Water Energy Nexus The life of a drop of water MSD System Overview - - PowerPoint PPT Presentation

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Apr 12, 2023 123 likes •237 views

Water Energy Nexus The life of a drop of water MSD System Overview & Details Two utilities: wastewater and stormwater 4,700+ miles of separate sanitary sewers 1,800+ miles of combined sewers 525 square mile service area

SLIDE 1

Water Energy Nexus

The life of a drop of water

SLIDE 2

MSD System Overview & Details

Two utilities: wastewater and stormwater
525 square mile service area
1,300,000 customers
90 municipalities served
7 treatment plants
356 million gallons/day wastewater treated

4,700+ miles of separate sanitary sewers
1,800+ miles of combined sewers
3,000+ miles of stormwater sewers
4th largest sewer system in US (by miles of

sewers that handle wastewater)

SLIDE 3

9,531 Total Miles of Sewers 9,402 Miles Rely on Gravity 3,025 Miles of Storm Sewers 4th Largest Collection System in the Country*

* When measuring sewers that handle wastewater

SLIDE 4

277 Pump Stations 207 Sanitary $2,828,000 electrical use 22% of total electrical use $115,000 gas use 6% of total gas use

Pump Stations

SLIDE 5

SLIDE 6

350 MGD Bissell Point 40 MGD Coldwater 6.75 MGD Fenton 21 MGD Grand Glaize 340 MGD Lemay 15 MGD Lower Meramec 38 MGD Missouri River $9,834,000 electrical use 78% of total electrical use $1,985,000 gas use 94% of total gas use

Treatment Plants

SLIDE 7

Primary Gravity Low Energy SecondaryGrav ity Low Energy Aeration Suspended Biology High Energy

Trickling Filter Attached Biology Moderate Energy Solids Processing Solids Processing

Screens Physical Barrier Low Energy

Grit Gravity Low Energy Disposal Disposal Dechlorination Chlorination Ultraviolet Disinfection River

SLIDE 8

Primary Gravity Low Energy

Solids Processing Solids Processing

Multiple Hearth Incinerator High Energy Belt Filter Press Low Energy AnaerobicDig esterModerat e Energy Centrifuge Moderate Energy Engine & Generator Heat Heat Pre-air

Bldg. Heat & Cooling

Sanitary Landfill Sanitary Landfill Land Application Composting Ash Disposal Landfill Sludge Dewatering Secondary Gravity Low Energy Sludge Thickening Low Energy

SLIDE 9

Labor, 52,509,747, 51% Supplies, 16,279,874, 16% Utilities (Electric 12.4%, Gas 2.0%), $15,600,556, 15% Contractual Services, 14,383,039, 14% Capital, 3,732,489, 4%

14-15 Total Operations Costs $102,505,700

SLIDE 10

0.917 0.044 0.014 0.012 0.003 0.011 0.002

O & M Costs Penny Per Gallon

Total Cost 0.086

Penny 0.917 (not spent) Labor 0.044 Supplies 0.014 Contractual Services 0.012 Capital 0.003 Electric 0.011 Gas 0.002