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Three clean products from co-mingled waste using a novel hydrodynamic separator

Three clean products from co-mingled waste using a novel hydrodynamic separator
Three clean products from co-mingled waste using a novel hydrodynamic separator
Mixed municipal solid waste currently landfilled contains a high percentage of packaging glass, varying from 33% to 80% by weight according to several sample characterizations, due to the lack of high throughput separation technology. The hydrodynamic separator proposed is a closed-loop device developed to separate co-mingled waste into plastics, glass and other dense particles and organic sludge. The glass and other dense material stream is cleaned by the system, permitting efficient downstream optical sorting to take out metals and ceramics and, if required, glass sorted by colour. The plastics and the organic sludge are separate, processable waste streams. As the solid waste is introduced in the separator, the action of water jets located on the ramps of a fixed sinusoidal-shape bottom and the presence of hydrofoils at the upper part of the tank produce a flow pattern that lead plastics towards its collection point on the surface, while glass and ceramics are settled to the bottom of the tank and transported to the extraction point. Organics and other fine particles are obtained from lamellas, before reintroducing the clarified fluid into the flow loop. The sludge obtained from this process is suitable for feedstock to Anaerobic Digestion processes. In the present paper the equipment and the methodology is described and the physical principles of the separation process are explained. Results from a full scale trial designed to process 9.7 tonnes per hour at a municipal UK waste site operating in Nov 2015 – Feb 2016 are presented.
1743-761X
792-803
Blay Esteban, Luis
cbfef12f-f6c3-460f-b614-c347c0291351
Shrimpton, John
9cf82d2e-2f00-4ddf-bd19-9aff443784af
Rogers, Paul
45953a28-19db-4e57-89ca-77af82bd8165
Ingram, Ross
5f46e4ae-7b55-442b-89be-f65a649ee15d
Blay Esteban, Luis
cbfef12f-f6c3-460f-b614-c347c0291351
Shrimpton, John
9cf82d2e-2f00-4ddf-bd19-9aff443784af
Rogers, Paul
45953a28-19db-4e57-89ca-77af82bd8165
Ingram, Ross
5f46e4ae-7b55-442b-89be-f65a649ee15d

Blay Esteban, Luis, Shrimpton, John, Rogers, Paul and Ingram, Ross (2016) Three clean products from co-mingled waste using a novel hydrodynamic separator. International Journal of Sustainable Development and Planning, 11 (5), 792-803. (doi:10.2495/SDP-V11-N5-792-803).

Record type: Article

Abstract

Mixed municipal solid waste currently landfilled contains a high percentage of packaging glass, varying from 33% to 80% by weight according to several sample characterizations, due to the lack of high throughput separation technology. The hydrodynamic separator proposed is a closed-loop device developed to separate co-mingled waste into plastics, glass and other dense particles and organic sludge. The glass and other dense material stream is cleaned by the system, permitting efficient downstream optical sorting to take out metals and ceramics and, if required, glass sorted by colour. The plastics and the organic sludge are separate, processable waste streams. As the solid waste is introduced in the separator, the action of water jets located on the ramps of a fixed sinusoidal-shape bottom and the presence of hydrofoils at the upper part of the tank produce a flow pattern that lead plastics towards its collection point on the surface, while glass and ceramics are settled to the bottom of the tank and transported to the extraction point. Organics and other fine particles are obtained from lamellas, before reintroducing the clarified fluid into the flow loop. The sludge obtained from this process is suitable for feedstock to Anaerobic Digestion processes. In the present paper the equipment and the methodology is described and the physical principles of the separation process are explained. Results from a full scale trial designed to process 9.7 tonnes per hour at a municipal UK waste site operating in Nov 2015 – Feb 2016 are presented.

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More information

Accepted/In Press date: 13 September 2016
Published date: 30 September 2016
Organisations: Aerodynamics & Flight Mechanics Group

Identifiers

Local EPrints ID: 401325
URI: https://eprints.soton.ac.uk/id/eprint/401325
ISSN: 1743-761X
PURE UUID: 354bffb4-6ddc-4850-872b-81dc26410fd6

Catalogue record

Date deposited: 17 Oct 2016 08:55
Last modified: 19 Jul 2019 19:42

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