improving water quality purification of drinking water general process: collected from reservoir or...
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Improving Water Quality
Purification of Drinking Water
General process:
Collected from reservoir or ground water.
Improving Water Quality
Purification of Drinking Water
General process:
Water treated
YouTube - The water treatment process
Improving Water Quality
Purification of Drinking Water
Water treatment includes:
1. Treatment with a coagulant
2. Filtration
3. Activated carbon
4. Disinfection
5. fluoridation
Improving Water Quality
Water Treatment Plant
Improving Water Quality
Purification of Drinking Water
Disinfection can be one of the following:
1. Chlorine
2. Ozone
3. UV-light
Improving Water Quality
Purification of Drinking Water
General process:
Distributed to customersWastewater collected as sewage
Improving Water Quality
Purification of Drinking Water
General process:
Sewage treated
Improving Water Quality
Videos:
YouTube - "where does it go?" THE MOVIE
YouTube - What happens when you flush?
YouTube - Waste Water Treatment Made Simple...
YouTube - California plant turning raw sewage into drinking water
Improving Water Quality
Municipal Sewage Treatment
Primary treatment – removal of suspended and floating particles by mechanical processes such as screening and gravitational settling.
Improving Water Quality
Municipal Sewage Treatment
Secondary Treatment –Biological decomposition of suspended
organic matter
Tertiary Treatment -Variety of biological, chemical, and physical
processes used to remove minerals, heavy metals, viruses, organic compounds, nitrogen, phosphorus, etc.
Improving Water Quality
Municipal Sewage Treatment
Primary and Secondary Sewage Treatment
Improving Water Quality
Municipal Sewage Treatment
Effectiveness of primary, secondary, and tertiary sewage treatment
Improving Water Quality
Municipal Sewage Treatment
• Major problem associated with wastewater treatment is disposal of sludge
• Can be used as fertilizer, but there may be health risks (e.g., heavy metal poisoning)
• Used to be dumped in ocean. That is now banned
• Currently, most is dumped in landfills
Improving Water Quality
Individual Septic Systems
Septic tank
Improving Water Quality
Individual Septic Systems
Drain field