A novel sintered metal fiber microfiltration of bio-ethanol fermentation broth

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• 作者：Qian Kang ; Jan Baeyens ; Tianwei Tan ; Raf Dewil
• 关键词：Bioethanol ; Microfiltration ; Sintered Metal Fleece ; Models
• 刊名：Korean Journal of Chemical Engineering
• 出版年：2015
• 出版时间：August 2015
• 年：2015
• 卷：32
• 期：8
• 页码：1625-1633
• 全文大小：567 KB
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• 作者单位：Qian Kang (1) (2)
  Jan Baeyens (2)
  Tianwei Tan (2)
  Raf Dewil (1)
  
  1. Department Chemical Engineering, Process and Environmental Technology Lab., KU Leuven, Sint-Katelijne-Waver, Belgium
  2. School of Life Science and Biotechnology, Beijing University of Chemical Technology, Beijing, China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Industrial Chemistry and Chemical Engineering
  Catalysis
  Materials Science
  Biotechnology
  
• 出版者：Springer New York
• ISSN：1975-7220

文摘

In bio-ethanol fermentation, the broth consists of mainly water and ethanol, together with particulate residues of unreacted feedstock and additives (mostly yeast). Prior to further processing (distillation), and to avoid fouling of heat exchangers and distillation columns, the solids residues of the broth need to be removed to as low a concentration as possible. The current mechanical separation (belt filter or centrifuge) can only remove +10 μm particles representing about 90% of the total solids content. The remaining 10% is usually recovered in the bottom stream of the first distillation column, and forms the stillage that is further treated. To avoid fouling and even eliminate the first distillation column where the ethanol fraction is only increased from 12% (feed) to 16% (top), a better particulate removal is required. Novel sintered metal fiber (SFM) fleeces are highly efficient for microfiltration, and the removal of suspended solids largely exceeds 99%. The paper (i) positions microfiltration in the overall bio ethanol process; (ii) describes the novel sintered metal fiber microfiltration application; (iii) experimentally determines the major operating characteristics of SFM and (iv) predicts the up-scaled operation by using a simplified filtration model. At an ambient feed temperature, the flux of permeate exceeds 5m3/m2h for a TMP of 1.5 bar and a yeast concentration of 15 g/l, as commonly encountered in the fermenter broth.