Transcript Document

PROTECTING PUBLIC HEALTH AND THE ENVIRONMENT FOR GENERATIONS TO COME.
EnerTech: Converting Biosolids into
Renewable Fuel
Air and Waste Management Association Fall Conference
Atlanta, Georgia
October 7, 2010
EnerTech Environmental, Inc. 2010. All rights reserved.
Contents
Company Overview
The SlurryCarb® Process
Rialto Facility
Energy Advantage
Carbon Benefits
Regulatory Overview
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Company Overview
• Formed in 1992
• Headquartered in Atlanta
• Proprietary and proven technology with three
demonstration facilities
• Licensed technology to Mitsubishi for Asian market
• Operating first commercial facility in Rialto, Southern
California
• Expanded to the UK market in August 2009
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The SlurryCarb® Process
AD = biogas
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Benefits of SlurryCarb®
Long-term Sustainable Solution for Biosolids Management
– Typical contracts for 20 to 30 years (DBOO)
Permanent Biosolids Recycling
– Eliminates the need for land application & land filling
Renewable energy production
– Increased biogas yields enhance potential for on-site energy generation
– Additional fiscal incentives (Carbon offsets)
– eFuel used to replace solid fossil fuels
Hedge Against Fuel Cost Risk
– Utilizes significantly less energy than heat drying
– Minimizes exposure to fuel cost volatility
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Benefits of SlurryCarb® (cont.)
Price Stability; Reduced Operating Costs
– Fixed long-term price
Reduced CO2 emissions
– CO2 emissions are lower than a similarly sized thermal drying facility
– eFuel produced by a facility the size of Rialto offsets 80,000 tons of GHGs
per year
– Biogas used as a fuel on-site produce biogenic CO2 emissions (instead of
anthropogenic)
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Benefits of SlurryCarb® (cont.) – Net energy generation
A SlurryCarb® eFuel facility is a net generator of energy. In other words, eFuel contains significantly
more energy than a facility consumes producing it, as the example energy profile demonstrates below.
400 WTPD(1)
Biosolids
82 tons (2)
eFuel
441 MMBtu(3)
Natural Gas
Energy Consumed
173 MMBtu
Digester Gas
(4)
60 MWH
Electrical Power
Net natural gas
441
power(1)
Electric
Total
Consumed
205
Energy
Energy Produced
eFuel(2)
(1) 400 WTPD at 24% solids = 96 dry tons (solids) + 304 tons H2O
(2) 82 WTPD at 95% solids = 78 dry tons (solids) + 4 tons H2O
(3) Only includes boiler (i.e. no burners associated with control equipment)
(4) Correcting for efficiency of the motors; typical efficiency is 90%. Uncorrected
electrical = 54 MWH
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(MMBtu)
646
(MMBtu)
1,350
(1)
1 kWh
= 3,413 Btu
Net
Energy
704
(2) Assumes 8,230 Btu/lb dry eFuel from undigested
sludge
EnerTech Environmental, Inc. 2010. All rights reserved.
eFuel: Permanent Biosolids Recycling
Heating value of 5,500-8,300 Btu/lb in dry
form
Can be utilized in multiple coal applications
–
Cement kiln
–
Gasifier
–
Coal-fired power station
–
Waste boiler – other boilers for power generation
Minimizes fossil fuel consumption
Certified as a renewable fuel in California
Benefits of replacing coal with eFuel:
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–
Costs less than coal
–
Reduces emissions of SO2
–
Reduces GHG emissions
–
Increases use of renewable energy
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Rialto SlurryCarb® Facility
Renewable Fuel from Biosolids
EnerTech Environmental has constructed a biosolids-to-renewable
fuel facility in Rialto, Southern California
– Construction began: April 2007
– First truckload of biosolids processed: October 2008
At full capacity, the facility will generate over 60,000 tons of renewable
fuel (eFuel) per year
Use of eFuel in lieu of coal will offset over 80,000 tons of greenhouse
gases
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The Rialto SlurryCarb™ Facility
The Rialto Facility
Biosolids from the
region
~170 TPD eFuel to
cement kiln
Current stakeholders include five municipalities:
LACSD
OCSD
City of Riverside
City of San Bernardino
City of Rialto
208 wtpd
225 wtpd
150 wtpd
75 wtpd
25 wtpd
683 wtpd
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Receiving Pit
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April 2009
Biosolids Storage
Silos
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SlurryCarb® Area
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Dryer Area and eFuel Silo
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How Much Renewable Energy?
