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Landfill Gas and Biogas

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AGL owns and operates several renewable landfill gas and biogas (sewage) generation facilities across Australia.

Biogas, like solar and wind energy, is a renewable energy source produced from available raw materials and recycled waste. Biomass is a renewable energy source made from plants or plant materials. Bagasse is fuel made from sugar cane stalks. AGL owns and operates several renewable landfill gas and biogas (sewage) generation facilities across Australia.

These facilities, in addition to generating renewable energy, help to further reduce greenhouse gases by capturing and destroying methane, a greenhouse gas 21 times stronger than carbon dioxide.

AGL’s $16 million biogas utilisation project at Melbourne Water’s Western Treatment Plant in Werribee is the largest biogas power station in the southern hemisphere. The plant produces approximately 50,000 megawatt hours of renewable energy pa and cuts Australia’s greenhouse gas emissions by 50,000 tonnes a year. That’s enough electricity to power over 7000 households for an entire year. 

AGL's Landfill and Biogas Assets

Source Energy Capacity Site Commissioned  
Werribee Sewage Treatment Plant, VIC 
10 MW
June 2001 (Stage 1),  Jan 2006 (Stage 2),  April 2010 (Stage 3).
Shoalhaven Landfill Gas Abatement Facility (NSW)  1 MW February 2002
Woy Woy Landfill Gas Abatement Facility (NSW).
The facility is hosted by Gosford City Council, NSW
1 MW
August 2008
Glenorchy Gas Extraction and Generation Facility (TAS)
1.5 MW June 2009
Kincumber Landfill Gas Abatement Facility (NSW)
The facility is hosted by Gosford City Council, NSW
1 MW

August 2008
Rockingham Landfill Gas Power Generation Facility (WA) 2 MW November 2003
McRobies Gully Gas Power Generation Facility (Tas)
1 MW
March 2006

Werribee Sewage Treatment Plant 

The Werribee biogas generation facility captures methane from the anaerobic digestion of sewage waste water at the Melbourne Water Sewage Treatment Plant. This methane is then used to generate renewable power.

How does the facility operate?

The Werribee Sewage Plant receives Melbourne’s waste water and treats it via an anaerobic process. Portions of the lagoon receiving raw sewage are covered and oxygen is excluded. This causes an anaerobic reaction to take place during which methane gas is produced. This methane is captured and then used to fuel 7 x 1.06MW and 2 x 1.26 MW reciprocating engines for a total capacity of 10MW. The power station operates 24/7, 365 days per year.

What are the environmental benefits?

The capture of methane gas for electricity generation prevents its into the atmosphere while also displacing electricity that would otherwise be purchased from the Victorian grid. This facility contributes to helping Australia reduce greenhouse gas emissions by more than 400,000 tonnes of CO2e per annum.

This can be equated to:

  • Generating enough renewable energy to power the equivalent of 12,500 average Victorian households.
  • Greenhouse gas savings equivalent to taking 110,000 average Australian cars off the road.
Where is the facility located?

Werribee Sewage Treatment Plant, VIC.

What is the energy capacity?

10 MW.

When was the facility commissioned?

June 2001 (Stage 1).

Jan 2006 (Stage 2).

April 2010 (Stage 3).

Shoalhaven Landfill Gas Abatement Facility

AGL is committed to the reduction of greenhouse gas emissions and supporting sustainable development initiatives.

How does the facility operate?

The facility collects Landfill Gas (LFG) from sites used for Municipal Waste Collection. LFG is then transported via a complex network of wells and pipelines before being compressed and delivered to a spark ignition V12 reciprocating engine. This in turn drives a 1MW alternator. All renewable electricity is generated into the existing local grid supply. Not only did AGL design and construct the facility, AGL Energy Services employs its own qualified service technicians to deliver its maintenance and operations obligations.

What are the environmental benefits?

Landfill gas generation reduces greenhouse gas emissions by capturing methane (a powerful greenhouse gas) that would otherwise be released into the atmosphere, and instead using it as a fuel to generate renewable electricity with a lower greenhouse intensity than would otherwise be supplied from the grid.

