, liquid, gas, and the operation of gas chlorinators and other related equipment.
Disinfection Basics
Disinfection Basics CEU Training Course This course will cover the fundamentals of water disinfection beginning with the different and alternative water disinfectants and ending with the biological analysis of the water, insuring that the water meets federal compliance. Task Analysis and Training Needs Assessments have been conducted to determine or set Needs-To-Know for this course. The goal of this CEU Course is to provide awareness training to help workers recognize the occupational hazards and health effects of different disinfectants, halogens, chlorine exposure and the exposure controls; and to familiarize the participants with the properties and safe handling of chlorine - solid, liquid, gas, and the operation of gas chlorinators and other related equipment.
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 Of Treated Wastewater
These guidelines provide a framework of best practices for the disinfection of treated wastewater destined either for reuse or disposal to surface waters. They will also assist water businesses and private owners of package sewage treatment plants to meet their obligations for environmental protection as stated in the SEPP (Waters of Victoria). The ultimate goal of wastewater treatment and disinfection is to produce an effluent of such quality (dependent upon final use) that minimal additional controls are needed to manage any human health, agricultural or environmental risks.
Disinfection Of Treated Wastewater
These guidelines provide a framework of best practices for the disinfection of treated wastewater destined either for reuse or disposal to surface waters. They will also assist water businesses and private owners of package sewage treatment plants to meet their obligations for environmental protection as stated in the SEPP (Waters of Victoria). The ultimate goal of wastewater treatment and disinfection is to produce an effluent of such quality (dependent upon final use) that minimal additional controls are needed to manage any human health, agricultural or environmental risks.
Disinfection of Water
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 of Water
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
The destruction of pathogenic organisms
Not to be confused with sterilization, which is the destruction of all organisms
Chlorine is the most widely used disinfecting chemical
Disinfection
The destruction of pathogenic organisms
Not to be confused with sterilization, which is the destruction of all organisms
Chlorine is the most widely used disinfecting chemical
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