drinking water quality and water treatment. learning objectives identify the major pieces of...
TRANSCRIPT
![Page 1: Drinking Water Quality and Water Treatment. Learning Objectives Identify the major pieces of legislation that protect water quality in the United States](https://reader036.vdocuments.mx/reader036/viewer/2022062713/56649cdb5503460f949a56d1/html5/thumbnails/1.jpg)
Drinking Water Qualityand Water Treatment
![Page 2: Drinking Water Quality and Water Treatment. Learning Objectives Identify the major pieces of legislation that protect water quality in the United States](https://reader036.vdocuments.mx/reader036/viewer/2022062713/56649cdb5503460f949a56d1/html5/thumbnails/2.jpg)
Water Quality Issues
Is the water we’re drinking safe?
How is it treated to ensure safety?
Can we swim and fish in our rivers?
Safe Drinking Water Act, 1974
Clean Water Act, 1972Both have been amended several times since!visit www.epa.gov/ogwdw
![Page 3: Drinking Water Quality and Water Treatment. Learning Objectives Identify the major pieces of legislation that protect water quality in the United States](https://reader036.vdocuments.mx/reader036/viewer/2022062713/56649cdb5503460f949a56d1/html5/thumbnails/3.jpg)
Drinking Water Standards5.10
Sometimes the goal isn’t practical
![Page 4: Drinking Water Quality and Water Treatment. Learning Objectives Identify the major pieces of legislation that protect water quality in the United States](https://reader036.vdocuments.mx/reader036/viewer/2022062713/56649cdb5503460f949a56d1/html5/thumbnails/4.jpg)
International Water Supplies
WHO/UNICEF Joint Monitoring Programme for Water Supply and Sanitation
http://www.wssinfo.org/en/22_wat_global_en.html#
![Page 5: Drinking Water Quality and Water Treatment. Learning Objectives Identify the major pieces of legislation that protect water quality in the United States](https://reader036.vdocuments.mx/reader036/viewer/2022062713/56649cdb5503460f949a56d1/html5/thumbnails/5.jpg)
Water Supplies in Southcentral Asia
Turkmenistan
Afghanistan
![Page 6: Drinking Water Quality and Water Treatment. Learning Objectives Identify the major pieces of legislation that protect water quality in the United States](https://reader036.vdocuments.mx/reader036/viewer/2022062713/56649cdb5503460f949a56d1/html5/thumbnails/6.jpg)
Source: http://www.wssinfo.org/en/335_san_asiaSC_en.html
Sanitation in Southcentral Asia
![Page 7: Drinking Water Quality and Water Treatment. Learning Objectives Identify the major pieces of legislation that protect water quality in the United States](https://reader036.vdocuments.mx/reader036/viewer/2022062713/56649cdb5503460f949a56d1/html5/thumbnails/7.jpg)
How is Drinking Water Treated to Make It Safe?
Disinfection technologies:
• chlorination (Cl2, NaOCl, or Ca(OCl)2)
• ozonation (O3)
• UV radiation
Fluoridation – to prevent tooth decay
![Page 8: Drinking Water Quality and Water Treatment. Learning Objectives Identify the major pieces of legislation that protect water quality in the United States](https://reader036.vdocuments.mx/reader036/viewer/2022062713/56649cdb5503460f949a56d1/html5/thumbnails/8.jpg)
Instrumentation and Measurement of Water Pollutants
• Atomic absorption spectroscopy is commonly used to measure metals (e.g. lead)
• Gas chromatography is commonly used to measure organic compounds (e.g. benzene)
![Page 9: Drinking Water Quality and Water Treatment. Learning Objectives Identify the major pieces of legislation that protect water quality in the United States](https://reader036.vdocuments.mx/reader036/viewer/2022062713/56649cdb5503460f949a56d1/html5/thumbnails/9.jpg)
Gas Chromatograph
![Page 10: Drinking Water Quality and Water Treatment. Learning Objectives Identify the major pieces of legislation that protect water quality in the United States](https://reader036.vdocuments.mx/reader036/viewer/2022062713/56649cdb5503460f949a56d1/html5/thumbnails/10.jpg)
Hard Water
• contains dissolved minerals such as CaCO3
• Is hard water good or bad?
