Effect of Integrated Ethanol-Methane Fermentation Process on Dried Distillers' Grains

Abstract:

The integrated ethanol-methane fermentation process can efficiently resolve the problems of massive energy consumption and high cost for wastewater treatment faced by corn ethanol production process. In this paper，effect of the integrated process on the quality of the dried distillers' grains（DDG）was studied. Results showed that DDG obtained from the integrated process contained higher concentration of protein and amino acid and lower concentration of inorganic salt，thereby having higher nutritional value compared with the conventional dry-grind process. Electronic nose and GC/MS were used to analyze the odor of the DDG，and it was found that DDG of the recycling batches showed some different with the first batch of DDG. However，feed intake of domestic animals was not influenced.