Leslie Massey
Biofuels are made from renewable materials such as vegetable and animal products. In Australia, ethanol is a type of biofuel that is made by fermenting biomass using glucose from sugar or starch. The largest ethanol producer in Australia is the Manildra Group, which produces 300 million litres of ethanol using wheat waste starch. Despite the existence of government mandates in Queensland and New South Wales, ethanol consumption in Australia has remained low in recent years. However, Australia is well-placed to provide key inputs for global biofuel production, and there is ongoing research into the development of first- and second-generation biofuels.
| Characteristics | Values |
|---|---|
| How is ethanol made? | Ethanol is a colourless alcohol made by the fermentation of biomass, using glucose derived from sugars (e.g. sugar cane, sugar beet, or molasses), starch (corn, wheat, and grains), or cellulose (forest products). |
| Ethanol production in Australia | In 2021, Australia produced 180 million litres of fuel ethanol, with three major fuel ethanol production facilities. The largest ethanol producer in Australia is the Manildra Group in Bomaderry, which produces 300 million litres of ethanol using wheat waste starch. |
| Feedstocks for ethanol production | Feedstocks for ethanol production include maize, sugar cane, oilseeds, rice, coarse grains, and cellulosic biomass. Australia has large feedstock supplies for bioethanol, including grains and molasses. |
| Biofuel consumption in Australia | Biofuel consumption in Australia has remained low in recent years, with ethanol consumption forecast to remain stable at 1.1% of the gasoline pool in 2022. However, Australia is well-placed to provide key inputs to global biofuel production. |
| Biofuel mandates in Australia | Two states, Queensland and New South Wales, have introduced biofuel mandates. New South Wales requires bioethanol to constitute 6% of petrol sales, while Queensland's mandate requires ethanol to make up 3-4% of total regular and ethanol-blended unleaded petrol sales. |
| Benefits of biofuels | Biofuels are made from renewable materials such as vegetable and animal products, reducing dependence on non-renewable resources like crude oil. Biofuels can also help reduce greenhouse gas emissions and energy price volatility. |
| Challenges and controversies | There is limited mandate support, low international oil prices, high feedstock prices, and insufficient tax relief, which have led to the closure of some production facilities. There is also controversy surrounding the ethanol mandates in Queensland and New South Wales, with concerns about their impact on competitive dynamics and consumer costs. |
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What You'll Learn
Ethanol consumption in Australia
Ethanol is a biofuel made from renewable materials such as vegetable and animal products. It is a type of biofuel used for transport in Australia, in the form of ethanol-blended petrol. The two most common types of ethanol-blended petrol in Australia are E10 and E85, which contain up to 10% and up to 85% ethanol, respectively.
There is no federal government subsidy, tax credit, or mandate supporting the production or use of biofuels in Australia. However, two states, New South Wales and Queensland, have mandated the sale of ethanol-blended fuels and biodiesel. These mandates are far from being reached.
Australia has large feedstock supplies for bioethanol, such as grains and molasses, as well as robust supplies of feedstock for biodiesel production, including canola, tallow, and used cooking oil. In 2021, Australia produced 180 million litres of fuel ethanol and 18 million litres of biodiesel. The main feedstock of Australia's ethanol producers is wheat starch and molasses (from sugarcane). The main biodiesel feedstocks are tallow and vegetable oil.
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Biofuel feedstocks
Biofuels are made from renewable materials such as vegetable and animal products, including plant materials and animal waste. This is in contrast to petrol and diesel, which are derived from non-renewable resources like crude oil. The two main types of biofuels used for transport in Australia are ethanol and biodiesel.
Regarding biodiesel feedstocks, tallow and vegetable oil (used and virgin) are the main sources. Australia exported $5.76 billion worth of canola seeds in 2021-22, most of which will be used to make biofuel in the EU. Canola is also used as a biodiesel feedstock in Australia. Other potential biodiesel feedstocks under development in Australia include Indian mustard seeds, Millettia pinnata, Moringa oleifera, and algae.
