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):92-97.
太阳能曝气—生物强化浮床对景观水体中氮素的去除
- Title:
- Nitrogen Removal in Landscape Water by Solar Aeration-Enhanced Biological Floating Bed
- 关键词:
- 景观水体; 氮素; 强化生态浮床; 太阳能曝气; 固定化好氧反硝化细菌
- Keywords:
- landscape water; nitrogen; enhanced ecological floating bed; solar aeration; immobilized aerobic denitrifying bacteria
- 摘要:
- 针对景观水体富营养化现象日益严重，设置5组实验装置，探究太阳能曝气、轻质陶粒填料、美人蕉及固定化好氧反硝化细菌颗粒强化组合生态浮床对富营养化水体中氮素和有机物的去除效果。结果表明，组合浮床中曝气和填料的设置对COD的去除起主要作用，设置曝气浮床较无曝气浮床的COD去除率提高了25%，设置填料浮床较无填料浮床的COD去除率提高了20%。曝气对NH4+-N的去除可起到很好的效果，设置曝气浮床较无曝气浮床的NH4+-N去除率提高了81.17%。曝气可促进硝化反应的进行，NO2--N会随氨氮浓度的降低而上升，且NO3--N浓度变化与NO2--N浓度变化具有一定的同步性。添加了固定化好氧反硝化细菌颗粒的组合生态浮床对氮素的去除效果最佳，其中对NH4+-N的去除率达到了97.57%、对TN的去除率为50.24%。固定化好氧反硝化细菌的加入可缩短氮素的转化进程，提高氮素的转化效率，利于氮素的去除。
- 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.
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