Method for manufacture of sanitised organic sludge

C - Chemistry – Metallurgy – 05 – F

Patent

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Details

C05F 17/00 (2006.01) C02F 11/02 (2006.01) C05F 1/00 (2006.01) C05F 7/00 (2006.01)

Patent

CA 2625253

It is described a method for manufacture of sanitised organic sludge, said method comprising the following steps: mechanical mixing of a cellulose containing component, a super absorbent and dewatered organic sludge; leading the mixture to a sanitising container; continuously supplying air to the sludge mixture until the desired temperature has been reached. The super absorbent increases the moisture retention of the sludge mixture, such that odour and leakage is prevented during composting. The cellulose component, preferably shredded newspaper, admits increased air supply to the sludge mixture. The method may be used to treat sewage sludge, hydrocarbon polluted soil and waste from fish processing or abattoirs.

L'invention concerne un procédé de fabrication d'une boue organique assainie, ledit procédé comprenant les étapes suivantes: mélanger mécaniquement un composant cellulosique, un superabsorbant et une boue organique essorée, amener le mélange dans un récipient d'assainissement et délivrer en continu de l'air dans le mélange de boue jusqu'à ce que la température souhaitée ait été atteinte. Le superabsorbant augmente la quantité d'humidité retenue par le mélange de boue de manière à empêcher la libération d'odeurs et des fuites pendant le compostage. Le composant cellulosique, de préférence des journaux déchiquetés, permet d'injecter davantage d'air dans le mélange de boue. Le procédé peut être utilisé pour traiter de la boue de station d'épuration, des terres polluées par des hydrocarbures et des déchets qui proviennent du traitement des poissons ou d'abattoirs.

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