EGGG 101 Session 4 Lab Overview Sedimentation Measurements and What Can Be Learned

1. EGGG 101Session 4Lab OverviewSedimentation Measurements and What Can Be Learned

2. Example: Indian River Bridge • What’s the problem?

3. Treatment Options • Sedimentation/Filtration • www.stormwaterinc.com Sedimentation chamber Inlet Manhole Outlet Filter cartridges

4. Sedimentation • Sedimentation basins are large tanks where the water flows slowly so that particulates settle out – this will be our exercise next Wednesday! In water and wastewater treatment plants, these are so large they are placed outside. www.coffeyville.com/Water.htm

5. Sedimentation From Prof. Cushman-Roisin , Dartmouth College

6. Sedimentation From Prof. Cushman-Roisin , Dartmouth College

7. Sedimentation Competition • Design the “best” sedimentation tank • Pick up materials (today) • From 166 DuPont Hall: Styrofoam, ruler, duct tape • Construct basin (today or tomorrow) • On own • Or, Tuesday between 10am-12noon; 3pm-5pm in 021 Spencer Lab • Cutting knives available. • “Test design” (next class) • Class meets on Wednesday in Oceans Laboratory

8. Box shapes: Internal baffles or dividers: Outlet opening(s): Sedimentation Competition • Basin construction • Each group gets: 2’ x 1.5’ x 0.5” Styrofoam and duct tape • Design and construct basin • Important components: box, baffles, and outlet opening(s)

9. Sedimentation Competition • Hints … • Read lab handout for ideas • Stormwater flow rate ~ 1 liter/min • Outlet control affects water level in basin • Internal baffles slow water down and control water levels

10. Laboratory Write-up • Recall settling zone in sedimentation basin

11. Laboratory Write-up H • All particles with vertical velocity greater than a critical velocity (vc) should be captured. • Consider settling zone in basin with water velocity u = 0 H = water depth vc= 0 Thus,all particles settle out, no matter how slowly they descend

12. Laboratory Write-up u u u v1 v2 v3 H • Consider situation with water velocity, u > 0, and three particles settling: large, medium, and small v3 < vc small particle v1 > vc v2 = vc large particle medium particle Only particles with v >= vc settle out

13. Laboratory Write-up • 1 Group lab report – divided into individual responsibilities • Analysis/discussion • Measure flow rate, Q • Measure volume of quiescent zone • Compute residence time in quiescent zone • Compute critical velocity for reactor, vc

14. Laboratory Write-up • All particles with vertical velocity greater than vc should be captured – so how can you “optimize” your basin design? • How do you quantify performance: compute treatment efficiency, h

15. r = particle radius = 3.50 g/cm3 for brake dust particles = 1.0 g/cm3 for water (water at ~ 25oC) = 0.00890 dynes – sec/cm2 (water at 25oC) Laboratory Write-up • Estimate particle size of brake dust that YOUR basin will remove completely • All particles with v >= vc will be removed! • Estimate mean particle size removed using basin – Stoke’s Law

16. Laboratory Write-up • Compare with particle size distribution of actual brake dust

17. Laboratory Write-up • Estimate copper removed with particles, if copper sorbed to particles • Type all sections that are text. Calculations do NOT have to be typed.

18. Next Class – Oceans Lab Oceans Lab

19. EGGG 101Environmental Engineering Cool StuffWhat cool stuff have environmental engineers done?

20. Engineers Without Borders • UD student group: http://copland.udel.edu/stu-org/ewb/ • Current project: water supply for a town in Cameroon - safe and accessible • Students from several engineering fields involved (civil, env., mechanical) but problems have an environmental focus

21. EGGG 101Environmental Engineering at UDWhat courses will you take? What will it “feel” like in this program?

22. Photo of Recent Graduates • What do you see? • Small size – about 10 – 15 per class • Student:faculty ratio of 6:1 • 60% of students work one-on-one with faculty • 50-60% women

23. 4 Concentrations in Env. Eng. • Contaminant Transport and Control Processes — engineered and natural processes controlling contaminant behavior and remediation techniques • Chemistry (CHEM 103/112/119/443), chemical engineering courses • Environmental Facilities Design and Construction — engineer the systems for air, water, and wastewater purification. • Chemistry (CHEM 103/104), civil eng. courses (structures + soils) • Minor in civil engineering common

24. 4 Concentrations in Env. Eng. • Environmental Engineering Biotechnology— biological and microbial aspects of ecology and pollution control. • Chemistry (CHEM 103/104/331/333/342), biology courses • Water Resources & Water Quality — mitigate the effects of droughts and floods, and cleanup contaminated rivers, streams, and groundwater • Chemistry (CHEM 103/104), water resources courses

25. Observations About Curriculum • Chemistry/Biology courses (2 concentrations in particular) • One less Math course than civil, mech., elect, and computer eng. • Includes some Chemical Engineering courses and concepts • Flexible major

26. Closing Thoughts on Environmental Engineering at UD • Emphasis on chemistry • Emphasis on modeling of natural systems – rivers, streams, groundwater • Emphasis on building engineered systems – water treatment plants, etc. • Emphasis on water resources • Fast growing, exciting, people-focused profession

27. Observations About Curriculum • Required or elective courses in • Recycling/Solid Waste Management • Ecology • Groundwater Flow and Pollutant Transport • Modeling Water Quality in Rivers • Air Pollution Control • Environmental Soil Microbiology • Structural Analysis/Structural Design