Separation of Oil in Bilge Water by Semipermeable Membrane.
Research and development rept.,
NAVAL SHIP RESEARCH AND DEVELOPMENT LAB ANNAPOLIS MD
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The oil-separation characteristics of cellulose-acetate membranes were experimentally analyzed with a bench-scale apparatus. Experiments were initially conducted on distilled water solutions to determine permeate product water flux rate through the membrane as a function of operating time when the feedwater contained minimal impurities. A group of membrane separation experiments were then carried out with distilled water and 1 2190-TEP lubricating oil. For the oil-water tests, the change in permeate flow rate with time and the oil concentration of the permeate, the feedwater, and the waste water were measured. The results of the oil-water tests showed that the oil concentration could be reduced from 10,000 to less than 25 parts per million in a single pass through the membrane. The primary difficulty was a gradual decrease in permeate flux rate that resulted from the membrane becoming coated with an oil film.
- Industrial Chemistry and Chemical Processing
- Water Pollution and Control