Method for ultra-dehydrating thickened or pasty biomass products, and equipment for implementing the method

Method for ultra-dehydrating thickened or pasty biomass products, and equipment for implementing the method

The invention relates to a method for ultra-dehydrating thickened or pasty biomass products, in particular sludge from wastewater treatment plants, according to which the products, in particular products having a dryness of 4 % to 25 %, are subjected to the following steps: hydrothermal carbonisatio...

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Hauptverfasser: Pardo, Pierre Emmanuel, Judenne, Eric
Format: Patent
Sprache:eng
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CHEMISTRY
METALLURGY
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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creator Pardo, Pierre Emmanuel
Judenne, Eric
description The invention relates to a method for ultra-dehydrating thickened or pasty biomass products, in particular sludge from wastewater treatment plants, according to which the products, in particular products having a dryness of 4 % to 25 %, are subjected to the following steps: hydrothermal carbonisation treatment, including pressurization (1, 2) and thermal conditioning (30) for a duration in a closed reactor (4); followed by dehydration of the products by a ram press (12), obtaining a dryness of more than 50 %; the temperature of the product upstream from the ram press dehydration being regulated by cooling between 40 °C and 90 °C, advantageously to around 70 °C, in order to optimise the filterability in the piston press; the steps of the method being performed in a confined space making it possible to prevent the release of smells into the atmosphere.
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subjects CHEMISTRY
METALLURGY
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
title Method for ultra-dehydrating thickened or pasty biomass products, and equipment for implementing the method
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