Optimizing Operational Parameters of O3/BAC under Different Water Sources
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
9 9
Page:
47-51
Column:
Date of publication:
2020-05-01
- Keywords:
- font-size: 10pt; ">ozone/biological activated carbon (O font-size: 10pt; "> 3/BAC); disinfection by-products; ozone dosage; carbon bed residence time
- Abstract:
-
In recent years, ozone/biological activated carbon (O 3/BAC) process has been widely used in China, which plays an important role in controlling the formation of disinfection byproducts in drinking water. Researches and practices show that optimizing operational parameters of O3/BAC is very important to improve the purification efficiency. The J waterworks in Jiangsu Province has two water sources (H and X) with great difference in water quality. Therefore, a pilot plant was constructed, and the optimization of operational parameters of O3/BAC was carried out to control the formation of disinfection byproducts. With the increase of ozone dosage, the removal efficiency of trihalomethane formation potential (THMFP) in H and X water source increased first and then gradually tended to be stable, while the removal efficiency of haloacetic acid formation potential (HAAFP) increased first and then decreased. The removal efficiencies of THMFP and HAAFP both increased first and then tended to be stable with the extension of carbon bed residence time. Considering the removal efficiencies of THMFP and HAAFP, the operational parameters of the optimized O3/BAC were as follows: ozone dosage and carbon bed residence time were 0.5 mg/L and 12 min for H water source, and those were 2.0 mg/L and 12 min for X water source.
Last Update:
2020-05-01