Dakabin Waste Facility

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1 Dakabin Waste Facility WASTE MANAGEMENT BALANCING ENVIRONMENTAL PROTECTION AND THE BUILT ENVIRONMENT Christopher Vakas Principal Waste Facilities Officer 14 September 2016

2 Waste Management Statistics The Moreton Bay Regional Council Third largest Council by population in Australia. Covers 2,037 square kilometres Population of approximately 417,000 (2015); predicted 533,000 by Recycling 47% of the total waste stream 2015/16 176,439 tonnes of waste sent to landfill for disposal Free tipping for local residents Lowest waste levies in South East Queensland.

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4 Waste landfilled per facility and their corresponding life expectancies Facility Waste Landfilled Life Expectancy (Tonnes/Year) (Years) Bunya 24, Caboolture 54, Dakabin 96,914 5* Total 176,439 *Currently working on extension of Dakabin Stage 3. Once approved, life expectancy to increase an additional 15 years.

5 Percentage of recycling for waste streams Waste Stream MBRC Recycling (%) Municipal Solid Waste (MSW) Commercial & Industrial Construction and Demolition QLD Baseline (%) QLD 2024 Target (%)

6 Dakabin Waste Facility Opened 1987 stage 1 as an unlined landfill Area in Ha Waste to landfill 96,914 tonnes 2016 Current life of landfill 5 years Waste recycling self haul at 60% 187,221m3 of landfill gas flared to control CH4 emissions Carbon abatement of 1,333 Tonnes of CO2 equivalent 6 Ha of cattle grazing on stage 1 5 Ha of wildlife habitat

7 Dakabin Waste Facility

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10 Environmental Regeneration and Protection Why start remediation on a working landfill? Most significant environmental impacts from landfills are Leachate generation and landfill gas production Other significant environmental and nuisance impacts odour, dust, noise and wind blown litter.

11 Leachate Generation During a rain event any water that percolates through the landfill system creates leachate. Leachate composition consists of four main groups: dissolved organic matters - volatile fatty acids or humic-like substances; inorganic macro-components - calcium, magnesium, sodium, potassium, ammonium, iron, magnesium, chloride, sulphate, and hydrogen carbonate; heavy metals - cadmium, chromium, copper, lead, nickel, and zinc; xenobiotic organic compounds - chlorinated organics, phenols, and pesticides (Kjeldsen et al, 2002; Renou et al, 2008). Leachate harms surface water bodies by depleting dissolved oxygen (DO) and increasing ammonia levels in turn altering the flora and fauna of the water body.

12 Leachate minimisation and control The best way to minimise leachate is preventing rain and surface runoff entering the landfill cell. Landfill cover shed water Diversion drains divert water Small tipping face small exposed footprint Leachate is recirculated into the landfill and excess leachate is disposed of off site.

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14 Considerations Encroaching higher density development. Protect environmental values as population increases. Projected landfill life with stage 3 is 20 years. 2 million tonnes of waste yet to be landfilled.

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16 2016

17 Infrastructure Greening Project Council embarked on the largest environmental regeneration project in the regions history. This project challenges current landfill management ideology. The Green Infrastructure project aims to replant approximately 5 hectares of open eucalypt forest to provide long term habitat for koalas. Improve connectivity for wildlife moving through the site. This year some 40,000 native trees and shrubs were planted creating an environmental corridor buffer zone habitat of an additional 5 Ha. Capped portions of the landfill to the east and west are now fully planted. Portions of the site to the north and south have also had final capping and have been planted out.

18 Regeneration of native habitat A significant population of urban koalas are at risk from habitat loss in Dakabin. This project provides legally secured habitat to support the viability of local koalas in the area. As well as koala habitat, the ecosystem being restored is endangered scribbly gum forest - less than 10% of this forest type remains in the world.

19 Regeneration of native habitat To ensure genetic diversity, seed from the adjacent conservation area and from forest within the Dakabin site itself is being collected and grown on to enhance the biodiversity of the buffer planting. Another 9800 shrubs to be planted in April The majority of the planting area is now conservation protected under State legislation. A further 1 Ha of new and infill planting is underway to enhance native habitat. Dakabin Waste Facility is transitioning to a clean and green koala and wildlife habitat.

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21 Zone 1

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26 Landfill Gas to Energy Plant (LGEP) Commenced November 2015 Landfill gas collection Area currently 22 Ha Gas extraction wells 67 Engine Jenbacher Green Energy Plant V20 1MW / Hour output Cost $3,100,000 Consumes approximately 1,500 Tonne of CH4 each year Abates 32,000 Tonnes of CO2e each year Generates up to 8760MWH of electricity per year Powers 1,500 homes in the area plus the landfill Power generation 50 + years

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28 Dakabin Waste Facility

29 Dakabin Waste Facility

30 Current Situation Landfill Gas to Green Energy Project - Plant has averaged greater than 95% availability over this period, - Consumed 3,978,667m3 of landfill gas, representing a carbon abatement of approximately 28,341 tonnes of CO2 equivalent, - Generated 5,445 MWh. Infrastructure Greening Project - Over 40,000 plants in ground during 2016 creating 5 Ha wildlife corridor - Greater than 85% of planting survival - 6 Ha cattle grazing

31 Environmental Benefit One LFGE at 1MW/Hour is equivalent to - Removing 6,300 cars from the road, or - Preserving 323 acres of forest from deforestation, or - Recycling 10,300 tonnes of waste material diverted from landfill. 40,000 mature trees and shrubs is equivalent to - Approximately 5000 tonnes of CO2e annually, or - Removing 3,000 cars from the road - Scribbly gum forest regrowth - Urban koala habitat for local koala population

32 Thank you Questions?