Aquaculture wastewater quality improvement by water spinach (Ipomoea aquatica Forsskal) floating bed and ecological benefit assessment in ecological agriculture district |
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| Institution: | 1. School of Environmental Science & Engineering, Shanghai Jiao Tong University, Shanghai, PR China;2. Research Center for Ecology and Environment in Three Gorges Areas, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, PR China;3. Civil Engineering Department, New Mexico State University, 3035 South Espina Street, Las Cruces, NM 88003-8001, USA;4. Center for Sustainable Development & Global Competitiveness, Stanford University, 473 Via Ortega, Stanford, CA, 94305, USA;1. Interdisciplinary Graduate School, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore;2. Residues and Resource Reclamation Centre (R3C), Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, CleanTech One, Singapore 637141, Singapore;3. Division of Environmental and Water Resources, School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore;1. Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China;2. School of Resource and Environment, Anhui Agricultural University, Hefei 230036, China |
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| Abstract: | The current ecological situation of aquaculture water quality in Wushe (Songjiang district, Shanghai city) district is not up to mark. In the present study, characteristic of ecological agriculture park was first investigated and then water spinach floating bed was used to improve the aquaculture wastewater quality. The results showed significant improvement in the aquaculture water quality at the experimental site with removal rates of TN, NH4+-N, NO2−-N and TP were 11.2%, 60.0%, 60.2% and 27.3%, respectively. Moreover, we found that the removal mechanism of ammonia nitrogen and nitrate nitrogen by water spinach was mostly by microorganism, whereas the removal mechanism of phosphorus was mainly by plant absorption. In addition, water spinach could be harvested at regular time intervals, which could achieve good economic benefits. This research could provide a good case study for sustainable development in ecological agricultural park for other cities around the world. |
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| Keywords: | Aquaculture wastewater Water spinach floating bed Ecological benefit |
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