E10_F09_Module_CEE_Assign_04_B - University of California,...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
University of California, Berkeley E10 Fall 2009 S.W. Hermanowicz Module CEE E10 Engineering Design and Analysis Module B CEE Assignment No. 4 Assignments #1 and #2 are due in the week 11/16 during your discussion sections. You will have an opportunity to work more on your assignment #2 before the final submission as a part of the final report (#3). 1. Individual Assignment The MPN procedure described in the class works uses only one volume of water V and only works for a relatively small range of concentrations. In practice, a more involved test is used that uses five 10-mL volumes, one 1-mL volume, and one 0.1-mL volume. You ran the test and obtained the following results: 4 out of 5 10-mL tubes were positive, the 1-mL tube was negative and the 0.1-mL tube was positive. Calculate the MPN expressing it in cells/100 mL. Hint : now we have three 8 related to three volumes of water but still only one value for the (unknown) concentration C. Start with C values in the range of 0.1 to 0.3 cells/mL. If we assume that in raw, undisinfected water bacterial concentration is 10 cells/L, what is the 6 disinfection efficiency (N/N0)? 2. Team Assignment (submit as an appendix with your final technical report) Characteristics of a commercially available UV lamp (Philips 4W, Germicidal* Sterilamp®
Background image of page 1

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

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 02/09/2010 for the course ENGIN 10 taught by Professor Johnson during the Fall '08 term at Berkeley.

Page1 / 2

E10_F09_Module_CEE_Assign_04_B - University of California,...

This preview shows document pages 1 - 2. Sign up to view the full document.

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