Pilot-scale study on advanced treatment of secondary effluent from wastewater treatment plant by electrocatalytic oxidation

doi:10.19965/j.cnki.iwt.2021-0766

Abstract

Abstract:

To determine the effect of electrocatalytic oxidation on secondary effluent of wastewater plants and optimize the operation parameters， a continuous flow reactor was used by using secondary effluent of a sewage in Tianjin as raw water. The effects of plate type， number of plates， current density， plate spacing， and hydraulic retention time on the removal effects of COD， ammonia nitrogen， and total nitrogen were investigated by single factor experiments. The results showed that the effect of Ti/RuO₂electrode was better than that of Ti/RuO₂-IrO₂ electrode for the removal of COD and ammonia nitrogen. Increasing the number of plates could enhance the removal rate of organic pollutants. The optimized operating parameters of Ti/RuO₂ electrode were： current density of 10 mA/cm²， plate spacing of 8 cm， and hydraulic retention time of 2.75 h. Under the optimized conditions，the average removal rate of COD was 55.1%， average removal rate of ammonia nitrogen was 99.6%， and that of total nitrogen was 85.9%. The cost of electricity， plate loss and daily maintenance consumed by the system was ¥10.2 per ton of water under optimized operating conditions. It was speculated that the removal mechanism of ammonia nitrogen and COD was the combined action of active chlorine and ·OH.

Key words: electrocatalytic oxidation, secondary effluent, advanced treatment

摘要：

为确定电催化氧化对污水厂二级出水的处理效果及优化运行参数，采用连续流反应器，以天津市某污水厂二级出水为原水，通过单因素实验考察了极板类型、极板数量、电流密度、极板间距、水力停留时间对COD、氨氮、总氮去除效果的影响。结果表明：对于COD和氨氮的去除，钌钛电极的去除效果优于钌铱电极；增加极板数量可以强化有机污染物的去除率。采用钌钛电极的优化运行参数：电流密度10 mA/cm²，极板间距8 cm，水力停留时间2.75 h；在优化条件下运行时，COD平均去除率为55.1%，氨氮平均去除率为99.6%，总氮平均去除率为85.9%。综合系统消耗的电费、极板损耗费及日常维护等费用，优化运行条件下吨水运行成本为10.2元。推测氨氮及COD的去除机理为活性氯与·OH的共同作用。

关键词: 电催化氧化, 二级出水, 深度处理

CLC Number:

X703.1

Cheng LI, Hao ZHANG, Yue GU, Shaopo WANG. Pilot-scale study on advanced treatment of secondary effluent from wastewater treatment plant by electrocatalytic oxidation[J]. Industrial Water Treatment, 2022, 42(4): 113-118.

李诚, 张浩, 顾悦, 王少坡. 电催化氧化深度处理污水厂二级出水中试研究[J]. 工业水处理, 2022, 42(4): 113-118.

/ / Recommend / Download Citations

URL: https://www.iwt.cn/EN/10.19965/j.cnki.iwt.2021-0766

https://www.iwt.cn/EN/Y2022/V42/I4/113

Figures/Tables 7

Fig. 1 Electrocatalytic oxidation device

Table 1 Influence of plate type on pollutant removal effect

项目	氨氮去除率	总氮去除率	COD去除率	总磷去除率
钌钛电极	99.9±0.01	78.1±1.5	28.3±3.0	8.3±1.0
钌铱电极	99.9±0.02	79±1.9	20.4±2.0	9.0±1.2

Table 2 Influence of plate number on pollutant removal effect

项目	COD去除率	氨氮去除率	总氮去除率
2对极板	28.3±3.0	99.9±0	78.1±2.6
4对极板	64±4.2	98.4±0.1	70.0±2.2

