Volume 9 Issue 5
Sep.  2019
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Article Navigation >  Journal of Environmental Engineering Technology  > 2019  >  9(5): 552-558
XI Daoguo, ZHANG Ruibin, ZHOU Nai, CHEN Fan, ZU Baiyu, WANG Leyang. Characteristics of aluminum sludge composite filler and its application in constructed wetlands[J]. Journal of Environmental Engineering Technology, 2019, 9(5): 552-558. doi: 10.12153/j.issn.1674-991X.2019.05.070
Citation: XI Daoguo, ZHANG Ruibin, ZHOU Nai, CHEN Fan, ZU Baiyu, WANG Leyang. Characteristics of aluminum sludge composite filler and its application in constructed wetlands[J]. Journal of Environmental Engineering Technology, 2019, 9(5): 552-558. doi: 10.12153/j.issn.1674-991X.2019.05.070
shu

Characteristics of aluminum sludge composite filler and its application in constructed wetlands

doi: 10.12153/j.issn.1674-991X.2019.05.070
  • 1.

    Jiangsu Long-leaping Engineering Design Co. Ltd., Nanjing 210014, China

  • 2.

    Nanjing Ecological River Engineering Technology Research Center, Nanjing 210014, China

  • 3.

    Nanjing Rain-water Recycling Engineering Technology Research Center, Nanjing 210014, China

  • Received Date: 2018-12-06
  • Publish Date: 2019-09-20
    Abstract
  • Three kinds of aluminum sludge composite fillers, including aluminum sludge-zeolite, aluminum sludge-steel slag, aluminum sludge-zeolite-steel slag, were prepared by using aluminum sludge, steel slag and zeolite. The physical properties and isothermal adsorption properties of phosphorus were studied. The composite fillers were used in a pilot-scale constructed wetland system, and their purification effects on wetland water quality were discussed. The results showed that the three kinds of composite fillers had higher volume density, porosity and specific surface area compared with aluminum sludge and conventional wetland fillers. The adsorption effect on phosphorus was quite different, with the order as follows: aluminum sludge-steel slag>aluminum sludge-zeolite> aluminum sludge-zeolite-steel slag. The removal rate of CODCr was about 70% in constructed wetland which revealed no significant differences. The removal rate of TP, TN and NH3-N were significantly different; the removal rate of aluminum sludge-steel slag and aluminum sludge-zeolite on TP was higher (above 93%), while that of aluminum sludge-zeolite, aluminum sludge-zeolite-steel slag on TN and NH3-N was higher (TN above 65% and NH3-N 77%). The aluminum sludge-zeolite composite filler had the best comprehensive removal effect on pollutants in constructed wetlands, and the effluent quality of constructed wetlands could reach level A of Pollutant Discharge Standard for Urban Sewage Treatment Plants (GB 18918-2002).

     

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