Method for converting biomass to methane

US8993288B2 · US · B2

Patent metadata
FieldValue
Publication numberUS-8993288-B2
Application numberUS-201314031758-A
CountryUS
Kind codeB2
Filing dateSep 19, 2013
Priority dateSep 24, 2010
Publication dateMar 31, 2015
Grant dateMar 31, 2015

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  2. Abstract

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Abstract

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A method for enhancing the treatment of lignocellulose-containing materials by biotreatment wherein such lignocellulose-containing materials, normally resistant to biotreatment, are first subjected to a low-temperature, long-residence time pyrolysis at about 175° C. to about 325° C. for about 0.1 hour to about 2.0 hours, wherein a substantial portion of the incoming material is distilled into water-soluble compounds amenable to anaerobic biotreatment. Exemplary applications of the method include pyrolytic pre-treatment of wastewater sludges, cellulosic wastes, wood, peat, plant residues, low-grade coal, and the like to enhance methane gas production in anaerobic digestion and/or oxygen-limited or oxygen-starved fermentation to produce ethanol.

First claim

Opening claim text (preview).

What is claimed is: 1. A method for converting a wastewater treatment sludge in a biotreatment process to produce a methanaceous fuel gas, comprising: treating said sludge by way of anaerobic biological treatment step to produce a methanaceous fuel gas and a dewatered solids stream; subjecting said dewatered solids stream to pyrolysis to produce (a) a pyroligneous liquid containing biotreatable liquid substances, (b) a pyrogas, and (c) pyrosolids including char; separating sai…

Assignees

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Classifications

  • Cross-Sectional Technologies · mapped topic

  • C12P7/08Primary

    Chemistry & Metallurgy · mapped topic

  • Cross-Sectional Technologies · mapped topic

  • Chemistry & Metallurgy · mapped topic

  • C12P7/14Primary

    Chemistry & Metallurgy · mapped topic

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What does patent US8993288B2 cover?
A method for enhancing the treatment of lignocellulose-containing materials by biotreatment wherein such lignocellulose-containing materials, normally resistant to biotreatment, are first subjected to a low-temperature, long-residence time pyrolysis at about 175° C. to about 325° C. for about 0.1 hour to about 2.0 hours, wherein a substantial portion of the incoming material is distilled into w…
Who is the assignee on this patent?
Anaergia Inc
What technology area does this patent fall under?
Primary CPC classification C12P7/08. Mapped technology areas include Chemistry & Metallurgy.
When was this patent published?
Publication date Tue Mar 31 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
What related patents are in patentsdb?
We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).