The use of polyaluminum chloride for printing and dyeing wastewater treatment process method The use of polyaluminum chloride for printing and dyeing wastewater treatment process method Description Nowadays, people are increasingly aware of environmental protection, green trade also developed rapidly. However, this has caused tremendous impact on China's foreign trade, especially in textile and apparel, because textile and garment production will generate a lot of waste water during the printing, dyeing and dyeing process. It is understood that the textile enterprises have been found for the shortcomings of dyeing and printing process to find ways to improve, that is, the use of polyaluminum chloride and sodium sulfide and other pharmaceutical agents to deal with their reuse, both to reduce environmental pollution, but also reasonable for water resources Applications. Nowadays, there are a lot of processing technologies for the printing and dyeing wastewater, but most of the processing costs are too high, and the processing does not make any profit for the enterprise. Therefore, a number of methods were used to compare several experiments on dyeing and printing wastewater. The results show that: the use of filter polyaluminum chloride and other water purification agent is more suitable for its treatment, processing operations are also easy, the removal rate of more than 90%, but also can improve the quality of textiles. Recently, the printing and dyeing dyeing wastewater treatment also introduced a biological treatment method is the use of bacteria to deal with their treatment, after all, polyaluminum chloride is a chemical, there are some deficiencies. However, no harm to the biological method, but cumbersome processes, bacterial culture is also more troublesome, but also often appear unsuccessful training. Therefore, most of the textile enterprises are still more willing to choose the materialized method such as polyaluminum chloride to deal with, the reaction fast and efficient. Now, polyaluminium chloride in various sectors of the application status is not so easy to overwhelm, I believe in the near future, the application of polyaluminium chloride will be expanded, application technology will then become more mature. For the printing and dyeing wastewater treatment, the first thing to look at the concentration of suspended solids in water, and then consider the dosing agent, if the incoming water itself is not high, mud should also be normal production or mud too often, the sludge must also Will be thin. In addition, the coagulation sedimentation mud water content is still high, and, if not promptly separated, will unbleached. Filter water purification done a printing and dyeing wastewater test, the use of siphon adsorption separation method, the timely separation of water COD dropped from 190 to 190mg / l, mud can not flow; but not in time separation, less than two The boundaries of muddy water for a few hours, the supernatant turbid.