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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 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.
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.
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)
Wastewater Technology Fact Sheet Ozone Disinfection
Disinfection is considered to be the primary mechanism for the inactivation/destruction of pathogenic organisms to prevent the spread of waterborne diseases to downstream users and the environment. It is important that wastewater be adequately treated prior to disinfection in order for any disinfectant to be effective. Table 1 lists some common microorganisms found in domestic wastewater and the diseases associated with them.
Wastewater Technology Fact Sheet Ozone Disinfection
Disinfection is considered to be the primary mechanism for the inactivation/destruction of pathogenic organisms to prevent the spread of waterborne diseases to downstream users and the environment. It is important that wastewater be adequately treated prior to disinfection in order for any disinfectant to be effective. Table 1 lists some common microorganisms found in domestic wastewater and the diseases associated with them.
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.
Lecture 3: Disinfection and Oxidation
Disinfection:
is killing or inactivate of pathogenic organisms. It is necessary if the water to be used for drinking water is not hygienically reliable. In water treatment, aimed at the production of drinking water, disinfection is the most important treatment step.
Lecture 3: Disinfection and Oxidation
Disinfection:
is killing or inactivate of pathogenic organisms. It is necessary if the water to be used for drinking water is not hygienically reliable. In water treatment, aimed at the production of drinking water, disinfection is the most important treatment step.
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
Disinfection, Chlorination and Oxidation
Chlorination: application of chlorine to water, generally for the purpose of disinfection, but also for other purposes such as odor control.
Disinfection: the addition of chlorine, ozone, UV light, etc. to water in order to kill or inactivate disease causing organisms; effectiveness measured using the coliform test.
Disinfection, Chlorination and Oxidation
Chlorination: application of chlorine to water, generally for the purpose of disinfection, but also for other purposes such as odor control.
Disinfection: the addition of chlorine, ozone, UV light, etc. to water in order to kill or inactivate disease causing organisms; effectiveness measured using the coliform test.
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