Columnar activated carbon adsorption pretreatment technology refers to a method of removing pollutants in water by using the adsorption performance or exchange effect of substances. Among them, the most used are hydrophobic substances that have a strong adsorption effect on organic pollutants and odors in water.
However, after the columnar activated carbon participates in the coagulation and sedimentation process, it remains in the sludge. At present, there is no good recovery and regeneration method, which makes the treatment cost high and difficult to promote and apply. activated coconut charcoal powder Although the clay mineral adsorbent has sufficient supply, low price and good adsorption performance, a large amount of clay is put into the coagulant to increase the sludge discharge of the sedimentation tank, which brings certain difficulties to production and operation.
In 1979, a dye factory in Dalian, my country, adopted the process of cooling, sedimentation-activated carbon adsorption-expanded limestone neutralization to treat the washing wastewater containing 1000-2000mg dinitrochlorobenzene and 0.5% acid, and the dinitro group of the effluent The content of chlorobenzene reaches 5mg/L, and the saturated carbon is desorbed with chlorobenzene and regenerated on-site in the tower by purging steam regeneration method.
The activated carbon adsorption method is an effective method for water treatment. In recent years, the research on the application method of activated carbon water treatment has been deepened and gradually has been widely used. bulk activated charcoal pellets However, it should be emphasized that the activated carbon adsorption method is often used as a secondary treatment when it is used in sewage treatment. , And even tertiary processing.
The characteristics of wastewater treatment in developed industrial countries in the world is that secondary treatment accounts for a large proportion. For example, the United States and the former West Germany account for more than 70%, and the United Kingdom accounts for almost 100%. Many countries have begun to study and apply wastewater including activated carbon adsorption. Tertiary treatment, using wastewater as a second water source. In addition, it should be pointed out that the combined water treatment process, including the activated carbon adsorption method, has a better water treatment effect and a wider range of applications.