NANO SEPARATION METHOD OF SALINE WATER FROM KIMCHI SALTING PROCESS

摘要

PURPOSE: A nano separation method of saline water is provided to eliminate color, bad smell, and bacteria of waste saline water using an optimized collecting process using a NF(Nano Filtration) membrane, to maximize salinity recovery rate, and to extend the lifetime of the membrane through the process for cleaning the membrane. CONSTITUTION: A nano separation method of saline water comprises the following steps: a step(S1) transferring waste saline water to a raw water tank after storing the waste saline water in a waste saline water tank and transferring raw water to a preprocessing unit using a feed pump; a step(S2) filtering pollutant particles of the raw water using the preprocessing unit; a step transferring the waste saline water to a membrane unit using a high pressure pump; a step(S3) separating the waste saline water into processing water without pollutants and concentrated water thorough the membrane unit having a molecular weight of 100-900Da; a step(S4) leaking the processing water and circulating the concentrated water again to the raw water tank; a step(S5) supplying the waste saline water of same amount as efflux to the raw water tank; and a step(S6) eliminating contaminant of the NF membrane surface by supplying heated cleaning water to the feed pump.