CMC-膨润土交联固定镰刀菌反应器对对氯苯酚废水的降解特性

4-Chlorophenol removal in a bioreactor using CMC-Bentonite gel immobilized Fusarium sp.

采用CMC-膨润土交联方法固定镰刀菌,研究了其固定方法对4-CP废水的降解效果,考察了固定化生物反应器间歇与连续运行处理4-CP废水的降解性能.结果表明,CMC-膨润土包埋固定镰刀菌对4-CP的降解速率最大;反应器间歇运行时,4-CP的降解率随其初始浓度增加而有所下降,浓度高于50 mg.L-1的4-CP降解过程基本上遵循零级反应动力学;当反应器连续运行12 h,停留时间6 h时,浓度50 mg.L-1的4-CP被完全降解.

An innovative CMC-bentonite gel immobilized Fusarium sp.was prepared and the removal rate of 4-chlorophenol by a bioreactor containing Fusarium sp.immobilized by various methods was investigated.The performance of the bioreactor was investigated at different hydraulic residence times（HRT） for various concentrations of 4-chlorophenol in wastewater,using both batch-recirculation and continuous flow operation.The 4-chlorophenol degradation rate for CMC-bentonite gel-immobilized Fusarium sp.was higher under the same conditions than three other tested immobilization methods and free cells.The removal rate decreased with increasing initial concentration of 4-chlorophenol in the bioreactor in batch-recirculation mode.A series of zero-order reaction equations are proposed to describe the biodegradation kinetics of 4-chlorophenol at high concentration in the bioreactor.In a series of bioreactor continuous flow experiments,the overall removal rate remained at about 100% after operation for 12 h with an initial concentration of 4-chlorophenol of 50 mg·L-1 and an HRT of 6 h.