Journal
SEPARATION AND PURIFICATION TECHNOLOGY
Volume 209, Issue -, Pages 26-31Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.seppur.2018.07.012
Keywords
2G-lactic acid; Downstream; Hybrid short path evaporation; Hemicellulose sugars
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Funding
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo-FAPESP [2013/26290-5]
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Production of lactic acid (LA) from lignocellulosic materials has become increasingly prominent in the market. However, for industrial scale to be reached, several challenges in second-generation lactic acid production must be overcome. Besides obstacles such as the hydrolysis process, one of the major challenges of the lactic acid industry is the separation and purification process. This study evaluates the separation of lactic acid produced from hemicellulose hydrolysate from sugarcane bagasse using a Hybrid Short Path Evaporation (HSPE) system. Results showed that a lactic acid concentration of 3.1 times the feed concentration (27.85 g/L) is achievable. Three operational parameters were studied: evaporator temperature, internal condenser temperature and feed flow rate. Maximum lactic acid concentration was 86.69 g/L with an evaporator temperature of 120 degrees C, condenser temperature of 13 degrees C, and feed flow rate of 8.27mL/min. Separation of LA from hemicellulosic sugars using HSPE was a more difficult process than separation of LA from 6-carbon sugars.
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