Rezaur Rahman

Document Type

Thesis - University Access Only

Award Date

2005

Degree Name

Master of Science (MS)

Department / School

Civil and Environmental Engineering

Abstract

This study concentrated on two common membrane concentrate disposal options direct surface water disposal and discharge into sewer. Mass balance evaluations were conducted to evaluate the feasibility of discharging membrane concentrate from hypothetical membrane water treatment facilities to several rivers. Feasibility was justified by compliance with the 30-day average TDS concentration imposed by surface water discharge permit requirements. The study showed that the systems located at Bon Homme-Yankton, Huron and Vermillion would be amenable to the direct disposal option. The mass balance analyses for the systems at Pierre, Sioux Falls, Rapid City and Yankton showed that these systems would be amenable to both the disposal options. For all these systems, the disposal options comply with the 30-day average limit imposed by EPA. Neither of the disposal options can be adopted for the systems at Watertown and Aberdeen. The disposal options for these systems show that the resulting down stream water quality does not comply with the 30 day average limit. Additional study would be necessary to assess the sewer disposal option at Brookings. The set up of new membrane plants will eventually remove all the home based water softeners from the water distribution system. Upon removal of these softeners, there will be less inflow of Na+ and Cr into the wastewater treatment plants and eventually the effluent water will contain a lower TDS concentration.

Library of Congress Subject Headings

Membranes (Technology)

Sewage disposal

Water treatment plants -- South Dakota

Water quality management -- South Dakota

Format

application/pdf

Number of Pages

173

Publisher

South Dakota State University

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