Guess the HP

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Ingenieur

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Earth
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what say ye

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gadfly56

gadfly56

Senior Member
Location
New Jersey
Occupation
Professional Engineer, Fire & Life Safety
OK, second run at it using the online calculator I found here. Using a PF of 0.92, the answer is 1,901 HP.
 
J

JFletcher

Senior Member
Location
Williamsburg, VA
Ingenieur said:
within 5%
good guess

Wastewater plant?
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Thank you.Yes. Williamsburg Waste Water Treatment plant, 22.5MGD facility. Huge blowers (for the flow), aeration tanks, and intermediate treatment due to it being designed to treat waste from Anheiser-Busch (InBev). 3 900HP blowers, only one of which ran at a time, usually with the intake vanes set at minimum (around 20% open). Got to see one self destruct once, upon startup it filled the entire blower room (roughly 40' wide x 200' long x 30' high) with what looked like fine glitter - the brushes on the rotor failed.
 
I

Ingenieur

Senior Member
Location
Earth
JFletcher said:
Thank you.Yes. Williamsburg Waste Water Treatment plant, 22.5MGD facility. Huge blowers (for the flow), aeration tanks, and intermediate treatment due to it being designed to treat waste from Anheiser-Busch (InBev). 3 900HP blowers, only one of which ran at a time, usually with the intake vanes set at minimum (around 20% open). Got to see one self destruct once, upon startup it filled the entire blower room (roughly 40' wide x 200' long x 30' high) with what looked like fine glitter - the brushes on the rotor failed.
Click to expand...


Yeast/BOD is a plant killer
like dairy waste

good size plant >20 mgd
my experience 1-5 mgd
I have a Class A operators license but did design not operation
it is a cool process and the output/product ie water is amazingly clean
usually better than the recieving stream

must have sounded like a bomb when it let go lol
 
J

JFletcher

Senior Member
Location
Williamsburg, VA
Ingenieur said:
Yeast/BOD is a plant killer
like dairy waste

good size plant >20 mgd
my experience 1-5 mgd
I have a Class A operators license but did design not operation
it is a cool process and the output/product ie water is amazingly clean
usually better than the recieving stream

must have sounded like a bomb when it let go lol
Click to expand...

Yeah brew waste can approach 200,000mg/l BOD. Dairy waste is hard to treat as well. I have (had) a Class 1 VA WW license myself; let it lapse in 2012. Inbev pretreats now tho I remember one shift pulling a 12.6ph on my raw sample. :blink:

You can drink the effluent w/o getting sick but ofc it's not recommended. I did operations, and after running Nansemond for a year during and after its upgrade I really wanted to be an engineer (the plant had a very unfriendly layout and Westinghouse DCS system). That plant had BNR (Biological Nutrient Removal). It also had 6 26kw lighting towers that all came on at the same exact time, which played havoc with the centrifuges and blowers. I wonder if they ever solved that problem haha.

The blower or motor didnt come apart or anything spectacular like that; I caught it before that happened. I did see a 150HP ID fan weld itself together, which was pretty spectacular, seeing the outboard bearing glowing in the relative dark, wondering what kind of friction was required in a 4" OD bearing to bring a 5' 700lb fan wheel from 1800rpm to zero in a few screeching second.
 
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