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Advantages and disadvantages of electroplating wastewater treatment methods



Source: Industrial electroplating wastewater treatment Author: Industrial heavy metals Date: 2018-07-11 13:43 Browse:

If electroplating wastewater is directly discharged into amber collecting water without treatment, it will cause serious harm. The toxic and harmful substances in wastewater will stay in the body after ingestion and absorption of passive plants, and then reach the human body through the food chain, causing harm to human body. Some pulmonary edema also carries an unpleasant odor that contaminates the air. For example, lead in electroplating wastewater can lead to fish and aquatic organisms poisoning, even death. 5% - 10% of the lead is absorbed into the human body through food or water. When accumulated, lead in bone can cause endogenous poisoning. When the blood lead reaches 60 ~ 80 μ g / 100cm3, there will be headache, fatigue, memory loss, insomnia, loss of appetite and other symptoms. Therefore, it is important to study the applicable electroplating wastewater treatment methods in the current sewage treatment business.
 
At present, physical and chemical methods are generally used to treat electroplating wastewater. There are many treatment methods for electroplating wastewater, and there are many effective treatment methods, but few of them can reach the overall standard. But there are also good ones. For example, DTCR heavy metal ion capture agent of futianbao in Shaanxi Province forms macromolecular chelates with heavy metal ions in wastewater through DTCR, and then flocculates. The removal of heavy metal ions in electroplating wastewater can meet the national standard.
 
Here are a few Electroplating wastewater treatment The advantages and disadvantages of the method are introduced
 
The process design of electroplating wastewater treatment method is determined according to the characteristics of wastewater, the composition and conditions of the enterprise and the water quality parameters after treatment, and is determined by comprehensive technical and economic comparison.
There are many treatment methods for electroplating wastewater: resin exchange, electrolysis in 1980s, and air flotation. According to the practice of electroplating wastewater treatment in our factory for 20 years, resin exchange has advantages in treating precious metal ion wastewater and recovering precious metal.
Electroplating wastewater treatment method: electrolysis method: generally used in small and medium-sized factories. Its main characteristics are that it does not need to add processing chemicals, the process is simple, the operation is convenient, the production site is small, and the recovery metal purity is high, so it can be used to recover valuable articles. Metal has good economic benefits. However, there is also a large amount of power consumed by the electrolysis process. At the same time, the separated sludge is as easy to treat as the chemical treatment method, so it is less used now. Therefore, it is an ideal method to treat the wastewater containing cyanide by chemical method Air floatation And floating method. The proportion of electroplating sludge is large, and the wastewater contains various organic additives. In practice, the separation of air floatation is not complete and the operation and management are not convenient. By the end of 1990s, more and more air floatation methods were used.
 
      Treatment of electroplating wastewater Chemical precipitation method: the application of this method, after more than 30 years of different treatment processes, the actual use of the comparison. At present, it has returned to an effective treatment process. Most foreign countries use this method for electroplating. However, after the actual solid-liquid separation operation time is long, the sedimentation tank will have sludge, and it is difficult to ensure stable compliance.
 
    In recent years, the biological treatment process of electroplating wastewater treatment method: small amount of water single electroplating operation effect is high, many large-scale engineering use is very unstable, because the water quality and water quantity are difficult to be constant, microbial water temperature, variety, heavy metal ion concentration, pH value changes are difficult to adapt to stably, a large number of microbial death, environmental pollution accidents, and bacterial culture and Not easy.


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