(401bd) Recovery of Lactic Acid from the Pretreated Fermentation Broth Based on a Novel Hyper-Cross-Linked Meso-Micropore Resin
AIChE Annual Meeting
2017
2017 Annual Meeting
Separations Division
Poster Session: Separations Division
Tuesday, October 31, 2017 - 3:15pm to 4:45pm
In this work, an innovative benign process for recovery lactic acid from its fermentation broth is proposed using a novel hyper-cross-linked meso-micropore resin. No environmentally harmful wastes are produced in this process, since deionized water (eluent) is the only substance added to the separation process. This work focuses on modeling the competitive adsorption behaviors of glucose, lactic acid and acetic acid ternary mixture and explosion of the adsorption mechanism. The characterization results showed the resin had a large BET surface area and specific pore structure with hydrophobic properties. By analysis of the physicochemical properties of the solutes and the resin, the mechanism of the separation is proposed as hydrophobic effect and size exclusion. Subsequently three chromatographic models, i.e., GR (General Rate Model), TDM (Transport Dispersive Model) and LDF (Linear Driving Force) models were applied to predict the competitive breakthrough curves of the ternary mixture under different operating conditions. The pore diffusion was the major limiting factor for the adsorption process, which was consistent with the BET results. In the end of this work, the selected model (TDM) was validated by comparison of the chromatographic peaks of the ternary-mixture with pretreated real fermentation broth used as a feed solution. According to this work and comparison with other literature, the novel HD-06 resin can be a good potential adsorbent for the future SMB continuous separation process.