Organic Waste Fuels Vehicle Fleet in Sacramento

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Organic Waste Fuels Vehicle Fleet in Sacramento

Omni ResortJune 24. 2014

• Convert Food Waste to energy (fuel) and fertilizer.

• Divert organics from landfill

• Produce Low Carbon CNG Vehicle Fuel

Project Overview

Project Background

South Area Transfer Station Sacramento, CA

Unused siteSacramento County RFPClean World and Atlas Disposal were awarded the project BioCNG selected for biogas to vehicle fuel upgrading

Public-private partnership• Clean World owns and operates the digester• Atlas Disposal owns the CNG fueling station

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SATS Site

Before After

Feedstocks

Source-separated organicsOff-spec. packaged food25 Tons per day- recently expanded to 100 TPD capacity

Pre-processing Technology

DODA System

• Removes Contaminants

• Grinds and slurries wastes

• De-packages off-spec food.

Anaerobic Digestion Process

Anaerobic Phased Solids

• Separate hydrolysis and methane formation

• 3 tank system

• Thermophilic temperature

• High Solids ( 25%) Capability

Biogas to Vehicle Fuel

Biogas/Vehicle Fuel Benefits

• Significant savings over gasoline and diesel

• Lock in future fuel cost long term

•“Greenest” fuel resulting in a significant carbon footprint reduction

• Complies with CNG fuel specs and engine warranties

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Biogas Treatment Requirements/Considerations

Hydrogen Sulfide Removal

Gas Compression

Moisture Removal

Siloxane/VOC Removal

Carbon Dioxide Removal

Fuel Requirements:• Engine Manufacturers Specifications, SAE J1616

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Skid-mounted BioCNG 100Currently handling 50-75 scfm Produces the equivalent of 330 to 400 gallons of diesel fuel per day* Phase 2 increases production up to 1,400 DGE

*All biogas produced by the Clean World digester is currently being processedfor vehicle fuel.

Package Engine Generator

• Operates in parallel with vehicle fuel production

• Includes gas conditioning

• A portion of waste gas from fuel production will go to the generator.

CNG Fueling Station

250 psig “buffer” storage

4,500 psig CNG storage

Fast-fill dispensers

Diesel CNG RNG-Landfill RNG- Dry AD RNG- Wet AD RNG-WWTP*-80

-60

-40

-20

0

20

40

60

80

100

120

95

75

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-15

-48

-65

Carbon Intensity for Fuels and Renewable SubstitutegCO2e/MJ

Fuel Type and Pathway

Carb

on In

tens

ity

5,000 10,000 15,000 20,000 25,000 30,000 35,000 40,000 45,000 50,0000

50

100

150

200

250

300

Diesel

BioCNG

Miles Driven (x1000)

CO

2e E

mis

sion

s (to

ns)

Garbage Truck

Municipal Sweeper

Transit Buses

Regional Freight Truck

Bio-CNG v. Diesel Emission Reductions 10 garbage trucks converted from diesel to Bio-CNG – reduce 1,000+ tons CO2e annually

Federal Renewable Fuel Standard Credits• Renewable Identification Numbers (RINs)

• Means to track, register and monetize environmental attributes of alternative vehicle fuels

• Available through 2022

• Direct payment from producers– not a tax credit

• The Advanced Biofuel (D-5) RIN is currently trading

at $0.52= $0.87/ DGE

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California Low Carbon Fuel Standard

• CARB digester pathway= -15g/MJ carbon intensity• Compared to diesel net carbon credit 110g/MJ

• $40/ton CO2=$ 4.64/decatherm (MMBtu)

• $0.60/ DGE

A Success Story

A Productive Partnership

Clean World

Atlas Disposal

BioCNG

Advanced Technology

A Growing Business

Multiple Environmental Benefits

Thank YouJay Kemp, PE, BCEE

Engineering ManagerJay.kemp@biocng.us

Katie Oliver-Applications EngineerKatie.Oliver@cleanworld.com

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