摘要:
A method of processing waste is disclosed wherein the municipal solid waste is segregated and processed to recover reusable rubber, metal, plastic, glass and the remaining organic portion of the waste stream is used to make lactic acid and other chemicals. One process utilizes a pretreatment step with dilute sulfuric acid to reduce the heavy metal content of the cellulosic component of the municipal solid waste which may contaminate the produced lactic acid or inhibit the fermentation of the sugars obtained from such waste. In another, the heavy metal content of the cellulosic component of municipal solid waste is removed via an ionic exchange process, after hydrolysis with sulfuric acid. A process for an economical, energy efficient production of lactic acid from municipal solid waste is also disclosed.
摘要:
Combustible is crushed and dried, and metal and non-combustible are removed from the crushed coarse combustible. Then the crushed coarse combustible is subjected to secondary crushing to be separated into a coarse particle combustible and fluff which is a fine particle combustible. The coarse particle combustible thus separated is charged onto a fire grate (2) of an incinerator (1) to be subjected to plane combustion in a primary chamber (4). On the other hand, fluff is subjected to space combustion in a secondary chamber (7) by a fluff burner (5) for combustion, so that the combustible is incinerated. Accordingly, refuse containing a great deal of plastics which is almost formed into fluff is efficiently treated to increase an amount of refuse incinerated as a whole.
摘要:
A method and a treating system for processing a mixture of a liquid is disclosed wherein a multiple filtration is executed at one or more screening means having different filter mediums such as plates, meshes, micro-meshes, sand and/or activated carbon filters for screening at least a portion of the solid material from the liquid during each screening and wherein the solid material removed by the screenings is set to a composting unit and the screened liquid is subjected to a bacteria killing process.
摘要:
A method and apparatus for treating waste, such as domestic garbage, industrial waste and the like, in which the waste is suspended in a liquid such as to obtain a slurry or a pulp. The constituents of the pulp or slurry are separated into different fractions in accordance with their density and/or magnetic properties or like features. Subsequent to having sorted (18, 24, 26) and removed objects from the pulp or slurry, the pulp or slurry is fed to a wet dryer (32) in which the pulp or slurry is kneaded. As a result, the composite material is separated into its respective constituents; for instance, plastic coatings are separated from their respective substrates, such as paper. The pulp or slurry is washed (36) downstream of the wet grinder (32), in order to remove plastic debris (40). The thus obtained fibre suspension is then led away for further treatment (44) or use. When producting the waste/liquid suspension, the suspension is heated to a temperature of at least 60°C, by delivering hot water or steam thereto. Hot water or steam may also be delivered to the wet grinder, in order to maintain the material therein at a temperature of at least 60°C.
摘要:
A three phase method of treating solid waste to preserve the resource value of the constituent materials. The first phase includes steps to separate ferrous metal from the waste stream, shred and grind the solid waste to generally uniform small particles, dry the waste material to remove essentially all free moisture and render the waste biologically inert, compact the dried waste material into uniform high density blocks, and encapsulate the compacted blocks; included in the second phase are steps to return the compacted blocks to uniform particles and separate the combined constituent materials on the basis of density, with primary processing utilizing a series of fluidized bed and cyclonic separator assemblies and with the secondary processing utilizing combination of vibratory conveyors, melt separation assemblies; and the third phase includes steps to further separate and refine selected recovered materials by chemical treatment.
摘要:
The invention relates to a method for treating composted organic material, comprising the steps of separating the composted material to size to obtain at least two fractions; and subsequently separating at least one of the fractions according to mass to obtain at least two subfractions. The steps of the method, both or individually, can subsequently be repeated one or more times with the subfractions. The separation to size can for instance be performed by means of sieving techniques and the separation according to mass by means of a hydrocyclone, by sedimentation or gravitational separation techniques.
摘要:
Eine Absiebvorrichtung für Kompost bzw. rottefähige, zerkleinerte organische Abfallmaterialien besteht aus einem auf Laufrädern ( 3 ) aufgesetztem Gestell bzw. Grundrahmen ( 1 ) mit Zugmaul ( 1a ), schwenkbarer Bodenabstützung ( 2 ), hydraulischem Antriebssystem ( 4, 5 ) und Einfüllschacht ( 6, 6a ). Der vertikal gerichtete Einfüllschacht ( 6, 6a ) ist nach unten hin durch einen umlaufenden, mit Leisten oder Rippen ( 7a ) besetzten Kratzboden ( 7 ) als Dosiereinrichtung, bis auf einen Material-Durchlaßspalt ( 6b ) zwischen Kratzbodenende und benachbarter Einfüllschachtwandung ( 6a ), abgeschlossen. Im Raum ( R ) darunter befindet sich ein umlaufendes Siebband ( 8, 8a ) mit zugeordneter Klopfeinrichtung ( 13, 14 ) und Material-Austragförderern ( 15, 16 ).
摘要:
Die vorliegende Erfindung betrifft ein Verfahren zum Sortieren von Abfallgemischen, wobei charakteristische Merkmale von Abfallobjekten durch Bestrahlung derselben mit elektromagnetischen und/oder akustischen Wellen erfaßt werden, die Abfallobjekte durch eine Verarbeitung der vom Abfallobjekt ankommenden Wellen durch elektronische Signalverarbeitung identifiziert werden und über die elektronische Signalverarbeitung Signale an eine Abtrennvorrichtung geleitet werden, die das identifizierte Abfallobjekt aus dem Abfallgemisch abtrennt, wobei das Abfallgemisch in Gebinden und/oder lose auf eine Transportstraße aufgegeben wird, Abfallgemische enthaltende Gebinde geöffnet werden, daß eine Grobfraktion identifiziert und abgetrennt wird und von dem verbleibenden Abfallgemisch mindestens eine weitere Fraktion abgetrennt wird, deren Bestandteile identifiziert und sortiert werden.