摘要
以通过共代谢方式对3-苯氧基苯甲酸具有较强生物降解能力的米曲霉M-4为实验菌株,考察了碳源对该菌株降解3-苯氧基苯甲酸的影响,分析了该菌株降解3-苯氧基苯甲酸的动力学特征。结果表明,淀粉、葡萄糖、果糖、核糖和琥珀酸均利于共代谢过程中米曲霉M-4的生长;当适宜碳源葡萄糖的添加量为5.0 g/L时,该菌株在4 d时可完全降解含量为100μg/mL的3-苯氧基苯甲酸,其降解速率常数(k)和半衰期(T_(1/2))分别为6.13 d^(-1)和2.32 d。
In this study, Aspergillus oryzae M-4 with high biodegradation capacity on 3-phenoxybenzoic acid was used. Effects of carbon sources on 3-phenoxybenzoic acid degradation by the strain in cometabolism way were investigated, and the kinetics of 3-phenoxybenzoic acid degradation was analyzed. The results showed that starch, glucose, fructose, ribose and succinic acid all accelerated the growth of the strain in the process of co-metabolism, of which glucose was its suitable carbon source. At 5.0 g/L of glucose, the strain could completely remove 100 μg/mL of 3-phenoxybenzoic acid on the fourth day, and the rate constant（k） and half-life（T1/2） of 3-phenoxybenzoic acid degradation were 6.13 d^-1 and 2.32 d, respectively.
出处
《食品科技》
CAS
北大核心
2016年第8期19-23,共5页
Food Science and Technology
基金
国家自然科学基金项目(31371775)
关键词
3-苯氧基苯甲酸
生物降解
米曲霉M-4
碳源
共代谢
3-phenoxybenzoic acid
biodegradation
Aspergillus oryzae M-4
carbon sources
cometabolism