While biofuels offer environmental benefits by reducing greenhouse gas emissions, the specific feedstocks used can impact emission levels. For instance, using an E10 blend with wheat results in a 1.7% reduction in greenhouse gases compared to unleaded petrol, while molasses yield a 5.1% reduction. Additionally, feedstock choices can influence biodiversity and carbon stocks due to the land use changes associated with biofuel crop cultivation.
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Biofuel production
The production of biofuels, such as ethanol, has become an increasingly important part of the global energy landscape, offering a renewable and sustainable alternative to fossil fuels. In Australia, the Biofuels Association is at the forefront of promoting and supporting the development and use of biofuels, including ethanol. So, how exactly is ethanol produced, and what are the key processes involved?
Ethanol can be produced from a variety of feedstocks, but in the context of biofuels, it is typically made from sugar or starch crops, such as sugarcane, corn, or wheat. The first step in ethanol production is the collection and preparation of the feedstock. For sugarcane, this involves harvesting and crushing the cane to extract the sugar-rich juice. With corn or wheat, the starch must first be converted into sugar through a process called saccharification, which involves breaking down the complex starch molecules into simpler sugar molecules using enzymes or acids.
Once the feedstock has been prepared and the sugar extracted, it is then fermented to produce ethanol. This is a natural process carried out by microorganisms, typically yeast. The yeast consumes the sugar and converts it into ethanol and carbon dioxide through anaerobic respiration. This step is crucial in determining the final ethanol concentration and purity, and it is carefully monitored and controlled to ensure an efficient and effective fermentation process.
After fermentation, the ethanol needs to be separated from the mixture. This is typically done through a distillation process, where the fermented broth is heated, and the ethanol is evaporated and then condensed back into a liquid form. This step helps to concentrate the ethanol and remove impurities, resulting in a higher purity product. Further purification steps may also be employed, such as dehydration to remove any remaining water and ensure a high-quality ethanol fuel.
The final step in biofuel production is the blending and distribution of the ethanol. In Australia, ethanol is typically blended with gasoline to create a fuel known as E10, which contains up to 10% ethanol. This blending process helps to improve the environmental performance of gasoline, reducing greenhouse gas emissions and air pollutants. The blended fuel is then distributed through the standard fuel supply chain, making its way to service stations and ultimately powering vehicles on the road.
The production of biofuels, such as ethanol, offers a range of benefits, including reduced reliance on finite fossil fuel resources, lower emissions, and support for rural economies through the use of agricultural feedstocks. Australia has made significant strides in this area, with the Biofuels Association of Australia playing a key role in promoting and supporting the development and use of biofuels. By understanding the process of ethanol production, from feedstock to finished fuel, we can better appreciate the potential of biofuels to contribute to a more sustainable and renewable energy future.
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Biofuel consumption
The process of making ethanol begins with the fermentation of sugars, which can be derived from a variety of feedstocks. In Australia, the primary feedstock used for ethanol production is sugarcane, with sugar beets also being used to a lesser extent. The fermentation process involves the use of yeast to convert the sugars into ethanol, yielding a mixture of ethanol and water. Distillation is then applied to increase the ethanol concentration and remove impurities. The distilled ethanol is then dehydrated to eliminate residual water, producing a pure ethanol product that can be utilized as a biofuel.
In Australia, ethanol is primarily consumed as a biofuel, and its use has been promoted as a way to reduce greenhouse gas emissions and enhance energy security. Ethanol is often blended with gasoline to create a fuel mixture known as E10, which consists of 10% ethanol and 90% gasoline. This blend is suitable for use in most petrol vehicles and is widely available at service stations across the country. E85, a mixture of 85% ethanol and 15% gasoline, is another type of ethanol fuel blend used in Australia, but it is less common and typically requires specially adapted flex-fuel vehicles.
The consumption of biofuels, including ethanol, offers several potential benefits. Firstly, they can contribute to reducing dependence on fossil fuels and enhancing energy security by providing a domestically produced and renewable alternative. Secondly, biofuels have the potential to reduce greenhouse gas emissions compared to traditional fossil fuels. This is because the carbon dioxide released during the combustion of biofuels is balanced by the CO2 absorbed during the growth of the feedstock plants, resulting in a more neutral carbon cycle.
