Biosolids – what are they?
Sewage sludge produced at our sewage treatment plants is called biosolids. Biosolids contain significant quantities of organic matter, moisture, plant nutrients, trace elements, chemical contaminants and potentially harmful microorganisms.
EPA Victoria regulates biosolids production, quality and usage to maximise reuse while protecting the environment and public health
Biosolids drying pan at Cowes Waste Water Treatment Plant
Biosolids stockpiles at Cowes Waste Water Treatment Plant
How we manage biosolids
We produce about 500 dry tonnes of biosolids every year. Our aim is to use all biosolids produced for beneficial land applications. We have developed a Regional Environment Improvement Plan approved by the EPA Victoria to manage biosolids reuse. Download the plan in PDF format
- Human food crops consumed raw in direct contact with biosolids; includes lettuces, strawberries and carrots
- Dairy and cattle grazing/fodder (also poultry)
- Processed food crops
- Sheep grazing and fodder (also horses and goats), on non‐human food crops such as turf, woodlots, flowers and ornamental plants (not for human consumption)
- Landscaping with unrestricted public access, forestry and land rehabilitation
Biosolids stockpile on farm
Spreading Biosolids on farm
Biosolids for farming
We have a strong partnership with the local farmers and provide technical support and financial assistance to promote farm application of biosolids in Philip Island. Biosolids are being successfully used for fodder production.
Incorporating biosolids
Biosolids applied land