超重力强化高铁酸盐与臭氧协同处理有机废水

发布时间：2018-04-28 09:48

本文选题：高铁酸钾 + 臭氧　；参考：《北京化工大学》2015年硕士论文

【摘要】：酚类有机废水是石化行业广泛存在的一种难处理废水,随着国家环保要求的日趋严格,相关行业迫切需要针对酚类废水的高效处理技术进行开发研究。据此,本文开展了超重力强化高铁酸盐与臭氧协同处理苯酚废水的研究,结合臭氧高级氧化工艺和高铁酸钾强氧化能力以及超重力强化传质的优点。本文首先通过一系列对比试验,验证了与亚铁离子相比高铁酸钾与臭氧具有更好的耦合作用,选取O3+Fe(VI)体系对比O3体系以及O3/H2O2+Fe(VI)体系对比O3/H2O2体系来研究高铁酸钾和高级氧化工艺联用的效果,并验证了超重力旋转床中03、O3+Fe(VI)、O3/H2O2、 O3/H2O2+Fe(VI)体系的处理效果均好于烧杯实验中的处理效果。主要研究成果如下：(1)RPB中O3+Fe(VI)体系对比03体系处理苯酚废水。高铁酸钾的用量存在最优值0.42mM,溶液的苯酚降解率和COD降解率随pH和气体流量的上升而上升,随液体流量和温度的上升而下降,苯酚降解率随转速的增加一直增加,COD降解率随着转速的增加先升高后降低,并且在所有实验条件下O3+Fe(VI)体系的降解效果均优于03体系。(2)RPB中O3/H2O2+Fe(VI)体系对比03/H202体系处理苯酚废水。溶液的苯酚降解率和COD降解率随pH的上升而上升,随着气液比、温度的上升先上升后下降,在试验范围内存在最优点,随着转速的上升苯酚降解率一直上升,COD降解率先上升后降低,并且在所有实验条件下O3/H2O2+Fe(VI)体系的降解效果均优于O3/H2O2体系。(3) O3+Fe(VI)体系的B/C值高于03体系,O3/H2O2+Fe(VI)体系的B/C值高于03/H202体系,说明高铁酸钾联合臭氧高级氧化处理废水,有利于处理后苯酚废水的生化处理,且B/C值随着pH、转速的升高而升高。(4)在极短反应时间内苯酚去除率达到99.81%,高铁酸钾和苯酚用量比为2：5。与前人的工作相比,本文在苯酚浓度大幅提高的基础上,高铁酸钾的用量显著减小,处理时间大大缩短,表明超重力强化高铁酸盐与臭氧协同处理苯酚废水具有良好的效果和很高的效率,为一种具有发展前景的有机废水处理技术。
[Abstract]:Phenolic organic wastewater is a kind of refractory wastewater widely existing in petrochemical industry. With the increasingly stringent requirements of national environmental protection, the related industries urgently need to develop and study the high-efficient treatment technology of phenolic wastewater. Based on this, a study on the synergistic treatment of phenol wastewater with hypergravity enhanced ferrate and ozone was carried out, combining the advantages of advanced ozonation process, strong oxidation capacity of potassium ferrate and enhanced mass transfer by hypergravity. In this paper, a series of comparative experiments show that potassium ferrate has better coupling with ozone than ferrous ion. The effect of combining potassium ferrate with advanced oxidation process was studied by comparing O 3 Feo Vi) system with O 3 system and O3/H2O2 Fe Li system with O3/H2O2 system. The results show that the treatment effect of the system of 03o 3 Feo 3 O 3 / H 2O 2, O3/H2O2 Fev I) in the high gravity rotating bed is better than that in the beaker experiment. The main research results are as follows: O 3 FeFeVI system in RPB is compared with 03 system to treat phenol wastewater. The optimum value of potassium ferrate was 0.42mM.The degradation rate of phenol and COD increased with the increase of pH and gas flow rate, and decreased with the increase of liquid flow rate and temperature. The degradation rate of phenol increased with the increase of rotational speed. The degradation rate of phenol increased first and then decreased with the increase of rotational speed, and the degradation effect of O3 FeFeVI) system was better than that of 03/H202 system compared with that of 03/H202 system under all experimental conditions. The degradation rate of phenol and COD increased with the increase of pH. With the ratio of gas to liquid, the temperature rose first and then decreased. With the increase of rotational speed, the degradation rate of phenol has been increasing, and the degradation rate of COD has been increased first and then decreased. Under all experimental conditions, the degradation effect of O3/H2O2 Fetivi) system was better than that of O3/H2O2 system. The B / C value of the system was higher than that of 03/H202 system, which indicated that potassium ferrate combined with ozone advanced oxidation treatment of wastewater was higher than that of the system of 03 / O _ 3 / H _ 2O _ 2 Fev _ (VI) system. The B / C value increased with the increase of pH and rotational speed. The removal rate of phenol reached 99.81% in very short reaction time, and the ratio of potassium ferrate to phenol was 2: 5. Compared with the previous work, the amount of potassium ferrate was significantly reduced and the treatment time was greatly shortened on the basis of the significant increase of phenol concentration. The results show that the synergistic treatment of phenol wastewater by hypergravity enhanced ferrate and ozone has good effect and high efficiency. It is a promising organic wastewater treatment technology.
【学位授予单位】：北京化工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X703

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