EARTHSC 2WW3 Lecture Notes - Lecture 8: Chlorine, Disinfectant
28 Apr 2014
School
Department
Course
Professor
Document Summary
Desalination: desalinisation is a relatively new technology used in california, saudi arabia, florida, etc , relatively high costs ( per acre foot, expensive, use a lot of energy and is environmentally hazardous, the issue is that many of the countries with a need for a desalination plant cannot afford them, take polluted water, put it away from water sources and evaporate it, what happens to the salt, make salt products such as epsom salts, also have brine" (salty water) left which has no oxygen and is heavier than salt water, must be dispersed and not simply dumped in calm water. Problems: cost for poorer countries, uses a lot of energy, the extreme saline waste, new solutions needed to decrease energy use and cost, ie. solar polar (self sufficiency) Potable water treatment steps: preliminary treatment, screening and settling, coagulation and flocculation, after storage on fine particles remain, the particles have a negative charge, clarification.
