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Turning sludge to biosolids to create maximum value and resources
A range of processes are required to remove potential health risks, remove water and reduce the volume and weight of sludge to improve the costs and options for disposal. With the correct treatment, sewage sludge can be transformed from what was considered a waste into a valuable resource and product, also known as biosolids or bioresources. The biosolids are produced after wastewater goes through physical, chemical and biological processes to clean the wastewater and remove the solids. Biosolids can be used as an alternative to manufactured fertilisers to help play a role in soil quality and fertility improvements, as well as stimulate plant growth. As well as the potential production of an agricultural fertiliser, industrial and municipal sludge can be used to produce a biogas for power generation. Depending on the country, biosolids must meet strict regulation and quality standards before being applied to land.