Lumping kinetics of ABE fermentation wastewater treatment by oleaginous yeast Trichosporon cutaneum
Lumping kinetics of ABE fermentation wastewater treatment by oleaginous yeast Trichosporon cutaneum
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DOI：
10.1080/10826068.2017.1342268
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发表时间：
2017-07
影响因子：
2.9
通讯作者：
Can Wang;Chao Huang;Xue-fang Chen;Hai-rong Zhang;L. Xiong;Xiao-mei Li;Hai-jun Guo;Gao-xiang Qi;Xiaoqing Lin;Xin-de Chen
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文献类型：
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作者：
Can Wang;Chao Huang;Xue-fang Chen;Hai-rong Zhang;L. Xiong;Xiao-mei Li;Hai-jun Guo;Gao-xiang Qi;Xiaoqing Lin;Xin-de Chen
摘要建立了不同发酵温度下产油酵母皮肤毛孢霉生物处理丙酮-丁醇-乙醇(ABE)发酵废水的集总动力学模型。与高温(33℃，306K)和低温(23℃，296K)相比，中温(28℃，301K)有利于发酵前期的细胞生长和化学需氧量(COD)的降解，但对最终酵母生物量和COD的去除影响不大。通过集总法将生物转化网络中的物质分为五个块(COD、脂类、多糖、其他胞内产物、其他胞外产物)，模型的9个速率常数(K1-K9)可以很好地解释生物转化规律。这种生物转化的吉布斯自由能(G)为正，表明它不可能自发发生，但酵母菌的存在可以在化学平衡后使生物转化成为可能。综上所述，初步证明了利用集总动力学来阐明皮肤霉菌生物处理ABE发酵废水中物质转化规律的可能性，该方法具有很大的应用潜力。
ABSTRACT Lumping kinetics models were built for the biological treatment of acetone–butanol–ethanol (ABE) fermentation wastewater by oleaginous yeast Trichosporon cutaneum with different fermentation temperatures. Compared with high temperature (33°C, 306 K) and low temperature (23°C, 296 K), medium temperature (28°C, 301 K) was beneficial for the cell growth and chemical oxygen demand (COD) degradation during the early stage of fermentation but the final yeast biomass and COD removal were influenced little. By lumping method, the materials in the bioconversion network were divided into five lumps (COD, lipid, polysaccharide, other intracellular products, other extracellular products), and the nine rate constants (k1–k9) for the models can well explain the bioconversion laws. The Gibbs free energy (G) for this bioconversion was positive, showing that it cannot happen spontaneous, but the existence of yeast can after the chemical equilibrium and make the bioconversion to be possible. Overall, the possibility of using lumping kinetics for elucidating the laws of materials conversion in the biological treatment of ABE fermentation wastewater by T. cutaneum has been initially proved and this method has great potential for further application.