Micro-plastic separation method and device

A separation method and technology for microplastics, which are applied in wet separation, solid separation, plastic recycling, etc., to achieve the effects of reduced use cost, high separation efficiency, and simple device

Active Publication Date: 2017-02-01
INST OF AQUATIC LIFE ACAD SINICA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to address the defects of the existing methods and devices and the gaps in the prior art, and further provide a method for the separation and extraction of microplastic pollutants that can quickly and effectively separate and extract microplastic particles from sediments in rivers, lakes and other water bodies. Method and device

Method used

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Examples

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Embodiment 1

[0045] see figure 1 , the present invention provides a method for separating microplastic pollutants. First, the sediment is pre-treated, and the sediment sample processed by drying (3 The density solution (the density can be adjusted according to the needs). At this time, the gate valve is in an open state. Turn on the stirrer, fully stir the sediment and the density solution and stir for a period of time (30 minutes), and then remove the external stirrer. The solution was left to stand for 24 hours. Close the flapper valve, separate the lower part of the columnar body from the flapper valve, and remove the sediment at the bottom. Use a suction filter to filter the solution in the upper part of the column and the microplastic particles floating on the upper layer of the liquid on the glass fiber filter membrane. Observe the microplastic particles on the filter membrane with the naked eye or with the help of a stereo microscope.

Embodiment 2

[0047] like figure 2 As shown, the present invention provides a device for separating microplastics from sediment. Wherein, the average height of the upper columnar body 1 and the lower columnar body 3 is 15cm, and the average diameter is 10cm. The middle joint is a flapper valve 2, and the bottom has a stirring blade 4 and a motor 8 connected to the stirring blade. The upper columnar body 1 and the lower columnar body 3 are spliced ​​together to form a columnar body. The function of the columnar body is to provide a container for containing the sediment and the density solution; the function of the built-in agitator is to provide stirring force so that the sediment and the density solution can be fully Mix, and let the microplastic particles with lower density gradually float on the upper layer of the solution; the function of the flapper valve 2 is to separate the upper layer solution from the lower layer of sediment after the solution has stood still, and then use the flap...

Embodiment 3

[0049] see image 3 , a device for separating microplastics from sediments provided by the present invention. In order to increase the single-time processing capacity, the volume of the columnar body can increase the upper columnar body 1 and the lower columnar body 3, and the density of the separated microplastics is less than 1.7g / cm 3 , the single treatment volume should be able to fully mix the sediment and the density solution, and the volume of the sediment should not exceed 50% of the volume of the lower column; add the density solution and start the agitator. The stirrer adopts an external metal stirrer, and the metal stirrer includes a base 10, a vertical rod 9, a motor 8 and a stirring blade 4; the vertical rod 9 is arranged on the base 10; the motor 8 is arranged on the vertical rod 9; the motor 8 and the stirring The leaves 4 are connected and drive the stirring leaves 4 to rotate; the rotation speed should be slow at first and then fast until the sediment is comp...

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Abstract

The invention belongs to the technical field of solid waste treatment and relates to a micro-plastic separation method and device. The micro-plastic separation method comprises the steps that (1) settlings of field natural water are collected; (2) the settlings of the field natural water is subjected to low-temperature drying and freeze-drying, and samples to be treated are obtained; (3) after a density solution is added into the samples to be treated, sufficient stirring is conducted until the samples to be treated are completely suspended in the density solution, and a non-sediment layer and a sediment layer are formed from top to bottom after still standing; and (4) the non-sediment layer is extracted and passes through a filter film, liquid passing through the filter film is repeatedly used, and objects isolated by the filter film include but limited to micro-plastic particles in the settlings of the field natural water. The provided micro-plastic pollutant separation method and device are capable of rapidly and effectively separating and extracting the micro-plastic particles in settlings of water such as rivers and lakes.

Description

technical field [0001] The invention belongs to the technical field of solid waste treatment, and relates to a method and device for separating microplastics, in particular to a method and device for separating microplastic pollutants in sediments of water bodies such as rivers and lakes. Background technique [0002] With the production and use of plastic products, plastic waste, as a pollutant widely present in the environment, has gradually attracted people's attention. However, due to its non-degradable properties, plastics can exist in the environment for a long time, including natural water bodies and soils, which greatly enhances the harm of this pollutant. Microplastics refer to plastic particles with a diameter of less than 5 mm, which are usually decomposed from large particles of plastic waste, and can also be produced in additives in personal care products and industrial granular raw materials. The more common source is the discharge of washing wastewater from c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29B17/02B03B5/30B01D61/00
CPCB01D61/00B03B5/30B29B17/02B29B2017/0244Y02W30/62
Inventor 张凯熊雄吴辰熙胡红娟敖鸿毅董航
Owner INST OF AQUATIC LIFE ACAD SINICA
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