Investigation of Nitrogen and Phosphorus Recovery from Swine Wastewater by Struvite Crystallization

DOI IR (HANDLE) Open Access
  • KY Nguyen Minh
    PhD Program in Maritime Science and Technology, National Kaohsiung University of Science and Technology (NKUST) Faculty of Environment and Natural Resources, Nong Lam University
  • NHUT Huynh Tan
    Faculty of Environment and Natural Resources, Nong Lam University
  • HIEP Nguyen Trung
    Research Institute for Sustainable Development, Ho Chi Minh City University of Natural Resources and Environment
  • LAP Bui Quoc
    Faculty of Chemistry and Environment, Thuyloi University
  • HUNG Nguyen Tri Quang
    Faculty of Environment and Natural Resources, Nong Lam University
  • LIN Chitsan
    Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology (NKUST)
  • TAM Tran Thi Minh
    Faculty of Environment and Natural Resources, Nong Lam University
  • OZAKI Akinori
    Institute of Tropical Agriculture Kyushu University

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Description

Swine wastewater is one of the environmental issues that negatively effect on the ecosystem and human health. Developing advanced technologies to treat and recover nutrients from swine wastewater have attracted the attention of scientists. This study investigated the simultaneous removal of nitrogen (N) and phosphorus (P) from swine wastewater by a magnesium ammonium phosphate hexahydrate (struvite, MgNH_4PO_4.6H_2O) crystallization process. The optimal condition for precipitation of struvite was determined at pH 9.0, and Mg^2+: NH_4 +: PO_4^3– ratio of 1.6:1:1.5, and reaction time of 30 minutes, the maximum removal of N and P reached 98.1 ± 0.5% and 98.9 ± 0.4%, respectively. The highest crystallization mass was obtained at 14.6 ± 0.6 gπ. In addition, characterization of struvite crystal was performed by X–ray diffraction (XRD), morphology, and chemical composition of struvite produced at optimal conditions as analyzed via SEM–EDS. Also, the economic analysis indicated that the struvite crystallization process is cost–feasible and friendly – environmental. These findings illustrated that struvite precipitation is an efficient method for removing both N and P in actual swine wastewater. This paper demonstrates the novel advantages of green technology, contributing to environmental protection towards sustainable development.

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Details 詳細情報について

  • CRID
    1390010292768806912
  • NII Book ID
    AA00247166
  • DOI
    10.5109/4772412
  • HANDLE
    2324/4772412
  • ISSN
    00236152
  • Text Lang
    en
  • Article Type
    departmental bulletin paper
  • Data Source
    • JaLC
    • IRDB
    • Crossref
    • OpenAIRE

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