Acid Hydrolysis of the Waste Composts of Oyster Mushroom

느타리버섯 폐상퇴비(廢床堆肥)의 산가수분해(酸加水分解)

Chemical composition and condition of acid hydrolysis of waste composts during the cultivation of oyster mushroom (Pleurotus ostreatus) were determined. Ash content of composts increased while organic matter content decreased as the cultivation progressed. More than 90% of mushroom was produced from the first and second cropping period. An optimum condition for acid hydrolysis was at 2.0% $H_{2}SO_{4},\;1.5kg/cm^{2}$ vapor pressure for 30min and 20times (acid/compost). Formation of furfural in acid hydrolysis increased remarkably as acid concentration increased.

느타리버섯 재배기간(栽培期間)중 각(各) 주기별(週期別)로 채취(採取)한 퇴비(堆肥)의 화학성분(化學成分)과 산가수분해조건(酸加水分解條件)을 검토(檢討)한 결과 퇴비(堆肥)의 화학성분(化學成分)중에서 회분량(灰分量)은 재배기간(栽培期間)중에 증가(增加)되었으나 유기물(有機物)은 감소(減少)되었으며 버섯의 수량(收量)은 90% 이상이 1,2주기(週期)에서 얻어졌다. 산가수분해(酸加水分解)의 최적조건(最適條件)은 $H_{2}SO_{4}$ 2.0%, 증기압(蒸氣壓) $1.5kg/cm^{2}$, 분해시간(分解時間) 30분(分), 산첨가량(酸添加量) 20배량(倍量)에서 가장 양호하였다. furfural의 함량(含量)은 산농도(酸濃度)의 증가(增加)에 따라 현저하게 증가(增加)되었다.