Evaluation of advanced treatment methods for wastewater reuse-A case study on organized industrial districts from Turkey

Abstract

In this chapter, the effluents originating from an Organized Industrial District (OID) wastewater treatment plant for possible reuse in textile industry as process water was investigated. Wastewater samples were taken from an OID where most of industries consist of textile producers having mainly dying and finishing processes. Advanced treatment methods including fenton process, chemical precipitation, neutralization and ion exchange were applied to the samples in the lab conditions. In fenton process removal efficiencies for total suspended solids (TSS), chemical oxygen demand (COD), spectral absorption coefficient (SAC<inf>436</inf>, SAC<inf>525</inf> and SAC<inf>620</inf>) were determined 65%, 58%, 48%, 60% and 74%, respectively. Ca(OH)<inf>2</inf> at pH 11 has provided the maximum removal efficiency in chemical precipitation experiments. Optimum removal efficiencies for SS, COD, Fe ion were determined 80%, 38% and 96% respectively. After fenton process and chemical precipitation, ion exchange experiments were conducted to improve the quality of wastewater. Optimum dosage of resins was determined. The amounts of dry resins packed in the columns were determined using three different ratios of 20:10, 20:20, 10:20 (g weight ratio). The experiments revealed that 1:1 resin ratio (20mL H-type resin:20mL OH-type resin) gave the best removal rates for the parameters considered in this study. Results indicated that the quality of the treated wastewater reached the suggested process water limits of the textile industry. © 2011 by Nova Science Publishers, Inc. All rights reserved.