Co-treatment process for PET cleaning wastewater and boiling wastewater

• Main Author: CHEN YAOTING
• Format: Patent
• Language: Chinese; English
• Published: 23.06.2023
• Subjects: CHEMISTRY; METALLURGY; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention relates to the field of wastewater treatment processes, in particular to a co-treatment process for PET cleaning wastewater and boiling wastewater. The invention relates to a PET cleaning wastewater and boiling wastewater co-treatment process, which comprises: (1) filtering PET cleaning wastewater through a filtration mechanism to obtain a filtration liquid; (2) enabling the filtrate obtained in the step (1) and printing and dyeing boiling wastewater to flow into a treatment tank together, ensuring that the temperature in the treatment tank does not exceed 50 DEG C, and adding acid liquor or alkali liquor to adjust the pH value to be neutral or slightly alkaline; (3) the waste liquid obtained in the step (2) is input into a flocculation basin, a flocculating agent is added, then the waste liquid passes through air flotation separation equipment, and the flocculating agent is a composition of PAC, PAM and polymeric ferric sulfate; (4) carrying out nitrogen and phosphorus removal treatment on the