Exam 3 - Summer, 2004 - c) Draw the curve, labeling x and y...

Info iconThis preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon
Introduction to Environmental Engineering CE 350 – Exam 3 Summer, 2004 Time Limit (50 minutes) 1. Define the following terms. (14 points) Procaryote Bacteria; Absent of membrane bound organelles & nucleus; unicellular organism Heterotrophic – Obtain both energy and carbon from organic matter Photoautrophic – requiring sunlight as an energy source Psychrophilic – grow best at 0 – 30 ° C Thermophilic – grow best at > 40 ° C Facultative – grow with or without oxygen Microaerophilic – grows in the presence of very small quantities of oxygen 2. Sketch a typical growth curve for bacteria as a function of temperature. (7 points)
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
3. List three main differences between eutrophic and oligotrophic lakes. (6 points) 4. Draw a typical bacterial growth curve, labeling the phases. (10 points)
Background image of page 2
5. Describe three methods used to directly or indirectly measure dissolved organic material in water. (9 points)
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
6. a) What is the Monod equation? (3 points) b) How was it determined? (1 point)
Background image of page 4
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 6
Background image of page 7
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: c) Draw the curve, labeling x and y axes, K s , and max . (4 points) d) How does Ks relate to biodegradability? (2 points) 7. Estimate the COD, TOC and ultimate BOD, mg/L, of a solution that is made by dissolving one teaspoon of sugar, C 6 H 12 O 6 , (6 grams) in 1.00 liter of distilled water. [C = 12 g/moles, O = 16 g/moles, H = 1 g/moles] (10 points) 8. Sketch an oxygen sag curve and indicate on it: (9 points) a. The stretch of river for which rate of deoxygenation exceeds the rate of reaeration. b. The stretch of river for which rate of reaeration exceeds the rate of deoxygenation. c. The point at which the two rates are equal. 9. Calculate the number of unicellular bacteria grown from a population of 100 at time zero after 48 hours of growth. Assume that the lag period is hour and the generation doubling time is 20 minutes and that exponential growth takes place for the entire growth period. (10 points) 10....
View Full Document

This note was uploaded on 01/06/2011 for the course CE 350 taught by Professor Nies,l during the Spring '08 term at Purdue University-West Lafayette.

Page1 / 7

Exam 3 - Summer, 2004 - c) Draw the curve, labeling x and y...

This preview shows document pages 1 - 7. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online