In order to develop an optimal composting process, it is very importantthat the raw materials are suitable for composting and there should have a correct proportion in the mixture of different structures and type offibres, size of particles, adequate percentage of water, natural ferments,etc. In addition, the volume and aeration are decisive parameters for the correct formation of the compost.

The minimum volume should be a 1m2. The dimensions of the compostershould be of minimum 50 cm and maximum 150 cm for side, and amaximum height of 160 cm. The pH must be maintained between 6 and 7; and the temperature also should be maintained between 35 and 65 ºC.The composting time depends on many factors and it can take from 1 to 6 months.

The composter can be made of different materials: recycled pallets,wooden box, waste bins, plastic containers.

To elaborate compost is necessary:

• Vegetable materials, Waste from cleaning grain, Crop residues…
• Water (humidity)
• Air: a good oxygenation is needed