Abstract
Floating treatment wetlands (FTWs) and biofilm carriers are widely used in water purification. The objective of the present work was to explore whether and to what extent an FTW integrated with plants and biofilm carriers (FTW-I) could enhance the nutrient removal efficiency. Significantly higher removal rates of ammonia nitrogen (85.2 %), total phosphorus (82.7 %), and orthophosphate (82.5 %) were observed in the FTW-I treatment relative to the FTW with plants (FTW-P; 80.0, 78.5, and 77.6 %, respectively) and the FTW with biofilm carriers (FTW-B; 56.7, 12.9, and 13.4 %, respectively) (p < 0.05). The mass balance results indicated that plant uptake was the main pathway for N and P removal (accounting for 58.1 and 91.4 %, respectively) in FTW-I, in which only 1.2 % of the N and 5.7 % of the P was deposited on the bottom of the tank. In addition, the plants translocated 43.9 and 80.2 % of the N and P in the water and 83.5 and 88.3 % of the absorbed N and P, respectively, into their aboveground tissues. The combination of an FTW and biofilm carriers can improve the efficiency of water purification, and nutrients can be rapidly removed from the system by harvesting the aboveground plant tissues.
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References
Borne KE (2014) Floating treatment wetland influences on the fate and removal performance of phosphorus in stormwater retention ponds. Ecol Eng 69:76–82
Borne KE, Fassman-Beck EA, Tanner CC (2014) Floating treatment wetland influences on the fate of metals in road runoff retention ponds. Water Res 48:430–442
Cao WP, Zhang YQ (2014) Removal of nitrogen (N) from hypereutrophic waters by ecological floating beds (EFBs) with various substrates. Ecol Eng 62:148–152
Chen Y, Wen Y, Zhou Q, Vymazal J (2014) Effects of plant biomass on nitrogen transformation in subsurface-batch constructed wetlands: a stable isotope and mass balance assessment. Water Res 63:158–167
Gregor J, Marsalek B (2004) Freshwater phytoplankton quantification by chlorophyll a: a comparative study of in vitro, in vivo and in situ methods. Water Res 38:517–522
Han P, Vijayaraghavan K, Reuben S, Estrada ES, Joshi UM (2013) Reduction of nutrient contaminants into shallow eutrophic waters through vegetated treatment beds. Water Sci Technol 68:1280–1287
Headley TR, Tanner CC (2012) Constructed wetlands with floating emergent macrophytes: an innovative stormwater treatment technology. Crit Rev Env Sci Tec 42:2261–2310
Hu GJ, Zhou M, Hou HB, Zhu X, Zhang WH (2010) An ecological floating-bed made from dredged lake sludge for purification of eutrophic water. Ecol Eng 36:1448–1458
Hubbard RK, Anderson WF, Newton GL, Ruter JM, Wilson JP (2011) Plant growth and elemental uptake by floating vegetation on a single-stage swine wastewater lagoon. T ASABE 54:837–845
Keizer-Vlek HE, Verdonschot PFM, Verdonschot RCM, Dekkers D (2014) The contribution of plant uptake to nutrient removal by floating treatment wetlands. Ecol Eng 73:684–690
Li WX, Li ZJ (2009) In situ nutrient removal from aquaculture wastewater by aquatic vegetable Ipomoea aquatica on floating beds. Water Sci Technol 59:1937–1943
Li XN, Song HL, Li W, Lu XW, Nishimura O (2010) An integrated ecological floating-bed employing plant, freshwater clam and biofilm carrier for purification of eutrophic water. Ecol Eng 36:382–390
Li J, Yang X, Wang Z, Shan Y, Zheng Z (2015) Comparison of four aquatic plant treatment systems for nutrient removal from eutrophied water. Bioresource Technol 179:1–7
Lu RK (1999) Soil Agro-chemical analyses. China Agriculture Science and Technologic Press Beijing
Moortel AMK, Meers E, Pauw N, Tack FMG (2010) Effects of vegetation, season and temperature on the removal of pollutants in experimental floating treatment wetlands. Water Air Soil Poll 212:281–297
Peng L, Hua YM, Cai JB, Zhao JW, Zhou WB, Zhu DW (2014) Effects of plants and temperature on nitrogen removal and microbiology in a pilot-scale integrated vertical-flow wetland treating primary domestic wastewater. Ecol Eng 64:285–290
Sheng YQ, Qu YX, Ding CF, Sun QY, Mortimer RJG (2013) A combined application of different engineering and biological techniques to remediate a heavily polluted river. Ecol Eng 57:1–7
Wang CY, Sample DJ (2014) Assessment of the nutrient removal effectiveness of floating treatment wetlands applied to urban retention ponds. J Environ Manage 137:23–35
Wang CY, Sample DJ, Bell C (2014) Vegetation effects on floating treatment wetland nutrient removal and harvesting strategies in urban stormwater ponds. Sci Total Environ 499:384–393
Winston RJ, Hunt WF, Kennedy SG, Merriman LS, Chandler J, Brown D (2013) Evaluation of floating treatment wetlands as retrofits to existing stormwater retention ponds. Ecol Eng 54:254–265
Xu M, Bernards M, Hu ZQ (2014) Algae-facilitated chemical phosphorus removal during high-density Chlorella emersonii cultivation in a membrane bioreactor. Bioresource Technol 153:383–387
Zhang CB, Liu WL, Pan XC, Guan M, Liu SY, Ge Y, Chang J (2014) Comparison of effects of plant and biofilm bacterial community parameters on removal performances of pollutants in floating island systems. Ecol Eng 73:58–63
Zhi W, Ji GD (2014) Quantitative response relationships between nitrogen transformation rates and nitrogen functional genes in a tidal flow constructed wetland under C/N ratio constraints. Water Res 64:32–41
Zhong F, Liang W, Yu T, Cheng SP, He F, Wu ZB (2011) Removal efficiency and balance of nitrogen in a recirculating aquaculture system integrated with constructed wetlands. J Environ Sci Heal A 46:789–794
Zhu LD, Li ZH, Ketola T (2011) Biomass accumulations and nutrient uptake of plants cultivated on artificial floating beds in China’s rural area. Ecol Eng 37:1460–1466
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This study was supported by the Key Project of the National Science and Technology Program (2012BAJ25B07 and 2012ZX07103-004).
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Zhang, L., Zhao, J., Cui, N. et al. Enhancing the water purification efficiency of a floating treatment wetland using a biofilm carrier. Environ Sci Pollut Res 23, 7437–7443 (2016). https://doi.org/10.1007/s11356-015-5873-9
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DOI: https://doi.org/10.1007/s11356-015-5873-9