Biosolids are the treated sewage sludge that is produced as a result of the wastewater treatment process. Biosolids are produced once sludge has undergone further treatment that reduces pollutant materials and disease causing pathogens. Previously sludge was put into landfill or pumped into the ocean. Now, in many places, it is recycled into biosolids. Biosolids have many applications. Currently the primary applications in fertilisers and compost.Did you know that Western Australia has a comprehensive biosolid management program? Biosolids are produced at three Perth wastewater plants and are utilised in agriculture in different locations across the state. You will probably find that bisolids are contained within the compost you are using on your garden.
In a global context of rising concern over climate change, environmental pollution and resource scarcity, there is a need to understand the beneficial uses of biosolids and have an opinion on their use in your environment. We hope this website provides a good start point for your biosolids learning journey.