Civil PE Exam - Water Resources Depth - BOD Efficiency

[@brittanydarnell6546]

Wouldn’t you be able to just skip steps 3 & 4 and just take (15mg/L-10.64mg/L)/15mg/L to get 29%? There’s a lot of extra factors that get divided out in converting to mass.

[@ShrekFan5670]

That's also how I ended up solving it!

[@anniefeng3795]

I was going to ask the same thing! Is there a reason he did that?

[@BolfSwagg]

@@anniefeng3795 no it was a waste of time.

[@whiskeybravo91]

that's what I did as well, gotta remember that you've only got 6 minutes per problem

[@voejoe_pokemon]

Yes :)

[@avidaPE]

So the plant discharges 30 cfs into a stream that typically carries 2.5 cfs? That seems a little strange from a design point of view. Usually these problems have the discharge flow rate several orders of magnitude lower than the stream flow rate.

[@premiumroyale945]

Yes, correct. This video hurts to watch. The problem is super unrealistic, and is also solved poorly. @brittanydarnell6546's comment describes how you should be solving this problem.

[@tobinmorse9964]

and said miligrams per day instead of million gallons per day. I know things like this are hard to put together but this was a bad one.