Due to the different waste water treatment technology has a different effect on different types of pollutants, even if it is the same with cationic dyes wastewater, but because of its different dye content will affect the treatment of wastewater, a single kind of water treatment technology to dyestuff wastewater requires using different water treatment technologies to be combined in order to achieve economy, efficiency, and compliance purposes. Therefore, the cationic dye wastewater treatment processing technology to optimize the direction of development, especially in some advanced oxidation treatment technology or electrochemical processing technology and development of chemical and biochemical treatment technology of. Hangzhou, one of China's largest manufacturer of cationic dye near chemicals Ltd for its wastewater treatment, using a two-stage chemical-electro-adsorption process to preprocess the cationic dye wastewater with high concentration, and then mixed with wastewater, domestic wastewater of low concentration, and cationic dye production wastewater treatment with contact oxidation, adsorption process. Results showed that the total removal of COD in 99.8%, color total removal for 99.99%, the indicators have reached the water of integrated wastewater discharge standard (GB8978-1996) standard.
With the improvement of people's living standards, have an increasingly higher demands for environmental quality and emissions standards more stringent. Cationic dye, due to its high colority and poor biochemical property of complex components, features, and is thus the difficulty in current industrial waste water treatment, for people working on a variety of effective, low cost, simple operation control technology research. But the most important thing is to break simple end treatment ideas, pay attention to the principle of combining prevention, cleaner production, pollution control, active development of new dye production techniques, make full use of resources and energy, reduce the pressure to end treatment, in order to achieve strategic objectives for sustainable development.