As everyone knows the light burning powder magnesium hydroxide can be used as a flame retardant, but many people do not know, in fact, magnesium hydroxide can still sewage treatment, especially in the treatment of printing and dyeing wastewater, has played a crucial role. The magnesium hydroxide manufacturers to explain in detail.
In the textile industry, the printing and dyeing wastewater pollution is more serious, not only contains a considerable amount of organic pollutants and toxic substances, and contain certain dyes and colors, these colors and how to remove the organic pollutants is the focus of governance in recent years in the decolorization of dyeing wastewater treatment, magnesium salt method shows its decolorization decolorization effect principle good is the use of magnesium salt and alkali generation of magnesium hydroxide with positive charge precipitation, strong adsorption of anionic dyes with negative charge to dye wastewater, such as Xu Kun in the thorough research that magnesium salt adsorption time not more than would otherwise occur, so the effect of decolorization of desorption as soon as possible, solid-liquid separation has important influence for the decolorization effect.
Adsorption of magnesium hydroxide has good decolorizing effect, when the combination of the two decolorization effect better by microfiltration treatment combined with magnesium hydroxide adsorption, permeate colorless, clear and transparent, the most likely to be used as printing and dyeing water recycling, this is simply can not achieve the adsorption of magnesium hydroxide; from the process, magnesium hydroxide adsorption process often involves flocculation and sedimentation process there is a possibility, complex process, large floor area and may have the desorption of dye molecules, and MF treatment combined with adsorption, can add pretreatment agent in microfiltration, direct filtration cycle, to achieve a rapid separation, the integration process is simple. The ceramic membrane microfiltration technology of adsorption pretreatment of magnesium hydroxide containing active the dye decolorization of dyeing wastewater treatment is feasible and has the advantages of high removal rate, simple operation, maneuverability and economy of great price Value.