RBC Sewage Treatment PlantRBC Sewage Treatment Plant
February 27, 2007
Treatment Plant DesignTreatment Plant Design
KEY SITING/DESIGN CONSIDERATIONS
• What is the availability and cost of land?
• How is the wastewater conveyed to the new site?
• How important is odour/noise control?
• Is storage required to provide for effluent reuse?
• How will the effluent be disposed? Level of treatment?• How are the sludge residuals (ie, the wasted micro-organisms, bugs) managed?
Rotating Biological Contactor (RBC)Rotating Biological Contactor (RBC)
Rotating Biological Contactor (RBC)Rotating Biological Contactor (RBC)
• Fixed Film Process (RBC’s, Trickling Filters, etc)
• Micro-organisms which break-down wastewater attached to media as part of a slime colony
Rotating Biological Contactor (RBC)Rotating Biological Contactor (RBC)
Biological Film(bacteria, protozoa,
rotifers, alagae, fungi, worms)
Was
tew
ate
r
Biological Film Sloughed as it
Grows
Plas
tic D
isk
Plas
tic D
isk
Rotating Biological Contactor (RBC)Rotating Biological Contactor (RBC)
SecondaryClarifier
PrimaryEffluent Secondary
Effluent
Waste Activated Sludge (WAS)
RBC Reactor
OkotoksOkotoks RBCRBC
OkotoksOkotoks RBCRBC
OkotoksOkotoks RBCRBC
Gallagher Canyon G&C RBCGallagher Canyon G&C RBC
RBC Design (A Case Study)RBC Design (A Case Study)
Design ObjectivesDesign Objectives
• Service Population = 1,500 people
• Wastewater Flow = 1,630 m3/d (Average Day)
• Biological Oxygen Demand (BOD) & = 15 mg/LTotal Suspended Solids (TSS) Objective
• Effluent Phosphorus Concentration = 1.0 mg/L
• Ammonia/Nitrogen = N/A
Achieved through Alum addition
Future contingency –achieved through
increased media area
Site DevelopmentSite Development
Features:
A. Primary Treatment
B. RBC’s
C. Clarifier
D. Disk Filter
E. UV Disinfection
F. Outfall
G. Digester
Total Area (Excluding Sludge Storage Lagoons = 0.2 Ha (0.5 acres)
Secondary TreatmentSecondary Treatment
Main FloorMain Floor
Features:
A. 3 RBC’s
B. 2 Secondary Clarifiers
C. Cloth Disk Filters
D. UV Disinfection
E. Electrical Room
F. Office
G. Washroom
UV DisinfectionUV Disinfection
DiscussionDiscussion
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