PL EN


Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników
2016 | 25 | 5 |
Tytuł artykułu

Analyzing the removal effect of nitrogen before and after enhanced aeration in constructed wetlands

Autorzy
Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
In this research, constructed wetlands were applied to remove the nitrogen of lightly polluted wastewater from a wastewater treatment plant in Tangshan. The results showed that a favorable removal effect of nitrogen could be obtained through constructed wetland. Moreover, the aeration device added to the bottom could increase the removal rates of ammonia nitrogen in lightly polluted wastewater, but the removal of total nitrogen was not satisfactory under this operational condition. In addition, when the bottom aeration device was added, the optimal operation condition was evaluated by three-dimensional (2D and 3D) contour plots. The results showed that in a horizontal zeolite subsurface constructed wetland (HZSW), the optimal removal rates for ammonia nitrogen (which could reach above 98%) were obtained when the average daily aeration time was about 7-17 h and hydraulic loadings were 0.05-0.20 m3/(m2·d). Meanwhile, the optimal removal rates of total nitrogen could reach 56.40-62.60% when the average daily aeration time was less than 5 h and the hydraulic loadings were less than 0.11 m3/(m2·d). In contrast, in a horizontal limestone subsurface constructed wetland (HLSW) the optimal removal rates of ammonia nitrogen (namely 96.44-97.10%) could be obtained when the average daily aeration time was more than 11 h and hydraulic loadings were about 0.10-0.45 m3/(m2·d); meanwhile, the optimal removal effects of total nitrogen, namely 49.25-55.00%, were obtained when the average daily aeration time was less than 8.5 h and the hydraulic loadings were less than 0.13 m3/(m2·d). In summary, the removal effects of ammonia nitrogen increased obviously and that of total nitrogen were depressed apparently after the bottom aeration device was added.
Słowa kluczowe
Wydawca
-
Rocznik
Tom
25
Numer
5
Opis fizyczny
p.2161-2166,fig.,ref.
Twórcy
autor
  • College of Civil and Architectural Engineering, North China University of Science and Technology, Tangshan, P.R. China
autor
  • College of Civil and Architectural Engineering, North China University of Science and Technology, Tangshan, P.R. China
autor
  • College of Civil and Architectural Engineering, North China University of Science and Technology, Tangshan, P.R. China
autor
  • College of Civil and Architectural Engineering, North China University of Science and Technology, Tangshan, P.R. China
autor
  • Tangshan City Drainage Co., Ltd., Tangshan, P.R. China
  • Drainage Engineering Technology Research Center of Tangshan City, Tangshan, P.R. China
Bibliografia
  • 1. Coban O., Kuschk P., Kappelmeyer U., Spott O., Martienssen M., Jetten M. S., Knoeller K. Nitrogen transforming community in a horizontal subsurfaceflow constructed wetland. Water Res. 74, 203, 2015.
  • 2. Murphy C., Wallace S., Knight R., Cooper D., Sellers T. Treatment performance of an aerated constructed wetland treating glycol from de-icing operations at a UK airport. Ecol. Eng. 80, 117, 2015.
  • 3. Calheiros C. S., Quit ério P. V., Silva G., Crispim L. F., Bri x H., Moura S. C., Castro P. M. Use of constructed wetland systems with Arundo and Sarcocornia for polishing high salinity tannery wastewater. J. Environ. Manage. 95 (1), 66, 2012.
  • 4. Ye F., Li Y. Enhancement of nitrogen removal in towery hybrid constructed wetland to treat domestic wastewater for small rural communities. Ecol. Eng. 35 (7), 1043, 2009.
  • 5. Zhang C. B., Wang J., Liu W. L., Zhu S. X., Ge H. L., Chang S. X., Ge Y. Effects of plant diversity on microbial biomass and community metabolic profiles in a full-scale constructed wetland. Ecol. Eng. 36 (1), 62, 2010.
  • 6. Matamoros V., Salvad ó V. Evaluation of the seasonal performance of a water reclamation pond-constructed wetland system for removing emerging contaminants. Chemosphere, 86 (2), 111, 2012.
  • 7. Ayaz S. C., Akta ş Ö., Fındık N., Akça L., Kınacı C. Effect of recirculation on nitrogen removal in a hybrid constructed wetland system. Ecol. Eng. 40, 1, 2012.
  • 8. Tromp K., Lima A. T., Barendregt A., Verhoeven J. T. Retention of heavy metals and poly-aromatic hydrocarbons from road water in a constructed wetland and the effect of deicing. J. Hazard. Mater. 203, 290, 2012.
  • 9. Redmond E. D., Just C. L., Parkin G. F. Nitrogen removal from wastewater by an aerated subsurface-flow constructed wetland in cold climates. Water Environ. Res. 86 (4), 305, 2014.
  • 10. Kato K., Inoue T., Ietsugu H., Sasaki H., Harada J., Kitagawa K., Sharma P. K. Design and performance of hybrid constructed wetland systems for high-content wastewater treatment in the cold climate of Hokkaido, northern Japan. Water Sci. Technol. 68 (7), 1468, 2014.
  • 11. Wang F., Liu Y., Ma Y., Wu X., Yang , H. Characterization of nitrification and microbial community in a shallow moss constructed wetland at cold temperatures. Ecol. Eng. 42, 124, 2012.
  • 12. Dong H., Qiang Z., Li T., Jin H., Chen W. Effect of artificial aeration on the performance of vertical-flow constructed wetland treating heavily polluted river water. J. Environ. Sci. 24 (4), 596, 2012.
  • 13. Murphy C., Wallace S., Knight R., Cooper D., Sellers T. Treatment performance of an aerated constructed wetland treating glycol from de-icing operations at a UK airport. Ecol. Eng. 80, 117, 2015.
  • 14. Hu Y., Zhao Y., Zhao X., Kumar J. L. High rate nitrogen removal in an alum sludge-based intermittent aeration constructed wetland. Environ. Sci. Technol. 46 (8), 4583, 2012.
  • 15. Chazarenc F., Gagnon V., Comeau Y., Brisson J. Effect of plant and artificial aeration on solids accumulation and biological activities in constructed wetlands. Ecol. Eng. 35 (6), 1005, 2009.
  • 16. Maltais -Landry G., Maranger R., Brisson J., Chazarenc F. Nitrogen transformations and retention in planted and artificially aerated constructed wetlands. Water Res. 43 (2), 535, 2009.
  • 17. Liu L., Zhao X., Zhao N., Shen Z., Wang M., Guo Y., Xu Y. Effect of aeration modes and influent COD/N ratios on the nitrogen removal performance of vertical flow constructed wetland. Ecol. Eng. 57, 10, 2013.
  • 18. FAN J., ZHANG B., ZHANG J., NGO H. H., GUO W., LIU F., GUO Y. Y., WU H. Intermittent aeration strategy to enhance organics and nitrogen removal in subsurface flow constructed wetlands. Bioresour. Technol. 141, 117, 2013.
Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.agro-bfa1f512-a6a8-46da-ad9a-720512638ef1
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.