This facility contributes to helping Australia reduce greenhouse gas emissions by more than an estimated 28,000 tonnes of CO2e per annum. This can be equated to:

  • Generating enough renewable energy to power the equivalent of approximately 800 average New South Wales households.
  • Greenhouse gas savings equivalent to taking approximately 7,800 average Australian cars off the road.
Where is the site located?

Flat Rock Road, West Nowra, NSW.

What is the energy capacity?

1 MW.

When was the facility commissioned?

February 2002.

Woy Woy landfill gas abatement facility 

Methane-rich gas is produced by decomposing organic waste from within the landfill site at Woy Woy, NSW. This project involves the extraction and combustion of landfill gas to generate electricity.

How does the site operate?

The gas is extracted from the landfill through an array of wells interconnected by a network of buried pipes. A blower is used to actively draw the landfill gas into the extraction system. The generator runs on landfill gas connected via an integrated circuit panel to a step-up transformer. High voltage electricity is exported to the grid from the transformer. The generator is located in an acoustically lined building that also houses the control room. The building and remaining plant are enclosed within a fenced compound. The station can be remotely controlled and monitored. The generator operates 24/7.

How much energy is generated? 

The plant produces approximately 7,800 MWh of electricity pa, which is expected to provide the annual electricity requirements of around 1,100 average households. 

What are the environmental benefits?

The extraction and combustion of landfill gas prevents its escape into the atmosphere and reduces greenhouse gas emissions. Utilising the gas produced in the landfill to generate electricity means AGL is also displacing electricity sourced from fossil fuels. This project saves more than 39,300 tonnes of CO2 pa. This can be equated into some easily communicated figures such as:

  • Removing more than 9,500 cars from the road for one year; or
  • The equivalent to planting around 146,600 trees.
Where is the site located?

The facility is hosted by Gosford City Council, NSW.

What is the energy capacity?

1 MW.

When was the site commissioned?

August 2008.

Glenorchy Gas Extraction and Generation Facility 

Methane-rich gas is produced by decomposing organic waste from within the landfill site at Jackson Street, Glenorchy. This project involves the extraction and combustion of landfill gas to generate electricity. 

How does the site operate?

The gas is extracted from the landfill through an array of wells interconnected by a network of buried pipes. A blower is used to actively draw the landfill gas into the extraction system. The generator runs on landfill gas connected via an integrated circuit panel to a step-up transformer. High voltage electricity is exported to the grid from the transformer. The generator is located in an acoustically lined building that also houses the control room and workshop in separate rooms. The building and remaining plant are enclosed within a fenced compound. The station can be remotely controlled and monitored. The generator operates 24/7.

How much energy is generated?

The plant produces approximately 11,800 MWh of electricity pa, which is expected to provide the annual electricity requirements of around 1,600 average households. 

What are the environmental benefits?

The extraction and combustion of landfill gas prevents its escape into the atmosphere and reduces greenhouse gas emissions. Utilising the gas produced in the landfill to generate electricity means AGL is also displacing electricity sourced from fossil fuels. This project saves more than 57,400 tonnes of CO2 pa. This can be equated into some easily communicated figures such as:

  • Removing more than 14,000 cars from the road for one year.
  • The equivalent to planting around 217,400 trees.
Where is the site located?

Jackson Street, Glenorchy City Council, Tasmania.

What is the energy capacity?

1.5 MW.

When was the site commissioned?

June 2006.

Kincumber Landfill Gas Abatement Facility 

Methane-rich gas is produced by decomposing organic waste from within the landfill site at Kincumber, NSW. This project involves the extraction and combustion of landfill gas to generate electricity.

How does the site operate?

