Enhanced Purification of Eutrophic Water by Microbe-Inoculated Stereo Floating Beds
Fengliang Zhao1,2, Songda Zhang1,3, Zheli Ding1, Rukhsanda Aziz1, Muhammad Tariq Rafiq1, Hong Li1, Zhenli He4, Peter J. Stoffella4, Xiaoe Yang1
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1MOE Key Lab of Environmental Remediation and Ecosystem Health,
College of Environmental and Resources Science, Zhejiang University, Hangzhou 310058, P.R. China
2Danzhou Scientific Observing and Experimental Station of Agro-Environment, Ministry of Agriculture,
Enviroment and Plant Protection Instiute, Chinese Academy of Tropical Agricutrural Science (CATAS),
Danzhou 571737, Hainan, P.R. China
3Ningbo Water Resource Group Ltd., Ningbo 315195, P.R. China
4Indian River Research and Education Center, Institute of Food and Agricultural Sciences,
University of Florida, Fort Pierce, FL 34951-3138, USA
Pol. J. Environ. Stud. 2013;22(3):957–964
This study was conducted to investigate the feasibility of using floating beds of tall fescue plants (Festuca arundinacea) inoculated with denitrifying polyphosphate accumulating microorganisms (DPAOs). In the presences of DPAOs, tall fescue showed greater removal of NH+4-N, NO-3-N, total N (TN), and orthophosphate (ortho-P) after a 20-day treatment. The average removal rates were 86.32%, 93.60%, 90.12%, 72.09%, and 84.29%, respectively, for NH+4-N, NO-3-N, TN, total P (TP), and ortho-P. Tall fescue plants grew well on the floating beds and the average growth rate was approximately 5.4 g DM m-2·d-1. Tall fescue plants, being rich in crude potein, Ca, Mg, Fe, and Mn, can meet the daily feed requirements of livestock and poultry and were found safe to be used as animal feed.