In today’s world, where environmental concerns are at the forefront, finding sustainable alternatives to everyday products is essential. Compostable bin bags have emerged as a simple yet effective way to contribute to a greener planet. These eco-friendly alternatives are gaining popularity not only in Australia but worldwide, as people become more conscious of their impact on the environment. 


But how do compostable bags affect the environment?


Compostable bin bags are designed to be a planet-friendly alternative to traditional plastic bags. They are made from natural materials like cornstarch, potato starch or sugarcane, which are biodegradable and break down into organic matter. Unlike plastic bags that linger in landfills for centuries, compostable bin bags decompose within a few months, leaving no harmful residue behind. These bags are a crucial part of the circular economy, where waste is transformed into valuable resources.


In this article, we’ll explore how compostable bin bags align with the principles of ‘Reduce, Reuse, Recycle’, as well as their benefits and how they fit into our daily lives.

Reducing Waste: The First ‘R’

The first step in sustainable living is reducing waste. Compostable bin bags play a significant role in this endeavour. By using these bags, you minimise the amount of non-recyclable and non-biodegradable waste heading to landfills. Traditional plastic bags can take up to 1,000 years to decompose, releasing harmful toxins into the environment as they break down. 


Compostable bin bags, on the other hand, reduce this burden by breaking down naturally and returning valuable nutrients to the soil. They break down relatively quickly under the right conditions. When disposed of in composting systems or facilities, they decompose into organic matter within a matter of months. This reduces the prevalence of plastic waste in the environment, minimising harm to wildlife and ecosystems.

Reusing Resources: The Second ‘R’

Compostable bin bags are not a one-time-use solution. Just like their plastic counterparts, they are sturdy and reliable. You can use them multiple times, whether for kitchen waste, garden clippings or even as storage bags. When these bags eventually reach the end of their lifecycle, they can be safely composted, giving rise to a sustainable loop. This reusable nature aligns perfectly with the ‘Reuse’ principle, which ensures that resources are maximised before disposal.

Recycling the Right Way: The Third ‘R’

Recycling is another important aspect of sustainable living, but not all materials can be effectively recycled. Plastic bags are notorious for causing issues in recycling facilities. They often get tangled in the machinery, leading to inefficiencies and added costs. 


Meanwhile, compostable bin bags, being biodegradable, don’t pose this problem. When disposed of correctly in composting facilities, they contribute to the creation of nutrient-rich compost that can be used to enrich soil and promote plant growth. It’s recycling in its purest form.

Are Compostable Bags Really Compostable?

Compostable bags are designed to be compostable under specific conditions, but it’s essential to understand that not all compostable bin bags are the same, and their compostability depends on several factors, such as:


  • Compostable Material: Compostable bin bags are typically made plant-based materials, which are biodegradable and can break down into organic matter under the right conditions.


  • Proper Composting Conditions: Compostable bin liner bags will only fully compost in an industrial composting facility or a home composting system that meets specific temperature and moisture requirements. These conditions include maintaining a high enough temperature for decomposition and providing adequate moisture, aeration and microbial activity.


  • Time Frame: Composting times can vary depending on the material and conditions. In industrial composting facilities, compostable bin bags may break down within a few months. In a backyard compost pile, it could take longer.


  • Certifications: Look for compostable bin liner bags that carry certifications such as AS 4736-2006 and AS 5810-2010 in Australia. These certifications indicate that the bags meet specific compostability standards and are more likely to break down as intended.


  • Separation from Other Waste: To ensure proper composting, compostable bags should be segregated from regular trash and disposed of in composting bins or facilities. Mixing them with non-compostable waste can hinder their decomposition.


  • Environmental Conditions: The effectiveness of compostable bags can also depend on local environmental conditions. For example, composting may occur more rapidly in warmer, humid climates compared to dry, cold regions.


Keep in mind that compostable bags may not fully degrade in a typical landfill environment because landfills lack the necessary conditions for rapid decomposition, such as oxygen and microbial activity. In landfills, compostable bin bags can persist for longer periods, similar to traditional plastics.

Frequently Asked Questions

Q: Can compostable bags go in the green bin?

A: Yes, in many Australian regions, you can put compostable bags in the green bin. The green bin is typically designated for organic waste, including food scraps and yard trimmings. Compostable bin bags are suitable for containing such organic materials and can be included in your green bin for composting at the local composting facility.


Q: Can I put compostable bags in my compost bin?

A: Yes, you can put compostable bags in your home compost bin, provided that your composting setup meets the necessary conditions for composting, such as appropriate temperature, moisture and microbial activity. 


Q: Can compostable bags go in red cycle bins?

A: No, compostable bags should not be placed in red cycle bins. Red cycle bins are typically meant for recyclable materials like paper, cardboard, glass and certain plastics. Compostable bin bags are designed for composting, not recycling. To dispose of them correctly, use your green bin for compostable bags or follow local waste disposal guidelines.


Q: Can compostable bags go into the food bin?

A: Yes, compostable bags are suitable for use in the food bin. Food bins are designed for collecting food scraps and organic waste, and compostable bin bags can help keep these materials contained and make it easier to manage kitchen waste. Just make sure the bags you use are certified as compostable and comply with local regulations.


Q: Where can I get kitchen compost bin bags?

A: You can find kitchen compost bin bags at various retailers across Australia. For the best quality, get yours at Bonnie Bio Australia. Our compostable products meet rigorous standards and conform with Australasian Bioplastics Association Quality Control AS 4736-2006 and AS 5810-2010. 


Q: Are compostable garbage bags biodegradable?

A: Yes, compostable garbage bags are biodegradable. They are designed to break down into natural components under specific conditions, including microbial activity and appropriate composting conditions. This biodegradability is a key feature that distinguishes them from traditional plastic garbage bags, which do not readily biodegrade.


Q: Are compostable bags recyclable?

A: Compostable bags should not be included in recycling bins designated for traditional recyclables like paper, cardboard and certain plastics. They are designed for composting, not recycling. Recycling and composting are distinct processes, so it’s essential to dispose of compostable bags in the appropriate bin or facility.


Q: Can compostable plastic be composted?

A: Yes, compostable plastics, including compostable bags, can be composted. However, it’s crucial to ensure they are sent to an industrial composting facility or a home composting system that meets the necessary conditions for composting, including temperature, moisture and microbial activity. Composting is the appropriate disposal method for compostable plastics to maximise their environmental benefits.

Bonnie Bio: Sustainable Compostable Packaging in Australia

At Bonnie Bio, we are committed to providing sustainable compostable packaging solutions for our Australian customers. Our range of compostable bin bags, made from renewable resources, exemplifies our dedication to a greener planet. With Bonnie Bio’s compostable bin liners, you have a simple yet powerful way to make a positive impact on the environment while enjoying the practical benefits they offer.


For more details about our products, contact us.