Flow Through Turbidity Treatment

Using Alum & Pam At The

Orlando International Airport Project

Rim-ditch Dewatering Next To Active Runway

Rim-ditch Discharges To Existing Stormwater

Detention Pond

Influent Turbidity Ranged Between 800-1200 NTUs

Existing Stormwater Pipe Used To Create Baffle Flow

Alum Drip Tank With Control Valve

Alum Drip On Influent At 50

Gal/DayPAM Floc Log Used To

Bind Up Free Aluminum

Sand Bags Used To Create Baffle Flow In Pipes

Alum Floc Forming After 1st Baffle Turn

Turbidity Decreased To 11 NTUs After 1st Baffle Turn

Outfall To Wetland

Outfall To Wetland Clear Discharge

Final Discharge 10-15 NTUs

pH 6.5

Resource Protected

Any Questions?

Treatment System Performance:Treatment System Performance:

System Usage: 90 Days

Daily Volume: 1,920,000 Gallons

Total Pumping Volume: 173 Million Gallons

Alum Usage: 50 Gal / Day (4500 Total)

Treatment System Size: 600 x 16 Ft. (Existing pipe)

Turbidity Reduction (NTU): >900 (Inflow) 15 (Outflow)

% Turbidity Reduction: 98 %

Contractor’s System Cost: < $1,000 To Protect (>$23 Million Project)

Time Lost Due To Non-Compliance: NONE!

Contractor: Hubbard Construction

Contact: Jeff Forsythe (407)560-0442