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Method and device for improving sludge biodegradability

A technology of biodegradability and sludge, applied in the direction of sludge treatment, biological sludge treatment, chemical instruments and methods, etc.

Pending Publication Date: 2021-08-06
OREGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] Therefore, in the case of mechanical lysis (lyse) techniques with local or chemical action (those described above and using ultrasound or chemical oxidation), the recommended maximum load is 6-8 g / liter MS, which inevitably leads to design Large size preparation equipment
[0014] For thermal hydrolysis technology, the optimal treatment starts with a concentration of about 20 g / l, all lower concentrations incur additional costs, which in turn brings about issues of space, homogenization and price

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  • Method and device for improving sludge biodegradability
  • Method and device for improving sludge biodegradability
  • Method and device for improving sludge biodegradability

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Embodiment Construction

[0082] figure 1 An apparatus for carrying out the method of increasing the biodegradability of sludge according to an embodiment of the invention described in more detail herein is schematically shown.

[0083] Starting from organic sludge 1 , for example, which is continuously pumped into a settling tank (not shown) and introduced into pipeline 2, a first hydrolyzed sludge is produced in a first zone 3 of this pipeline, called the reduction zone, by Emulsion: Gas 4 is injected into this narrowing zone by imparting a high velocity V1 (V1 ≥ 10 m / s) and advantageously V1 ≥ 20 m / s to the sludge emulsified in said zone.

[0084] The constriction zone 3 is thus a zone of low pressure P1 (eg P1≦0.5 bar, relatively) and high velocity, enabling an excellent gas / sludge mixture to be obtained.

[0085] The first emulsion is then introduced into a second zone 5 called the expansion zone or reactor, which has a larger volume, giving the first emulsion a low velocity V2 (≤ 1 m / s), but a h...

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Abstract

The invention relates to a method and a device for improving the biodegradability of an organic sludge. It comprises at least two treatment cycles each of a total duration of between around 8 s and around 20 s and each comprising a first step of producing a first hydrolysed sludge emulsion in a first, reduced zone, by injecting a gas into said reduced zone, a second step of abruptly expanding the emulsion in a second zone, namely the expansion zone; and a third step of recovering the emulsion via a third, restriction zone.

Description

technical field [0001] The present invention relates to a method for improving the biodegradability of organic liquid sludge. [0002] The term "organic sludge" refers to sludge containing at least 10% organic matter. [0003] The invention also relates to equipment for carrying out this method and to the intermediate products obtained. [0004] The invention can be applied with particular importance, but not exclusively, in the field of methanation, and more particularly for obtaining biogas suitable for being converted into heat, electricity and / or vehicle fuel. Background technique [0005] Sludge disintegration processes, eg used as pretreatment prior to anaerobic digestion, are known. [0006] The purpose of these techniques is to dissolve particulate organic matter and reduce the size of bacterial flocs. [0007] However, each of these mechanical or chemical techniques has disadvantages. [0008] In particular, they give insufficient performance due to oxidation re...

Claims

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Application Information

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IPC IPC(8): C02F1/34C02F1/20C02F1/24C02F1/56B01F5/10C02F11/04B01F5/04C02F11/123
CPCC02F1/20C02F1/24C02F1/34C02F1/56C02F11/04C02F11/123C02F2209/38C02F2209/40C02F2301/046C02F2301/066C02F2303/06B01F25/3142B01F25/53Y02E50/30B01F25/31241B01F23/803B01F25/51B01F23/2323B01F25/312533B01F25/31251B01F2101/305B01F2215/0422B01F2215/0468C02F11/00
Inventor P·卡波P·让德罗
Owner OREGE
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