Author: Site Editor Publish Time: 2022-10-25 Origin: Site
As most industrial plating wastewater is complex and may contain toxic elements, it can cause great damage if discharged into the natural environment. Electroplating wastewater usually contains a high concentration of heavy metals, which are difficult for organisms to excrete from their bodies, causing irreversible damage to them. In the process of treating electroplating wastewater using membrane technology, the wastewater is first discharged into a corresponding pond, where it is treated with a fully automatic multi-media filtration system, a self-cleaning filter, which removes most of the particulate matter from the wastewater, and a UF source pond, which regulates the temperature and pH of the wastewater. After a series of treatments, the electroplating wastewater is completely purified and does not cause any pollution to the environment. The characteristics of the membrane process can be summarised in the following four aspects: the ability to operate at normal temperatures without phase changes; concentration and separation at the same time; no need to add other substances and no change in the nature of the separated substances; adaptability and stability of operation.
UF/RO/NF unit membrane separation process flow
The three main processes used in membrane integrated systems are UF/RO/NF. Generally speaking, the cascade process can be upgraded by using UF in parallel, resulting in a water recovery rate of 90% or more. The use of membrane separation technology for the treatment of electroplating wastewater allows the staff concerned to use the selective permeability of the membrane to sort and remove certain harmful components from the electroplating wastewater to achieve the standard of wastewater purification. In the actual process of treating wastewater using membrane separation technology, the effect of closed-circuit recycling can be achieved, as well as zero discharge of heavy metals. Membrane technology is highly efficient and does not produce secondary pollution, so it is worthwhile to promote and popularise its use. Among the UF/RO/NF membranes, the effect of treating electroplating wastewater is basically the same, but there are only differences in the subtle materials and data, which require the electroplating industry to choose according to their actual situation and select the best membrane for the treatment of electroplating wastewater.
Upgraded application of electroplating wastewater treatment technology
For the treatment of electroplating wastewater, a certain amount of time is needed for precipitation and preliminary filtration, in order to speed up the filtration efficiency of the wastewater, filters can be used. In the process of membrane treatment, after precipitation and preliminary filtration, the electroplating wastewater is subjected to deep oxygenation and then alkaline substances are added to neutralise the process, which filters out the larger solids. If you want to improve the COD removal rate in the coagulation process, then you need to make a reasonable choice of coagulant and pay attention to the corresponding working conditions to make the COD removal process have the best effect. The turbidity of the effluent can be controlled by submerged membrane filtration. The form of coagulant attached to the particles depends on the optimum dosage, which should be controlled in a reasonable manner so that the treatment of electroplating wastewater is completed.
