| abstract |
The invention discloses a method for recycling and treating dyeing wastewater of reactive dyes. The method comprises the following steps: (1) adjusting the pH value of the dyeing wastewater to 6.5-7.5; (2) adding star-shaped anionic polymer, stirring, standing and filtering to obtain filtrate; (3) adding cation modified non-woven fabric into the filtrate, stirring, and taking out the non-woven fabric. According to the method disclosed by the invention, 4-8 processes in the traditional treatment process can be shortened to 3 processes, the treatment efficiency is obviously improved, and secondary chemical pollution caused by introducing new chemical substances in the treatment process can be avoided; the treatment effect is good, the reuse water completely meets the requirements of the laws and regulations and the dyeing process, the salt in the wastewater can be reused in the dyeing process, the used salt amount is reduced by about 75 percent, the obtained dyed fabric has the color and the color fastness equivalent to those of the dyed fabric using the conventional water, and the dyeing effect is good. |