Influence of recirculation in a lab-scale vertical flow constructed wetland on the treatment efficiency of landfill leachate

Bioresource Technology
Silviya Lavrova, Bogdana Koumanova

Abstract

Landfill leachate taken from a landfill situated in the north-western region of Bulgaria has been treated in a laboratory scale vertical flow constructed wetland (VF-CW) at different flow rates (40, 60 and 82 ml min(-1)) and recirculation ratios (time of water running through wetland to time of quiet water - 1:1; 1:2; 1:3). Young Phragmites australis was planted on the top layer of the reactor. The low flow rate (40 ml min(-1)) and recirculation ratio of 1:3 allowed removal efficiencies of 96% for COD (in 8 days), 92% for BOD(5) (in 3 days), 100% for ammonia (in 5 days) and 100% for total phosphorus (in 2 days). At the highest flow rate studied (82 ml min(-1)) and shorter quiet period (recirculation ratio 1:1) the water needs longer period of treatment (2 days more according to COD). The results of this study indicate that both flow rate and recirculation ratio should be taken into account for proper design of VF-CW.

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Citations

Oct 26, 2010·Bioresource Technology·Tanveer Saeed, Guangzhi Sun
Oct 12, 2010·Bioresource Technology·Tanveer Saeed, Guangzhi Sun
Aug 14, 2015·Environmental Science and Pollution Research International·Haiming WuHai Liu
Jan 31, 2017·The Science of the Total Environment·Dan AMichihiko Ike
May 12, 2017·Journal of Environmental Management·Huma Ilyas, Ilyas Masih
Jan 8, 2014·Waste Management & Research : the Journal of the International Solid Wastes and Public Cleansing Association, ISWA·Olufemi Oludare Aluko, Mkc Sridhar
Apr 25, 2019·International Journal of Phytoremediation·Vitor CanoMarcelo A Nolasco
Nov 24, 2017·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Radomir ObroślakMagdalena Gajewska
Jan 6, 2018·Environmental Science and Pollution Research International·Huma Ilyas, Ilyas Masih
Sep 28, 2018·Environmental Science and Pollution Research International·Guochen LiuYangguo Zhao
Dec 10, 2019·The Science of the Total Environment·Vitor CanoMarcelo A Nolasco
Sep 26, 2020·Ecotoxicology and Environmental Safety·Jiaxing LuJian Zhang
Jun 3, 2021·International Journal of Phytoremediation·María Alejandra MaineMarcelo Abel Campagnoli
Oct 20, 2021·The Science of the Total Environment·V ThomaidiM S Fountoulakis

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