The traditional method of covering daily general waste in landfills uses clean fill (soil). Clean fill helps reduce odour, limit rainwater infiltration, prevent vermin access, and deter fires. However, a major downside is it causes landfill sites to fill up faster. This reduces the number of years a waste facility remains operational.
To address this issue, and to find a more sustainable solution, Council trialled an innovative alternative cover material (ACM) in 2018. After a successful trial, ACM is now used in combination with clean fill (when required) at our three active landfill sites: Bunya, Caboolture, and Dakabin waste facilities. The trial was initiated to extend the lifespan of the landfills and to enhance waste management practices by reducing reliance on clean fill.
The ACM is made from 100% biodegradable clay and cellulose fibre polymers. It is specially formulated for use in landfills and hazardous site rehabilitation. ACM offers several environmental benefits and provides a sustainable alternative to clean fill.
The advantages of using ACM in landfill operations include a reduction in:
- rainfall infiltration
- odour
- dust
- fire risk
- vermin
- erosion.
It also plays a key role in extending the life of our facilities. By reducing wind-blown litter and the need for clean soil as a day cover, ACM contributes to a safer and cleaner landfill environment.
Although there is a short-term cost impact associated with using ACM, the long-term benefits, such as the significant extension of the landfill's lifespan, offer a return on investment in the future.