Glucose and Valuable Chemicals Production from Cotton Waste Using Hydrothermal Method
Glucose and Valuable Chemicals Production from Cotton Waste Using Hydrothermal Method
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DOI：
10.1007/s12649-017-0084-x
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发表时间：
2017-09
影响因子：
3.2
通讯作者：
C. Sasaki;Ami Kiyokawa;C. Asada;Y. Nakamura
中科院分区：
文献类型：
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作者：
C. Sasaki;Ami Kiyokawa;C. Asada;Y. Nakamura
为探索棉花废料的有效利用途径，采用蒸汽爆破和微波辅助处理技术对毛巾直接水解制葡萄糖进行了研究。通过直接水解的最大葡萄糖产率（基于未处理的毛巾）为18.8%，在5.5MPa的蒸汽压力（在271 °C下）和使用蒸汽爆破的5分钟的汽蒸时间下获得。对于微波辅助处理，使用1.0（w/w）%硫酸催化剂，在200 °C的微波加热温度下7分钟获得的通过直接水解的最大葡萄糖产率为28.9%。最大总葡萄糖产率（来自经处理的残余物的直接水解和酶促水解两者）为78.0%，在200 °C的微波加热温度下用0.5（w/w）%硫酸催化剂加热7分钟获得。此外，在200 °C的加热温度下用0.5（w/w）%的硫酸催化剂加热10分钟，实现了最大的总葡萄糖和有价值的水溶性化学物质（纤维二糖、5-羟甲基糠醛、甲酸和乙酰丙酸），94.1%。最后，以发酵上清液（含葡萄糖）和微波处理残渣（200 ℃，0.25%（w/w）硫酸催化剂）为碳源，对酵母菌发酵抑制较小，乙醇转化率可达84.5%。
Direct hydrolysis of a towel to glucose was investigated using steam explosion and microwave-assisted treatment to find effective uses for cotton waste. The maximum glucose yield by direct hydrolysis (based on an untreated towel) was 18.8%, obtained at a steam pressure of 5.5 MPa (at 271 °C) and steaming time of 5 min using steam explosion. For the microwave-assisted treatment, with a 1.0 (w/w)% sulfuric acid catalyst, the maximum glucose yield by direct hydrolysis was 28.9%, obtained at a microwave heating temperature of 200 °C for 7 min. The maximum total glucose yield (from both direct hydrolysis and enzymatic hydrolysis of treated residue) was 78.0%, attained at a microwave heating temperature of 200 °C for 7 min with 0.5 (w/w)% sulfuric acid catalyst. Furthermore, the maximum total glucose and valuable water soluble chemicals (cellobiose, 5-hydroxymethylfurfural, formic acid, and levulinic acid), 94.1%, were achieved at heating temperature of 200 °C for 10 min with 0.5 (w/w)% sulfuric acid catalyst. Finally, ethanol, 84.5% of conversion rate, could be produced using supernatant (it contained glucose) and microwave treated residue (200 °C for 7 min with 0.25 (w/w)% sulfuric acid catalyst) as carbon source forSaccharomyces cerevisiaewith less fermentation inhibition.