Volume 7 Issue 4
Jul.  2017
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Article Navigation >  Journal of Environmental Engineering Technology  > 2017  >  7(4): 477-482
LEI Yongkang, XIONG Chunjiang, JIANG Sujun, LIN Jianghai, LIU Zehuan. Pilot-scale study on food waste by combined processes of new-type breaking and squeezing pretreatment and consolidated bio-processing (CBP)[J]. Journal of Environmental Engineering Technology, 2017, 7(4): 477-482. doi: 10.3969/j.issn.1674-991X.2017.04.065
Citation: LEI Yongkang, XIONG Chunjiang, JIANG Sujun, LIN Jianghai, LIU Zehuan. Pilot-scale study on food waste by combined processes of new-type breaking and squeezing pretreatment and consolidated bio-processing (CBP)[J]. Journal of Environmental Engineering Technology, 2017, 7(4): 477-482. doi: 10.3969/j.issn.1674-991X.2017.04.065
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Pilot-scale study on food waste by combined processes of new-type breaking and squeezing pretreatment and consolidated bio-processing (CBP)

doi: 10.3969/j.issn.1674-991X.2017.04.065

  • Guangdong Qizhi Biotechology Co., Ltd., Guangzhou 510530, China

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  • Corresponding author: Zehuan LIU E-mail: zhliu@jnu.edu.cn
  • Received Date: 2017-01-03
  • Publish Date: 2017-07-20
    Abstract
  • The new-type breaking and squeezing equipment and combined oil-liquid-sludge separation technology with consolidated bio-processing (CBP) were used to study the effect on the reduction rate of food waste, the ethanol production, and the recovery of waste oil and high-protein vinasse. The results showed that: 1) the reduction rate of food waste reached above 90% and the low combustion value of dry slag attained 4 885 kJ/kg, reaching the national incineration standard. 2) In the salinity and acidic conditions, the sugar-alcohol conversion rate by yeast metabolic engineering bacteria was as high as 91.78% within 24 hours, which explained the bacteria had salt-tolerant and acid-resistance, and the high conversion efficiency from sugar to alcohol. 3) The recovery rate of waste oil and high-protein vinasse was 89.78% and 98.39%, respectively, and the product feature reached the high lipid standard of distillers dried grains with solubles (DDGS). The recovery rate of alcohol was 94.99%, and the product features reached the Class Ⅰ of national industrial alcohol standard. The consolidated bio-processing(CBP) had the advantage of high reduction rate, short fermentation period, and high recovery rate.

     

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