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The Waste in our Wastewater
Denver J StutlerCEO, U.S. Submergent Technologies
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About the Presenter
+ Denver J. Stutler, Jr. is a civil engineer and has his
professional engineer license in the State of Florida
+ 10 years at CDM Smith, an international engineering firm
specializing in water
+ Chief of Staff, State of Florida Department of Environmental
Protection (DEP) Chief of Staff, Executive Office of Florida
Governor Jeb Bush
+ Secretary, Florida Department of Transportation
+ Spent last eight years in private sector, bringing proprietary
products into marketplace
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What is the Waste?
Sebring, FL
What you see
What you dont see
175 cubic yards of sand
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Hyperion Wastewater Treatment Plant Los Angeles, CA
What you see
What you dont see
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South Hillsborough County WTTP Ruskin, FL
What you see
What you dont see
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San Antonio Water System (SAWS) Pipeline
Rag Material
What you dont see
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Barge Port Arthur
What you see
What you dont see
Heavy crude oil High viscosity material
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+ Wastewater travels through collection systems (underground
pipes) to the wastewater treatment plant
+ Water is collected and treated through this process:
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Wastewater Treatment Process
Collection Aeration Digestion Clarifier River/ Stream/Bay
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+ Wastewater treatment is a biological process that requires
oxygen
+ Aeration basins are designed for a certain amount of capacity
to allow oxygen into the process+ Designed based on time required
for water to be
treated+ Assumes capacity will always be there
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Wastewater Treatment Process
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+ United States has between 700,000 and 800,000 miles of
underground pipe, divided in 8 ft. sections, ranging from 6 to 240
in diameter
+ This aging infrastructure allows for sand/grit to move through
the collection system due to cracks and joints in the pipes
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Inflow / Infiltration
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+ Sand and grit travels through the collection systems,
ultimately ending up at the wastewater treatment plant
+ Accumulation of sand and grit in the aeration basins decreases
capacity+ Amount of oxygen reduced = reduced detention
time of water+ Increased use of energy
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Capacity / Efficiency Issues
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Opaque water makes it difficult to determine if sand and grit is
accumulated in the aeration basins (or how much)
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How to Tell If There is a Sand/Grit Problem
What you dont seeWhat you see
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+ Inflow increases dramatically during the wet season
+ Higher energy costs+ Blowers and diffusers in tanks work
harder to lift
sand and grit and keep suspended
+ BOD, TSS, Nitrate levels
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How to Tell If There is a Sand/Grit Problem
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Example: Utility in Florida
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Example: Utility in FloridaCost Analysis of Energy Savings
Energy Consumed at Plant only (ACTUAL)
11/21/2014 $6,479.14
10/27/2014 $7,177.78
9/26/2014 $7,817.63
8/26/2014 $8,613.94
Monthly average based on actual: $7,522.12
12-month estimated total based on actual: $90,265.47
Aeration Energy Consumption at 60%: $54,159.28
Average Annual Per Hour Cost of Operation (divide by 24):
$2,256.64
Reduction of Hours of Operation
4 6 8 10 12
Annual Savings ($) $9,026.55 $13,539.82 $18,053.09 $22,566.37
$27,079.64
Sheet1
Energy Consumed at Plant only (ACTUAL)
11/21/14$6,479.14
10/27/14$7,177.78
9/26/14$7,817.63
8/26/14$8,613.94
Sheet2
Reduction of Hours of Operation4681012
Annual Savings
($)$9,026.55$13,539.82$18,053.09$22,566.37$27,079.64
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Example: Utility in FloridaCapital Improvement Cost Savings
Capacity Restored
Low End @ $600/cy High End @ $1200/cy
750 cy $450,000 $900,000
Annual Debt to Build Replacement Volume
$34,615 $69,231
Replacement Costs
Estimated volume to be removed: 750 total cubic yards
Sheet1
Energy Consumed at Plant only (ACTUAL)
11/21/14$6,479.14
10/27/14$7,177.78
9/26/14$7,817.63
8/26/14$8,613.94
Sheet2
Reduction of Hours of Operation4681012
Annual Savings
($)$9,026.55$13,539.82$18,053.09$22,566.37$27,079.64
Sheet3
Replacement Costs
Capacity RestoredLow End @ $600/cyHigh End @ $1200/cy
750 cy$450,000$900,000
Annual Debt to Build Replacement Volume$34,615$69,231
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235 N Orange Ave, Suite 201Sarasota, FL 34236
(844) 765-7866www.ussubmergent.com
The Waste in our WastewaterDenver J StutlerCEO, U.S. Submergent
TechnologiesSlide Number 2Slide Number 3Slide Number 4Slide Number
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