Drinking Water Treatment Processes 2023 updated to pass

Drinking Water Treatment Processes 2023 updated to passSURFACE WATER TREATMENT RULE APPLIES TO: - correct answer surface and certain ground waters. DRINKING WATER TREATMENT PROCESSES SURFACE WATER TREATMENT RULE REQUIRES: - correct answer Removal of specific microbes by 2-, 3-, and 4- logs; monitoring of turbidity, and watershed protection. WATERSHED PROTECTION: - correct answer includes enactment of rules and regulations and regular periodic surveillance and inspections. These rules and regulations are legal means to control land use that might cause pollution of the water draining off and into the watershed of the water supply source. (Salvato, pg. 285) GENERAL PRINCIPLES OF SURFACE WATER TREATMENT: - correct answer coagulation, flocculation, sedimentation, filtration, disinfection. COLLOIDS: - correct answer small particles that remain suspended in solution. (356B, pg. 27) COAGULATION: - correct answer destabilizing of suspended colloids by adding a coagulant (such as alum). (Salvato, pg. 388) FLOC: - correct answer small particles aggregated into larger masses that easily settle out of solution. Tends to be white in color and sticks to particulates. (356 B, pg. 27) FLOCCULATION: - correct answer formation of floc. (356 B, pg. 27) SEDIMENTATION: - correct answer gravitational settling (flocculant settles out of solution) (356B, pg. 27) COAGULATION AND PH: - correct answer alkalinity and pH (chemical reaction) impact coagulation; therefore, it is sometimes necessary to first add soda ash, hydrated lime, quicklime, or sulfuric acid. Color is best removed at a pH of 6.0 to 6.5. (Salvato, pg. 388) SYNTHETIC POLYMERS: - correct answer added with sodium silicate and polyelectrolytes as coagulant aids to improve coagulation and floc strength, usually resulting in less sludge and lower chemical doses. (Salvato, pg. 388) FILTRATION: - correct answer primary purpose is to remove suspended materials, although microbiological organisms and color are also reduced. (Salvato, pg. 390) TYPES OF FILTERS: - correct answer slow sand, rapid sand, mixed-media, bag, reverse osmosis (Study guide)