Competition Of Oxygen And Electrons In The Simultaneous Biodegradation Of Phenol And Quinoline

At present,due to the rapid development of social economy,there existlarge amounts of refractory organic mattersin daily life which are difficult to biodegrade and are toxic to the ecological environment.These substances are characterized by permanently retainingand wide pollution,resulting in a series of environmental problems.The ecological environment and human health constitutes a serious threat.This study chose the typical toxic refractory organic pollutants: phenol and quinoline.Phenol is commonly used in modern chemical industry production of raw materials.Phenol has active chemical properties and stability of the benzene ring structure,phenol pollution has become a difficult degradation of residues in the environment,toxic and harmful pollutants.Quinoline,a kind of aromatic compounds,is a kind of typical nitrogen heterocyclic compound.Its molecular structure is made up of a benzene ring and a pyridine ring.Ifquinoline,which has high biological toxicity,enters the body,it will lead to teratogenic,carcinogenic,mutagenic effects.And with the wide use of quinoline this kind of chemical raw materials are detected in many parts of the soil,surface water and groundwater.Therefore,the treatment methods and related academic research of wastewater containing phenol and quinoline are becoming more and more important.This study deployed a new type of vertical flow baffle biofilm reactor(the vertical baffled bioreactor,VBBR)respectively for phenol and quinoline biodegradation,focusing on the acceleration of dissolved oxygen and electronics during the biodegradation process of phenol and quinoline.How the electronics accelerate the biodegradation rate of phenol and quinoline by Monod and Aiba dynamics models to explore.The main results were as follows:1.When30 ?,pH = 7.0,the DO value among 5.0-6.0 mg/L,catechol were observed in the process of phenol biodegradation;in the quinoline biodegradation process,there are 2 – hydroxyquinoline detected.Intermediates of phenol can be detected only in phenol and quinolinesimultaneous biodegradation;While 2-hydroxyquinoline were detected in the process of quinoline intermediate both in quinoline alone biodegradation and simultaneous biodegradation.2.Under the condition of 30 ?,pH = 7.0,the DO value of 5.0 to 6.0 mg/L,the dissolved oxygen and electronics is the main limiting factors in phenol and quinoline biodegradation.Adding different concentration of exogenous electron donor has a promoting effect on the biodegradation rate of phenol,quinolone.When setting different concentrations of dissolved oxygen,biological degradation rates of phenol,quinoline have different degree of promoting function.Within the concentration range of 0 ~ 6.0 mg/L of the dissolved oxygen,phenol and quinoline biodegradation rate increases with the increase of dissolved oxygen concentration in the reaction system.3.Phenol and quinoline biodegradation kinetics study are carried out respectively.Separate biodegradation of phenol and quinoline biodegradation conform with the Monod dynamics model,whileboth phenol and quinoline biodegradation conform to Aiba dynamics modelin simultaneous biodegradation.The dynamics research provides scientific explanation for the acceleration of electron in biodegradable process.