CEE 371

Fall 2009

 

Study Guide for Exam #2

 

Covering lectures #10-26; topics below:

 

Topics

Text

Lecture

Assignments

Water & Wastewater Quality and regulations

·         Water quality parameters, definitions

·         Alkalinity, hardness, oxidant demand, etc

·         Water Quality standards, types of standards, primary, secondary ,etc.

·         Surface Water Treatment Rule

·         Surface water quality management

139-158

10, 11

 

General Drinking Water Treatment

·         Regulations that control DWT

·         Typical Surface Water Process Trains

·         Groundwater treatment

·         Major water quality concerns for surface & groundwater

209-210 242-249

12

 

Disinfection, Disinfectants & DBPs

·         Chick-Watson Law, specific lethality

·         Ct concept

·         Tracer studies, t10

·         Types of disinfectants, role of pH, temp, etc.

·         Chlorine demand, breakpoint chlorination

·         Free, combined, total chlorine

·         Types of DBPs, regulations

·         Ozone, chlorine dioxide, UV

233-249 259-262 416-418

13, 14 , 15

HW #5

Coagulation, rapid mix & flocculation

·         Colloidal stability, role of NOM

·         Major coagulants, aluminum chemistry

·         Rapid Mix design, energy

·         Flocculation design, G and Gt concept

210-213 225-229

16

HW #6

Settling and DAF

·         Basic design & components

·         Theory of discrete settling, Stokes equation

·         Other types of settling

·         Clarifiers; regular & high rate, pre-engineered systems

·         DAF

213-216

17,

HW #6

Filtration

·         Types of filtration

·         Media characteristics, filter design ,underdrains

·         Theory of deposition in filters

·         Backwash

·         Clean bed headloss, headloss development

217-225

18, 19

HW #7

Softening

·         Softening chemistry, stoichiometry

·         Types of processes, flow diagrams

250-255

21

 

Fe/Mn & Corrosion

·         Approaches to Fe/Mn control, stoichiometry

·         Catalytic filtration

·         Pipe corrosion, theory, corrosion products, chemicals for corrosions control

·         Lead problem

255-259

22

 

Special topics

·         Taste & odor: sources, control

·         SOCs, regulations, controls

·         Fluoride

·         Ion exchange, arsenic

·         Adsorption, GAC

·         Membrane filtration

229-233 262-266

20, 23

 

Membrane filtration

·         Types of membranes, flow diagrams, performance

266-274

24,

 

WTP Field Trip

·         Atkins WTP, design, operation

handout

26

 

 

 

 

Instructions provided with Exam

 

Closed Book, two sheets of notes allowed

Please answer questions 4, 5, 9 and 10.  In addition, answer two questions from 1-3 and two from 6-8.  The total potential number of points is 100.  Show all work.  Be neat, and box-in your answer.

 

 

 

 

Special information provided with Exam

 

Conversions

7.48 gallon  = 1.0 ft3              1 gal = 3.7854x10-3 m3

1 MGD = 694 gal/min = 1.547 ft3/s  = 43.8 L/s

1 ft3/s  =  449 gal/min  

g = 32 ft/s2   

W= = 62.4 lb/ft3   = 9.8 N/L

1 hp = 550 ft-lbs/s = 0.75 kW

1 mile = 5280 feet                     1 ft = 0.3048 m

1 watt = 1 N-m/s

1 psi pressure = 2.3 vertical feet of water (head)

At 60 ºF, ν = 1.217 x 10-5 ft2/s  

 

Water Properties:

At 60 ºF, ν = 1.217 x 10-5 ft2/s   , m= 2.359 x 10-5 lb-sec/ft2 ,    = 62.4 lb/ft3

At 10 ºC, ν = 1.306 x 10-6 m2/s   , m= 1.307 x 10-3 kg/m-s ,  ρ = 999.7 kg/m3