Purcellville 1
A sludge of microorganisms is also called what?
Mixed Liquor
At what depth are the diffusers in the aeration basins?
14 feet
What is the design average flow of one aeration basin?
1.5 mgd
What is the volume of 1 post anoxic basin?
114,000 gallons
What flow rate are the waste pumps set at?
100 gpm
What bacteria is responsible for converting ammonium to nitrite?
Nitrosomonas
How many pounds of oxygen are required to oxidize 1 pound of BOD?
1 pound
What is the design peak flow with 2 basin in service?
3.0 mgd
How is the RAS flow figured?
2 to 4 times the influent flow rate
What is the best pH range for nitrification?
6.5 to 7.5
What bacteria is responsible for converting nitrite to nitrate?
Nitrobacter
How many pounds of oxygen are required to oxidize 1 pound of TKN?
4.6 pounds
What is the volume of the pre anoxic on one of the aeration basins?
81,000 gallons
How many gallons a day are we currently wasting?
About 23,000 gallons
Is alkalinity generated or consumed in the nitrification process?
Consumed
Our MBR plant is designed to operate as what type of process?
Modified 4-Stage Bardenpho
What is the horsepower rating on aeration blowers 1, 2 & 3 for slow and fast?
25 hp slow, 40 hp fast
What is the total volume of 1 aeration basin?
319,200 gallons
What horsepower are the post anoxic lift pumps?
20 hp
What gasses are generated in the denitrification process?
Nitrogen (N) Nitrous Oxide (N2O)
How big is the pipe from the EQ basin to the aeration influent?
16 inch
What is the horsepower rating on aeration blowers 4, 5 & 6?
125 hp
How many diffusers are in 1 aeration basin?
523
What is the max flow of one lift pump?
2,035 gpm
When and where was the first wastewater facility built?
1804 in Scotland - settling & charcoal filtration