초미세습식분쇄공정의 공정변수에 따른 해조칼슘의 입자크기 분석

한민우¹, 윤광섭²^,^*

Preparation of Seaweed Calcium Microparticles by Wet-grinding Process and their Particle Size Distribution Analysis

Min-Woo Han¹, Kwang-Sup Youn²^,^*

¹경북해양바이오산업연구원

²대구가톨릭대학교 외식식품산업학부

¹Gyeongbuk Institute for Marine Bioindustry

²Department of Food Science and Technology, Catholic University of Daegu

^*Corresponding author: Kwang-Sup Youn, Department of Food Science and Technology, Catholic University of Daegu, 330, Geumnakri, Gyeongsan, Gyeongbuk 712-702, Korea, Tel: +82-53-850-3209; Fax: +82-53-850-3209, E-mail: ksyoun@cu.ac.kr

ⓒ Copyright 2009 Korean Society for Food Engineering. This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Received: Aug 03, 2009; Revised: Nov 08, 2009; Accepted: Nov 11, 2009

Published Online: Nov 30, 2009

Abatract

The main objective of this study was to establish optimum condition of wet-grinding process for manufacturing microparticulated seaweed calcium. Process parameters such as concentration of forming agent, rotor speed, bead size, feed rate, and grinding time were adapted during wet-grinding of seaweed calcium. The particle size range of the raw seaweed calcium was 10-20 μm. The calcium particles were reduced to under 1 μm as nano scale after grinding. Gum arabic was suitable for forming agent and 5%(w/v) concentration was the most effective in grinding efficiency. A wet-grinding process operated at 4,000 rpm rotor speed, 0,4 mm bead size, and 0.4 L/hr feeding rate, respectively, produced less than 600 mm(>>90%)-sized particles. In batch systems, 8 cycles of grinding showed higher efficiency, but 20 min of grinding time in continuous processing was more efficient to reduce particle size than the batch processing. Based on the result, the optimum conditions of the wet grinding process were established: operation time of 20 minutes, rotor speed of 4,000 rpm, bead size of 0.4 mm, feed rate of 40 mL/min and 30% mixing ration with water. The size of the resulting ultra fine calcium particles ranged between 40 and 660 mm.

Keywords: seaweed calcium; wet-grinding; particulated grind; nano-scale