Effluents in chemical laboratories often contain a variety of hazardous substances that need to be treated accordingly before they can be discharged into the environment. In order to protect the environment and human health, chemical laboratories must be equipped with appropriate sewage treatment equipment. This article will introduce the working principle, types and operational precautions of sewage treatment equipment in chemical laboratories.
First, the working principle.
The working principle of the sewage treatment equipment in the chemical laboratory is to use chemical reactions to convert harmful substances into harmless substances, so as to achieve the purpose of purifying sewage. Generally speaking, the treatment process consists of two parts: physical and chemical methods. The physical method is to remove suspended solids, color, turbidity and other substances from sewage through filtration and sedimentation. The chemical method is to add chemical agents to react with harmful substances, and finally convert them into non-toxic and harmless substances, such as carbon dioxide, water, etc.
2. Types. Common chemical laboratory sewage treatment equipment includes chemical precipitation method, chemical oxidation method, biological treatment method, etc. Among them, the chemical precipitation method is suitable for the treatment of wastewater containing heavy metal ions and suspended particles. In this process, by adding iron salts, aluminum salts and other agents, the heavy metal ions and suspended particles in the sewage form small particle aggregates, and finally separated by precipitation. The chemical oxidation method is suitable for treating sewage with a lot of organic matter and odorous substances. By adding oxidants such as ozone and chlorine, organic matter can be oxidized and decomposed into smaller harmless substances, and odors can be removed at the same time. The biological treatment method is suitable for treating wastewater with a high content of organic matter. It works by converting organic matter into harmless substances such as carbon dioxide and water through the action of biologically active microflora.
3. Precautions for operation.
Safety. Chemical laboratory sewage treatment equipment involves chemical reactions, and attention should be paid to the explosion-proof, leak-proof, anti-corrosion and other safety measures of the equipment.
Selection and installation of equipment and facilities. For the treatment of different types of sewage and intensity, it is necessary to choose suitable equipment. At the same time, it is necessary to pay attention to indoor ventilation and the placement of equipment to ensure safe operation.
Add the chemistry correctly. Different sewage needs to add different chemicals, and it is necessary to operate in strict accordance with the amount of chemicals.
Regular maintenance. Regularly check the operation of the equipment, replace the filter element and other consumables in time, and keep the equipment clean to prolong the service life of the equipment.
In summary, chemical laboratory wastewater treatment equipment is essential to protect the environment and human health. Correct understanding and use of sewage treatment equipment can maximize the effect of sewage purification and contribute to the sustainable development of human health and ecological environment.