Treatment method of beryllium-containing sewage

A treatment method and technology for sewage, which is applied in the fields of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc. There are many problems such as many materials, so as to achieve the effect of low cost, less waste residue and simple process

Inactive Publication Date: 2013-12-25
西北稀有金属材料研究院宁夏有限公司
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Problems solved by technology

The above methods have the following problems: 1. High processing cost; 2. Too much sludge is generated; 3. The cultivation and preparation of biological agents are cumbersome and not suitable for large-volume sewage treatment; 4. The required treatment materials are various

Method used

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  • Treatment method of beryllium-containing sewage
  • Treatment method of beryllium-containing sewage

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Embodiment Construction

[0016] 1. The beryllium-containing sewage is lifted into the settling tank through the sludge pump. In this process, sodium hydroxide or potassium hydroxide (concentration: 40g / L-100g / L) is first added for neutralization, and the PH value of the neutralized sewage Control between 8.5-11.

[0017] 2. In the process of lifting sewage, add polyaluminum chloride, the concentration is 25mg / L, and the amount of polyaluminum chloride added is 75-100mg / L sewage. At this time, after the beryllium ions and hydroxide ions in the sewage form small beryllium hydroxide particles, the polyaluminum chloride coagulates to form large fleece particles. In order to better precipitate beryllium hydroxide, the solution after neutralization and flocculation should be statically precipitated, and there are many factors that affect the precipitation effect, such as precipitation speed, raw water properties, pH value, dosage, temperature, etc. In actual operation, the precipitation time is often contr...

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Abstract

The invention relates to a treatment method of beryllium-containing sewage. The method is characterized by firstly neutralizing the beryllium-containing sewage with alkali, adjusting the pH value to be 8.5-11, then adding polymeric aluminium to precipitate flocs and treating the supernatant and bottom precipitate after layering respectively after standing for 2-4 hours. In the treatment method, the free settling principle is adopted and the content of beryllium in the sewage is reduced to the minimum by neutralizing the sewage and precipitating the flocs so that the sewage reaches the national discharge standard (<=5mu g / L). The treatment method has the beneficial effects that the treatment method has the advantages of simple process, few used materials and low cost and the produced waste residues are less and are convenient to treat, so that the treatment method is suitable for treating sewage in high flow.

Description

technical field [0001] The invention relates to the technical field of nonferrous metal production, in particular to a treatment method for beryllium-containing sewage. Background technique [0002] Beryllium-containing wastewater will be generated during the production of beryllium. Although the content of beryllium in wastewater is small, its toxicity is very high. If it enters the lungs, liver, kidneys and other organs of the human body, it will cause chronic poisoning and endanger human health. [0003] At present, the treatment methods of beryllium-containing wastewater include chemical precipitation, ion exchange, adsorption, electrolysis, etc., and these methods are costly. The Chinese patent "Method for Treating Beryllium-Containing Wastewater with Biological Agents" (application number: 2008101438643) provides a method for using biological agents to treat beryllium-containing wastewater. Biological agents such as Thiobacillus ferrothiogen or Thiobacillus thiooxidan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04
Inventor 孙建文刘宁宁邓六良姚怡春
Owner 西北稀有金属材料研究院宁夏有限公司
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