The printing process is not only used for the printing of books and newspapers, but also often used for other applications such as clothing, electrical appliances, and circuit boards. After the printing process is completed, the cleaning procedure must be con- ducted by using various chemicals such as ethers, alcohols, phe- nols, aldehydes, ketones, benzene, and esters, so that the wastewater often contains a variety of solvents, surfactants, dyes, and other chemicals, thus greatly increasing the difficulty of waste- water treatment. The traditional treatment technologies for print- ing wastewater include chemical coagulation and bio-degradation. For chemical coagulation, a large amount of sludge will be gener- ated, which leads to not only a lot of follow-up costs, but also sec- ondary pollution if not handled properly. As for the bio- degradation treatment, it will take a longtime because many toxic pollutants present in the wastewater will inhibit the microbial activity. Accordingly, an innovative and efficient treatment tech- nology for printing wastewater is highly expected.