23 - Massachusetts Institute of Technology
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23
Transcript of 23 - Massachusetts Institute of Technology
23
CiVi + CiUb
CiVi
CiUb
Ub
CLUb
SFL
= C
L V L
+ C
L U b
Ci CL Cu
Underflow flux
Limiting flux
Gravity flux CLVL
Solid
s Flu
x, k
g/m
2 . h SFL
Solids Concentration, mg/L
Total flux
Figure by MIT OCW.
Adapted from: G. Tchobanoglous, F. L. Burton, and H. D. Stensel. Wastewater Engineering: Treatmentand Reuse. 4th ed. Metcalf & Eddy Inc., New York, NY: McGraw-Hill, 2003, p. 823.
Scraper
Supernatant
Supernatant trough
Rotation
Feed Sludge
AA PLAN
Figure by MIT OCW.
Supe
rnat
ant
Inlet Well
Weir
Feed Sludge
Thickened Sludge
Pickets
GRAVITY-TYPE SLUDGE THICKENER
B Elevation
Figure by MIT OCW.
Adapted from: Reynolds, T. D., and P. A. Richards. Unit Operations and Processes in EnvironmentalEngineering. 2nd ed. Boston, MA: PWS Publishing Company,1996, p. 631.
Pressure Reducer Air Pressurizing Pump
Influent
Recycle Flow
Schematic Diagram of a Dissolved-Air Flotation System
Float Collector
Flotation Tank
Baf
fle
Effluent
Sludge Discharge
Air-Dissoltion Tank
Figure by MIT OCW.
Adpated from: Viessman, W., Jr., and M. J. Hammer. Water Supply and Pollution Control. 7th ed.Upper Saddle River, NJ: Pearson Education, Inc., 2005, p. 678.
Gear Box
Port (adjustable)
Cover
Feed Solids
Rotating BowlRotating Conveyor/Scroll
Thickened Solids
Thickened Solids
Main Drive Sheave
Centrate
Feed Ports
Schematic Diagram of a Centrifuge Used for Sludge Thickening
Differential Speed
Centrate Discharge
Discharge Port
Figure by MIT OCW. Adapted from: G. Tchobanoglous, F. L. Burton, and H. D. Stensel. Wastewater Engineering: Treatment and Reuse.4th ed. Metcalf & Eddy Inc., New York, NY: McGraw-Hill, 2003, p. 1469.
Gravabelt
Komline-Sanderson12 Holland Av� Peapack, NJ 07977-0257 908-234-1000� Fax: 908-234-9487 800-225-5457� [email protected] � www.komline.com
Figure by MIT OCW.
Adapted from: WEF. "Wastewater Treatment Plant Design. Water Environment Federation."Alexandria, Virginia, 2003.
Belt washwater
Belt filtrate & washwater
Thickened solids pump
Thickened solids hopper
PlowsFlocculation well
Polymer
Solids
Variable orifice inline mixer
Adjustable ramp
Filtrate
Belt
Polymer injection ring
GRAVITY BELT THICKENER SCHEMATIC
