Sustainable management of landfill leachate concentrate through recovering humic substance as liquid fertilizer by loose nanofiltration

Ye, Wenyuan1; Liu, Hongwei1; Jiang, Mei2; Lin, Jiuyang2; Ye, Kunfeng2; Fang, Shengqiong2; Xu, Yudong2; Zhao, Shuaifei3,4; Van der Bruggen, Bart5; He, Zhen6

2019-06-15

10.1016/j.watres.2019.02.060

WATER RESEARCH   影响因子和分区

0043-1354

The hybrid membrane bioreactor - nanofiltration treatment process can be an effective approach for treating the landfill leachate, but the residual leachate concentrate highly loaded with the humic substance and salts remains an environmental concern. Herein, a loose nanofiltration membrane (molecular weight cut-off of 860 Da) was used to recover the humic substance, which can act as a key component of organic fertilizer, from the leachate concentrate. The loose nanofiltration membrane showed the high permeation fluxes and high transmissions (>94.7%) for most inorganic ions (i.e., Na+, K+, Cl-, and NO3-, while retaining 95.7 +/- 0.3% of the humic substance, demonstrating its great potential in effective fractionation of humic substance from inorganic salts in the leachate concentrate. The operation conditions, i.e., cross-flow rates and temperatures, had more pronounced impacts on the filtration performance of the loose nanofiltration membrane. Increasing cross-flow rates from 60 to 260 L h(-1) resulted in an improvement of ca. 7.3% in the humic substance rejection, mainly due to the reduced concentration polarization effect. In contrast, the solute rejection of the nanofiltration membrane was negatively dependent on the temperature. The rejection of humic substance decreased from 96.3 +/- 0.3% to 92.0 +/- 0.4% with increasing the temperature from 23 to 35 degrees C, likely due to the enlargement of the membrane pore size and enhancement in solute diffusivity. The humic substance was enriched from 1735 to 15,287 mg L-1, yielding a 91.2% recovery ratio with 85.7% desalination efficiency at a concentration factor of 9.6. The recovered HS had significantly stimulated the seed germination and growth of the green mungbean plants with no obvious phytotoxicity. These results demonstrate that loose nano filtration can be an effective promising technology to recover the humic substance as a valuable fertilizer component towards sustainable management of the landfill leachate concentrate. (C) 2019 Elsevier Ltd. All rights reserved.

Landfill leachate concentrate Loose nanofiltration membrane Fractionation Humic substance recovery Fertilizer Sustainable management

SCI ; EI

英语

NI期刊

其他

Fuzhou University[XRC-1622]

Engineering ; Environmental Sciences & Ecology ; Water Resources

Engineering, Environmental ; Environmental Sciences ; Water Resources

WOS:000468253500053

PERGAMON-ELSEVIER SCIENCE LTD

20191706812998

Bioreactors ; Desalination ; Fertilizers ; Fractionation ; Microfiltration ; Nanofiltration ; Nanofiltration membranes ; Pore size ; Recovery ; Salts ; Seed ; Sustainable development

Water Treatment Techniques:445.1 ; Chemical Plants and Equipment:802.1 ; Chemical Operations:802.3 ; Chemical Products Generally:804 ; Agricultural Products:821.4 ; Materials Science:951

ENVIRONMENT/ECOLOGY

Web of Science

1.Fujian Agr & Forestry Univ, Coll Resources & Environm, Fujian Prov Key Lab Soil Environm Hlth & Regulat, Fuzhou 350002, Fujian, Peoples R China
2.Fuzhou Univ, Sch Environm & Resources, Fujian Prov Engn Res Ctr Rural Waste Recycling Te, Fuzhou 350116, Fujian, Peoples R China
3.Macquarie Univ, Dept Environm Sci, Fac Sci & Engn, Sydney, NSW 2109, Australia
4.Southern Univ Sci & Technol, Sch Environm Sci & Engn, State Environm Protect Key Lab Integrated Surface, Shenzhen 518055, Peoples R China
5.Katholieke Univ Leuven, Dept Chem Engn, Proc Engn Sustainable Syst ProcESS, Celestijnenlaan 200F, B-3001 Leuven, Belgium
6.Virginia Polytech Inst & State Univ, Dept Civil & Environm Engn, Blacksburg, VA 24061 USA

Ye, Wenyuan,Liu, Hongwei,Jiang, Mei,et al. Sustainable management of landfill leachate concentrate through recovering humic substance as liquid fertilizer by loose nanofiltration[J]. WATER RESEARCH,2019,157:555-563.

Ye, Wenyuan.,Liu, Hongwei.,Jiang, Mei.,Lin, Jiuyang.,Ye, Kunfeng.,...&He, Zhen.(2019).Sustainable management of landfill leachate concentrate through recovering humic substance as liquid fertilizer by loose nanofiltration.WATER RESEARCH,157,555-563.

Ye, Wenyuan,et al."Sustainable management of landfill leachate concentrate through recovering humic substance as liquid fertilizer by loose nanofiltration".WATER RESEARCH 157(2019):555-563.