enertech environmental, inc. 2010. all rights reserved. enertech: converting biosolids into...

EnerTech Environmental, Inc. 2010. All rights reserved.

EnerTech: Converting Biosolids into Renewable Fuel

Air and Waste Management Association Fall Conference

Atlanta, Georgia

PROTECTING PUBLIC HEALTH AND THE ENVIRONMENT FOR GENERATIONS TO COME.

October 7, 2010

2 EnerTech Environmental, Inc. 2010. All rights reserved.

Contents

Company Overview

The SlurryCarb® Process

Rialto Facility

Energy Advantage

Carbon Benefits

Regulatory Overview


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


The SlurryCarb® Process

AD = biogas


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


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)

Benefits of SlurryCarb® (cont.)


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.

(1) 1 kWh = 3,413 Btu(2) Assumes 8,230 Btu/lb dry eFuel from undigested sludge

(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

eFuel82 tons(2)

173 MMBtuDigester Gas

60 MWH(4)

Electrical Power

400 WTPD(1)

Biosolids

441 MMBtu(3)

Natural GasEnergy Consumed (MMBtu)

Net natural gas 441

Electric power(1) 205

Total Energy Consumed 646

Energy Produced (MMBtu)

eFuel(2) 1,350

Net Energy 704


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:

– Costs less than coal

– Reduces emissions of SO2

– Reduces GHG emissions

– Increases use of renewable energy


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

Rialto SlurryCarb® FacilityRenewable Fuel from Biosolids


The Rialto SlurryCarb™ Facility

Biosolids from the region

The Rialto Facility~170 TPD eFuel to

cement kiln

Current stakeholders include five municipalities:LACSD 208 wtpdOCSD 225 wtpdCity of Riverside 150 wtpdCity of San Bernardino 75 wtpdCity of Rialto 25 wtpd

683 wtpd


Receiving Pit


Biosolids Storage Silos

April 2009


SlurryCarb® Area


Dryer Area and eFuel Silo


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

1 US DEPARTMENT OF ENERGY2 2000 CENSUS


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


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


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


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


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

Rialto Life Cycle Analysis of GHG Emissions (cont.)

Compare SlurryCarb + eFuel to a Kiln to:


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


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.


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


Thank You

Justine Harrison, P.E.EnerTech Environmental, Inc.

phone: (404) [email protected]

www.enertech.com

enertech environmental, inc. 2010. all rights reserved. enertech: converting biosolids into...

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