The gas is extracted from the landfill through an array of wells interconnected by a network of buried pipes. A blower is used to actively draw the landfill gas into the extraction system. The generator runs on landfill gas connected via an integrated circuit panel to a step-up transformer. High voltage electricity is exported to the grid from the transformer. The generator is located in an acoustically lined building that also houses the control room. The building and remaining plant are enclosed within a fenced compound. The station can be remotely controlled and monitored. The generator operates 24/7.

How much energy is generated?

The plant produces approximately 7,800 MWh of electricity per annum, which is expected to provide the annual electricity requirements of around 1,100 average households.

What are the environmental benefits?

The extraction and combustion of landfill gas prevents its escape into the atmosphere and reduces greenhouse gas emissions. Utilising the gas produced in the landfill to generate electricity means AGL is also displacing electricity sourced from fossil fuels. This project saves more than 35,600 tonnes of CO2 pa. This can be equated into some easily communicated figures such as:

  • Removing more than 8,600 cars from the road for one year.
  • The equivalent to planting around 133,000 trees.
Where is the site located?

The facility is hosted by Gosford City Council, NSW.

What is the energy capacity?

1 MW.

When was the site commissioned?

August 2008.

Rockingham Landfill Gas Power Generation Facility 

Methane-rich gas is produced by decomposing organic waste from within the landfill site at Millar Road. This project involves the extraction and combustion of landfill gas to generate electricity. 

How does the site operate?

The gas is extracted from the landfill through an array of wells interconnected by a network of buried pipes. A blower is used to actively draw the landfill gas into the extraction system. Two generators run on landfill gas with each generator connected via an integrated circuit panel to a step-up transformer. High voltage electricity is exported to the grid from the transformers. The generators are located in an acoustically lined building that also houses the control room and workshop in separate rooms. The building and remaining plant are enclosed within a fenced compound. The station’s operation can be remotely controlled and monitored. The generator operates 24/7.

How much energy is generated?

The plant produces approximately 15,700MWh of electricity pa, enough to supply more than 2,200 homes. 

What are the environmental benefits?

The extraction and combustion of landfill gas prevents its escape into the atmosphere and reduces greenhouse gas emissions. Utilising the gas produced in the landfill to generate electricity means AGL is also displacing electricity sourced from fossil fuels. This project saves more than 5,200 tonnes of CO2 pa. This can be equated into some easily communicated figures such as:

  • Removing more than 20,700 cars from the road for one year.
  • The equivalent to planting around 317,900 trees.
Where is the site located?

Millar Road, Rockingham Waste Disposal Facility, Baldivis, Rockingham, WA.

What is the energy capacity? 

2 MW.

When was the site commissioned?
November 2003.

McRobies Gully Gas Power Generation Facility

Methane-rich gas is produced by decomposing organic waste from within the landfill site at McRobies Gully. This project involves the extraction and combustion of landfill gas to generate electricity.

How does the facility operate?

The gas is extracted from the landfill through an array of wells interconnected by a network of buried pipes. A blower is used to actively draw the landfill gas into the extraction system. The generator runs on landfill gas connected via an integrated circuit panel to a step-up transformer. High voltage electricity is exported to the grid from the transformer. The generator is located in an acoustically lined building that also houses the control room and workshop in separate rooms. The building and remaining plant are in turn enclosed within a fenced compound. The station can be remotely controlled and monitored. The generator operates 24/7.

What are the environmental benefits?

Landfill gas generation reduces greenhouse gas emissions by capturing methane (a powerful greenhouse gas) that would otherwise be released into the atmosphere, and instead using it as a fuel to generate renewable electricity with a lower greenhouse intensity than would otherwise be supplied from the grid. 

This facility contributes to helping Australia reduce greenhouse gas emissions by more than an estimated 27,000 tonnes of CO2e pa. This can be equated to:

  • Generating enough renewable energy to power the equivalent of approximately 800 average Australian households.
  • Greenhouse gas savings equivalent to taking approximately 7,500 average Australian cars off the road.
Where is the site located?

The facility is hosted by Hobart City Council, Tasmania.

What is the energy capacity?

1 MW.

When was the site commissioned?

March 2006.a

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