Different Substrates At Low Temperature Anaerobic Fermentation Of Gas Test

Use of different fermentation substrates, addition of activated sludge, adding different percentage of straw, select Northwest Nationalities University Yuzhong Campus anaerobic wastewater treatment plant sludge and isolated from the feces of the Tibetan wild ass and cellulosic bacteria as activated sludge inoculum, to simulate seasonal changes and winter low temperature fermentation. The results are as follows:Anaerobic fermentation process, the optimal fermentation temperature is 35℃, simulation from summer to autumn (the temperature dropped from 25℃, 35℃) gas plunged about half of simulation to the winter to summer gas sag 1 / 4. In summer, the normal temperature of other conditions, gas production up sheep, followed by chicken manure, cow dung second, and pig manure at least. Addition of activated sludge to 20%, add the ratio of 4:1 straw manure, gas to peak, the cumulative gas production, the average daily gas production was the highest.In the case of low winter temperature, after treatment by activated sludge acclimated inoculum, sheep, pig gas production decreased significantly, cow dung, chicken manure gas production increased significantly. Addition of activated sludge gas production increased 10% significant; addition of 15% and 20%, the difference was not significant. Add a proportion of straw manure significantly different in the 5:1, the rest are not significant.In short, the isolated bacteria were significantly increased in the winter of anaerobic fermentation of cow dung methane production, saving the amount of activated sludge, obtained under different fermentation conditions the best substrate to add, improve the fermentation efficiency, the North the normal use of biogas digesters in winter has helped.