ZHANGXiao-na,HUXiao-fang,HEJia-li,et al.Evaluation of Operational Performance of Filter Packed with Different Particle Size Sands for Treating Micro?polluted Source Water[J].China Water & Wastewater,2024,40(1):45-50.
Evaluation of Operational Performance of Filter Packed with Different Particle Size Sands for Treating Micro?polluted Source Water
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第40卷
Number:
第1期
Page:
45-50
Column:
Date of publication:
2024-01-01
- Keywords:
- micro-polluted source water; sand filter; particle size; three-dimensional fluorescence spectrum; operating performance
- Abstract:
- This paper compared the performances of two filters packed with different particle size sands for the removal of particulates, invertebrates, ammonia nitrogen, fluorescent dissolved organic matter and disinfection by-products from micro-polluted source water through productive tests, and analyzed the change of filter head loss in combination with the opening of outlet valve. The particulates in effluent from the fine sand filter were significantly lower than that of the conventional sand filter, indicating that the former had better effluent quality. The fine sand filter demonstrated an average removal rate of 97% for invertebrates, and showed a more stable control performance. The fine sand filter had stronger capacity in resistance to shock load and faster response to ammonia nitrogen, and its ammonia nitrogen removal was increased by 0.80 mg/L compared with the conventional sand filter. Three- dimensional fluorescence spectrum analysis showed that the water to be filtered mainly contained aromatic protein substances and soluble microbial metabolites, and the performance of the fine sand filter for fluorescent dissolved organic matter removal was slightly better than that of the conventional sand filter. In contrast, the fine sand filter demonstrated better performance for control of the precursors of disinfection by-products. In the same operating period of time, the growth rate of head loss of the fine sand filter was higher than that of the conventional sand filter, so the backwashing cycle of the fine sand filter should be adjusted reasonably according to the influent quality.
Last Update:
2024-01-01