Commercial Desalination - University of San Diego
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Transcript Commercial Desalination - University of San Diego
By: Alyssa Beerling, Frankie Victoria, Joey Seiler,
Melissa Lupinacci
http://www.sciencedaily.com/releases/2010/04/100406093636.htm
What is Desalination?
Misconception of
Desalination
is a process that involves the
Desalination of sea and
removal of brine and other
minerals, such as chemical
compounds from sea water or
brackish water.
Potential Negative Impact
brackish water have offered a
wide rang of human health,
socio-economic, and
environmental benefits by
providing an unlimited and
constant supply of high
quality drinking water
• Impairment of coastal water quality
• Affects on marine life
• Air pollution emissions which are attributed to the energy and
cost demand of the process
Reverse Osmosis
http://coolingtower-design.com/2011/01/25/reverse-osmosis
Distillation
http://www.ag.ndsu.edu/pubs/h2oqual/watsys/ae1032w.htm
Output of Desalination
Plants
Brine
Twice as much salt
Toxic Chemicals
Treatment/Maintanence
Heavy metals
Heated discharge
Impacts
Subtle Changes in the marine
environment can affect it
extensively
Worldwide ocean:
Temperature= 15 to 20
Degrees Celsius
Salinity= 30 to 37 ppt
Affects of brine
Salinity
Chemicals
Thermal pollution
Groundwater is also at risk
http://www.hardrainproject.com/hrpl?n=1178
Source Water Acquisition
Marine Water Intake Issues
Impingement
Entrainment
Brackish Groundwater
Sustainability of the aquifer
Subsidence
Seawater intrusion
Environmental Impacts from
Concentrate Management
Coastal Concentrate Discharge into Oceans, Seas,
Estuaries
Studies of Effects of Concentrate on Specific Marine
Organisms
Case Studies
Sensitivity to Salinity (Rinne, 1971)
Effects of Concentrate on Sea grass (Latorre, 2005)
Economic Costs
Tampa Bay Seawater
Desalination Plant
150 million dollar
operation
Yuma Desalting Plant
245 million dollar
project
Costs of delivery
Efficiency of
desalination
15%-50% efficient
Energy Costs
Solubility properties of
salt
Desalination in Australia
Coal as energy source
Desalination in Saudi
Arabia
Oil as energy source
Environmental toll
Work Cited
http://www.theecologist.org/News/news_analysis/269784/desalination_pr
os_and_cons_of_a_typically_thorny_issue.html
http://www.resources.ca.gov/ocean/97Agenda/Chap5Desal.html
http://www.theoildrum.com/node/5155
http://www.nytimes.com/2010/07/11/world/asia/11water.html?pagewanted
=all
http://www.scientificamerican.com/article.cfm?id=why-dont-we-get-ourdrinking-water-from-the-ocean
http://www.pacinst.org/reports/desalination/desalination_report.pdf
http://www.sciencedirect.com/science/article/pii/S0011916407006005
http://www.sciencedirect.com/science/article/pii/S0011916405006041