SUPERCRITICAL WATER OXIDATION OF ANALGIN PHARMACEUTICAL WASTEWATER.

In this paper, supercritical water oxidation (SCWO) is applied to treat analgin pharmaceutical wastewater. The results show that temperature, residence time and oxidant excess (OE) can improve XCOD (COD removal). The OE and residence time markedly influences XCOD at higher reaction temperatures (>510°C). Increasing the preheating rate for the XCOD improvement in SCWO is significant. XCOD and XTN (total nitrogen removal) are 99.53 and 87.81%. More than 93.1 wt.% total organic carbon (TOC) and 87.81 wt.% total nitrogen in the analgin pharmaceutical wastewater are converted into CO2 and N2 under the above conditions, respectively. [ABSTRACT FROM AUTHOR]