Phosphorus Extraction from Waste Activated Sludge using Sulfuric Acid Leaching: Recovery P and Reduction P Leakage

Abstract

Better understand the extractability of phosphorus (P) recoverable made from sustainable activated sludge in order to drastically lessen reliance on non-renewable phosphorus sources. Sulfuric acid (H₂SO₄) concentration enhanced P-extraction efficiency. The experimental research design on acid leaching of was defined using the effect of time and concentration. The effect of H₂SO₄ concentrations upon P extraction was shown to be significant within that investigation. The best possible leach condition was waste activated sludge with 0.1 M H₂SO₄ in 30 mins, which also extracted 98% of a P and was employed for P precipitation. In the connection of pH 9 value and Mg/Ca=2, the efficiency of P recovery 93% substantially improved. The findings of this research are obligated to generate a comprehensive information on the acceptability of P-composite matter recovered from waste activated sludge in order to urge decision-makers to use it. This will also aid in attempting to close the P loop in the human environmental for food cultivation, as well as benefit of reducing P leakage of WAS to landfills.