Learn the basics of biogas use and its current role in Wisconsin. Next, manufacturers will talk about biogas systems and requirements. Lastly, fleets will talk about their firsthand experience using biogas as a transportation fuel.

1. Biogas to Vehicle CNG
Wisconsin Clean Cities
November 5, 2013

2. Biogas/Vehicle Fuel Benefits
• “Home grown” Fuels
– Lock in your future fuel cost long term
• Green Fuel- RNG has the smallest carbon
footprint of any commercial vehicle fuel
• Complies with CNG fuel specs and engine
warranties
2

5. BioCNG Is….
A Patent pending system to convert
biogas from an anaerobic digester or a
landfill to a gaseous vehicle fuel.

6. CNG Terms and Definitions
 CNG - Compressed Natural Gas
 LNG - Liquid Natural Gas
 RNG - Renewable Natural Gas (BioCNG™)
 GGE - Gasoline Gallon Equivalent, 116,000 BTU/Gal
 DGE - Diesel Gallon Equivalent, 130,000 BTU/Gal
 Biogas - Methane (CH4) and carbon dioxide (CO2) produced from the
breakdown of waste by bacteria in wastewater treatment facilities and
landfills
 RIN - A Renewable Identification Number is a serial number assigned to a
batch of biofuel for the purpose of tracking its production, use, and trading

7. Things to Consider

CNG vehicles on site or in future budget?




How many vehicles?
What type of vehicles?
How often do they need to fill up?
Time or fast fill?
 Is suitable biogas available?
 Is natural gas available on site?
 Existing infrastructure
 CNG infrastructure
 Biogas Conditioning System

8. Biogas Quality

9. BioCNG™ System Process Flow Diagram
Biogas
Source
(Digester,
Landfill
BioCNG™ Gas
Conditioning
System
Glycol Chiller
Hydrogen
Sulfide
Removal
Gas
Compression/
Moisture Removal
CNG Vehicle
Fueling System
Control
Panel
Siloxane/
VOC
Removal
Carbon
Dioxide
Removal
CNG Vehicles

10. 10

11. BioCNG Models

12. CNG Fueling
12

13. Identifying the Fuel Needs
Vehicle Fueling Capability
Model
Ford F150
Waste Hauler
School Bus
BioCNG™ 50
16
5
4
BioCNG™ 100
32
10
8
BioCNG™ 200
64
20
16
* Assumes 1 fill per day per vehicle

14. Dane County, WI
Project Information
• Dane County, WI Rodefeld Landfill
• Developed with private, municipal, and educational
entities
• System installation – December 2010
• Upgraded to 50 SCFM/ 250 gge/day in 2012
• 19 county light duty vehicles – more planned
• 6.4 MW LFGTE plant operational on site – excess gas
• 2011-US EPA’s LMOP Project of the Year Award
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15. Dane County, WI Rodefeld Landfill
15

16. Dane County, WI Rodefeld Landfill
16

17. Dane County, WI Rodefeld Landfill
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18. Janesville, WI WWTP
City of Janesville, WI WWTP
Overview
 Founded in 1835
 Located on the Rock River, in southeast Wisconsin
 Area: 33 sq miles
 Population: 63,500
 Design Capacity of 19.8 million gallons of sewage per
day (MGD)
 Thermophilic-mesophilic anaerobic digestion
 Produces 100,000 to 130,000 ft3 per day of digester gas
 Generates 1,600 dry tons of biosolids per year

19. Janesville, WI WWTP
City of Janesville, WI WWTP
Timeline
PHASE 1
(4) CR65-ICHP
Capstone
MicroTurbines
PHASE 2
Gas Storage
Sphere
November 2010
140scfm Gas
Conditioning System
BioCNG Add-On
January 2012
July 2011
(1) CR200 Capstone
MicroTurbine
Summer 2012
March 2012
Vehicle Fueling
Station

20. Janesville, WI WWTP
City of Janesville, WI WWTP
BioCNG Storage and Filling Station
 100 gallons
gasoline
equivalent
storage sphere.
Gas treatment and microturbines inside
Digester with gas storage
Chiller
Compressor
Fuel dispenser
High Pressure
Gas Storage
 Fill-up time
comparable to
conventional
fuel station.

21. Sacramento South Area Transfer
Station
Organic Waste Recycling Center and Renewable
21
Natural Gas Fueling Station

22. Sacramento, CA

23. Sacramento-Atlas Disposal Fleet

24. Sacramento, CA
Project Information
•
•
•
•
•
•
•
•
Food Waste Digester- Clean World Partners
Start Up Date-May 2013
25-100 TPD
BioCNG 100 & BioCNG 200
100-300 scfm
500-450 GGE/day
Clean Energy Fueling Station
Fueling Sacramento/Atlas Disposal trucks
and other third party fleets
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25. Summary
•
•
•
•
•
•
•
Proven technology
Lowest cost fuel
Long term fixed fuel cost
Meets CNG fuel specs
Complies with engine manufacturers warrantees
Lowest carbon footprint (greenest fuel)
Scales down for small biogas generators
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26. Thank You
www.biocng.us
Jay Kemp, BioCNG
Jay.kemp@biocng.us
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27. Efficiency of BioCNG to Convert
Methane into Vehicle Fuel
Figure 1 - BioCNG Methane Efficiency
Raw Biogas Methane Concentration
70
65
60
55
Typical LFG
Typical Digester Gas
50
60
65
70
75
Percent Methane Conversion to Vehicle Fuel
80
85
90

28. Environmentally Superior Fuel
“RENEWABLE NATURAL GAS (RNG): The Solution to a Major Transportation Challenge,”
Energy Vision, New York, September 2012
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29. Biogas/Vehicle Fuel System
Economics
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30. Biogas Inlet and Outlet
Raw LFG
Product BioCNG Fuel
CH4
88 to 96%
CH4
50 to 60%
CO2
40 to 50%
CO2
0.2 to 1.0 %
O2
0 to 1.5%
O2
0.0 to 1.0%
N2
0.5 to 5%
N2
0 to 10 %
H2S
Up to 1,500 ppmv
H2S
Non Detect
Siloxane
Up to 1,500 ppmv
Trace Others
Water
<1%
0.40%
Siloxane
Non Detect
H2O
Per CNG
Requirements
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31. The CNG Revolution
• Gasoline and diesel costs continue to rise
• Natural gas is abundant and has a lower unit energy
cost than petroleum fuels.
• Fleets are converting to CNG for cost savings
• Natural Gas / CNG will play a role in our nation’s
energy security and independence
• CNG has environmental benefits over Gasoline and
Diesel
31

32. What is CNG?
• Natural gas compressed to 3,000-5,000 psi
• CNG is used worldwide as a vehicle fuel
– 15,000,000 vehicles worldwide
– Approx. 200,000 vehicles in US growing rapidly
– Powers small and large vehicles (scooters to
semis)
• Renewable Natural Gas (RNG) fuel is from
renewable biogas sources
– Landfills, WWTP digesters, Organic waste /food
waste digesters, dairy/ agricultural digesters
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33. Today’s Presentation
• CNG overview
• Biogas/vehicle fuel opportunities
• BioCNG in Wisconsin
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34. Efficiency of BioCNG to Convert
Methane into Vehicle Fuel
• Methane efficiency of the BioCNG system
varies depending on the concentration of
methane the raw biogas.
• Methane not converted to vehicle fuel is
routed with the carbon dioxide waste gas to
be destroyed in a boiler, flare or micro turbine.
• If the waste gas is routed to a boiler, micro
turbine, or other recovery system the
methane efficiency may approach 100%.