HAORun-qiu,SHOUHuan-huan,ZHANGCheng-kai,et al.Cooling and UV Advanced Oxidation Process for Treatment of Evaporation Mother Liquor from Zero-discharge System[J].China Water & Wastewater,2022,38(21):72-75.
Cooling and UV Advanced Oxidation Process for Treatment of Evaporation Mother Liquor from Zero-discharge System
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
第21期
Page:
72-75
Column:
Date of publication:
2022-11-01
- Abstract:
- Wastewater zero-discharge is a contemporary developing trend of factories and industrial parks in China. The majority of the wastewater is reused into the production system after treatment, and a small part is treated as hazardous waste. The final disposal process for zero-discharge projects is usually evaporation or incineration. The evaporation process will produce mother liquor, which cannot be returned to the evaporation system because of high COD and salt content. It can only be treated as hazardous waste, which leads to high treatment cost. The combined process of cooling and ultraviolet advanced oxidation is capable of treating the mother liquor and solves the existing problems. When the cooling temperature was -5 ℃, the desalting performance was better, and the desalting rate reached 65.23%. When the ozone dosage, hydrogen peroxide dosage and irradiation time were 600 mg/L, 0.75 g/L and 3 h, the COD removal rate was 48.2%, and the TOC removal rate was 44.8%. The salt content and COD of the wastewater were greatly reduced after the treatment. The wastewater could be returned to the original evaporation system, so as to achieve zero-discharge.
Last Update:
2022-11-01