NIE Zhong-lin,MA He,LIANG Peng,et al.Treatment Effect of Micro-polluted River Water by Biological Aerated Filters with Different Media[J].China Water & Wastewater,2020,36(17 17):41-48.
Treatment Effect of Micro-polluted River Water by Biological Aerated Filters with Different Media
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
17 17
Page:
41-48
Column:
Date of publication:
2020-09-01
- Keywords:
- zeolite; ceramsite; fiber filler; biological aerated filter; micro-pollution
- Abstract:
- Treatment effects of biological aerated filters (BAFs) on ammonia nitrogen and organic matter in urban micro-polluted river water were explored. Ceramsite, zeolite-ceramic composite and two kinds of elastic fiber materials were utilized as fillers in the packed bed with an effective volume of 150 L, and characteristics and performances of the four kinds of fillers were compared. Nitration loads of ammonia nitrogen of the two granular fillers were higher than those of the fiber fillers, and the optimal HRTs of the granular filler BAF and fiber filler BAF were 1 h and 1.5 h, respectively. The average ammonia nitrogen removal efficiencies of zeolite-ceramic composite filler and ceramic filler were 94.6% and 93.7% respectively when HRT was 1 h, and those of two fiber fillers were 89.5% and 92.6% respectively when HRT was 1.5 h. In addition, the removal of ammonia nitrogen by the granular filler was mainly concentrated on the filler height of 60-100 cm. HRT had a great influence on the inlet pressure and effluent turbidity of the two kinds of granular fillers, but it had little effect on the fiber fillers. When gas-water ratio was 2, the removal efficiencies of ammonia nitrogen and COD of the four fillers were better than those when the gas-water ratios were 1 and 3. The investment cost of fiber filler BAF was higher, but the operational cost was significantly lower than granular filler BAF.
Last Update:
2020-09-01