污染控制技术及原理
李济吾,蔡伟建.基于膨润土凝胶固定镰刀菌反应器对苯酚废水的降解特性[J].环境科学学报,2009,29(5):944-948
基于膨润土凝胶固定镰刀菌反应器对苯酚废水的降解特性
- Phenol removal in a bioreactor using bentonite gel immobilized Fusarium sp.
- 基金项目：浙江省自然科学基金项目(No.Y505247)
- 作者
- 单位
- 李济吾
- 浙江工商大学环境科学与工程学院, 杭州 310035
- 蔡伟建
- 浙江工商大学食品与生物工程学院, 杭州 310035
- 摘要：采用新型膨润土凝胶将镰刀菌固定化,研究了镰刀菌不同固定方法处理苯酚废水的效果,考察了固定化微生物反应器间歇与连续运行处理不同苯酚浓度的降解性能.结果表明,膨润土凝胶吸附固定镰刀菌对苯酚的降解速率最大,速度常数达2.5882h-1;反应器间歇运行时,苯酚的降解率随初始苯酚浓度增加而有所下降,不同浓度的苯酚降解过程基本上遵循零级反应动力学;反应器串联连续运行条件下,停留时间为9.5h时,苯酚浓度100mg·mL-1的总降解率稳定在95.5%左右.
- Abstract：The removal rate of phenol in a bioreactor containing Fusarium sp.immobilized on an innovative bentonite gel by different methods was studied.The phenol degradation rate for Fusarium sp.immobilized on bentonite gel by absorption was maximal among four tested immobilization methods,giving a degradation rate constant of 2.5882 h-1.The performance of the bioreactor was investigated at different hydraulic residence times(HRT)for various concentrations of phenol in wastewater,using batch-recirculation and continuous flow processes.The removal rate decreased with the initial concentration of phenol in bioreactor on batch-recirculation,and a series of zero-order reaction equations are proposed to describe the kinetics of the biodegradation of phenol in this bioreactor.In a series of bioreactor continuous flow experiments,the overall removal rate was about 95.5% for an initial concentration of 100 mg·L-1 phenol and an HRTof 9.5 hours.
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