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Method for anaerobic sludge digestion and a digester

An anaerobic digestion and digester technology, applied in chemical instruments and methods, biochemical equipment and methods, biochemical instruments, etc., can solve the problems of weakened digester effectiveness

Inactive Publication Date: 2007-11-28
ЭРГАЛЬЯ
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the effectiveness of this digester is greatly impaired

Method used

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  • Method for anaerobic sludge digestion and a digester
  • Method for anaerobic sludge digestion and a digester
  • Method for anaerobic sludge digestion and a digester

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Embodiment Construction

[0029] Referring first to Figures 1 and 2, there is shown a digester 200 according to the present invention for treating primary sludge (raw sludge) containing sewage. Sludge originates from the pretreatment of effluents, for example from sedimentation processes.

[0030] The digester 200 comprises a tank 201 having an axis 202 which is used herein to define the term "longitudinal". The following description is directed to the can body 201 having a generally cylindrical overall shape. However, the tank may also have a substantially rectangular vertical section, thus providing a very wide tank (in the horizontal plane) while keeping the weight low.

[0031] The tank 201 is sealed except for the three main openings and one or more detection valves, as described below, for eg ensuring the presence of oxygen in order to enable methane fermentation. The tank 201 has a relatively small height (comparable to the diameter of a cylinder) of between 50 and 70 mm, and a length of 2 to ...

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Abstract

The method of the invention is used to introduce primary sludge having a dry matter concentration of less than 40 g / l into the upstream part of the digester (200) where a thin layer of sludge is maintained in the digester allowing a substantially horizontal circulation of the sewage to the sewage. On and in the mud, and the sewage is discharged from the digester with the soluble matter produced by the digestion of the sludge. The tank (201) of the digester is divided into a plurality of chambers (218a-218d) for the flow of sewage by transverse walls provided with communication openings (216) in their lower parts.

Description

technical field [0001] The present invention relates to a method for anaerobic digestion of sludge (sludge) produced when treating sewage discharges, an anaerobic digester for primary sludge containing sewage, and a process mainly comprising such a digester equipment. Background technique [0002] Anaerobic digestion of effluents from eg domestic sewage mainly consists of hydrolysis and methane fermentation with considerable granule destruction dynamics in order to be able to remove the large amount of organic material contained in the sludge. [0003] As an example, sludge originates from the sedimentation of raw sewage discharges. At the outlet of the digester, digested sludge can be obtained on the one hand, and sewage can be obtained simultaneously on the other hand, and these two parts can undergo various additional treatments respectively. [0004] Document US 6673243 proposes an anaerobic digester for sludge comprising a tank divided into a number of successive cham...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/04C02F3/00
CPCC12M21/04C12M23/06C02F2003/008C02F11/04C12M27/20
Inventor 埃尔韦·菲利普西格弗里德·莫努瓦
Owner ЭРГАЛЬЯ