In the field of sewage treatment, the color problem of sewage is often a key link to be solved. Many industrial wastewater and domestic sewage contain various pigments, dyes and other color substances, resulting in different degrees of color in the water body, which not only affects the appearance of beauty, but also may imply the presence of harmful substances in the water, posing a potential threat to the environment and ecosystem. The appearance of water fading agent provides an effective means to solve this problem.
Sewage bleaching agents are a class of chemical agents specially designed to remove color from sewage. Through a variety of mechanisms of action, they can react with the chromogenic substances in sewage to change their structure, so as to achieve the purpose of fading.
One common principle of action is REDOX reaction. Some of the wastewater bleaching agents have strong oxidation properties, which can decompose the organic dyes in the wastewater into colorless or light-colored small molecules. For example, oxidants such as sodium hypochlorite, which are commonly used, can destroy the conjugated structure of dye molecules, making them lose their color rendering ability. Another mode of action is flocculation precipitation. The water fading agent can make the small particles and color substances in the water gather to form a large floc, and then remove it from the water by precipitation or filtration, so as to achieve the fading of the water.
The water fading reagent has many advantages. First of all, they have efficient fading performance, which can significantly reduce the color of sewage in a short time, so that the sewage becomes clear and transparent. Secondly, it has a certain selectivity and can play a role for different types of color substances, whether it is a specific dye in industrial wastewater or a natural pigment in domestic sewage, it can find a suitable sewage bleaching agent for treatment. In addition, the use of sewage fading agents is relatively simple, according to the amount of water and color of sewage, accurate control of the dosage of agents, through simple stirring and other operations can achieve better fading effect.
In practical applications, sewage bleaching agents usually need to be combined with other sewage treatment processes to achieve better treatment results. For example, the use of wastewater bleaching agents in the front-end pretreatment stage of the sewage treatment plant can reduce the burden of subsequent biological treatment and improve the efficiency and stability of the entire sewage treatment system. At the same time, with the continuous improvement of environmental protection requirements, sewage fading agents are also constantly developing in the direction of environmental protection, high efficiency and low cost, and more environmentally friendly and excellent treatment products have been developed.
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