XUYao,CHENJia-bin,LIUTong-cai,et al.Pilot Study on Peracetic Acid/Ultraviolet Disinfection of Sewage[J].China Water & Wastewater,2023,39(7):23-28.
Pilot Study on Peracetic Acid/Ultraviolet Disinfection of Sewage
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第39卷
Number:
第7期
Page:
23-28
Column:
Date of publication:
2023-04-01
- Keywords:
- peracetic acid; ultraviolet; sewage disinfection; total coliform; Escherichia coli; disinfection by-products
- Abstract:
- This paper used a pilot-scale peracetic acid and ultraviolet (PAA/UV) combined process to disinfect effluent from municipal wastewater treatment plants for the first time, and investigated the disinfection efficiency of different dosage combinations of PAA and UV and their effects on effluent quality and the generation of disinfection by-products. Compared with single PAA and UV disinfection, PAA/UV process was more efficient for total coliform disinfection. When PAA dosage was 4 mg/L and its contact time was 5 min, UV dose was 20 J/cm2 and its contact time was 30 s, the logarithmic removal rate of total coliform reached 4.58-lg, while that was only 1.53-lg and 2.15-lg respectively by the single PAA and UV disinfection. Under the above conditions, PAA/UV disinfection had little influence on NH3-N, COD and TOC in the effluent, and Escherichia coli was not detected, which met the requirements specified in The Reuse of Urban Recycling Water—Water Quality Standard for Urban Miscellaneous Use (GB/T 18920-2020). In addition, compared with the traditional NaClO disinfection process, PAA/UV process did not produce disinfection by-products such as trihalomethanes and haloacetic acid.
Last Update:
2023-04-01