Method and device for removing heavy metals and POPs in organic wastes by electromagnetic reinforcement

Abstract

The invention discloses a method and a device for removing heavy metals and POPs in organic wastes by electromagnetic reinforcement. The method comprises the following steps of: firstly preparing theorganic wastes into slurry; applying a magnetic field to the slurry to make sure that the heavy metals and the POPs in the slurry are transformed into a water solution state; separating the organic waste slurry into two components; afterwards applying an electric field to the slurry, migrating water molecules and the heavy metals and POPs which are continuously transformed into the water solutionstate to a cathode region of the electric field under the effect of electro-migration, and meanwhile migrating the components of the organic wastes to an anode region of the electric field so as to realize separation of the two components; and filtering and dehydrating the organic waste slurry to finally obtain harmless low-water-content organic wastes. The method and the device disclosed by the invention can be used for efficiently removing large-particle impurities, some heavy metals and the POPs in the organic wastes, can also reduce the water content of the organic wastes to 30% to 50%, thereby overcoming the defects that a traditional organic waste treatment method is low in efficiency, takes effect slowly and has no oneness.

Description

technical field [0001] The invention relates to a method and a device for removing heavy metals and POPs in organic waste through electromagnetic strengthening, and belongs to the field of resource utilization of organic waste. Background technique [0002] Organic waste contains a large amount of heavy metals and other harmful substances. If these organic wastes cannot be disposed of reasonably and safely, it will cause serious pollution to our living environment. Heavy metal persistent poisons are widely found in various types of organic waste. In traditional organic waste treatment methods, heavy metal elements will be fixed through bacterial absorption, adsorption on the surface of mineral particles, and co-precipitation of some inorganic salts. , into the organic waste produced. Among them, the stable forms of Hg, Pb, and As are relatively high, and almost all exist in the form of residues, while the unstable forms of Ni, Cd, Zn, and Cr are relatively high. These heav...

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Problems solved by technology

[0006] Aiming at the limitations of the existing technology in the treatment of heavy metals and persistent organic pollutants in organic waste, that is, the existing problems of low efficiency and slow onset of removal of heavy metals and persistent organic pollutants, the present invention provides an electromagnetic enhanced An efficient removal method for heavy metals and POPs in organic waste, that is, first make the organic waste into a slurry with high water content, and then use a magnetic field to act on the hydrogen bonds of water molecules, transition metal atomic enzymes and microorganisms in the organic waste to change the organic waste. The electric double layer structure on the surface promotes the conversion of heavy metals and POPs in the organic waste slurry to a water-soluble state, and the organic waste slurry is initially separated into two components. Molecularly combined heavy metals and POPs migrate to the cathode area of ​​the electric field, and organic waste components migrate to the anode area of ​​the electric field to achieve the separation of the two, and then filter and dehydrate them, and finally obtain harmless and low moisture content. Waste, so as to optimize the entire organic waste treatment process and realize its resource utilization efficiently; specifically, it includes the following steps:

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