Glendale Water & Power Proposed Biogas Renewable Generation - - PowerPoint PPT Presentation

Proposed Biogas Renewable Generation Project

City Council In Your Neighborhood August 21, 2018

Glendale Water & Power

Scholl Canyon

• 1994: Dedicated the Scholl Canyon Landfill Gas Recovery Project

installing gas processing equipment at the landfill and a 5-mile pipeline that transports biogas produced at the landfill to selected steam boilers at the Grayson Power Plant where it is blended with natural gas.

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Proposed Project Site

• The proposed Biogas Renewable Generation Project will be located

at the existing processing/maintenance site and naturally occurring gas will be extracted, conditioned, and combusted in reciprocating engines to produce approximately twelve megawatts of renewable electricity.

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Project Benefits

• Naturally occurring landfill gas = fuel for generating “green”

electricity.

• Effectively destroying harmful methane content of the gas.
• Renewable energy resource to meet Renewable Portfolio

Standards.

• No electric transmission facility upgrades required. Use existing

transmission to deliver the renewable power into the electrical grid.

• Abandon existing landfill gas pipeline from the landfill to the

Grayson Power Plant and eliminate long-term maintenance costs

• Cleaner burning option at the landfill site per AQMD criteria
• Reducing emissions at the current Grayson Power Plant, recent HRA

results confirm

• Eliminate flaring and wasting renewable commodity

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Project Information

• Located at existing Class II nonhazardous landfill that has been

accepting waste since the 1960’s.

• Decomposing waste naturally produces combustible biogas
• Biogas is currently collected at a central location. It is compressed

and liquids are removed.

• A repowered Grayson will be incompatible with the use of biogas as

fuel.

• Available biogas options are –

– Incinerating it in a flare – Clean and sell as recycled natural gas – Operate electric producing micro turbines with biogas as fuel – Operate reciprocating engines for the generation of local renewable electricity using biogas fuel

• Combusting biogas in a specially designed reciprocating engine and

producing electricity is more environmentally efficient and a cost effective process

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Cost Impact

• Estimated cost $30 million
• Based on cost and renewable value of the Biogas the

return on investment on the project is approximately eight years.

• Most viable options explored:

– Clean-up and reuse – Turbine technology – Sale of raw gas

• Proposed project was the best economic option for

GWP

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Next Steps

• The Request for Proposal for the EIR was issued 8/2/18
• Proposed Project Schedule

– RFP responses due – 9/7/18 – Award of contract – 9/25/18 – Completion of Draft EIR – 6/30/19 – Completion of Final EIR – 9/2/19

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