RESULTS OF PILOT TESTS OF THE VSEP TECHNOLOGY ON THE EXAMPLE OF PURIFICATION OF CONTAMINATED ACID WASHING WATERS BY NANOFILTRATION

Shown are the results of a series of pilot tests for the purifi cation of waste (contaminated) acidic wash water formed during the production of graphite by the leaching method. The tests were carried out in laboratory and pilot modes (on-site) on the “LP” series machine. Purifi cation was simulated using nanofi ltration membranes using VSEP technology. This technology of vibro- membrane fi ltration makes it possible to purify such waters without preliminary purifi cation and the use of reagents (antiscalant) with a %Recovery more than 90 %. The mechanism for choosing the optimal sheet polymer membrane and the mechanism for determining the best working pressure are shown. Concentration series were carried out to determine the stability of the process and the duration of the fl ushing interval. The test results allow the design of an industrial water purifi cation system.