电催化臭氧耦合BAC工艺对污水中卡马西平去除和微生物群落影响

doi:10.19965/j.cnki.iwt.2023-0923

摘要/Abstract

摘要：

以我国南方某市政污水处理厂二沉池出水为研究对象，通过搭建电催化臭氧+生物活性炭（E-H₂O₂/O₃-BAC）为核心工艺的一体化中试系统，评估了系统中高级氧化段和BAC段对癫痫药物卡马西平的降解效果，进一步对不同工艺段出水的细菌群落组成进行了分析。结果表明，单独O₃工艺和E-H₂O₂/O₃工艺对卡马西平的去除率分别为95%和90%，经BAC处理后，卡马西平去除率均可达到99%以上。砂滤出水中检测到的条件致病菌属主要包括弓形杆菌属（Arcobacter）、Pseudarcobacter、拟杆菌属（Bacteroides）、嗜肺军团菌（Legionella）和黄杆菌属（Flavobacterium），多种菌属在不同工艺处理后相对丰度发生显著变化（p<0.05）。E-H₂O₂/O₃-BAC处理技术虽然在致病菌杀菌效果上弱于O₃-BAC技术，但并未引起致病菌黄杆菌属的显著增加，相较于O₃-BAC技术更具有安全性。因此，E-H₂O₂/O₃-BAC深度处理工艺可作为一种有效的技术手段为污水处理厂新污染物的去除和出水微生物安全保障提供支撑，在废水深度处理领域具有良好的应用前景。

关键词: 臭氧, 双氧水, 生物活性炭, 微生物群落, 深度处理

Abstract:

This study focused on the effluent from the secondary sedimentation tank of a municipal wastewater treatment plant in a southern city of China. The degradation effect of the advanced oxidation section and the bioactive carbon section of the system on the epileptic drug carbamazepine was evaluated by constructing an integrated pilot system with electrocatalytic ozonation+bioactivated carbon(E-H₂O₂/O₃-BAC) as the core process. The bacterial community compositions of effluent from the different sections of the process were further analyzed. The results showed that the removal efficiencies of carbamazepine by the individual O₃ process and the E-H₂O₂/O₃ process were 95% and 90%, respectively. After passing through the BAC stage, the removal efficiency of carbamazepine exceeded 99% for both processes. The predominant potentially pathogenic bacterial genera detected in the sand-filtered effluent included Arcobacter, Pseudarcobacter, Bacteroides, Legionella, and Flavobacterium. The relative abundances of these genera exhibited significant changes (p<0.05) after different treatment processes. Although the E-H₂O₂/O₃-BAC process was less effective in disinfecting pathogenic bacteria compared to the O₃-BAC process, it did not lead to a significant increase in the relative abundance of Flavobacterium. Therefore, the E-H₂O₂/O₃-BAC advanced treatment process could serve as an effective technique for the removal of emerging contaminants and microbial safety assurance in wastewater treatment plants. It showed great potential in the field of wastewater advanced treatment.

Key words: ozone, hydrogen peroxide, bioactivated carbon, microbial community, advanced treatment

中图分类号:

X172

陈子昂, 杨依婷, 迟茜, 杨晶晶, 夏广森, 展巨宏. 电催化臭氧耦合BAC工艺对污水中卡马西平去除和微生物群落影响[J]. 工业水处理, 2024, 44(9): 91-97.

Ziang CHEN, Yiting YANG, Qian CHI, Jingjing YANG, Guangsen XIA, Juhong ZHAN. Effect of electrocatalytic ozone coupled with bioactived carbon process on removal of carbamazepine and microbial community in wastewater[J]. Industrial Water Treatment, 2024, 44(9): 91-97.

https://www.iwt.cn/CN/Y2024/V44/I9/91

图/表 9

表1 二沉池出水水质

Table 1 Water quality of effluent from secondary sedimentation tank

指标

COD/

（mg·L^-1）

NH₃-N/

（mg·L^-1）

TP/

（mg·L^-1）

TN/

（mg·L^-1）

图1 E-H₂O₂/O₃-BAC中试系统工艺流程

Fig.1 E-H₂O₂/O₃-BAC pilot system process flow

表2 实验运行参数

Table 2 Experimental operating parameters

运行时间/d	运行参数
运行时间/d	O₃质量浓度/（mg·L^-1）	H₂O₂质量浓度/（mg·L^-1）
1~3	1.25
4~6	2.50
7~9	3.75
10~12	5.00
13~15	1.25	2.66
16~18	1.25	1.77
19~21	1.25	0.89
22~24	2.50	2.66
25~27	2.50	1.77
28~30	2.50	0.89

表3 样品编号

Table 3 Number of samples

取样点	样品编号	样品数量/个
进水	A	20
O₃	B1	8
E-H₂O₂/O₃	B2	12
O₃-BAC	C1	8
E-H₂O₂/O₃-BAC	C2	12

图2 O₃-BAC和E-H₂O₂/O₃-BAC系统对卡马西平去除效果

Fig.2 Removal effect of carbamazepine in O₃-BAC and E-H₂O₂/O₃-BAC system

图3 各样品在门（a）和纲（b）水平上细菌群落组成

Fig.3 Bacterial community of each sample at phylum level（a） and class level（b）

图4 各组样品中属水平上优势菌种的相对丰度

Fig.4 Bacterial community of each sample at genus level

表4 各组Alpha多样性指数平均值

Table 4 Mean value of Alpha diversity index for each group

样品编号	取样点	Alpha多样性指数
样品编号	取样点	Shannon	Simpson	Chao1	Coverage
A	进水	5.818	0.013	1 618	0.996
B1	O₃	5.172^***	0.030^**	1 219*	0.998
B2	E-H₂O₂/O₃	6.006	0.009	1 685	0.996
C1	O₃-BAC	6.114^***	0.008^***	1 723**	0.997
C2	E-H₂O₂/O₃-BAC	6.176	0.008	1 833	0.997

图5 基于ASV水平的PCoA分析

Fig.5 PCoA analysis at ASV level

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