Author(s)

M Zessner, B. Vogel & H. Kroiss

Abstract

Requirements for design and operation of sewage treatment plants with infiltration of effluents into groundwater M. Zessner, B. Vogel & H. Kroiss Institute for Water Quality and Waste Management, Vienna University of Technology, Vienna, Austria Abstract Infiltration of treated wastewater into the subsurface zone is taken into consideration if (i) a receiving surface water is missing or if (ii) water scarcity characterises a region. Within this paper results from investigations performed at three wastewater treatment plants which infiltrate their effluents into their surrounding soil aquifer systems, are presented. Based on a comparison of the investigated wastewater treatment facilities and their effects on the groundwater system, requirements for design and operation of sewage treatment plants in respect to groundwater protection in similar cases are presented: (i) Treatment plants have to be designed with nitrificatioddenitrification, advanced TOCremoval and, depending on the size of the pla

Keywords