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 F, ν = 1.217 x 10-5 ft2/s

 

Water Properties:

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

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