KANGYa,GAOHong-tao,SHENLei,et al.Comparison of Activated Carbon Filter with Different Flow Directions in Actual Operation[J].China Water & Wastewater,2023,39(9):45-49.
Comparison of Activated Carbon Filter with Different Flow Directions in Actual Operation
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第39卷
Number:
第9期
Page:
45-49
Column:
Date of publication:
2023-05-01
- Keywords:
- biological activated carbon filter; downflow; upflow; purification performance; advanced treatment
- Abstract:
- B waterworks and S waterworks are the first waterworks to adopt ozone/biological activated carbon process in Zhengzhou City. In 2013, the original conventional treatment processes were upgraded by adding advanced treatment processes of downflow and upflow activated carbon filters, respectively. The long?term operation and monitoring of the activated carbon filters in the two waterworks were carried out to compare their adaptability to water bodies in northern China. After 7 years of operation, the adsorption index of the downflow activated carbon filter deteriorated more seriously, and there was no significant difference in strength and particle size of the activated carbon. The effluent quality was similar after stable operation, and the two activated carbon filters had similar removal efficiencies of CODMn. In terms of biofilm, the attached growth of biofilm was faster in the downflow filter. However, there was a risk of biological leakage as it was located at the end of the process. In terms of management, the upflow filter needed no regular forced backwashing, indicating that it was more energy-saving. Therefore, the upflow activated carbon filter showed a better performance in areas with stable raw water quality.
Last Update:
2023-05-01