Yellow
The digester is feed by which process?
Gravity Thickener
What is the capacity of digester 3?
315,900 gallons
What is the formula for volatile solids reduction?
In – Out / In – (In x Out) x 100
How many diffusers are in digester 2?
72
What is the minimum SRT and temp we can have in the digester?
16 days @ 26c
What class of sludge does our digester produce?
Class B
What horsepower are digester blowers 1 2 & 3?
54 hp
Are the air diffusers in the digesters fine or coarse bubble diffusers?
Coarse Bubble
How many diffusers are in digester 3?
96
How many gallons are in a foot for digester 3?
15,867 gallons
What does VSR stand for?
Volatile Solids Reduction
What horsepower are digester blowers 4 & 5?
125 hp
Calculate the VSR: In volatile solids 80%, Out volatile solids 70%?
42% VSR
Which PLC controls digester blowers 1 – 3?
PLC 1
What is the target solids concentration of digester 3?
1.5% - 2.0%
What is the minimum VSR we can have from the digester?
38%
What is the CFM output of digester blowers 4 & 5?
1650 CFM
What pressure are the pressure relief valves on digester blowers 4 & 5 set to release at?
11 psi
Which PLC controls digester blowers 4 & 5?
PLC 4
What is the number 1 cause of foaming in an aerobic digester?
High organic loading
What is the capacity of digesters 1 & 2 (each)?
236,900 gallons
What is the pump capacity of the old digester pumps?
120 gpm
How many diffusers are in digester 1?
120
What is the current SRT of our digester?
38 days
What is the target volatile solids percent in the digester?
70% or less