유기물자원화 (Journal of the Korea Organic Resources Recycling Association)

  • 제20권2호
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  • Pages.36-43
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  • 2012
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  • 1225-6498(pISSN)
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  • 2508-3015(eISSN)
유기성자원학회 (Korea Organic Resources Recycling Association)
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볏짚의 가수분해과정중 유기산 생성 특성

Characteristics of Volatile Fatty Acids Release During the Hydrolysis of Rice Straw

  • 홍승길 (농촌진흥청 국립농업과학원) ;
  • 신중두 (농촌진흥청 국립농업과학원) ;
  • 허정욱 (농촌진흥청 국립농업과학원) ;
  • 박우균 (농촌진흥청 국립농업과학원) ;
  • 신현선 (농촌진흥청 국립농업과학원)
  • Hong, Seung-Gil (National Academy of Agricultural Science, Rural Development Administration) ;
  • Shin, JoungDu (National Academy of Agricultural Science, Rural Development Administration) ;
  • Heo, Jeong-Wook (National Academy of Agricultural Science, Rural Development Administration) ;
  • Park, Woo-Kyun (National Academy of Agricultural Science, Rural Development Administration) ;
  • Shin, Hyun-Seon (National Academy of Agricultural Science, Rural Development Administration)
  • 발행 : 2012.06.30
⟨ 이전 논문 다음 논문 ⟩

초록

농업 바이오매스를 혐기소화 시스템에 투입 가능성 여부를 구명하기 위해, 생산량이 가장 많은 볏짚을 원료로 하여 전처리에 따른 볏짚의 가수분해과정에서 휘발성유기산(VFAs)의 변화 특성을 조사하였다. 전처리는 3 cm 절단과 분쇄, $35^{\circ}C$와 $55^{\circ}C$, 알카리 처리, 교반속도 등을 조사하였다. 총 휘발성유기산(TVFAs)의 농도는 가수분해 시간이 경과하면서 증가하였다. 볏짚의 크기에서는 분쇄한 시료가 3cm 절단 시료에 비해 분쇄한 시료에서 TVFAs의 농도가 높게 나타났으며, 알칼리를 처리한 시료는 처리전에 비해 3배 증가하는 것으로 나타났다. 교반속도별로는 온도에 따라 다르게 나타났는데 $35^{\circ}C$에서는 150 rpm이, $55^{\circ}C$에서는 80rpm과 200 rpm에서 TVFAs의 농도가 높게 관측되었다. 전체적으로는 TVFAs중에서 acetic acid가 대부분이었으며, TVFAs와 유사한 증감경향을 보였다. 섬유소의 변화는 셀룰로스와 헤미셀룰로스가 약간 감소하였으나, 리그닌은 변화가 없는 것으로 나타났다.

Objective of this study was to investigate the effects of pre-treatment of rice straw by sizes(3cm, milled), temperatures($35^{\circ}C\;and\;55^{\circ}C$), with/without NaOH treatment, and RPM on the characteristics of volatile fatty acids production. The concentration of total volatile fatty acids (TVFAs) was increased with the hydrolyzed time. Concentration of VFAs in milled rice straw was higher than that in 3 cm cut. With the alkali treatment, the concentration of TVFAs were sharply increased, which showed 3 times higher than non-treatment. Concentration of VFAs was high at 150 rpm at $35^{\circ}C$, and at 80rpm and 200 rpm at $55^{\circ}C$. Among them acetic acid was dominant, which showed the similar increase with TVFAs. It was also observed that in the case of fibrous material, the contents of cellulose and hemi-cellulose were reduced a little, but no change in lignin.

키워드

참고문헌

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