International Journal of Industrial Entomology and Biomaterials

Korean Society of Sericultural Science (한국잠사학회)
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Effect of pulverizing method on the particle size of matured silkworm powder

  • Kim, Su-Bae (Department of Agricultural Biology, Sericultural & Apicultural Materials Division National Institute of Agricultural Science, Rural Development Administration Wanju-gun) ;
  • Kim, Kee-Young (Department of Agricultural Biology, Sericultural & Apicultural Materials Division National Institute of Agricultural Science, Rural Development Administration Wanju-gun) ;
  • Ji, Sang-Deok (Department of Agricultural Biology, Sericultural & Apicultural Materials Division National Institute of Agricultural Science, Rural Development Administration Wanju-gun) ;
  • Kim, Seong-Wan (Department of Agricultural Biology, Sericultural & Apicultural Materials Division National Institute of Agricultural Science, Rural Development Administration Wanju-gun) ;
  • Kim, Nam-Suk (Department of Agricultural Biology, Sericultural & Apicultural Materials Division National Institute of Agricultural Science, Rural Development Administration Wanju-gun) ;
  • Jo, You-Young (Department of Agricultural Biology, Sericultural & Apicultural Materials Division National Institute of Agricultural Science, Rural Development Administration Wanju-gun) ;
  • Kim, Jong-Gil (Department of Agricultural Biology, Sericultural & Apicultural Materials Division National Institute of Agricultural Science, Rural Development Administration Wanju-gun) ;
  • Kim, Young-Guk (Herbal Crop Research Division, Department of Herbal crop Research, National Institute of Horticultural and Herbal Science, Rural Development Administration Eumseong) ;
  • Koo, Hui-Yeon (Insect & Sericultural Research Institute, Jeollanamdo Agricultural Research and Extension Service) ;
  • Moon, Hyung-Chul (Agricultural Research and Extension Services Sericulture and Entomology Experiment Station) ;
  • Seok, Young-Seek (Gangwon Province Agricultural Product Registered Seed Station) ;
  • Lee, Hyun-Tai (Biopharmaceutical Engineering Major, Division of Applied Bioengineering, College of Engineering, Dong-eui University)
  • Received : 2018.08.28
  • Accepted : 2018.12.13
  • Published : 2018.12.31
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Abstract

Recently matured silkworm powder was developed by RDA. In this study, the effect of pulverizing method on the particle size of matured silkworm powder was examined. FESEM was performed to observe the morphology and to measure the particle size of silkworm powder. Particle morphology of air-jet mill pulverized powder was round and smooth, however, those of roller-mill and hammer-mill pulverized mature silkworm was more harsh and square. Particle size was varied with pulverizing technique as follows; $1.1{\mu}m$ (air-jet mill), $10{\mu}m$ (roller mill), and $120{\mu}m$ (hammer mill), respectively. A proximate analysis results of air-jet mill powder showed that crude protein, crude lipid, crude fiber, and ash was 73%, 12%, 1.95%, and 3.4%, respectively. According to our results, air-jet mell technique might be used to make a tiny matured silkworm powder.

Keywords

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Fig. 1. Photographs of pulverizing machine; hammer mill (a), hammer part of hammer mill (b), roller mill (c), roller part of rollermill (d), air-jet mill (e), inside appearance of air-jet mill (f).

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Fig. 2. Photographs of MS powder using field emission scanning electron microscope prepared by hammer-mill (A), roller-mill (B), and air-jet mill (c).

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Fig. 3. Average MS particle size prepared by hammer-mill, rollermill, and air-jet mill. Sample were analyzed by one-way ANOVA followed by DUNKAN test Different sample indicate significant differences at p < 0.01

Table 1. Optimal pulverization condition, pulverizing time, and loss ratio using roller-mill and air-jet mill.

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Table. 2. The proximate analysis of MS powder with different pulverization mathods. Sample were analyzed by one-way ANOVA followed by DUNKAN test Different letter a, b, c indicate significant differences at p < 0.05 (mean ± STDE, %).

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