Research on the treatment of azithromycin pharmaceutical wastewater by electro-Fenton with three dimensional electrode

doi:10.19965/j.cnki.iwt.2023-0526

Abstract

Abstract:

A three-dimensional electrode electro-Fenton system was constructed using titanium coated ruthenium iridium electrode(RuO₂-IrO₂/Ti) as the anode, graphite as the cathode, and activated carbon as the particle electrode. The influencing factors of three-dimensional electrode electro-Fenton treatment of azithromycin pharmaceutical wastewater were studied, and the effects of activated carbon particle electrode type and dosage on treatment efficiency were systematically investigated. The optimal reaction conditions were determined by changing factors such as electrode spacing, pH, aeration intensity, electrolysis voltage, and reaction time. The results showed that the optimal process conditions were pH=3, electrolysis voltage of 15 V, aeration intensity of 1.0 L/min, electrode spacing of 7 cm, and the reaction time of 2 hours as the particle electrode was 3 mm column carbon, with mass concentration of 100 g/L. Under these conditions, the average COD removal rate of wastewater was 72.28%, and the B/C increased from the initial 0.086 to 0.312, which resulted in the optimal treatment effect. In addition, the influence of each factor on the treatment of azithromycin pharmaceutical wastewater by three-dimensional electrode electro-Fenton was pH>aeration intensity>electrolysis voltage>reaction time>electrode spacing.

Key words: azithromycin pharmaceutical wastewater, three-dimensional electrode, eleetro-Fenton, advanced oxidation

摘要：

以钛涂钌铱电极（RuO₂-IrO₂/Ti）为阳极，石墨为阴极，活性炭为粒子电极构建三维电极电Fenton体系，研究三维电极电Fenton处理阿奇霉素制药废水的影响因素，系统性考察活性炭粒子电极类型及投加量对处理效果的影响，并通过改变极板间距、pH、曝气强度、电解电压、反应时间等因素，确定最佳反应条件。进一步通过正交实验比较各因素影响程度大小，优化三维电极电Fenton处理阿奇霉素制药废水实验条件。结果表明，以3 mm柱碳作为粒子电极，当其投加质量浓度为100 g/L时，最佳工艺条件为pH=3、电解电压15 V、曝气强度1.0 L/min、极板间距7 cm、反应时间2 h。此条件下，废水COD平均去除率为72.28%，B/C由初始的0.086上升至0.312，处理效果达最优。此外，各因素对于三维电极电Fenton处理阿奇霉素制药废水效果的影响程度为pH>曝气强度>电解电压>反应时间>极板间距。

关键词: 阿奇霉素制药废水, 三维电极, 电Fenton, 高级氧化

CLC Number:

X703.1

Xiangyu FU, Yafeng LI. Research on the treatment of azithromycin pharmaceutical wastewater by electro-Fenton with three dimensional electrode[J]. Industrial Water Treatment, 2024, 44(6): 158-164.

傅翔宇, 李亚峰. 三维电极电Fenton处理阿奇霉素制药废水研究[J]. 工业水处理, 2024, 44(6): 158-164.

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URL: https://www.iwt.cn/EN/10.19965/j.cnki.iwt.2023-0526

https://www.iwt.cn/EN/Y2024/V44/I6/158

Figures/Tables 10

References 16

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序号	A（pH）	B（电解电压）/V	C（极板间距）/cm	D（曝气量）/（L·min^-1）	E（反应时间）/h	COD去除率/%
1	2	5	5	0.8	1	46.38
2	2	10	7	1.0	1.5	51.49
3	2	15	9	1.2	2	53.54
4	2	20	11	1.4	2.5	43.42
5	3	5	9	1.0	2.5	49.45
6	3	10	11	0.8	2	40.87
7	3	15	5	1.4	1.5	43.51
8	3	20	7	1.2	1	55.59
9	4	5	11	1.2	1.5	45.35
10	4	10	9	1.4	1	51.49
11	4	15	7	0.8	2.5	58.66
12	4	20	5	1.0	2	48.42
13	5	5	7	1.4	2	40.64
14	5	10	5	1.2	2.5	37.16
15	5	15	11	1.0	1	45.35
16	5	20	9	0.8	1.5	38.89
K1	199.83	181.82	184.80	175.47	183.47
K2	203.92	181.01	194.71	206.38	179.24
K3	189.42	201.06	191.64	193.37	198.81
K4	162.04	186.32	179.06	174.99	188.69
k1	49.95	45.45	46.20	43.86	45.86
k2	50.98	45.25	48.67	51.59	44.81
k3	47.35	50.26	47.91	48.34	49.70
k4	40.51	46.58	44.76	43.74	47.17
R	10.47	5.01	3.91	7.85	4.89

序号	A（pH）	B（电解电压）/V	C（极板间距）/cm	D（曝气量）/（L·min^-1）	E（反应时间）/h	COD去除率/%
1	2	5	5	0.8	1	46.38
2	2	10	7	1.0	1.5	51.49
3	2	15	9	1.2	2	53.54
4	2	20	11	1.4	2.5	43.42
5	3	5	9	1.0	2.5	49.45
6	3	10	11	0.8	2	40.87
7	3	15	5	1.4	1.5	43.51
8	3	20	7	1.2	1	55.59
9	4	5	11	1.2	1.5	45.35
10	4	10	9	1.4	1	51.49
11	4	15	7	0.8	2.5	58.66
12	4	20	5	1.0	2	48.42
13	5	5	7	1.4	2	40.64
14	5	10	5	1.2	2.5	37.16
15	5	15	11	1.0	1	45.35
16	5	20	9	0.8	1.5	38.89
K1	199.83	181.82	184.80	175.47	183.47
K2	203.92	181.01	194.71	206.38	179.24
K3	189.42	201.06	191.64	193.37	198.81
K4	162.04	186.32	179.06	174.99	188.69
k1	49.95	45.45	46.20	43.86	45.86
k2	50.98	45.25	48.67	51.59	44.81
k3	47.35	50.26	47.91	48.34	49.70
k4	40.51	46.58	44.76	43.74	47.17
R	10.47	5.01	3.91	7.85	4.89

次数	初始COD/（mg·L^-1）	初始B/C	剩余COD/（mg·L^-1）	处理后B/C	COD去除率/%
1	10 075.5	0.092	3 000.5	0.308	70.22
2	10 540.3	0.085	2 784.7	0.323	73.58
3	9 975.7	0.081	2 875.0	0.282	71.18
4	10 125.7	0.089	2 655.1	0.338	73.78
5	9 995.9	0.085	2 734.9	0.311	72.64
平均	10 142.6	0.086	2 810.0	0.312	72.28

次数	初始COD/（mg·L^-1）	初始B/C	剩余COD/（mg·L^-1）	处理后B/C	COD去除率/%
1	10 075.5	0.092	3 000.5	0.308	70.22
2	10 540.3	0.085	2 784.7	0.323	73.58
3	9 975.7	0.081	2 875.0	0.282	71.18
4	10 125.7	0.089	2 655.1	0.338	73.78
5	9 995.9	0.085	2 734.9	0.311	72.64
平均	10 142.6	0.086	2 810.0	0.312	72.28

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