Water Treatment
What is filtration?
Removal of particles through media
What is the purpose of a water main?
Transport water through the system
What is primary treatment?
Physical removal of solids
What gas is commonly found in sewers and is toxic?
Hydrogen sulfide
Where is the BCWWA main office?
Burnaby
What is turbidity?
Measure of water clarity
What does a fire hydrant primarily provide?
Emergency water supply and flushing
What is screening in wastewater treatment?
Removal of large debris
What is a manhole used for?
Access to sewer system
What is the BCWWA's monthly online publication?
Waterline
What is filter backwashing?
Cleaning filter media by reversing flow
What is a common method for controlling water hammer?
Slow valve closure
What indicates a filter needs backwashing?
Increased head loss
What maintenance activity prevents sewer blockages?
Routine cleaning and flushing
Name one of the BCWWA's Communities of Practice?
CCC, Drinking Water, Green Infrastructure, SCADA & OT, Source Control, Wastewater
Why is pH important to coagulation?
Affects chemical effectiveness
What device is used to remove air from pipelines?
Air release valve
What is return activated sludge (RAS)?
Biomass returned to aeration tank
What is the purpose of a lift station?
Pump wastewater to higher elevation
What 3 cities does the BCWWA rotate through for hosting the Annual Conference?
Penticton, Whistler, Victoria
High turbidity can reduce disinfection efficiency because it...
Shields microorganisms from disinfectant
Low chlorine residual in a section of the system may indicate...
Stagnation or high demand
High BOD in effluent indicates...
Inadequate removal of organics
A drop manhole is used when...
There is a significant elevation difference between pipes
When is World Water Day?
March 22nd annually