Optimisation of a pulp treatment method
AssigneeSuez International
InventorsPierre Emmanuel PARDO, Hugues VANDEN BOSSCHE
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Abstract
Disclosed is a method for treating pulp, particularly a method for treating sludge from wastewater treatment plants, for producing energy and/or organic materials that have undergone hygienization, including at least the following steps: a step of aerated or non-aerated thermal hydrolysis of the pulp, a digestion step, a dehydration step and a step of recirculating part of the dehydrated pulp into the step of thermal hydrolysis.
Claims20
A method for treating pulp, in particular a method for treating purification plant sludge, for producing energy and/or organic matter that has been rendered hygienic, comprising
- i. a step of aerated or non-aerated thermal hydrolysis of the pulp,
- ii. optionally a step of dilution of the pulp hydrolyzed in step i),
- iii. a digestion step of mesophilic or thermophilic type either of the pulp hydrolyzed in step i), or of the pulp hydrolyzed and diluted in step ii),
- iv. a step of dehydration of the pulp resulting from the step iii) and
- v. a step of recirculation of part of the dehydrated pulp resulting from step iv) to the thermal hydrolysis step i).
Dependencies are inferred from the claim text.