CEE 3510 Answer Key Problem Set No. 2 Feb. 17, 2010
1. Rate of mass flow in = Rate of mass flow out + Rate of mass storage. 100 kg/day = (1 kg/day + 2 kg/day) + Rate of mass storage Rate of mass storage = (100 3) kg/day = 97 kg/day. 2. Suspended solids lo
CEE 3510 Prob. Set No. 2 Due: Feb. 17, 2010
1. An industrial plant discharges 100 kg/day of liquids into a disposal pond. Measurements show that 1 kg/day seeps out of the bottom of the pond into the ground and 2 kg/day evaporates into the air. What is the
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End of semester syllabus Lecture Prelim 1
CEE 3510 Environmental Quality Engineering End of Semester Syllubus Spring 2010
Lecture AFR Reactors AFR Reactors Evaluation of Dispersion Coefficients Evaluation of Dispersion Coefficients Contamin
To model pollutant fate we need to: 1. Describe pollutant characteristics [Ex. - need a rate equation for non-conservative materials]. 2. Describe the system [model as appropriate for the degree of exactness desired - CSTR vs. PFR vs. AFR] EXPECTATIONS: c
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Prelim 1 review sessions in HO366:
Friday at 4pm Monday at 5pm
The net effect of dispersion is mass transfer to other fluid elements. This lowers the maximum concentration observed and changes reaction rates for non-conservative materials
Announcements
Prelim 1 review sessions in HO366:
Friday at 4pm Monday at 5pm
The net effect of dispersion is mass transfer to other fluid elements. This lowers the maximum concentration observed and changes reaction rates for non-conservative materials
Prelim 1:Thursday, March 18 7:00 pm Kimball Hall B11
Water quality parameters
Categories Units of expression Primary, secondary Standard vs. criteria
Drinking water standards
Regulation of wastewater
Stream standards Effluent standards Riparian doctrin
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Prelim 1 Quiz 4: Wednesday April 7:
Response equations for CSTR and PFR (no dispersion) to pulse and continuous inputs of conservative materials.
SIMPLIFIED MODELS FOR RIVERS, STREAMS, & AFR'S Recall continuity equation (point form): C = J
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Prelim 1 redos by Monday All late HW can be handed in by last day of classes classes for 50% Quiz 4: Wednesday April 7:
Response equations for CSTR and PFR (no dispersion) to pulse and continuous inputs of conservative materials.
Solution
Expected results C
For a conservative material C = CO downstream i.e , J=
u(1-1) = 0 2E
X=0
Upstream, J = u/E and C = CO eJX, AND X is negative, so C decreases exponentially. For a non conservative material, k 0, and J will be negative downstream, so C de
End of Semester Requests from You
Master equation sheet that summarizes course material More practice problems Harder practice problems Post practice problems online Office hours?
End of Semester Survey
40 35 30 25 20 15 10 5 0 1 2 Choices 1, 2, and 3 3
Useful Equations CEE 3510 Spring 2010
Substrate utilization kinetics
!dS
X where
dt =
kS KS + S
S = substrate concentration " mass vol $ # % k = maximum rate of substrate utilizaton " 1 time $ # % t = time K s = half velocity constant " mass vol $ # % X =
CEE 3510 Practice Prelim 2009 1) 100 kg of toxic substance is discharged instantaneously in a river. The river has a cross-sectional area of 100 m2, a velocity of 1000 m/hr and a dispersion coefficient of 10 m2/sec. Two hrs later a second discharge of the
II. PLUG FLOW MODEL This particular model results in the "Streeter-Phelps Equation" which describes the oxygen-sag curve in a river. Consider a simple geometrical analog of a river. Flow = Q BOD = LO DO = CO X A = cross sectional area longitudinal directi
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Problem set 4 due this Friday, March 5 Problem set 5 due next Friday, March 12
Has typos take new assignment
Quiz on Monday, March 8:
Redox reactions (no balancing) Energetics Substrate utilization kinetics COD, BOD, NOD etc.
Course Eval
Recap: so far we've covered the sinks for D.O., i.e., BOD, NOD and the rate at which these reactions happen. These are elements of our phenomenological model which will (hopefully) describe what happens when a wastewater is discharged to a stream.
We have
CEE 3510 Prob. Set No. 3 Due: Feb. 24, 2010 1. Data for a toxicity test on effluent from an industrial source are given in the table below. The organism used for this test was Ceriodaphnia duba. From this data estimate the 48 hr and 96 hr TLm. Concentrati
STELLA Assignment #2 - BOD 1) In this problem you will be tracking the biochemical oxygen demand (BOD) impact of a waste discharged from the Watapiti waste facility. The plant discharges 5 x 105 liters/day of waste (Qp). The raw waste coming into the faci
CEE 3510 Prob. Set No. 4 Due: March 3, 2010
1. Using free energy principles explain why anaerobic digestion (with the production of CH4) is used to treat organic sludges produced during biological wastewater treatment. 2. Human wastewater production is ab
CEE 3510 Problem Set No.5 Due: March 12, 2010 1. [Adapted from Water Quality by Tchobanoglous and Schroeder]
5 mL of a polluted water sample plus 1.0 mL of a bacterial seed are diluted to 300 mL for a BOD test according to the procedure described in Stand
Timothy Lin CEE 3510 Homework 2 Stella 1 due: 2/17
1)
With your original amount of 1000 Curies of 226Ra and a decay rate of 0.0004279/year, how much source will remain in 1000 years, 2000 years, and 10,000 years? Note, you will need to change the simulati
CEE 351 ENVIRONMENTAL QUALITY ENGINEERING Cornell University School of Civil and Environmental Engineering Spring 2010
Class notes created by Professor Len Lion
CEE 351 ENVIRONMENTAL QUALITY ENGINEERING
Instructor: Deborah Sills Office: Room 413 Hollister
CEE 351 - ENVIRONMENTAL QUALITY ENGINEERING
Water Quality Parameters
I. Categories of Water Quality Parameters A. Physical B. Chemical C. Biological Units of Expression A. Mass relationships 1. 2.
II.
[See note section on General Chemistry]
Every field ha
Announcement
Lecture notes will be posted on Blackboard after class.
Examples on the International Level Ex. Build up of T.D.S. in U.S. rivers because of irrigation return flow.
Here's what happens: First apply water to field to grow crops:
Flow =Qi, TDS