Problem Solved: Detention Time - Water Treatment Math

American Water College presents - Problem Solved!

This is a solution to a typical detention time problem, found on state certification exams. It is also an important calculation for treatment plant operators.

[HectorWPadilla]

I find the videos very helpful, but i feel that towards the end of many of your math examples the instructor often skips key steps to understanding the concept: E.G ... When finding the VOL instead of converting the VOL RESULT of  127, 018 GAL to .127 MG, why not keep it at 127, 018 GAL for VOL.  

For FLOW, take 1MGD, and simplify it  such as:

1MGD = (1, 000, 000 GAL/DAY) * ( DAY/ 24 HRS) = 41, 666 GAL/HR for FLOW

PUTTING IT TOGETHER: 

DT = VOL ( GAL) / FLOW (GAL/HR) 

DT = (127, 018 GAL) / (41, 666 GAL/ HR )
 
DETENTION (DT) = 3 HOURS

* another thing, write the units no matter how much of a given they may be- such as 8.34 Lbs/gal

[sopheap]

I am a master student in environmental engineering. I find that these courses are really helpful to my studies.

[robertrodriguez]

Im new to this field, and currently taking distribution courses. These videos are so helpful, Thanks for posting them up.

[messiejessie]

Thank you for posting this! I'm taking water treatment and distribution classes and finals are next week. This was so helpful!

[sharpshooter]

Started studying water treatment about a month ago. This was extremely helpful. Thank you so much for creating this video!

[imbrandon]

Taking my D2 for the 2nd time tomorrow morning. Wish me luck. I feel much more confident this time since i know what to expect.

[AmericanWaterCollege]

We're glad you find them helpful! Welcome to the water industry. It is a great field, full of opportunities.

[tyronemckinley]

Easy to understand and very clear on steps to take. Thanks

[MasterCivilEngineering]

Step by step video solutions of civil engineering questions

[YG-tcrs]

Simple n awesomely solved Sir, thankyou so much 😊

[johnsonjayaraj]

How did you arrive at the formula to find volume of the tank ?

[zzytrewq]

The easiest way I used to get operators to understand detention time was to describe as the time it takes to fill a tank at the stated flow.

[lisro]

Thank you so much...please post more videos if you got them.

[littleteethkeith]

I'm taking the Class 4 exam tomorrow for like the 30th time. Pray for me.

[Self_Supremacy]

Thank youbfor the problems and the instructions.

[ttenisi]

thank you very much for all the great help

[walterparker]

Is the formula used to calculate the volume standard? Is that something i'm supposed to know already? I'm screwed!

[lymersteve]

im Canadian so 2 and half hours detention time using imperial units...just saying what is the standard that is international? i think is Imperial

[Tarikuslol]

Thanks for making this video, helped me double check that I'm not crazy and that I was using the right formula lol

[kmutech]

hallo sir i heartly request you please upload videos regarding high rise building piping calculation such as water, sawage, calculations