Method for treating waste

Patent metadata

Field	Value
Publication number	US-10427193-B2
Application number	US-201615569872-A
Country	US
Kind code	B2
Filing date	Apr 8, 2016
Priority date	Apr 30, 2015
Publication date	Oct 1, 2019
Grant date	Oct 1, 2019

Abstract

In a method for treating waste, in particular domestic waste, comprising the providing of a closed building for receiving the waste, the roof of the building being designed as a semi-permeable membrane, the filling of the building with the waste, the waste being piled into a mound, the performing of a biological drying of the waste with the supply of air, the air exhaust taking place through the semi-permeable membrane, and the discharging of the dried waste from the building, the filling of the building and the performing of the biological drying, and optionally discharging, of the waste are carried out with an unchanged arrangement of the roof, and the filling of the building is carried out by dropping the waste from a continuous conveying device.

First claim

The invention claimed is:

1. A method for treating waste, in particular domestic waste, comprising the providing of a closed building for receiving the waste, the roof of the building being designed as a gas- and vapor-permeable, yet water-tight membrane, the filling of the building with the waste, the waste being piled into a mound, the performing of a biological drying of the waste with the supply of air, the air exhaust taking place through the gas- and vapor-permeable, yet water-tight membrane, and the discharging of the dried waste from the building, characterized in that the filling of the building ( 1 ) and the performing of the biological drying, and optionally discharging, of the waste ( 8 ) are carried out with an unchanged arrangement of the roof, and that the filling of the building ( 1 ) is carried out by dropping the waste ( 8 ) from a conveying device ( 7 ) for continuously conveying the waste ( 8 ), wherein the piling of the waste ( 8 ) takes place to such a height of the mound ( 2 ) that the distance between the roof and the highest point of the mound ( 2 ) is less than 2 m, and the gas- and vapor-permeable, yet water-tight membrane ( 3 ) of the building ( 1 ) is designed to be flexible and is pressed upwardly by the conveying device ( 7 ) in a locally limited manner during the filling of the building ( 1 ).

2. The method according to claim 1 , characterized in that the mound ( 2 ) is aerated from below during said biological drying.

3. The method according to claim 1 , wherein the waste ( 8 ) is piled at a dumping height substantially equally over the total floor area of the building ( 1 ).

4. The method according to claim 1 , wherein the mound ( 2 ) is piled to a height of at least 2 m.

5. The method according to claim 1 , wherein the dropping of the waste ( 8 ) takes place at the conveying speed of the conveying device ( 7 ) for continuously conveying the waste ( 8 ).

6. The method according to claim 5 , wherein the conveying speed is at least 2 m/s.

7. The A method according to claim 1 , wherein the conveying device ( 7 ) is retracted as a function of the filling progress within the building ( 1 ).

8. A device for carrying out the method according to claim 1 , comprising a closed building for receiving the waste piled into a mound, the roof of the building being configured as a gas- and vapor-permeable, yet water-tight membrane, a conveying device suitable for continuously conveying the waste into the interior of the building, and an aeration device for aerating the mound, wherein the roof of the building ( 1 ) is designed to be unchangeable in its arrangement and the conveying device ( 7 ) comprises a spacer ( 12 ) extending substantially in parallel with the conveyor belt above the latter and reaching beyond the delivery end ( 11 ), and the conveying device ( 7 ) is designed such that its delivery end ( 11 ) is lower than the roof of the building ( 1 ) by a maximum of 2 m, and the gas- and vapor-permeable, yet water-tight membrane ( 3 ) is flexible.

9. The device according to claim 8 , wherein the roof of the building ( 1 ) is designed as a flat roof.

10. The device according to claim 8 , wherein the conveying device ( 7 ) is designed as a belt or screw conveyor.

11. A method for treating waste comprised of domestic waste, said method comprising:
filling a closed building with the waste, the closed building having a roof comprising a water tight flexible membrane that is gas and vapor permeable, by dropping the waste from a conveying device for continuously conveying the waste into the interior of the closed building, said conveying device comprising a belt or screw conveyor, said conveying device retractable from a conveying position for filling as a function of the filling progress in the interior of the building, wherein the flexible membrane is pressed upwardly by the conveying device in a locally limited manner during the filling of the closed building with the waste, whereby the waste is piled in a mound in the interior of the closed building, wherein a distance between the highest point of the mound and the roof is less than 2 meters,
aerating the interior of the closed building to biologically dry the waste to obtain dried waste, and having air exhausting out of the closed building through said membrane, and
discharging the dried waste from the building.

12. The method according to claim 11 , wherein distance between the highest point of the mound and the roof is less than 1.5 meters.

13. The method according to claim 12 , wherein distance between the highest point of the mound and the roof is 20 cm to 100 cm.

14. The method according to claim 1 , wherein the mound ( 2 ) is piled to a height of at least 3 m.

15. The method according to claim 6 , wherein the conveying speed is at least 3 m/s.

16. The device according to claim 8 , wherein the spacer ( 12 ) is in the form of a bow.

Assignees

• Holcim Technology Ltd

Inventors

• Maier Beat René

Classifications

• F26B9/02

  in buildings (special types of buildings E04H) · CPC title

• F26B3/06 Primary

  the gas or vapour flowing through the materials or objects to be dried (F26B3/14 takes precedence) · CPC title

• E04D5/00

  Roof covering by making use of flexible material, e.g. supplied in roll form (using stiff sheets E04D3/00; gravelling of flat roofs E04D7/00 {; granulated roof covering E04D7/005}; built-up roofs E04D11/02) · CPC title

• C05F17/979

  the other material being gaseous · CPC title

• B09B1/004

  Covering of dumping sites · CPC title