The facility will generate over 60,000 tons of
renewable eFuel annually
That’s enough renewable eFuel to produce
792,000 mmBTU annually
The average home in the United States annually
consumes about 83 mmBTU of energy1
If used to produce electricity, the Rialto Facility
would generate enough energy to power around
9,500 homes per year
There are approximately 25,000 households in the
City of Rialto2
Equivalent eFuel consumption would provide
enough power for 38% of the city’s homes
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2
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US DEPARTMENT OF ENERGY
2000 CENSUS
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Rialto’s Energy Advantage: Savings by Design
Savings by Design (SbD) provides technical and financial
resources to help commercial and industrial customers save
energy and money when they design, expand, or change new
or existing processes and facilities
The five processes that were optimized at the Rialto facility
include the heat transfer fluid system, anaerobic digester, heat
exchanger, thermal oxidizer, and dryer
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Summary: Savings by Design
Due to participation in the program, the Rialto SlurryCarb®
Facility is expected to save in excess of 3 million therms
annually
EnerTech was presented with an incentive check for $1M
from SoCalGas for the energy savings it has received from
participating in the program
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Rialto Life Cycle Analysis of GHG Emissions
Producing and using eFuel as a coal substitute results in a net reduction of
101,600 tons per year CO2e vs. conventional drying and land application
SlurryCarb to
E-Fuel Coal
Substitute
Conventional
Drying to Land
Application
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Rialto Life Cycle Analysis of GHG Emissions
(cont.)
Key Assumptions
683 WTPD of 22.3% TS cake
eFuel = 6,006 Btu/lb, Pellets = 6,506 Btu/lb
WWTP to Rialto = 40 miles
Rialto to kiln = 65 miles
Rialto to AZ for land application = 275 miles
Compost to land application = 33 miles
WWTP to landfill = 25 miles
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Rialto Life Cycle Analysis of GHG Emissions
(cont.)
Compare SlurryCarb + eFuel to a Kiln to:
CO2e/yr
Drying + land application
101,600
Landfill wet cake
101,100
Incineration
69,200-91,500
Land apply wet cake
71,800
Composting
58,500
Drying + pellets to kiln
12,800
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Regulatory Overview–Rialto SlurryCarb® Facility
Existing Permits/Plans
– Minor Source of Air Emissions, SCAQMD
(< 4 tpy NOx, SOx, VOCs, PM10)
– General Permit, Storm Water and Storm Water Pollution Prevention
Plan (SWPPP)
– Industrial Wastewater Discharge Permit
– Small Quantity Generator, Hazardous Waste
– Spill Prevention Control & Countermeasures (SPCC) Plan
– Hazardous Management Business Plan (Tier II)
– Solid Waste Permit
– Biosolids Management Plan
– Land Application Permit
– GHG Monitoring Plan
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Recent and Emerging Regulations and how they
affect EnerTech
Federal GHG Reporting Rule
– Subject to Subpart C (>30 MMBtu/hr aggregate heat input capacity)
– Facility has potential to emit in excess of 25,000 MT CO2e from
combustion equipment
– Actual emissions are well below reporting threshold -> do not expect
to have to report
AB-32
– Subject as a general stationary combustion facility
– Facility has potential to emit in excess of 25,000 MT CO2e from
combustion equipment
– Actual emissions are well below reporting threshold -> did not have
to report for 2009 and do not expect to have to report for 2010.
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Recent and Emerging Regulations and how they
affect EnerTech (cont.)
Tailoring Rule
– Rialto facility is not an existing PSD or Title V facility (Step 1)
– Rialto facility’s potential to emit (PTE) is well below 100,000 tpy CO2e (Step 2
threshold) and 50,000 tpy CO2e, respectively (Step 3 threshold).
CISWI
– Solid waste definition has not yet been finalized
– Submitted comments on Proposed Rule, Identification of Non-Hazardous
Materials that are Solid Waste (40 CFR Part 241), dated June 4, 2010
Boiler MACT
– Rialto facility is not a major source of HAPs
Boiler Area Source Rule
– Process heater is natural-gas fired
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Thank You
Justine Harrison, P.E.
EnerTech Environmental, Inc.
phone: (404) 856-5849
[email protected]
www.enertech.com
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EnerTech Environmental, Inc. 2010. All rights reserved.