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<br />I--' <br />0') <br />1-' <br />CO <br /> <br />and by same means (electrodialysis or reverse osmosis) ~ut <br /> <br /> <br />without boron removal, except for 70 gpm used to meet <br /> <br />potable and domestic requirements. Cost of treatment <br /> <br />will range between SO. 75/1000 gal (= $240/acre-ft) and <br />6 <br />$0.95/1000 gal (= $310/acre-ft). or 0.7C/10 Btu to <br />6 <br />O. BC/10 Btu. <br /> <br />h) Retort Water for Internal Reuse <br /> <br />Quanti ty: <br />Qualitv: <br /> <br />Treatment: <br /> <br />1660 gpm (= 2670 acre-ft/yr). <br />Quality not determinable at this t~~e, but is assumed <br />to be a foul water with a high concentration of ~onia, <br />a BOD about 5,000 mg/l and a COD about 8,500 mg/1; <br />see Table 4-6. <br /> <br />~~ illustrative trea~ent is oil separation, followed by <br />ammonia stripping and acid gas removal, :ollowed by <br />oxygen activated sludge trea~ent. Treated water should <br />have a relatively low BOD, probably in the h~~dreds of <br />mgjl, a low level af ammonia and possibly a moderate level <br />of bicarbonate. Acidification or lime softening may also <br />be required in connection with use of the water for <br />evaporative COOling. T~e treatment cost is estimated at <br />. 6 <br />$2.8/1000 gal (= $910/acre-ft), or 2.2C/10 Btu, although <br />so little is known of ~~e retort water quality that this <br />figure ~ust be considered a crude estimat~ at best. <br /> <br />13 <br />