摘要
为提高废水中苯酚的降解效率,利用微生物之间的协同作用将3种菌株进行复配,构建出能有效降解苯酚的复合菌群。首先,通过正交试验优化不同菌株的复配比。随后,探究复合菌群对初始质量浓度范围为400~1 400 mg/L的苯酚的降解过程,并首次提出选用Three-half-order模型描述复合菌群对苯酚降解的动力学。结果表明:相比单株菌,优化复配比后的复合菌群能够将苯酚的去除率提高至99.85%。相比一级动力学模型,Three-half-order模型对不同初始质量浓度苯酚的降解过程的预测更加准确。对苯酚的生物降解过程进行动力学建模,有助于了解苯酚降解过程中苯酚质量浓度变化的规律。
To improve the degradation efficiency of phenol in wastewater,mixed bacteria were constructed by using the synergistic effects among three bacterial strains.The proportion of strains was optimized with orthogonal experiment.Then the mixed bacteria were adopted to degrade phenol with an initial mass concentration ranging from 400 to 1400 mg/L.Meanwhile,Three-half-order model was proposed for the first time to describe the degradation kinetic of phenol.The results showed that the mixed bacteria with optimized composition and proportion were able to increase the degradation efficiency of phenol to 99.85%.Compared with first order kinetic model,Three-half-order model with fitted parameters brought better prediction of the degradation kinetics of phenol.This study pro-vides an insight into the biological degradation of phenol wastewater with mixed strains and its degradation kinetics.
作者
杨宗政
刘伟萌
吴志国
赵文立
YANG Zongzheng;LIU Weimeng;WU Zhiguo;ZHAO Wenli(College of Chemical Engineering and Materials Science,Tianjin University of Science&Technology,Tianjin 300457,China;Tianjin Key Laboratory of Brine Chemical Engineering and Resource Eco-utilization,Tianjin 300457,China)
出处
《生物学杂志》
CAS
CSCD
北大核心
2024年第3期98-102,共5页
Journal of Biology
基金
天津市科技计划项目(20YDTPJC01820)
国家自然科学基金青年项目(22108204)。
关键词
苯酚
生物降解
复合菌群
动力学
污水处理
phenol
biodegradation
mixed bacteria
kinetics
sewage treatment
