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Method for treating waste, in particular household refuse, and unit for implementing same

A technology for waste treatment and domestic waste, applied in the field of waste

Active Publication Date: 2015-01-14
SUEZ ENVIRONNEMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of method has the main disadvantage of separating the pollutants or reusable materials (glass, plastic, fabric...), which often causes difficulties in sorting and a strong risk of fertilizer contamination and requires relative Very large-sized devices in terms of demand

Method used

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  • Method for treating waste, in particular household refuse, and unit for implementing same
  • Method for treating waste, in particular household refuse, and unit for implementing same

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0070] The object of the invention is to obtain:

[0071] - the quality of the homogeneous organic components after passing in the pre-fermentation treatment rotating tube body 1 ( figure 1 ) and the possible exclusion of undesired substances after sieving,

[0072] - and a biogas production optimized with respect to the dimensioning of the digester 2 used.

[0073] The present invention also aims to provide a digestate with a high dry matter content, to enable the optional pressing prior to aerobic slaking, without damaging the digestate, and to provide a digester that complies with the standards applied in the countries involved by the method. fertilizer.

[0074] The term "digester" denotes the product exiting the digester, consisting of organic matter after anaerobic digestion.

[0075] It is evident that the quality level of the material exiting the pre-fermentation rotor is not constant. It can be determined that the irregular feeding of the material over time, in pa...

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PUM

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Abstract

The invention relates to a waste treatment method in which waste is subjected to a first screening process (4). The fraction of waste passing through the screening is subjected to a pre-fermentation treatment in a rotating tube (1) and the material leaving the pre-fermentation treatment tube is subjected to mixing in a mixing hopper, and, subsequently, to a methanisation treatment in a digester (2). The organic materials are separated from the undesirable products in the material leaving the pre-fermentation treatment tube before it enters the digester. The digester (2) is horizontal and mechanically stirred, and a fraction of the digestate leaving the digester is recirculated at least in the mixing hopper, the recirculation rate being sufficiently high to ensure complete mixing.

Description

technical field [0001] The invention relates to a process for the treatment of waste materials, in particular domestic waste, containing mixed organic matter with undesirable substances, in particular metals, minerals, plastics, glass, the type of which is, according to the method: [0002] - The waste material undergoes a first screening sorting, [0003] - The waste fractions subjected to this sieving undergo pre-fermentation in a rotating tube fed at one end and discharged at the other end, [0004] - and the material exiting the rotating tube of the pre-fermentation process undergoes mixing in the mixing hopper and then undergoes methanation in the digester. Background technique [0005] Household waste from non-selective recycling contains different kinds of materials such as putrescible waste (food waste, green waste), paper, cardboard, glass, plastic, ferrous or non-ferrous metals, fabrics, sanitary textiles, toxic products ( batteries, paint cans...). [0006] Me...

Claims

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Application Information

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IPC IPC(8): B03B9/06
CPCB03B9/06C05F9/00C05F17/50Y02E50/30Y02W30/40Y02P20/145Y02A40/20
Inventor A·索曼
Owner SUEZ ENVIRONNEMENT