The numbers speak for themselves, according to the National Waste Report, Australia generated 30 million tonnes of organic material in 2016-17. Of this mass, about 6.7 million tonnes went to landfill (or 22 per cent) of which around 43 per cent is food waste according to the National Food Waste Baseline Report.
What are the benefits of composting?
There are many benefits to composting organics over sending them to landfill. Firstly, composting helps to recover nutrients and organic material that can regenerate soils, critical to agricultural productivity. Secondly, diverting organics from landfill reduces greenhouse gas emissions, odour and leachate.
Composting can also save council’s and ratepayers considerable expense. In the case of councils and shires that already have a kerbside garden organics recovery services, food can also be added at little cost, which currently can make up as much as 40 per cent of a kerbside rubbish bin.
Where is composting today?
Currently, about 42 per cent of households nationally have access to kerbside organics collection service according to the National Waste Report and 15 per cent have access to food and garden collection Services (FOGO).
South Australian households have the highest access to organic kerbside collections at 92 per cent, NSW 60 per cent and Victoria 56 per cent as reported by the federal Department of Environment and Energy in its report ‘Analysis of Australia’s municipal recycling infrastructure capacity’.
Strategically, each jurisdiction has a different approach to advancing their organics recovery and only Victoria has a dedicated organics resource recovery strategy. Overall, each state government has resource recovery targets for the next decade in the order of 65 per cent to 75 per cent for commercial and municipal streams. To achieve these targets the majority of tonnage will have to come from diverting organics including food waste to composting.
In terms of investment, NSW has the single largest funding program for organics recovery, with around $9 million per annum from 2017 to 2021 as part of the Waste Less, Recycle More. Victoria recently completed a $3.3 million organics recovery program and is currently focused on implementing its e-waste landfill ban and recycling challenges.
While Queensland does not have a specific organics’ program, funding is available through its Resource Recovery Industry Development Program. A key element of Western Australia’s new 2030 waste avoidance and resource recovery strategy is to have a consistent three bin kerbside collection system, including separation of food and garden organics from other waste categories, to be provided by all local governments in the Perth and Peel region by 2025.
How can we accelerate the diversion of organics from landfill in Australia?
While there is clear intent by each state and territory government to divert food and organics from landfill, the NWRIC, in consultation with the Australian Organics Recycling Association (AORA) has developed a four-part plan on how best to advance the composting sector.
1. Develop markets for compost
Further development of urban municipal and commercial markets has the potential to utilise large volumes of compost. Key markets include mine site rehabilitation and urban redevelopment such as highways. However, long term, agriculture has the potential to be the largest market for compost, improving soil carbon, providing healthy soils and promoting sustainable food production. Coordinated research and action that links organics diversion with the direct benefits of compost and soil carbon in agriculture is required to develop this market.
2. Long term planning for siting and protecting organic recycling facilities
In order to meet the recycling targets proposed in the state and national waste policies, Australia will need many new organics recycling facilities. The creation of organics recycling facilities requires appropriate sites and surrounding land buffers that are protected for the life of their operation. It is important that these sites are provisioned for in local and state government plans.
3. Reduce contamination in municipal and commercial waste derived compost
Compost derived from household and commercial bins can be contaminated with plastics and other undesirable materials. Through improved education and product stewardship, contamination can be reduced, and clean compost produced. Equally important will be ensuring that all compostable packaging used complies with Australian Standards for home composting AS 5810-2010 and or industrial composting AS 4736-2006 and is clearly labelled.
4. Enforcement of nationally consistent standards for the outputs from organics processing.
While most operators manufacture high quality organic products the presence of substandard products and facilities can undermine the market and damage consumer confidence. Therefore, the enforcement the existing standard for composting output AS4454 – 2012, Composts, soil conditioners and mulches is critical.
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Published on wastemanagementreview.com.au