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.
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 bateh-reeirculation, 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 bioreaetor continuous flow experiments, the overall removal rate was about 95.5% for an initial concentration of 100 mg·mL^-1 phenol and an HRT of 9.5 hours.
出处
《环境科学学报》
CAS
CSCD
北大核心
2009年第5期944-948,共5页
Acta Scientiae Circumstantiae
基金
浙江省自然科学基金项目(No.Y505247)~~
关键词
固定化微生物
镰刀菌
苯酚
膨润土凝胶
immobilized microorganism
Fusarium sp.
phenol
bentonite gel
