Water Treatment Statements Flashcards
The most common disinfection byproduct produced when adding chlorine to water containing natural and inorganic matter is _________?
Chloroform
_____ will most likely cause taste and odors, slime, and filter clogging.
Blue-Green Algae
Rapid sand filters can handle higher filtration rates when compared to slow sand filters because they have _____.
Coarser Sand
Iron bacteria can interfere with stabilization because the bacteria produce a _____ that prevents the stabilization chemicals from reaching the pipe surface.
Slime Layer
Hypochlorous acid is favored over hypochlorite the hypochlorite ion when the pH is _____ and the temperature is _____.
Low; Low
_____ filters have unstratified media distribution.
Slow Sand
The combined chlorine residuals at pH values ranging from 6.5 - 8.5 are _____ and _____.
Monochloramine; Dichloramine
When iron alone is treated using manganese greensand filters, the chlorine feed rate should be about _____ to _____ times the iron concentration.
1.0 to 1.2
When disinfecting with chloramines, ammonia can be added to the process _____ the chlorine.
Before, At the Same Time, or After
Chlorination of water that has high concentrations of natural organic matter will produce _____.
THMs
_____ will settle out of the water in a short period of time.
Very Fine Silt
Point-of-use activated carbon filters are most effective for removing _____.
Chlorine
Potassium permanganate is used as an oxidant for control of ______.
Tastes & Odors
Organic DBP Precursors
Iron & Manganese
The USEPA Stage 1 Disinfectants and Disinfection Byproduct Rule established the maximum contaminant levels for Haloacetic Acids of ______.
60 ug/L
