Printing and dyeing wastewater treatment activated carbon, high-quality wood as raw material, the use of zinc chloride production, has developed in the pore structure, adsorption capacity, fast filtering features. Mainly applicable to a variety of amino acid industry bleaching, refined sugar bleaching, MSG industry, glucose industry, starch sugar industry, chemical additives, dyes intermediates, food additives, drugs of high pigment solution, purification, odor, purify. Activated carbon is a porous carbon-containing material, it has a highly developed pore structure, is a very good adsorbent, activated carbon adsorption area per gram equivalent of eight tennis and drinking places much while its adsorption is by reached by the physical adsorption and chemical adsorption. Its composition material in addition to carbon, but still contains a small amount of hydrogen, nitrogen, oxygen and ash, the formation of six carbon ring structure was made of material accumulation. For the six ring carbon irregular arrangement, resulting in a microporous activated carbon volume and high surface area. Many types of activated carbon can be made of carbon-containing substances that include wood, sawdust, coal, coke, peat, lignin, stone, hard shell, sugar pulp, bone, lignite, petroleum residues and the like. Including coal and coconut shell activated carbon has become the most commonly used raw Youdou. The manufacture of activated carbon is basically divided into two processes, the first process including dehydration and carbonization, the raw material is heated at a temperature of 170 至 600 ℃ dried, and about 80% of the original organic matter charring. The second process is to make the charcoal-activated, it is through the use of activators such as water vapor and carbon react to completion in the endothermic reaction is mainly produced mixed gas composed of CO and H2 for burning charcoals heated to the appropriate temperature (800 to 1000 ℃), to burn them all biodegradable material, resulting well-developed porous structure and huge surface area, which has a strong adsorption capacity