Regeneration of Spent Caustic and Acidic Cleaning Baths Using a Pilot Membrane System

ANNA KOWALIK-KLIMCZAK, MACIEJ ZYCKI, PAULINA RAJEWSKA

Abstract


In this work, the concept based on using pressure driven membrane processes was developed to effectively recover alkaline and acidic cleaning baths that wash out of technological lines in dairy plants. As a result, the influence of both microfiltration (MF) and the integrated system of micro- and ultrafiltration (MF/UF) process parameters were assessed on the efficiency of the regeneration of alkaline cleaning baths. It was found that MF process allows reducing the level of contaminants in alkaline cleaning baths, yet the integrated MF/UF system is more efficient in the removal of high molecular organic compounds. In turn, during the regeneration of acidic cleaning baths, the influence of process parameters of ultrafiltration (UF) and integrated ultra- and nanofiltration systems (UF/NF) on the on their effectiveness was examined. As a result, it was confirmed that integrated UF/NF system is crucial to regenerate acidic cleaning baths.

Keywords


caustic and acidic cleaning baths, regeneration, microfiltration, ultrafiltration, nanofiltration.Text


DOI
10.12783/dtcse/fe2019/30697

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