What are the common treatment methods and characteristics of metal sewage treatment equipment?
What are the common treatment methods and characteristics of metal sewage treatment equipment? Author: Now there is a lot of metal wastewater treatment equipment market, sewage treatment equipment is metal processing metal wastewater treatment. Heavy metal sewage refers to sewage containing heavy metals discharged from industrial production processes such as mining and metallurgy, machinery manufacturing, chemical engineering, electronics, and instrumentation. Heavy metal (such as cadmium, nickel, mercury, zinc, etc.) sewage is one of the industrial sewage that pollutes the environment the most and harms humans the most. Its water quality and quantity are related to the production process. The heavy metals in sewage generally cannot be decomposed and destroyed, and can only move their locations and transform their physical and chemical forms. Heavy metal pollutants are difficult to treat. They accumulate to a certain limit in the water body, which will cause serious harm to the water body-aquatic plant-aquatic animal system, and may affect human's own health through the food chain. Heavy metal sewage is produced in many production processes in mining and metallurgy, machinery manufacturing, chemical industry, electronics, instrumentation and other industries. This sewage seriously affects the health and life of children and adults. If the human body consumes too much molybdenum, it will It can cause gout-like syndrome, joint pain and deformity, kidney damage, growth retardation, arteriosclerosis, and degeneration of pedicle tissue. At present, lead poisoning in children, fetal malformations caused by heavy metals, and arsenic poisoning have also occurred frequently, making heavy metal pollution a major environmental problem related to human health and life. Treatment methods can be divided into two categories: One is to convert the heavy metals in the dissolved state of the sewage into insoluble heavy metal compounds or elements, which are removed from the sewage by precipitation and floatation. The neutralization precipitation method, the sulfide precipitation method, and the floatation separation method can be used. Method, ion flotation method, electrolytic precipitation or electrolytic floatation method, diaphragm electrolysis method, etc.; the second is to concentrate and separate heavy metals in sewage without changing their chemical form. Reverse osmosis, electrodialysis, Evaporation method, ion exchange method, etc. The first type of methods, especially the neutralization precipitation method, the sulfide precipitation method and the electrolytic precipitation method, are the most widely used. From the perspective of heavy metal wastewater reuse, the second type of method is superior to the first type, because the second type of method is used to treat the heavy metals in the original state, without adding any chemicals, and can be directly reused in the production process. With the first type of method, heavy metals can only be recycled and reused with the help of chemical agents that have been used multiple times and undergo multiple chemical transformations. The sewage treatment equipment produced by the environmental protection water treatment equipment company, with the continuous advancement of technology, has met the water needs of different industries. The environmental protection water treatment equipment company has always put the interests of customers first, reducing customer maintenance costs and delaying the service life of the equipment. Environmental protection water treatment equipment company welcomes your purchase.
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