Effect of Wet-Air Oxidation on the Chemical Composition of Sewage Sludges.

摘要

Sewage sludge samples were obtained from waste streams in two sewage treatment plants before and after wet-air oxidation. Wet-air oxidation resulted in a 10-20% reduction in volatile solids. Concurrently,total N levels in the sludges decreased by >50% while P,Cu,Zn,Ni,Cd and Pb concentrations either increased or remained unchanged. From the standpoint of applying sewage sludge to agricultural land,inclusion of a wet-air oxidation unit in a treatment plant will decrease the desirability of utilizing sewage sludge as a fertilizer material.