Nanofiltration process monitoring and antioxidant activity analysis of skimmed milk samples

Dead-end stirred cell experiments were performed with reconstituted skimmed milk and model solutions of single components (lactic acid). When a low solids concentration is presented the feed, dead-end filtration selected polymeric membrane cut-off 300 Da viable option to assure high rejection dissolved organic compounds (> 90%), combined good transport at moderate pressures (20 bar) an average flux increasing from 48 Lh−1m−2 room temperature over 67 L h−1m−2 50°C until reaching volume reduction about 5. The DPPH antioxidant activity was effectively improved (~3 fold) some loss due fouling, transmission low-molecular weight in permeates spite process, whilst latter have astoundingly capacity, so each permeate can be divided into time intervals permeation per sample aliquotes different activity. That further confirmed statistical analysis where р > 0.05. As conclusion, because up significantly increases without much effect on activity, such temperatures, dilution conditions are for large-scale production uses.