Method for treating ammonia-containing organic waste

Details Method for treating ammonia-containing organic waste Method for treating ammonia-containing organic waste

C - Chemistry, Metallurgy

05

F

C05F 3/00 (2006.01) C05D 3/02 (2006.01) C05F 5/00 (2006.01) C05F 7/00 (2006.01)

Patent

CA 2417933

A method is described for treating animal manures and other organic wastes to destroy pathogens, reduce noxious odors, and immobilize water-soluble pollutants, thereby producing a pasteurized, granular product useful as a soil amendment. In a described implementation, the solids content of the organic waste is raised to a predetermined level to create air-filled pore space, and the pH is raised sufficiently to liberate endogenous gaseous ammonia in the air-filled pores for a predetermined time. The level of gaseous ammonia is sufficient to significantly destroy pathogens in the manure. In addition, alkaline material and/or iron salts are added to the organic waste to render certain water-soluble pollutants insoluble.

Cette invention concerne un procédé de traitement de déjections animales et autres déchets organiques destiné à détruire les agents pathogènes, à réduire les odeurs délétères et à immobiliser des polluants solubles dans l'eau, l'objectif étant de produire un produit granulaire pasteurisé utile pour l'amendement des sols. Selon un mode de mise en oeuvre, on porte la teneur en solides de déchets organiques à un niveau déterminé de manière à créer un espace poreux rempli d'air et l'on augmente suffisamment le pH pour libérer de l'ammoniac gazeux endogène dans les pores remplis d'air pendant un laps de temps déterminé. Le niveau d'ammoniac gazeux est suffisant pour détruire sensiblement les agents pathogènes présents dans les déjections. De plus, on ajoute une substance alcaline et/ou des sels de fer aux déchets organiques pour rendre insolubles certains polluants hydrosolubles.

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