Barwon Water is temporarily storing sludge from the wastewater treatment process in a lagoon across the road from the Black Rock Water Reclamation Plant. The mulch biofilter has now been fully installed at the sludge stockpile area. This follows extensive work with specialist consultants in sludge and odour management, who advised that the stockpile should remain undisturbed until its biological properties are stabilised. Removing the stockpile prematurely would risk a significant increase in odour, so this approach was chosen to minimise impacts to the neighbouring community.

The mulch biofilter, made from locally sourced organic woodchip and plant waste, acts as a barrier over the stockpile. It works through both physical absorption and biological processes, providing a surface for microorganisms to break down odours. Our rapid onsite trials demonstrated positive results in reducing odour emissions and we have now applied this solution to the stockpile.

We’ll continue to monitor the biofilter’s effectiveness and keep neighbours and the community updated as further actions are taken. Once the material is stabilised, our aim remains to reuse the biosolids, most likely as a beneficial soil conditioner via land application.

How to report odour issues to Barwon Water?

If you notice increased odour near your property, please call 1300 656 007 and press 2 for ‘service fault’ (available 24/7). Your feedback is invaluable in helping us respond quickly and coordinate with regulators. While the odour poses no physical risk to human or animal health, we recognise its impact and appreciate your patience and understanding as we continue to address these issues.

Learn more via our previous updates.