method for the treatment of abfluessen from farbgebungs or painting

摘要

1,163,351. Purification of aqueous paint effluents by reverse osmosis. PRESSED STEEL FISHER Ltd. 6 March, 1968 [22 March, 1967], No. 13432/67. Heading B1X. Aqueous effluent containing paint pigments and resins is separated by reverse osmosis into two streams which are of low and high concentration, respectively, with respect to pigment and resin, the stream of low concentration being re-used in the painting plant or discharged to waste, and the stream of high concentration being pumped through a filter bank and then returned to the reverse osmosis unit. If desirable, the filtered stream may be submitted to treatment in a second reverse osmosis unit whence the stream of low concentration is returned to the painting plant or to first reverse osmosis unit, while the stream of higher concentration is pumped hack to the filter bank.