View the step-by-step solution to:

Question

This question was created from CVG 2132-Lec 13 - Water Quality - Editted.pptx https://www.coursehero.com/file/48516246/CVG-2132-Lec-13-Water-Quality-Edittedpptx/

48516246-383890.jpeg
48516246-383890.jpeg

Example: The only source of BOD in a river is untreated wastes that are being
discharged from a food processing plant. The resulting oxygen sag curve has a
minimum DO value of 3.0 mg/L somewhere downstream of the discharge. The DO of
the food processing waste is sufficiently high and the DO of the river at the discharge
location remains at saturation. The water temperature of the mixed stream is 15.5 C.
(a) Find the location of the lowest DO value downstream of the discharge. The
reaeration coefficient is equal to 0.80/day and the deoxygenation coefficient is
0.20/day. The average velocity of the stream is 96,560 m/d.
(b) What is the ultimate BOD at the point of mixing between the stream and the
discharge?
(c) What is the ultimate BOD at the point of mixing between the stream and the
discharge that is required for the DO to remain above 5 mg/L and enable a
"healthy" aquatic community to be maintained through the entire stream.
(d) What level of wastewater treatment plant (primary, secondary or tertiary) is
required to treat this waste?

Recently Asked Questions

Why Join Course Hero?

Course Hero has all the homework and study help you need to succeed! We’ve got course-specific notes, study guides, and practice tests along with expert tutors.

  • -

    Study Documents

    Find the best study resources around, tagged to your specific courses. Share your own to gain free Course Hero access.

    Browse Documents
  • -

    Question & Answers

    Get one-on-one homework help from our expert tutors—available online 24/7. Ask your own questions or browse existing Q&A threads. Satisfaction guaranteed!

    Ask a Question
Let our 24/7 Civil Engineering tutors help you get unstuck! Ask your first question.
A+ icon
Ask Expert Tutors You can ask You can ask ( soon) You can ask (will expire )
Answers in as fast as 15 minutes
A+ icon
Ask Expert Tutors