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Treatment method and equipment for sewage containing heavy metal ions

A technology of heavy metal ions and treatment methods, which is applied in the field of sewage treatment containing heavy metal ions, and can solve the problems of complex pollutant components, death, and affecting treatment effects, etc.

Inactive Publication Date: 2021-07-30
XIANYANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Trivalent chromium can be treated by flocculation and other methods, and hexavalent chromium is often treated by biological treatment. However, the pollutants in the chromium-containing sewage of chemical enterprises are complex, and the biological treatment method is generally aimed at the removal of hexavalent chromium ions to cultivate special biological bacteria. When the concentration of hexavalent chromium ions or other pollutants is high, it will also have an impact on the biological bacteria, resulting in their death, thereby affecting the treatment effect
[0004] Although the above-mentioned equipment has good sewage treatment performance and can comprehensively use the advantages of flocculants and microbial cells to perform flocculation treatment and biodegradation treatment on sewage respectively, they separate the flocculation and microbial treatment steps in different devices. It needs to go through two treatment steps, and the operation is cumbersome. The flocculation tank and the biological treatment tank occupy two equipment spaces, and the volume is large. If a kind of equipment and process can be developed that combines the two, the sewage treatment process can be simplified. The combined equipment only needs to occupy one equipment space, which helps to save space

Method used

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  • Treatment method and equipment for sewage containing heavy metal ions
  • Treatment method and equipment for sewage containing heavy metal ions
  • Treatment method and equipment for sewage containing heavy metal ions

Examples

Experimental program
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Effect test

Embodiment 1

[0039] A kind of flocculation-biological integrated treatment equipment for sewage containing heavy metal ions, see figure 1 , including a regulating tank 1, a flocculation-biological treatment tank 2 and a sedimentation recovery tank 3 connected in sequence through pipelines. The regulating tank 1 is provided with a sewage inlet, and the sewage inlet is used to feed chemical sewage containing heavy metal ions, such as chromium ions For chemical sewage, preferably, a sewage lifting pump is installed at the sewage inlet, and the sewage is injected into the regulating tank 1 by the power of the sewage lifting pump. In the adjustment tank 1, the sewage is adjusted to a pH value suitable for flocculation and biological treatment by acid or lye, and a stirring device can also be installed in the adjustment tank 1 to fully mix the materials. Redox reactions can also be carried out in the regulating pool 1 to change the valence state of the heavy metal ions to be treated. It should ...

Embodiment 2

[0052] A flocculation-biological integrated treatment equipment for sewage containing heavy metal ions, which has basically the same structure as that of Example 1, the difference being:

[0053] In order to increase the stability of the collection body 24 on the inner bottom wall of the pool body 21 and the transverse grid plate 22, see Image 6 , the pool body 21 is provided with a plurality of longitudinal grid plates 23, these horizontal grid plates 22 and a plurality of longitudinal grid plates 23 are arranged in a criss-cross pattern, and the inner space of the pool body 21 is divided into a plurality of storage compartments, each storage compartment A collector 24 is placed inside, and the horizontal grid plate 22 is provided with an insertion port that allows the vertical grid plate 23 to be inserted. In a horizontal grid plate 22. The grid size on a plurality of horizontal grid plates 22 and a plurality of vertical grid plates 23 is smaller than the collection body 2...

Embodiment 3

[0056] A flocculation-biological integrated treatment equipment for sewage containing heavy metal ions, which has basically the same structure as that of Example 2, the difference being:

[0057] see Figure 7-8 , the inner wall of the channel cavity 243 is scattered with a number of adsorption plates 2431, and the adsorption plates 2431 are used to load microorganisms. Prepared from porous ceramic material or porous glass fiber material, and fixed on the inner wall or outer wall of the channel cavity 243 by bonding or other fixing methods; or use the adsorption disc 2431 to wrap the cultured microbial solid bacterial agent, and after continuing to cultivate for 1-2 hours, make the microorganism Gradually transfer to the adsorption disk 2431, then gently shake off the solid bacterial agent floating on the surface of the adsorption disk 2431, and install the adsorption disk 2431 on the inner or outer wall of the channel cavity 243. At this time, the adsorption disk 2431 is made...

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Abstract

The invention belongs to the technical field of sewage treatment, and particularly relates to a treatment method and equipment for sewage containing heavy metal ions. The method comprises the following steps: sewage is introduced into an adjusting tank, the sewage of which the pH is adjusted by the adjusting tank enters a flocculation-biological treatment tank, a flocculating agent loaded on the flocculation-biological treatment tank performs flocculation treatment on heavy metal ions, and the flocculated heavy metal ions enter a channel cavity and are adsorbed and degraded by microorganisms; and the flocculation-biological treatment pond comprises a pond body, a plurality of transverse grid plates are arranged in the pond body, the pond body is divided into a plurality of storage areas, a collecting body is placed on the transverse grid plate in each storage area, and the collecting bodies are used for loading the flocculating agent and the microorganisms. Flocculation treatment and biodegradation treatment are combined in one device, equipment space is saved, flocculation treatment and biodegradation treatment are carried out at the same time, and the sewage treatment process is simplified.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a treatment method and equipment for sewage containing heavy metal ions. Background technique [0002] Heavy metal ion sewage may contain hexavalent chromium, trivalent chromium, lead and other ions. Since the chrome tanning process in the textile industry and other chemical companies that contain chromium are mostly produced, sewage containing hexavalent chromium and trivalent chromium ions is more common. The valence state of chromium compounds determines its toxicity. It is generally believed that the toxicity of hexavalent chromium is 500 times that of trivalent chromium. Trivalent chromium can be treated by flocculation and other methods, and hexavalent chromium is often treated by biological treatment. However, the pollutants in the chromium-containing sewage of chemical enterprises are complex, and the biological treatment method is generally aimed at ...

Claims

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Application Information

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IPC IPC(8): C02F9/02C02F9/14C02F9/04C02F3/34C02F1/52C02F101/20
CPCC02F1/52C02F3/34C02F9/00C02F2101/20
Inventor 李玉红陈宏伟王迁赵维陈佑宁
Owner XIANYANG NORMAL UNIV
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