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.