- 54 students
- 30 lessons
- 0 quizzes
- 32 week duration
Physico-chemical treatment is applied mostly for industrial waste of chemical character. Contaminated water contains particles of different sizes which can be classified as dissolved (< 0.08 μm), colloidal (0.08 – 1 µm), supracolloidal (> 100 – 100 mm) and settleable (> 100 µm) (1 and 2). The type of treatment selected depends on the size of particles present in the wastewater. In practice, treatment efficiency also depends on particle size.
One of the first steps to consider in waste treatment is seperation, which can save tremendous amount of effort and expense by re segregating wastes in forms that can be treated most economically or which may be not even hazardous. Separation may be as simple as draining an aqueous layer from organic one in two-phase waste.
Water Quality and Purification
Physical, chemical and biological parameters of water- Water Quality requirement – Potable water standards -Wastewater Effluent standards -Water quality indices. Physical processes-chemical processes and biological processes-Primary, Secondary and Tertiary treatment-Unit operations-unit processes.
- Physical Parameters of Water
- Chemical Parameters of Water
- Organic Indicators of water quality
- Biological Parameters of water quality
- Water Quality Requirement
- Potable Water standards
- Waste water effluent standards
- Physical, Chemical & Biological processes
- Primary, Secondary and tertiary treatment of water
- Unit Operations & Unit Processes
Sedimentation and Disinfection
Types, Aeration and gas transfer, Coagulation and flocculation, coagulation processes - stability of colloids - destabilization of colloids transport of colloidal particles, Clariflocculation. Theory of Disinfection - Factors affecting disinfection, Disinfection - chlorine dioxide; chloramines; ozonation; UV radiation.
Theory of granular media filtration; Classification of filters; slow sand filter and rapid sand filter; mechanism of filtration; modes of operation and operational problems; negative head and air binding; dual and multimedia filtration, pressure filters, principle of working and design.
Ion Exchange-processes, Application of Membrane Processes, Reverse Osmosis, Microfiltration, Nano-filtration, Ultrafiltration and Electrodialysis.
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