By Tina L. Arrowood, Principal Research Scientist, DuPont Water Solutions, USA and Mahesh Kulkarni, Technical Service and Development Scientist, DuPont Water Solutions, India EXTENDED ABSTRACT For maximizing wastewater reuse and preventing wastewater discharge, zero-liquid discharge (ZLD) is acknowledged for its benefits in protecting fresh surface waters. Unfortunately, it is typically determined to be too expensive to be practical. A more realistic and cost-effective method is a hybrid approach of minimal-liquid discharge (MLD), using reverse osmosis (RO) membranes, to minimize the volume of wastewater prior to thermal ZLD treatment. To comply…
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