Effects of temperature, pH and D. O. concentration on settleability of activated sludge

Abstract

In this study, effects of temperature, pH and dissolved oxygen (DO) concentration of aeration basin on the settleability of activated sludge were investigated. Settleability was measured in terms of zone settling velocity and sludge volume index (SVI). Semicontinuous reactors were fed with synthetic wastewater. Five different temperatures, four different pH values and five different DO concentrations were operated in the aeration basin. It is believed that the information about the effects of these parameters on settleability of activated sludge are very important and must be seriously considered for the system efficiency and economy.