The use of Agri-Ash in this way offers the benefit of recycling sewerage waste. This makes it an ideal liming agent, and it may be used as an alternative to agricultural lime to correct soil acidity. These chemicals react with soluble phosphorus in the sewage to form insoluble compounds. The compounds, and other solids, are collected and removed as lime-rich sludge.
Water is removed from the sludge by centrifugation.
The benefit of high temperature processing is that Agri-Ash is sterile. These calcium compounds neutralise soil acidity. Nearly all the metals are locked up in insoluble forms, and will not harm pastures or livestock.