To enhance biogas production and identify new additive materials for the co-digestion of wheat straw,
sheep manure, and chicken manure, batch experiments were investigated in this study. Experiments
were conducted on the influence of additive materials on a range of manure/straw ratios (3:7, 5:5, and
7:3) and biogas production under a mesophilic temperature (35 C). Results showed that the maximum
increments of methane production (L/kg VSadd) with the addition of 3 g magnetite and 1 g natural zeolite
were 52.01% and 51.01%, respectively. The addition of magnetite and zeolite in the anaerobic digestion
process produced a good fermentation environment. By using the response optimizer when the
manure proportion was 52%, the best methane yield was obtained with the addition of 2.7 g magnetite.
For zeolite, the best addition dose was 1 g and the optimum manure proportion is 63%. Magnetite had a
more extensive increase in methane yield than zeolite.
To enhance biogas production and identify new additive materials for the co-digestion of wheat straw,sheep manure, and chicken manure, batch experiments were investigated in this study. Experimentswere conducted on the influence of additive materials on a range of manure/straw ratios (3:7, 5:5, and7:3) and biogas production under a mesophilic temperature (35 C). Results showed that the maximumincrements of methane production (L/kg VSadd) with the addition of 3 g magnetite and 1 g natural zeolitewere 52.01% and 51.01%, respectively. The addition of magnetite and zeolite in the anaerobic digestionprocess produced a good fermentation environment. By using the response optimizer when themanure proportion was 52%, the best methane yield was obtained with the addition of 2.7 g magnetite.For zeolite, the best addition dose was 1 g and the optimum manure proportion is 63%. Magnetite had amore extensive increase in methane yield than zeolite.
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