LEI Chen,XU Lu,ZHANG Qiong-hua,et al.Advanced Treatment of Secondary Effluent from a Wastewater Treatment Plant by Ultraviolet Activated Persulfate[J].China Water & Wastewater,2020,36(15 15):86-92.
Advanced Treatment of Secondary Effluent from a Wastewater Treatment Plant by Ultraviolet Activated Persulfate
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
15 15
Page:
86-92
Column:
Date of publication:
2020-08-01
- Abstract:
- Secondary effluent from wastewater treatment plants (WWTPs) can be used as the source of reclaimed water, and organic substance has always been an important indicator of concern. Ultraviolet activated persulfate process (UV/PS) was utilized to degrade dissolved organic matters(DOC) in the secondary effluent from a wastewater treatment plant. The treatment efficiencies of UV, PS, UV/PS and UV/TiO2 were compared. Besides, the effect of PS dosage on treatment performance of UV/PS was investigated. Moreover, fluorescence characteristics and relative molecular mass of the dissolved organic matter in the secondary effluent before and after UV/PS treatment were analyzed. Finally, the active oxidizing substances generated during the reaction were analyzed through EPR technology. UV/PS process exhibited the best performance on the degradation of secondary effluent when the PS concentration was 5 mmol/L, and the removal efficiencies of chromaticity, UV254, UV280 and DOC were as high as 100%, 89%, 91% and 96%, respectively. Fluorescent substances and macromolecular organic substances in the secondary effluent were effectively degraded during the treatment process. The combination of sulfate radical and hydroxyl radical had a good performance of oxidizing organic substances.
Last Update:
2020-08-01