Abstract: The present disclosure relates to a process for producing a product based on faecals produced by animals, characterized in that faecals from mammals are wholly or partially dissolved using an oxidizing acid, solid acid-insoluble components are separated, if necessary, and the liquid component is neutralized with a base. Moreover, the invention relates to a plant for producing a product, the plant comprising a faecal reactor for receiving animal faecals, wherein the reactor is provided with means for supplying an oxidizing acid, possibly a separator unit for separating solid, acid-insoluble components, and a neutralizing reactor for neutralizing the part of the faecals dissolved by means of the oxidizing acid, wherein the neutralizing reactor is provided with means for supplying a base. The invention provides a substantially odorless product for use as fertilizer for a crop.

Abstract: A method of treating waste matter from animals, the method comprising: a) collecting waste matter from the animals; b) inhibiting urease activity in said collected waste matter; and c) separating said urease-activity inhibited waste matter into a urea-rich fraction and a urea-lean fraction; a system for treating waste matter from animals; a urea-lean biogas fuel product; a urea-rich animal waste-matter product; a method of controlling the content of nitrogen in manure from animals; a method of reducing gaseous ammonia in stables for animals; a stable for animals; a biogas reactor system for producing biogas from waste matter from animals; a method of producing urea from waste matter of animals; a method of producing urea formaldehyde; and a method of producing biogas fuel from waste matter of animals.