Membrane Ultrafiltration to Treat Non-Sanitary Military Wastes.

摘要

Ultrafiltration with non-cellulosic membranes is demonstrated to be a feasible process, from both engineering and health standpoints, for the treatment of laundry and shower wastes to enable the use of the recycled ultrafiltrate for non-potable, human contact purposes. Among the various non-cellulosic membranes evaluated, those containing charged groups in the anisotropic skin provide minimum flux drop and maximum rejection of solutes (including 40 to 60% rejection of dissolved solids). Extensive, laboratory-scale ultrafiltration data in a thin-channel unit for synthetic laundry wastes and for actual and synthetic shower wastes are utilized to establish optimum values of operational parameters and to determine empirical equations for ultrafiltrate water flux and ultrafiltrate water quality. The equations are used with a computer simulation procedure to establish the optimum multiple module arrangement (tapered mode), membrane area requirements, and predicted water quality at 90% water recovery for the full waste flow. A model of the entire waste treatment-water reuse system predicts the maximum build-up of organic carbon and total dissolved solids in the recycled water at a large number of recycle passes and the predictions are validated experimentally.