A Study on the Comprehensive Utilization of Maize Alcohol Lees Liquid

The comprehensive utilization of maize alcohol Jees liquid is discussed in this paper. By separating the lees liquid, solid lees can be obtained and used as feedstuff. Biogas can be produced by fermenting the waste liquid, which contained high concentration of suspended solid and high concentration of organic matter. The waste liquid is fermented in a fermenting tank, which combined an upflow filter and an anaerobic sludge bed together(UFASB) . After fermenting, the liquid is treated by a tertiary oxidation pond so as to be used to irrigate fruit trees. By irrigating, the soil nutrient is increased and the trees are protected from aphides. Biogas is used for cooking or generating electricity. The study shows that the treatment of the waste liquid by UFASB has achieved good results, and the fermenting system had a normal working state in winter under good heat preservation. It is clear that the lees liquid could be multi-level utilized in the whole system.