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Presentation to Philadelphia Energy Authority

January 9, 2014 Christopher S. Crockett, Ph.D., P.E. Paul Kohl, P.E.

Presentation to Philadelphia Energy Authority

January 9, 2014 Christopher S. Crockett, Ph.D., P.E. Paul Kohl, P.E.

Electrical Energy Consumption

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3.8% WATER TREATMENT 1.5% COLLECTION SYSTEM PUMPING STATIONS 48.6% WASTEWATER TREATMENT 46.1% DRINKING WATER PUMPING

• PWD uses 274 million kWh of electricity annually.
• Electricity accounted for 78% of energy costs ($19m)

and 67% of PWD’s energy use in FY 2013.

• Half of PWD’s electricity is used in water operations, the
• ther half in wastewater.
• In water operations, most electricity

is used for pumping.

• In wastewater operations, electrical

usage is more evenly split between treatment and pumping.

Utility‐Wide Strategic Energy Plan

• Based on the existing

Departmental culture that encourages energy efficiency and conservation.

• Formalizes processes for

information transfer and decision making.

• Codifies value of energy

efficiency and generation into strategic capital processes.

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Portfolio Management

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BUY it USE it MAKE it

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Solar Panel Installation

Southeast WPCP

• $1.6 million project cost

– $0.75 million from the PWD – $0.85 million provided through an Energy Efficiency and Conservation Block Grant from the Department of Energy

• Saves the PWD $30,000 ‐

$60,000 annually (varies with cost of electricity)

• Simple pay back of 11‐12

years with 25‐year life cycle

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Sewage Geothermal Installation

Southeast WPCP

• Project cost of $240,000
• $150,000 from

Greenworks Pilot Energy Technology Grant

• $90,000 from

NovaThermal Energy

• Put into operation in

February 2012

• Provides heat to

compressor building and gallery space at Southeast WPCP

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Aircraft Deicing Fluid Co‐digestion

Southwest WPCP

• Mutually beneficial

business decision

• Aircraft deicing fluid (ADF)

collected from the Philadelphia International Airport

• Generates useful methane

gas using anaerobic digestion

• No negative impact on

wastewater treatment process

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Biogas Cogeneration Facility

Northeast WPCP

• Facility will meet

85% of current Northeast WPCP electrical requirements.

• Facility will provide

15% of PWD’s total electrical use.

• Captured biogas will

meet all of process heating needs at plant.

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• Facility will produce 4 x 1.44 MW = 5.67 MW electricity
• Off‐set: 31,849 tons of CO2 / year
• This is equivalent to

– 6,019 passenger vehicles – 23,683 acres of U.S. forests – 124 railcars of coal – 3,239,126 gallons of gasoline

Biogas Cogeneration Facility

Environmental Metrics

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• Pulsed Air Flocculator

Aeration System, Southwest WPCP

• ~ $2 million project cost.
• NTP has been issued.
• Will allow three 400‐hp

blowers to be taken out of service.

• Estimated payback period
• f 2.3 years for the system

alone; 4 years when additional pipe replacement is included.

Upcoming Projects

• Heat Loop, Northeast WPCP
• ~ $3 million project cost.
• Designed, waiting on

capital funding.

• Will optimize use of

current investment.

• Will connect Biogas

cogeneration facility to Preliminary Treatment Building (PTB) across campus.

• Chillers will be upgraded to

run on hot water loop.

Concepts for Projects of the Future

• Out‐of‐Box thinking
• Exciting new horizons
• Resource Recovery Facilities
• Eco Complex

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Future Concepts

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Conceptual Biogas Use Scenarios

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Questions?

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