RBC Sewage Treatment Plant

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)


• Fixed Film Process (RBC’s, Trickling Filters, etc)

• Micro-organisms which break-down wastewater attached to media as part of a slime colony


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


SecondaryClarifier

PrimaryEffluent Secondary

Effluent

Waste Activated Sludge (WAS)

RBC Reactor

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

RBC Sewage Treatment Plant

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