Upgrading of PVC rich wastes by magnetic density separation and hyperspectral imaging quality control

Luciani, Valentina; Bonifazi, Giuseppe; Rem, Peter; Serranti, Silvia

doi:10.1016/j.wasman.2014.10.015

Cited by 58 publications

(29 citation statements)

References 18 publications

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“…Typical steps in the MDS method are wetting, feeding, sorting and collecting. The MDS method is comparable to the conventional sink-float separation (presented below), but its advantages are a shorter process time and there have no limitations on color [53][54][55].…”

Section: Magnetic Sortingmentioning

confidence: 99%

Mechanical Sorting Processing of Waste Material Before Composite Manufacturing – A Review

Lahtela¹,

Kärki²

2018

JESTR

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This study reviews various mechanical sorting options in the field of solid waste. The interest towards the reuse of waste materials is growing due to the tightened regulation and increasing demand for recycling. The effective reutilization of waste material will be needed sorting technologies, which can be based on the different properties, such as density, electric conductivity, and other surface properties. Several technologies based on sorting were presented decades ago, but in the field of waste, several studies have been published recently that demonstrate to theme being is an essential issue currently. The review summarizes the potential mechanical sorting technologies for solid waste, which were discussed in accessible literature during the last decades. The different methods are included, based on the material properties such as, size, gravity, magnetism, surface tension, electric conductivity, or combinations thereof. The emphasis of technologies are targeted at the methods that are suitable for solid waste material, which can be reused as a raw material in the manufacturing of the products, such as composite production. This kind of operating model promote resource efficient production and contributing circular economy. It is concluded that the efficient sorting results of solid waste materials can be achieved by a combination of several technologies, but a lot of studies will be still needed in the future.

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Section: Magnetic Sortingmentioning

confidence: 99%

Mechanical Sorting Processing of Waste Material Before Composite Manufacturing – A Review

Lahtela¹,

Kärki²

2018

JESTR

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“…Based on the triboelectric sorting technology the Hamos GmbH invented a commercial system which is capable of sorting up to 750 kg/h (Niaounakis, 2013). Another recently invented sorting technology is based on magnetic density separation whereby mixed flakes of plastic residues are filled into a magnetic liquid which flows through a magnetic field in order to separate flakes based on their mass densities (Luciani et al, 2014). With this sorting method both a sorting purity and accuracy of at least 90% can be achieved (Hu et al, 2011).…”

Section: Physico-chemical and Spectroscopic Sortingmentioning

confidence: 99%

Automated sorting of polymer flakes: Fluorescence labeling and development of a measurement system prototype

2015

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“…Nowadays the most common techniques employed in mechanical recycling plants to separate plastics are based on optical, fluorescent and infrared properties [5,6], electrostatic forces [7,8], flotation by hydrophilic character [9,10], thermal treatment [11], and density differences [12]. All processes present drawbacks related to cost, performance and environmental hazards such as the influence of moisture, surface status, and low feeding speed of particles in electrostatic separation; the need for an additive in separation by flotation and density; the wide range of density values for the same typology of plastic materials makes the choice of the density for sink and float separation challenging.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of the Productivity of a Wet Separation Process of Traditional and Bio-Plastics

et al. 2018

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Abstract:The separation process within a mechanical recycling plant plays a major role in the context of the production of high-quality secondary raw materials and the reduction of extensive waste disposal in landfills. Traditional plants for plastic separation employ dry or wet processes that rely on the different physical properties among the polymers. The hydraulic separator is a device employing a wet technology for particle separation. It allows the separation of two-polymer mixtures into two products, one collected within the instrument and the other one expelled through its outlet ducts. Apparatus performance were analyzed as a function of fluid and solid flow rates, flow patterns developing within the apparatus, in addition to the density, shape, and size of the polymers. For the hydraulic configurations tested, a two-way coupling takes place where the fluid exerts an influence on the plastic particles and the opposite occurs too. The interaction between the solid and liquid phases determines whether a certain polymer settles within the device or is expelled from the apparatus. Tests carried out with samples of increasing volumes of solid particles demonstrate that there are no significant differences in the apparatus effectiveness as far as a two-way interaction takes place. Almost pure concentrates of Polyethylene Terephthalate (PET), Polyvinyl Chloride (PVC), and Polycarbonate (PC) can be obtained from a mixture of traditional polymers. Tests conducted on Polylactic Acid (PLA) and Mater-Bi ® samples showed that the hydraulic separator can be effectively employed to separate bio-plastics from conventional plastics with remarkable grade and recovery.

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Upgrading of PVC rich wastes by magnetic density separation and hyperspectral imaging quality control

Cited by 58 publications

References 18 publications

Mechanical Sorting Processing of Waste Material Before Composite Manufacturing – A Review

Mechanical Sorting Processing of Waste Material Before Composite Manufacturing – A Review

Automated sorting of polymer flakes: Fluorescence labeling and development of a measurement system prototype

Experimental Investigation of the Productivity of a Wet Separation Process of Traditional and Bio-Plastics

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