A bench-scale assessment for phosphorus release control of sediment by an oxygen-releasing compound (ORC)

An oxygen slow-releasing material and its application in water remediation as oxygen supplier

In this study, an oxygen slow-releasing material (OSRM) consisting of calcium peroxide (CaO₂), stearic acid (SA) and quartz sand was used to improve oxygen supply during bioremediation. The oxygen-releasing rates of CaO₂ powder and OSRM with different SA contents were investigated. The efficacy of OSRM as an oxygen supplier was assessed by water remediation experiments using activated sludge. Results showed that CaO₂ powder was effectively embedded by SA under anhydrous conditions. The oxygen-releasing rate decreased with increasing SA contents. Moreover, the OSRM exhibited higher oxygen-releasing capacity, and more effective pH control ability than CaO₂ powder. The water remediation experiments showed better removal of COD and [Formula: see text] with OSRM as the oxygen supplier. These results provided detailed information when CaO₂ was applied as the oxygen supplier in water remediation, which can serve as references for field application of bioremediation.