Integrated ecological floating bed treating wastewater treatment plant effluents: effects of influent nitrogen forms
Jinwei Dai1, Shengbing He2, Weili Zhou1
1School of Environmental Science and Engineering, Shanghai Jiao Tong University, Dong Chuan Road 800, Shanghai, 200240, People's Republic of China.
Abstract:
In recent years, the treatment of wastewater treatment plant (WWTP) effluent has gained increasing attention. However, researches on the relationships between nitrogen forms and nitrogen removal efficiency are very limited. Based on the fact that the nitrogen forms in the WWTP effluent may vary as the season changes, the nitrogen removal efficiencies of an integrated ecological floating bed (IEFB) was studied under different influent nitrogen forms. In addition, the effects of sediments in the system were also quantified during the experiment. Results showed that the total nitrogen (TN) removal rates of the IEFB were 25.61 ± 5.72% and 60.03 ± 7.00%, respectively, when the main influent nitrogen forms are nitrate and ammonia. The sediments in the system also played vital roles in the removal processes: when the sediments were covered with a polyethylene membrane, the total nitrogen (TN) removal rate of the system dropped from 27.86 ± 5.53% to 14.78 ± 4.97%, and the total phosphorus (TP), from 58.77 ± 6.20% to 33.51 ± 25.52%.
Related Concept Videos
Ecological Disturbance
Ecological Succession
Ecological Niches
The Nitrogen Cycle
Capillary Beds
Capillaries connect arterioles, small branches of arteries, to venules,...
The Roles of Bacteria and Fungi in Plant Nutrition


