This document discusses renewable compressed natural gas (CNG) as a vehicle fuel from biogas. It provides an overview of BioCNG, a company that develops biogas upgrading systems to produce CNG. The presentation then covers the benefits of biogas energy conversion to CNG, including lower fuel costs and greenhouse gas reductions compared to gasoline and diesel. Examples are given of BioCNG systems installed at wastewater treatment plants and landfills that produce CNG to fuel local vehicle fleets in a cost-effective and sustainable manner.

1. Renewable CNG Vehicle Fuel
Wisconsin Clean Cities NG Roundtable
October 23, 2014

2. Presentation Overview
BioCNG Company Overview
Potential of Biogas Energy
City of Janesville
BioCNG Benefits
Q & A

3. BioCNG Overview
BioCNG, LLC
Sales and Marketing for BioCNG
Formed in 2010-First system was piloted at the Dane County Landfill in Madison WI
Headquarters in Madison, WI
Unison Solutions, LLC - Exclusive manufacturer of the BioCNG system
Cornerstone Environmental Group-Engineering Services
Design
Project Management
Permitting

4. Energy Values to Consider
Gasoline= 33.4 kWh/gallon energy content
$0.12/kWh @ $4.00/gallon
CNG
$0.07/kWh@ $2.50/gasoline gallon equivalent (GGE)

5. Energy Conversion
30 to 40% of biogas energy can be converted to electricity
70 to 90+% of biogas methane can be recovered as CNG vehicle fuel

6. O & M Cost Example
Biogas upgrading= $0.36/GGE
CNG Fueling Station= $0.20/GGE
$0.56/GGE
$0.017/kWh
Compare to co-generation.

7. Characteristics of Biogas Projects
Small scale producers of biogas
High quality, low contaminant gas
May have a captive vehicle fleet

8. Trucks & Buses Shifting To CNG: Cleaner, Quieter & Cheaper Fuel Fleets, Communities & Drivers Love Them

9. Gas Upgrading Technology
BioCNG 100 Gas Cleanup Skid

10. Putting it All Together

11. Project Sites

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

13. Persigo WWTP, Grand Junction CO
Pipeline

14. South San Francisco Blueline

15. South Transfer Station Sacramento, CA
Clean World now has a BioCNG 100 and a BioCNG 200 commissioning this year.

16. Biogas/Vehicle Fuel System Information
System Size
Biogas Inlet Flow (scfm)
Fuel Production (GGE/day)
Fleet Size Per Unit
Light duty
Heavy duty
BioCNG 50
50
200-300
20-27
2-4
BioCNG 100
100
375-600
38-55
5-8
BioCNG 200
200
775-1200
77-110
11-17

17. 95
75
13
-15
-48
-65
-80
-60
-40
-20
0
20
40
60
80
100
120
Diesel
CNG
RNG-Landfill
RNG- Dry AD
RNG- Wet AD
RNG-WWTP*
Carbon Intensity
Fuel Type and Pathway
Carbon Intensity for Fuels and Renewable Substitute
gCO2e/MJ

18. Biogas-to-CNG Benefits
•Green Fueling Infrastructure
–Distributed cleaner, greener infrastructure
•Greenhouse gas reductions
–Negative Carbon Intensity Pathway
•Homegrown Fuel
–Fuel savings (and credits) accrue to local public and private entities
–Infrastructure primarily from local sources - GC, electric, construction, permitting, fueling station
•Significant cost savings
–50-75% savings over current gas/diesel cost
•Control and distributed source
–Fuel cost locked in for 15-20 years

19. Biogas-to-CNG Summary
Low cost fuel and fixed long term
Short-term pay back with w/RINS and credits
Compatible with all CNG infrastructure
Greenest fuel
Fits the scale of digester projects

20. Questions