Potable Water - correct answer Water that is healthy for human consumption, and free of organic and inorganic compounds and microorganisms
Palatable
... [Show More] Water - correct answer Water that is aesthetically pleasing and free from turbidity, color, odor, or bad taste
Turbidity - correct answer Measures clarity of water; whether water is cloudy or not
What is the purpose of drinking water treatment? - correct answer To provide potable water that is palatable
Major Inorganic Constituents - correct answer Calcium, chloride, fluoride, iron, magnesium
Minor Inorganic Constituents - correct answer Copper, lead, arsenic, mercury
Microbial Constituents - correct answer Pathogens, indicator organisms
Pathogens - correct answer Microorganisms that cause sickness and disease such as viruses, bacteria, and protozoa
Indicator Organisms - correct answer Coliforms, used to monitor microbial water activity
Safe Water Drinking Act of 1974 - correct answer Responsibility of water quality regulation moved from states to EPA. Regulated maximum contaminant levels (MCLs), calcium levels, etc.
Screening - correct answer A physical treatment that removes the large particles from water, by size from largest to smallest in order to prevent damage to mechanics in further treatment. Screening occurs using bar racks or bar screens.
Comminutor - correct answer Alternative to screens; grinds up coarse solids to be removed in a later treatment step
Drinking Water Treatment - correct answer Physical Treatment: Screening, Sedimentation, and Filtration
Chemical Treatment: Coagulation-Flocculation and Disinfection
Order: Screening, Coagulation-Flocculation, Sedimentation, Filtration, Disinfection
Coagulation - correct answer Charge neutralization step that conditions all matter by adding coagulants (chemical that destabilizes particles)
Flocculation - correct answer Small suspended particles stick together from the coagulant to form larger particles known as floc
Sedimentation - correct answer Process in which majority of the particles will settle by gravity within a reasonable time and be removed
Filtration - correct answer Water passes through filtration medium, removes small particles, pathogens, and flocs
Granular Media Filtration - correct answer Can operate at high or low hydraulic loading rate, water is driven by gravity flow through a bed of granular material, and particles are collected within the bed
Membrane Filtration - correct answer Water is pumped under pressure into a housing containing a semipermeable membrane, where some water filters through that membrane. Filters from largest to smallest, and processes increase in pressure.
Microfiltration - correct answer Membrane filtration: Filters particles, sediment, algae, protozoa, bacteria [Show Less]