The method and systems efficiently extract recyclable materials from a mixed solid waste stream. The methods and systems use sizing, density and dimensional separation to produce intermediate waste streams that are enriched in particular recyclable materials. The recyclable materials can then be efficiently sorted from the individual intermediate streams using mechanized sorting equipment.

Mechanized separation of mixed solid waste and recovery of recyclable products

Solid waste that includes a mixture of wet organic material and dry organic material can be are separated using mechanical separation to produce a wet organic stream enriched in wet organics and a dry organic stream enriched in dry organics. The separated wet organic stream and dry organic stream are separately converted to renewable or recyclable products using different conversion techniques particularly suited for the separated wet and dry organic streams.

Systems and methods for processing mixed solid waste

Methods and systems for separating a mixed waste into a wet organic fraction, a dry organic fraction, and an inorganic fraction are achieved by (i) comminuting the mixed solid waste, (ii) fractionating the comminuted stream by size to produce two or more particle-sized waste streams, and (iii) processing one or more of the particle-sized waste streams using density separation to produce an intermediate wastes stream, and (iv) recovering a homogenous product (e.g., a recyclable material or an organic fuel) from the intermediate waste stream.

Mechanized separation and recovery system for solid waste

A separation system includes an air separator that, in one embodiment, primarily receives Municipal Solid Waste (MSW) containing a mixture of relatively light MSW recyclable materials such as plastic, paper, cardboard, plastic containers, and/or metal containers and relatively heavy MSW such as textiles, food waste, yard debris, etc The air separator blows the relatively light MSW recyclable materials up though a chamber and onto a first conveyor while the other relatively heavy MSW material drops down a chute onto a second conveyor A separation screen receives the relatively light MSW recyclable materials from the air separator and separates the relatively flat fiber and plastic film materials from the other paper, plastic and metal containers In another separation stage, an electrostatic emitter is positioned adjacent to a conveyor for applying an electrostatic charge to the fiber and plastic materials.

Separation system for recyclable material

A separation system includes an air separator that, in one embodiment, primarily receives Municipal Solid Waste (MSW) containing a mixture of relatively light MSW recyclable materials such as plastic, paper, cardboard, plastic containers, and/or metal containers and relatively heavy MSW such as textiles, food waste, yard debris, etc. The air separator blows the relatively light MSW recyclable materials up though a chamber and onto a first conveyor while the other relatively heavy MSW material drops down a chute onto a second conveyor. A separation screen receives the relatively light MSW recyclable materials from the air separator and separates the relatively flat fiber and plastic film materials from the other paper, plastic and metal containers. In another separation stage, an electrostatic emitter is positioned adjacent to a conveyor for applying an electrostatic charge to faciliate separation of the MSW recyclable materials. An optical identification system is configured to distinguish different types of recyclable materials.

Electrostatic material separator

A cross-flow air separation system comprises a conveyor configured to project material out over an end of the conveyor generally along a trajectory path into a far receiving bin An optical sensing system is configured to identify particular objects in the projected material A first air ejection system is configured to generate a first airstream that ejects the identified objects from the trajectory path into a second near receiving bin A second cross air current system is configured to generate a second airstream that reduces air resistance for the materials projected along the trajectory path The second airstream reduces certain aeronautic phenomena that would cause some of the projected materials to unintentionally fall into the wrong receiving bin, thus creating a higher purity/less contaminated materiel stream into the near bin

Cross flow air separation system

A disc screen includes a shaft, a first disc mounted on the shaft, and a second disc mounted on the shaft An interfacial opening (IFO) extends between the first disc and the second disc A width of the IFO as measured between the first disc and the second disc varies according to a rotational position of the shaft

Material sorting discs with variable interfacial opening

A separation screen has multiple discs configured to receive a material stream at an in-feed end and move a first group of materials from the material stream up an inclined angle and over a top out-feed end of the separation screen while a second group of materials from the material steam either fall through openings between the discs while being carried up the separation screen or roll off the in-feed end of the separation screen. A heating system heats an outside surface of the discs so that the discs can separate the first group of materials from the material stream during cold environmental temperatures.

Heating system for material processing screen

A disc screen includes a shaft, a first disc mounted on the shaft, and a second disc mounted on the shaft. An interfacial opening (IFO) extends between the first disc and the second disc. A width of the IFO as measured between the first disc and the second disc varies according to a rotational position of the shaft.

Disc screen with variable interfacial opening and disc for such screen

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