Journal of the Korean Society of Food Science and Nutrition (한국식품영양과학회지)

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Preparation of Calcium Lactate from Ostrich Egg Shell

타조알 껍질로부터 젖산칼슘의 제조

  • 고민경 (대구가톨릭대학교 식품공학과) ;
  • 노홍균 (대구가톨릭대학교 식품공학과)
  • Published : 2002.04.01
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Abstract

To effectively utilize ostrich egg shell as a calcium source, various conditions for preparation of calcium lactate from ashing powder (ashed for 15 min at 90$0^{\circ}C$) were evaluated. Optimal conditions involved treatment of ashing powder with 30 mL lactic acid solution at room temperature for 15 min with a CaO : lactic acid ratio (mol/mol) of 1:2. Calcium lactate contained 39.70% calcium comparable to that (40.98%) in ostrich egg shell. Solubility of calcium lactate, 97.7%, was considerably higher than those (0.58% and 3.43%, respectively) of ostrich egg shell and ashing powder, indicating that the former can be utilized more effectively as a calcium source than the two latter.

본 연구에서는 타조 사육농장으로부터 폐기물로 나오는 타조알 껍질을 부가가치가 높은 칼슘 자원으로 활용하고자, 타조알 껍질의 회화분으로부터 젖산칼슘을 효과적으로 제조할 수 있는 최적 조건을 검토하고 이들 제품의 품질을 조사 하였다. 젖산칼슘 제조시 최적조건으로, 젖산 용액의 농도는 CaO : 젖산의 몰 비가 1 : 2.00, 젖산용액의 양은 30 mL, 반응 온도와 시간은 실온에서 15분으로 간주되었다. 젖산칼슘의 품질을 검사한 결과, 무기질 성분으로 Ca 함량은 39.70%로 타조알 껍질(OES)의 Ca 함량 40.98%과 유사한 반면 그 외 무기질 성분은 K를 제외하고 모두 OES보다 상당히 감소하였다. 용해도는 젖산칼슘이 97.7%로 OES의 응해도 0.58%와 회화분의 용해도 3.43%에 비하여 월등히 높아, 젖산칼슘을 제조하여 이용하는 것이 칼슘제로서 의 이용률을 더욱 높일 수 있으리라 사료되었다.

Keywords

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