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Abstract

The objective is to obtain a solid biofuel that comprises lignin from cattle, goat and pig manure that complies with the ISO 17225-6 standard both in terms of energy and environment and a method for obtaining it. The method is mainly based on the separation of contaminants from lignin. This is achieved by the following steps: treatment of manure in a wash pond by feeding the system to a wash pond; washing the manure in the washing pond by means of rotary movements and ultrasound and dragging by water; adding a continuous flow of clean water into the wash tank; separation of liquids and solids; pressing for the elimination of excess water from the solid biofuel without drying and finally drying it. Despite the fact that there are similar processes with the objective of obtaining a biofuel from manure, the novelty consists in that it is not combined with other products such as sawdust or straw; nor is there a need to incorporate chemical processes, nor is it subjected to thermal processes or carbonization. This biofuel also can not be compacted or pelletized for commercialization. Cattle manure has been used as a fuel source since ancient times by mankind. The accumulation of manure as well as its burning, however, presents a series of inconveniences and dangers for human health, among them, bad smell derived from its decomposition, bad odor, generation of corrosive substances and toxic gases when burned, along with the generation of substances that stain and dirty the facades and interiors of homes and buildings.

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