Therefore, when the absorption device is fully filled, the unit body is movably detached to replace the absorption device so as to be favorable for repeated replacement and use.

To face the body is the creation of space, after determining the morphology and thickness of the surface front unit body, a plurality of unit surface assembled to the uniform space.

The insects generally produced less methane, nitrous oxide and ammonia both per unit of body mass and per unit of mass gained than pigs or cattle.