Department Update County of Maui Department of Environmental - - PowerPoint PPT Presentation

Department Update

County of Maui Department of Environmental Management

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• Dept. of Environmental Mgmt. Update

Energy Optimization Measures

• Priority on energy conservation and

improved mechanical efficiencies

• Focus on development of energy generation
• pportunities at each facility
• Idea that our influent streams are not

"wastes", but are instead resources

How do we cut costs and monetize resources?

• Dept. of Environmental Mgmt. Update

Energy

_Optimization

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• Install mechanical equipment upgrades, such as

pumps, blowers, etc. with greater efficiencies

• Monitor peak electricity load with optimal

starts/stops of high load equipment

• Develop wastewater process studies to improve

treatment efficiencies and reduce electricity costs

• Optimize residential refuse collection routes to

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Energy reduction at the source is ideal.

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County of Maui

• Dept. of Environmental Mgmt. Update

Other In-Progress

• 0#wEnergy Efforts
• Photovoltaic Energy Systems

—Lahaina and Kihei WWRF — 1.5 MW —Lanai and Hana Landfills — 3.0 kW

• Landfill Gas to Energy System

—Central Maui Landfill — 1.6 MW

• Wind Energy Systems

—Central Maui Landfill — 19.2 kW

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Energy generation will help offset rising rates.

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July 30, 2012 4 County of Maui

• Dept. of Environmental Mgmt. Update

Upcoming Energy Efforts

• Disposition of green waste/biosolids/FOG

Current contract with EKO Compost ends 6/13 Potential opportunity exists to create energy through anaerobic digestion or other technology

• Disposition of municipal solid waste

Landfilled waste has potential energy value

• Energy revenue may reduce General Fund subsidy

The future is now for waste conversion.

• Dept. of Environmental Mgmt. Update

GW/Sludge/FOG Project

• RFP will be issued in Sept. 2013
• Anticipated developers are static pile

composters, in-vessel composters, and anaerobic digestion energy purveyors

• Exploring viability at Kihei WWRF and at

including food waste THI\I --14411411

Food waste represents over 20 percent of MSW.

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• Dept. of Environmental Mgmt. Update

Digestion Flow Stream

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Heat Recovery

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Generator Liquid Effluent

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• Dept. of Environmental Mgmt. Update

Waste Conversion Project

• Request for Qualifications issued on 3/18/12
• 23 respondents with projects ranging from 5-

20 MW

Very strong interest in the industry for Maui

• Various technologies proposed, including

mass burn, gasification, plasma arc, anaerobic digestion, and pyrolysis

More developers will propose in the RFP.

Feed Metering

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Storage Power Generation

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Receiving Sorting and Recycling

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Gas Storage

• Dept. of Environmental Mgmt. Update

Waste Conversion Flow Stream

Gasification Process

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Green Waste, 14.5% Metals, 4.7%

IIHW, 0.2% Organics, 24.9% Problem Materia ls,

13% Paper, 24.3%

Wood, 7 tic, 12.3%

• Dept. of Environmental Mgmt. Update

CML Waste Stream

Durables, 1.8% Inorganics, 6.0%Glass, 3.0% July 30, 2012 10 County of Maui

• Dept. of Environmental Mgmt. Update

Waste Conversion Project

• RFQ structured where the developer

finances, plans, designs, builds, owns, maintains and operates

• County would lease a parcel of land makai of

the Central Maui Landfill for the facility

• County would guarantee sending the MSW

to the facility for 20 years 0 rt

The County shoulders minimal risk.

• Dept. of Environmental Mgmt. Update

Waste Conversion Project

• All proposals guarantee environmental

benefit

Landfilling, methane gas generation, and importation of fossil fuels versus facility emissions

• Potential commercial operation in 2015/16
• Landfill tip costs will reduce significantly

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CML life will extend significantly with project.

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Current Tipping Fee

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$71/ton

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• Dept. of Environmental Mgmt. Update

Waste Conversion Project

20 40 60 80 100 120

Tipping Fee ($/ton)

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County of Maui

• Dept. of Environmental Mgmt. Update

Waste Conversion Next Steps

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• Department is p

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par the RFP

• RFP will be issued in September 2012
• RFP will be due by the end of 2012
• Developer will be selected in January 2013
• Analysis will be complete in January 2013

for discussion prior to the FY 2014 budget

Key decisions are necessary in January 2013.

• Dept. of Environmental Mgmt. Update

Summary

• The department's efforts to tackle rising

energy costs are multi-faceted

Energy conservation/efficiency are ongoing Small/mid scale energy generation projects are in-progress Large scale energy generation projects are imminent

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The disposition of waste resources will change.

• Dept. of Environmental Mgmt. Update

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Thank you

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THINK GREEN