However, it is important to note that the environmental benefits of biofuels depend on the specific feedstocks and production methods used. For example, if forests or grasslands are converted into cropland for growing biofuel feedstocks, it could result in a net increase in greenhouse gas emissions. Additionally, the water and fertilizer requirements for cultivating feedstocks can be intensive, potentially leading to water scarcity and soil degradation issues. Therefore, sustainable practices and the use of waste products or non-food feedstocks are crucial for maximizing the environmental benefits of biofuel consumption.
The Australian government has implemented various policies and initiatives to encourage the development and use of biofuels, including ethanol. These include the Australian Renewable Energy Agency (ARENA), which provides funding and support for renewable energy projects, and the Biofuels Act 2010, which aims to promote the sustainable production and use of biofuels. Additionally, the Biofuels Association of Australia plays a key role in advocating for the biofuels industry and promoting the benefits of biofuel consumption.
In conclusion, ethanol, as a biofuel, offers a promising alternative to traditional fossil fuels, with the potential to reduce greenhouse gas emissions and enhance energy security. The consumption of biofuels in Australia is primarily focused on ethanol, with sugarcane being the dominant feedstock. Through sustainable practices and supportive policies, Australia continues to promote the development and use of biofuels, contributing to a cleaner and more diverse energy landscape.
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Biofuel mandates
Biofuel is fuel produced from organic matter (biomass), including plant materials and animal waste. It is considered a renewable source of energy that helps to reduce carbon emissions. The two main types of biofuel currently produced in Australia are biodiesel and bioethanol, which are used as replacements for diesel and petrol, respectively.
The Queensland biofuels mandate, which commenced on 1 January 2017, has separate requirements for bio-based petrol and bio-based diesel. The bio-based petrol mandate requires that 4% of the total volume of regular unleaded petrol sales and ethanol-blended fuel sales by liable fuel retailers must be bio-based petrol (ethanol). The bio-based diesel mandate requires 0.5% of all diesel fuel sold by fuel wholesalers to be bio-based diesel (biodiesel).
The New South Wales mandate, introduced in October 2007, requires bioethanol to constitute 6% of petrol sales, meaning that 60% of all petrol sales need to be E10 (a blend of 10% ethanol and 90% unleaded petrol). The biodiesel mandate in New South Wales stipulates that biodiesel be at least 2% of all diesel sold.
There has been some controversy surrounding these ethanol mandates, with the Productivity Commission recommending in 2017 that both the NSW and Queensland mandates be axed by the end of 2018. The Commission argued that these mandates affect competitive dynamics and end up costing consumers more due to premium fuel substitutions.
Despite the limited mandate support at the federal level, research suggests that a national biofuel mandate in Australia could bring about significant benefits. A report by Queensland University of Technology (QUT) estimated that biofuels could deliver more than 8,000 direct and indirect jobs and generate $1 billion a year in revenue if a national mandate was implemented. Additionally, Australia has the resources to be a key player in global biofuel production, with large feedstock supplies for bioethanol and biodiesel production.
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Frequently asked questions
Biofuels are made from renewable materials such as vegetable and animal products. This is different from petrol and diesel, which are made from non-renewable resources like crude oil.
Two common biofuels used for transport in Australia are ethanol-blended petrol and biodiesel. E10 and E85 are types of ethanol-blended petrol, containing up to 10% and 85% ethanol, respectively.
Ethanol is a colourless alcohol made by the fermentation of biomass using glucose derived from sugars (e.g. from sugar cane, sugar beet, or molasses), starch (corn, wheat, and grains), or cellulose (forest products).
Biofuel consumption in Australia has remained low in recent years, despite efforts to introduce new fuel standards. Australia has significant feedstock supplies for bioethanol production but only a small amount is used domestically. The majority of Australia's canola seed exports are used for biofuel production in the EU.
Australia faces challenges such as limited mandate support, low international oil prices, and high feedstock prices. However, there is a push for the development of new feedstocks and technology, and organisations like Bioenergy Australia are advocating for more support for local producers to meet global demand and supply chain disruptions.
