10 notecards = 3 pages (4 cards per page)
To control the settling characteristics of the suspended particles, what should the operator adjust?
The chemical coagulant dose and the coagulation flocculation process
The tendency of the water to flow at the inlet velocity straight
Which statement is true about treating colder water?
The colder the water, the longer it takes particles to settle out
Floc carryover from the sedimentation basin will cause what problem?
Premature clogging of the filters and degraded finished water quality
A settling tank at a water plant is 125 feet long, 65 feet wide and operates at a depth of 12.5 feet. How many gallons does the tank contain?
What is the purpose of the sedimentation process?
Remove suspended solids that are denser than water and to reduce the load on the filters
As water temperature decreases, the operator should be prepared to take what action to increase efficiency of the sedimentation process?
Reduce the flow through the basin to increase detention time
What is the name of the unit that combines coagulation, flocculation and sedimentation processes into a single basin and may be either rectangular or circular in shape?
Upflow, solids contact clarification
During normal operation of the sedimentation process, operators
Turbidity and temperature
A circular clarifier is 98 feet in diameter with an operating depth of 11 feet. Calculate the surface area
7,539 sq ft