Transcript Slide 1

Program Overview
Landfill Gas to Energy
Clark Wiedetz
General Manager
Alternative Energy
678-427-0150
Division: Energy & Environmental Solutions
Date: December 12, 2007
Page 1
Executive Summary
•
The landfill gas (lfg) project marketplace is expanding at recordlevel proportions.
•
The Landfill Gas Methane Outreach Program (LMOP) estimates
that 50 projects will become operational in the next 24 months.
•
The price of fuel has increased 300% in the last 4 years, thus
exceeding the cost to convert lfg into a usable form of utility
•
Increased environmental regulations for landfills are being
mandated
•
Lfg has been designated as a renewable energy source by the
Federal Government and in 24 States with Renewable Portfolio
Standards, thus making lfg projects eligible for a number of
incentives and tax credits.
Page 2
For internal use only / Copyright © Siemens AG 2006. All rights reserved.
Landfill Gas
Landfill Gas
 Is about 50% CH4 (Methane)
 Is about 50% CO2
 Contains other trace gases & elements
 Is naturally created by the decomposition of garbage
 Has a very high greenhouse effect
 Has a heating content of about 1/4 that of natural gas
Methane creates roughly 20 times
the greenhouse effect of CO2
Page 4
… unless you burn it!
How can we use these fuels?
Direct Use Project
 Gas is piped to a boiler, where it is combusted to make heat or steam.
Electric Generation Project
 Gas is piped to a nearby electric generator, where it is combusted to
make electricity.
Pipeline Injection Project
 CO content is minimized. Gas is compressed, then injected into a natural
gas pipeline.
Page 5
Direct Use
Landfill Gas - to - Direct Use Process
G
A
S
F
I
E
L
D
EXISTING LFG FLARE
Point of
Fuel Gas Delivery
EXTG KNOCKOUT TANK
EXISTING
LFG
BLOWER
LFG
BLOWER
LFG
DRYING/TREATMENT
STATION
Leachate
Raw Landfill
Gas IN
Conditioned
Gas OUT
EXISTING LEACHATE
TRANSFER PIPELINE
TO HOLDING POND
Transport Piping
Point of Delivery
EXISTING BOILER
NEW Med-Btu
w/ EXISTING BURNER and
NEW Medium-Btu BURNER Fossil Fuel Burner
(to supplant fossil fuel)
NG Fuel IN
Integrated
Combustion Controls
(HDPE underground)
(S/S above ground)
Quantity & Quality
Metering
Fuel Oil IN
For internal use only / Copyright ©
Siemens AG 2006. All rights reserved.
Three Rivers SWA/ Kimberly-Clark
“Landfill gas to be used for diapers” from Waste News
 Installed collection system and flare
 Conditioned, if necessary, to remove challenging trace gases
 Compression system
 17 miles of pipe
 Boiler retrofit to accept and combust landfill gas
 $10MM project
 Carbon credits help project economics
Page 7
Customer Deal Structure Example (Three Rivers SWA)
Page 8
Electric Generation Project
Page 9
Electric Generation
For an Electric Generation Project, the gas is also
 Collected, compressed and conditioned, if necessary.
 Used as fuel for reciprocating engines, fuel cells, microturbines
 Larger projects can send renewable power to utilities (thus fulfilling
RPS requirements)
 Renewable energy credits (RECs) and possibly Production Tax Credits
(PTCs) help project economics
Page 10
Landfill Gas Project Developers
Siemens
DTE Biomass
Fortistar
Ameresco
Energy Services Group
Waste Management
Page 11
Questions?
Page 12