– calcium is good for your bones, right?– causes deposits on pipes, industrial equipment– interferes with soaps
![Page 11: Drinking Water Quality and Water Treatment. Learning Objectives Identify the major pieces of legislation that protect water quality in the United States](https://reader036.vdocuments.mx/reader036/viewer/2022062713/56649cdb5503460f949a56d1/html5/thumbnails/11.jpg)
Water Treatment Technologies
• Water softening (by ion exchange)
Na2Z (s) + Ca2+ (aq) CaZ (s) + 2 Na+ (aq)
sodium zeolite calcium zeolite
• Distillation
• Reverse Osmosis
• Carbon Adsorption
![Page 12: Drinking Water Quality and Water Treatment. Learning Objectives Identify the major pieces of legislation that protect water quality in the United States](https://reader036.vdocuments.mx/reader036/viewer/2022062713/56649cdb5503460f949a56d1/html5/thumbnails/12.jpg)
Distillation
![Page 13: Drinking Water Quality and Water Treatment. Learning Objectives Identify the major pieces of legislation that protect water quality in the United States](https://reader036.vdocuments.mx/reader036/viewer/2022062713/56649cdb5503460f949a56d1/html5/thumbnails/13.jpg)
Reverse Osmosis Systems
![Page 14: Drinking Water Quality and Water Treatment. Learning Objectives Identify the major pieces of legislation that protect water quality in the United States](https://reader036.vdocuments.mx/reader036/viewer/2022062713/56649cdb5503460f949a56d1/html5/thumbnails/14.jpg)
Carbon Adsorption
![Page 15: Drinking Water Quality and Water Treatment. Learning Objectives Identify the major pieces of legislation that protect water quality in the United States](https://reader036.vdocuments.mx/reader036/viewer/2022062713/56649cdb5503460f949a56d1/html5/thumbnails/15.jpg)
Wastewater Treatment
• Primary Treatment• Secondary Treatment• Tertiary Treatment
![Page 16: Drinking Water Quality and Water Treatment. Learning Objectives Identify the major pieces of legislation that protect water quality in the United States](https://reader036.vdocuments.mx/reader036/viewer/2022062713/56649cdb5503460f949a56d1/html5/thumbnails/16.jpg)
Primary Treatment
• Removes large objects from the water– Sticks– Tires– Trash
• Screening• Primary Settling (physical)
![Page 17: Drinking Water Quality and Water Treatment. Learning Objectives Identify the major pieces of legislation that protect water quality in the United States](https://reader036.vdocuments.mx/reader036/viewer/2022062713/56649cdb5503460f949a56d1/html5/thumbnails/17.jpg)
Secondary Treatment
• Uses biologically activated organisms to consume nutrients and other organic constituents
• Aerobic digestion– Uses organisms that thrive with oxygen– Produce CO2
• Anaerobic digestion– Uses organisms that thrive without oxygen– Produce CH4
• Final settling (physical)
![Page 18: Drinking Water Quality and Water Treatment. Learning Objectives Identify the major pieces of legislation that protect water quality in the United States](https://reader036.vdocuments.mx/reader036/viewer/2022062713/56649cdb5503460f949a56d1/html5/thumbnails/18.jpg)
Tertiary Treatment
• Whatever chemical treatment of remaining water is required
• Usually includes disinfection (e.g. with chlorine)• Can include other chemical treatments depending
on the sources of the wastewater
![Page 19: Drinking Water Quality and Water Treatment. Learning Objectives Identify the major pieces of legislation that protect water quality in the United States](https://reader036.vdocuments.mx/reader036/viewer/2022062713/56649cdb5503460f949a56d1/html5/thumbnails/19.jpg)
![Page 20: Drinking Water Quality and Water Treatment. Learning Objectives Identify the major pieces of legislation that protect water quality in the United States](https://reader036.vdocuments.mx/reader036/viewer/2022062713/56649cdb5503460f949a56d1/html5/thumbnails/20.jpg)