Understanding Disinfection Methods and Sludge Treatment Process
Explore the various methods of disinfection including physical actions, poisons, oxidizing agents, and factors affecting disinfection. Learn about the chemistry of chlorine and different forms of chlorine. Discover the treatment process of sewage sludge, from thickening to digestion to drying beds.
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Presentation Transcript
Disinfection is the process in which pathogenic organisms are destroyed. Common method of disinfection a. Physical action: 1. Heat 2. Ultraviolet light 3. Ultrasonic
B. poisons or inhibitors 1. Metalic ions 2. Certain halogens C. Oxidizing agent a. Chlprine b. Ozone c. Potassium permenganate d. Hydrogen peroxide.
Factors affecting disinfection 1. Time of contactr 2. Concentration of disinfectant 3. Temperature.
Chlorine chemistry : 1. First used in 1902 for water treatment 2. Used in 1924 in baghdad 3. Available in many forms.
Forms of chlorine: 1. Free available chlorine. 2. Combined available chlorine
Sludge treatment Sewage sludge consist of organic and inorganic solids The specific gravity of in organics is 2.5 while organic matte has a specific gravity of 1.01; Approximatly, 60% of suspended solids will be removed in primary clarifier.
Sludge treatment Thickening
