• Title/Summary/Keyword: advanced characterization

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The Present Status of Standard Sludge Characterization Method (슬러지 성상평가방법의 표준화 현황)

  • Kim, Tak-Hyun;Park, Chul-Hwan;Kim, Sang-Yong
    • Clean Technology
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    • v.13 no.2
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    • pp.87-98
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    • 2007

  • As the interest in environmental problems increased, the guideline of effluent qualities becomes strict and the amount of sludge produced from the wastewater treatment facilities steeply increased. The revised Korean acts prohibit the direct reclamation of the sludge exhausted in sewage treatment works from 2003, and the ocean dump of sludge will be also prohibited from 2012. Therefore, the sludge must be recycled, incinerated or composted. To properly perform the utilization and disposal operations, the establishment of well-defined procedures for the characterization of sludge by physical, chemical and biological method and setting up of guidelines for different treatment and disposal routes has become necessary. However, there have not been such standardized methods for sludge characterization in Korea. This review analyzes the present status of establishment and problems of sludge characterization method of Korea. Finally, it was proposed total 15 items of standardized characterization methods suitable to our country for proper sludge recycling and disposal, which was based on the more systematic standard methods of Germany (DIN 38414) and those of advanced nations.

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Review on Characterization Method and Recent Research Trend about Metal Powder for Powder Bed Fusion (PBF) Process (금속 Powder Bed Fusion(PBF) 공정용 분말의 특성평가 방법 및 관련 연구 동향)

  • Lee, Bin;Kim, Dae-Kyeom;Kim, Young Il;Kim, Do Hoon;Son, Yong;Park, Kyoung-Tae;Kim, Taek-Soo
    • Journal of Powder Materials
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    • v.27 no.6
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    • pp.509-519
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    • 2020

  • A well-established characterization method is required in powder bed fusion (PBF) metal additive manufacturing, where metal powder is used. The characterization methods from the traditional powder metallurgy process are still being used. However, it is necessary to develop advanced methods of property evaluation with the advances in additive manufacturing technology. In this article, the characterization methods of powders for metal PBF are reviewed, and the recent research trends are introduced. Standardization status and specifications for metal powder for the PBF process which published by the ISO, ASTM, and MPIF are also covered. The establishment of powder characterization methods are expected to contribute to the metal powder industry and the advancement of additive manufacturing technology through the creation of related databases.

  • https://doi.org/10.4150/KPMI.2020.27.6.509 인용 PDF KSCI