| 摘要 |
The invention relates to a process and apparatus for the utilization of raw diluted dung water (Gülle), in which the diluted dung water is heat-treated by heating it to at least 80 DEG C, then cooling it to 40 to 30 DEG C in a heat exchanger 6, a precursor culture medium is prepared from the heat- treated diluted dung water, biomaterial(s) and/or from at least one nitrogen-containing inorganic salt and/or from water-soluble vitamin(s); a lower alcohol as well as rotted sludge containing organic impurity, derived mainly in the course of urban sewage treatment, as well as optionally heat-treated diluted dung water are then added to the culture medium and by fermentation of the mixture inoculum is produced; the inoculum, as well as lower alcohol and optionally culture medium, are mixed with the heat-treated diluted dung water, and the mixture is fermented at 26 to 38 DEG C and biomass is separated from the ferment juice derived in the course of fementation. |
