MEMBRANE TECHNOLOGIES FOR ULTRA-CLEAN WATER PREPARATION

Pri proizvodnji elektrike, v industriji elektronike ter farmaciji se pogosto uporablja ultra Äista voda. To je filtrirana voda, ki vsebuje zelo malo kemijskih primesi ostalih elementov – je skoraj kemiÄno Äista voda. Za pripravo ultra Äiste vode se uporabljajo membranske tehnologije, kot so mikrofiltracija, ultrafiltracija, reverzna osmoza ter v zadnjem Äasu elektrodeionizacija, ki zamenjuje trenutno uveljavljeno tehnologijo odstranjevanja ionov z ionsko izmenjevalnimi smolami. V eksperimentalnem delu sem opravil meritve na EDI modulu. Glede na podatke sem izraÄunal masni koeficient prenosa ter Sherwoovodo Å¡tevilo ter ga primerjal s teoretiÄnim.Ultra clean water is most commonly used in power industry, microelectronic and pharmacy. Ultra clean water is filtrated water with very little other chemical elements – almost chemical pure water. For ultra clean water preparation, we use membrane technologies such as microfiltration, ultrafiltration, reverse osmoses and lately, electrodeionization, which replaces commonly used technology of removing ions with ion exchange resins. For experimental work, process parameters of EDI module had been measured. According on gathered information\u27s, mass transfer coefficient and Sherwood number has been calculated and compared with theoretic values