With the rapid development of industry, the discharge of electroplating wastewater is increasing, which poses a serious threat to the environment and human health. Electroplating wastewater contains a large number of heavy metal ions, such as chromium, nickel, copper, zinc, etc., which are extremely harmful to the ecosystem and human health. Therefore, how to effectively treat electroplating wastewater has become an urgent problem to be solved. As a new type of water treatment technology, electrocoagulation technology has the advantages of high efficiency, environmental protection and easy operation, and is widely used in the treatment of electroplating wastewater.
First, the principle of electrocoagulation technology.
Electrocoagulation is a method of treating water using electrochemical principles. Under the action of electric field, soluble anode metal ions will lose electrons to form insoluble metal hydroxides, which can separate suspended solids, organic matter, heavy metal ions and other pollutants in water from water through adsorption, flocculation, net capture and other actions, so as to achieve the purpose of purifying water quality.
Second, the advantages of electrocoagulation equipment.
1.High treatment efficiency: The electrocoagulation equipment converts the harmful substances in the wastewater into harmless substances or easy-to-treat forms through electrochemical reactions, and has high treatment efficiency.
2.Wide range of applications: Electrocoagulation technology can be applied to many types of wastewater treatment, including industrial wastewater, domestic sewage, etc.
3.Environmental protection and energy saving: electric flocculation technology is a physical treatment method, which will not produce secondary pollution, and the energy consumption required for equipment operation is low, which is in line with the concept of green environmental protection.
4.Easy to operate: The operation of the electrocoagulation equipment is simple and easy to understand, easy to realize automatic control, and reduce labor costs.
3. Application of electrocoagulation equipment in electroplating wastewater treatment.
Electrocoagulation equipment has a wide range of applications in electroplating wastewater treatment. First of all, for the heavy metal ions contained in the electroplating wastewater, the electrocoagulation equipment can convert these harmful substances into hydroxide precipitation through electrochemical reactions, and then separate them from the water. The experimental results show that the concentration of heavy metal ions in the electroplating wastewater after electrofloculation treatment can meet the requirements of the national discharge standard.
Secondly, for the organic pollutants in the electroplating wastewater, the electrocoagulation equipment can decompose them into small molecule organic and inorganic substances through electrochemical reactions, thereby reducing the organic load of the wastewater. At the same time, these decomposition products can also be used as components of flocculants to further improve the treatment effect of wastewater.
In addition, for suspended solids and other impurities in electroplating wastewater, electrocoagulation equipment can separate them from water through adsorption, flocculation, net capture and other actions. The experiment shows that the suspended solids and other impurities in the electroplating wastewater after electroflocculation treatment are effectively removed, and the transparency and water quality of the wastewater are improved.
IV. Conclusions. To sum up, electrocoagulation equipment has a wide range of application prospects in the treatment of electroplating wastewater (including heavy metals). As an efficient, environmentally friendly and easy-to-operate water treatment technology.