Medium effects on oxygen mass transfer in a plunging jet loop reactor witha downcomer

The rate of oxygen delivery determines, in many cases, the efficiency of ae robic processes used in wastewater treatment. In this work, a plunging jet loop system with a perforated downcomer was designed and operated to study oxygen transfer rate in aqueous solutions of glucose (1-4 wt.%) and a low f oam surfactant (0.037-0.074 wt.%). At normal temperature and pressure, K(L) a decreases with increasing the weight percent of glucose while it increase s with increasing the surfactant concentration. Simultaneous presence of gl ucose and surfactant in water was found to result in intermediate values of K(L)a. (C) 1999 Elsevier Science S.A. All rights reserved.