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Removal of Nitrogen and Phosphorus from Wastewater Using Layered Filter Media

Author

Listed:
  • Aušra Mažeikienė

    (Department of Environmental Protection and Water Engineering, Faculty of Environmental Engineering, Vilnius Gediminas Technical University, 10223 Vilnius, Lithuania)

  • Julita Šarko

    (Department of Environmental Protection and Water Engineering, Faculty of Environmental Engineering, Vilnius Gediminas Technical University, 10223 Vilnius, Lithuania)

Abstract

After biological wastewater treatment, ammonium nitrogen (NH 4 -N), nitrate nitrogen (NO 3 -N), and phosphate phosphorus (PO 4 -P) remain in the effluent, which is discharged into natural water bodies. For further removal of these wastewater compounds, three selected materials were used as filter media: quartz sand used in drinking water treatment plants, Purolite A502PS resin, and natural zeolite. After placing all selected materials in the first filtration column (height of each layer-30 cm), the concentration of NH 4 -N in the wastewater was reduced by 5 times (from 8.22 to 1.5 mg/L), the concentration of NO 3 -N by 6 times (from 2.46 to 0.44 mg/L), and the concentration of PO 4 -P by 3 times (from 1.56 to 0.45 mg/L). The second column was without a Purolite A502PS layer, so the concentration of NO 3 -N in the filtrate from the second column was not reduced. The filtration columns were operated for about 2 months, and the filtration was stopped due to clogging with suspended solids (TSS) with an average concentration of 53.2 mg/L. The preliminary removal of TSS from wastewater before filtration through sorbents is recommended. The tested materials effectively treat wastewater of nitrogen (average efficiency 80–83%) or phosphorus (average efficiency 65–67%) and do not pollute the wastewater with environmentally hazardous substances, so they can be used in the development of tertiary wastewater treatment filters.

Suggested Citation

  • Aušra Mažeikienė & Julita Šarko, 2022. "Removal of Nitrogen and Phosphorus from Wastewater Using Layered Filter Media," Sustainability, MDPI, vol. 14(17), pages 1-10, August.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:17:p:10713-:d:900044
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    References listed on IDEAS

    as
    1. Hui Tang & Xiaoyi Xu & Bin Wang & Chenpei Lv & Dezhi Shi, 2020. "Removal of Ammonium from Swine Wastewater Using Synthesized Zeolite from Fly Ash," Sustainability, MDPI, vol. 12(8), pages 1-15, April.
    2. Xianping Luo & Qun Yan & Chunying Wang & Caigui Luo & Nana Zhou & Chensheng Jian, 2015. "Treatment of Ammonia Nitrogen Wastewater in Low Concentration by Two-Stage Ozonization," IJERPH, MDPI, vol. 12(9), pages 1-13, September.
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