WU Qing,MA Meng-xing,MO Wen-jun,et al.Nitrogen Removal in Landscape Water by Solar Aeration-Enhanced Biological Floating Bed[J].China Water & Wastewater,2021,37(13 13):92-97.
Nitrogen Removal in Landscape Water by Solar Aeration-Enhanced Biological Floating Bed
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
13 13
Page:
92-97
Column:
Date of publication:
2021-07-01
- Keywords:
- landscape water; nitrogen; enhanced ecological floating bed; solar aeration; immobilized aerobic denitrifying bacteria
- Abstract:
- Five groups of floating beds were constructed to solve the increasing eutrophication problem in landscape water. Effects of the combined floating beds enhanced by solar aeration, ceramsite filler, Canna and immobilized aerobic denitrifying bacteria on removal efficiency of nitrogen and organic matters in eutrophic water were explored. The combined floating bed with aeration or ceramsite filler played a major role in the removal of COD. The COD removal efficiency of the floating bed with aeration increased by 25% compared with that of non-aerated floating bed, and the COD removal efficiency of the floating bed with filler increased by 20% compared with that of floating bed without filler. Aeration had a good effect on NH4+-N removal, and NH4+-N removal efficiency of the floating bed with aeration was 81.17% higher than that of non-aerated floating bed. Aeration could promote nitrification reaction. NO2--N concentration increased with the decrease of ammonia nitrogen, and variation in NO3--N concentration was synchronized with that of NO2--N concentration to some extent. The combined ecological floating bed with immobilized aerobic denitrifying bacteria particles had the best nitrogen removal performance, in which the removal efficiencies of NH4+-N and TN were 97.57% and 50.24%, respectively. The addition of immobilized aerobic denitrifying bacteria shortened the nitrogen conversion process, improved the nitrogen conversion efficiency, and facilitated the removal of nitrogen in water.
Last Update:
2021-07-01