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

A technology of organic waste and electromagnetic enhancement, applied in the field of resource utilization of organic waste, can solve the problems of slow onset and low efficiency, and achieve the effect of improving activity and promoting removal.

Active Publication Date: 2018-11-23
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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:

Method used

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

Examples

Experimental program
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Effect test

Embodiment 1

[0046] Embodiment 1: The method of electromagnetically strengthening the removal of heavy metals and POPs in organic wastes of urban sewage plants, the specific operations are as follows:

[0047] 1. This method treats 800kg of municipal organic waste

[0048] The electromagnetic reactor is a cuboid with a height of 1m, a length of 1.5m, and a width of 0.8m; the length of the electrodes is 80cm, and the distance between the negative and positive electrode pairs is 30cm; The number of turns of the coil is 10, the inductance is 2μH; the external power supply voltage of the cathode electrode and the anode electrode is 2V, the frequency is 50Hz, the cathode electrode and the anode electrode are graphite electrodes; the length of the aeration tube is 1.2m, and the density of micropores on the aeration tube It is 20 pieces / cm², adopts continuous air blowing method, and the aeration speed is 5m / s.

[0049] 2. The specific method is:

[0050] (1) Prepare the organic waste into a slu...

Embodiment 2

[0054] Embodiment 2: Electromagnetic strengthening removes the method for heavy metal and POPs in livestock and poultry excrement, concrete operation is as follows:

[0055] 1. This method handles 500kg of livestock and poultry manure

[0056] The electromagnetic reactor is a cuboid with a height of 0.5m, a length of 1m, and a width of 0.5m; the length of the electrodes is 45cm, and the distance between the negative and positive electrode pairs is 10cm; The number of turns of the coil is 20, the inductance is 9μH; the external power supply voltage of the negative electrode and the positive electrode is 1V, the frequency is 50Hz, and the negative electrode and the positive electrode are both carbon electrodes; the length of the aeration tube is 0.8m, and the micropore density on the aeration tube is 20 pcs / cm², using continuous air blowing method, the aeration speed is 10m / s.

[0057] 2. The specific method is:

[0058] (1) Prepare the organic waste into a slurry with a water...

Embodiment 3

[0063] In the remaining organic waste of a certain urban sewage treatment plant, the contents of heavy metals Cu, As, and Zn were 80.8 mg / kg, 26.8 mg / kg, and 468 mg / kg respectively. Weighed 30 g of organic waste and put it into the electromagnetic reactor experimental device. The reactor is a cuboid, 10cm high, 20cm long, and 8cm wide; the electrode is 18cm long, and the interval between the negative and positive electrode pairs is 5cm; the negative electrode and the positive electrode are fixed on the top of the reaction pool, and the magnetic induction coil is connected to an external power supply voltage of 30V. 15, the inductance is 5μH; the external power supply voltage of the electrode is 4V, the frequency is 50Hz, the cathode electrode and the anode electrode are both graphite electrodes; the length of the aeration tube is 15m, the micropore density on the aeration tube is 10 / cm 10m / s.

[0064] The method and device of this embodiment are the same as those in Embodiment...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00
CPCB09B3/00
Inventor 瞿广飞何康蔡营营李锐何艳华高海均
Owner KUNMING UNIV OF SCI & TECH
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