Module 3.0 Water Treatment & Supply

Who’s Who? n What molecule is considered absolutely essential to life (as we know it) on this planet? n What molecule is called the “universal solvent”? n What molecule do we as humans depend heavily upon in our daily lives? … H 2 O...

Obj 3.1: Who uses water? We do. n Municipal uses: –drinking –fire-fighting –cooking –cleaning –personal hygiene

Obj 3.1: Who uses water? n Agricultural uses: –irrigation –livestock n Manufacturing uses: –food production –steel-making –heating/cooling/cleaning processes

Obj 3.1: Who uses water? n Recreational uses: –pools –conservation areas –boating n Commercial uses: –shipping –transportation

Obj 3.1: Who uses water? n natural uses: –fish –wildlife –plant life n power generation: –hydro-electric power –nuclear power plant cooling

Who consumes water? We do, but… n The water we consume must be potable water … clean and free of pathogens n The wastewater we create must be treated in some way before returning to the environment n Both steps require a “system”

Obj 3.2: Water Treatment and Supply System n Deliver potable water to the consumer for consumption with adequate: –quality –quantity –pressure kPa ( psi)

Obj 3.2: Water Treatment and Supply System n Provide water for fire-fighting at adequate: –flow rates litres/s –pressure

Obj 3.3: Steps n Demand: How much water is needed? n Supply: Where does the water come from? What type of treatment does it need? n Distribution: How does it get to the consumer? How do we maintain quality, quantity and pressure?

Obj 3.3: Demand n design year n existing and future population data n daily consumption per person n land use and density information n commercial, industrial, institutional uses n Determining the need for water.

Obj 3.3: Supply n ground water or surface water n treatment needed n impacts of withdrawing water n topography n soil and rock type n permeability n hydro-geology n Finding a supply of water?

Obj 3.3: Distribution n location of consumers n location of treatment plant n topography n suitable reservoirs, storage, towers n means of providing pressure n road network, pipes n Designing a water distribution system?