Moreover, the dose of rumen fluid used as inoculum of fermentation can be reduced without adverse effects on gas production. The residual fluids of fermentation residues can be reused as microbial inoculum at the condition that a complex (such as Menke) is used and the dose of microbial inoculum is reduced from conventional ml to about 5 ml. Results also showed that the citrus pulp and tomato peels are characterized by high fermentability and their complete degradation requires the use…