Integration of filtration and liquid-solid process with MN100 resin for corn steep water purification

Corn steep water (CSW) is a secondary stream obtained from corn wet-milling industry that constitutes source of cost-competitive biocompounds. Among them, biosurfactants are one the most interesting due to important industrial applications and several advantages over commonly used chemical surfactants, such as lower toxicity, higher biodegradability better environmental compatibility (De et al., 2015). The aim this work study recovery CSW by sequential filtration liquid-solid extraction with an adsorbent resin Macronet MN100 (Purolite). effect pH (3, 5 7) well amount (0.5, 1 2 g) in biosurfactant were evaluated. For that, 10 mL at 50 g/L filtered removed solids put contact different amounts (pre-conditioned M HCl washed up during 24 h continuous rotatory agitation (70 rpm) room temperature. After period, phases separated, liquid fraction was analyzed surface tension measurements using Krüss K20 EasyDyne tensiometer 1.9 cm platinum Wilhelmy plate (Germany). resin, loaded biosurfactants, desorbed extractants: hot water, ethyl acetate methanol 5% NH3. Results showed significant increase values (from initial 54 65–72 mN/m), which means could entrap surface-active compounds CSW. Under conditions assayed, highest intermediate (1 close neutrality (5). Moreover, solution MeOH NH3 provided best results for desorption. In conclusion, integration resins, be strategy recover purify