Fig. 2 Influence of plate spacing on pollutant removal effect

Fig. 3 Influence of current density on pollutant removal effect

Fig. 4 Influence of hydraulic retention time on pollutant removal effect

Fig. 5 Pollutant removal effect under optimized operating conditions

References 17

1	王树涛，王虹，马军，等. 我国北方城市污水处理厂二级处理出水的水质特性［J］. 环境科学，2009，30（4）：1099-1104. doi:10.3321/j.issn:0250-3301.2009.04.027
	WANG Shutao， WANG Hong， MA Jun， et al. Analysis of the secondary effluent of municipal wastewater in North China［J］. Environmental Science， 2009， 30（4）： 1099-1104. doi:10.3321/j.issn:0250-3301.2009.04.027
2	胡承志，刘会娟，曲久辉. 电化学水处理技术研究进展［J］. 环境工程学报，2018，12（3）：677-696. doi:10.12030/j.cjee.201801179
	HU Chengzhi， LIU Huijuan， QU Jiuhui. Research progress of electrochemical technologies for water treatment［J］. Chinese Journal of Environmental Engineering， 2018， 12（3）： 677-696. doi:10.12030/j.cjee.201801179
3	张谊，黄健，丁元法，等. 电化学水处理技术的研究进展［J］. 广州化工，2020，48（15）：31-34. doi:10.3969/j.issn.1001-9677.2020.15.011
	ZHANG Yi， HUANG Jian， DING Yuanfa， et al. Research progress on electrochemical water treatment technology［J］. Guangzhou Chemical Industry， 2020， 48（15）： 31-34. doi:10.3969/j.issn.1001-9677.2020.15.011
4	刘峻峰，黄琳琳，李姗姗，等. 电催化氧化对制药废水二级出水的深度处理效能［J］. 环境工程学报，2016，10（11）：6269-6274. doi:10.12030/j.cjee.201507033
	LIU Junfeng， HUANG Linlin， LI Shanshan， et al. Deep treatment efficiency of electrochemical catalytic oxidation for secondary effluent pharmaceutical wastewater［J］. Chinese Journal of Environmental Engineering， 2016， 10（11）： 6269-6274. doi:10.12030/j.cjee.201507033
5	DAGHRIR R， DROGUI P， TSHIBANGU J. Efficient treatment of domestic wastewater by electrochemical oxidation process using bored doped diamond anode［J］. Separation and Purification Technology，2014，131：79-83. doi:10.1016/j.seppur.2014.04.048
6	MOREIRA F C， BOAVENTURA R A R， BRILLAS E，et al. Electrochemical advanced oxidation processes：A review on their application to synthetic and real wastewaters［J］. Applied Catalysis B：Environmental，2017，202：217-261. doi:10.1016/j.apcatb.2016.08.037
7	王立璇，马宏瑞，孟高飞，等. DSA电极催化氧化法处理制药废水的应用研究［J］. 工业水处理，2017，37（7）：35-38. doi:10.11894/1005-829x.2017.37(7).035
	WANG Lixuan， MA Hongrui， MENG Gaofei， et al. Study on the application of catalytic⁃oxidation process with DSA electrode to the treatment of pharmaceutical wastewater［J］. Industrial Water Treatment， 2017， 37（7）： 35-38. doi:10.11894/1005-829x.2017.37(7).035
8	李佳欣，陈野，韩洪军，等. 钛基PbO₂电极制备及其电催化处理煤化工废水［J］. 中国给水排水，2019，35（3）：111-116.
	LI Jiaxin， CHEN Ye， HAN Hongjun， et al. Preparation of Ti⁃based PbO₂ electrode and electrocatalytic oxidation of coal chemical wastewater［J］. China Water & Wastewater， 2019， 35（3）： 111-116.
9	岳琳，王启山，郭建博，等. 电催化氧化法去除垃圾渗滤液中的氨氮［J］. 工业水处理，2010，30（10）：52-55. doi:10.11894/1005-829x.2010.30(10).52
	YUE Lin， WANG Qishan， GUO Jianbo， et al. Removal of ammonia⁃nitrogen from landfill leachate by electro⁃catalytic oxidation process［J］. Industrial Water Treatment， 2010， 30（10）： 52-55. doi:10.11894/1005-829x.2010.30(10).52
10	李杰，李茁，李鹏，等. 三维电催化氧化法的研究进展与应用［J］. 应用化工，2020，49（12）：3221-3225. doi:10.3969/j.issn.1671-3206.2020.12.054
	LI Jie， LI Zhuo， LI Peng， et al. Research progress and application of three⁃dimensional electrocatalytic oxidation［J］. Applied Chemical Industry， 2020， 49（12）： 3221-3225. doi:10.3969/j.issn.1671-3206.2020.12.054
11	徐浩，乔丹，许志成，等. 电催化氧化技术在有机废水处理中的应用［J］. 工业水处理，2021，41（3）：1-9.
	XU Hao， QIAO Dan， XU Zhicheng， et al. Application of electro⁃catalytic oxidation technology in organic wastewater treatment［J］. Industrial Water Treatment， 2021， 41（3）： 1-9.
12	滕洪辉，高泽，韩丹丹，等. 三维电极电催化氧化技术处理工业废水研究进展［J］. 水处理技术，2020，46（4）：12-15.
	TENG Honghui， GAO Ze， HAN Dandan， et al. Research progress of industrial wastewater treatment by three⁃dimensional electrode electrocatalytic oxidation technology［J］. Technology of Water Treatment， 2020， 46（4）： 12-15.
13	朱琼芳，何家平. 电催化氧化处理电镀废水尾水的研究［J］. 辽宁化工，2020，49（7）：752-755. doi:10.3969/j.issn.1004-0935.2020.07.002
	ZHU Qiongfang， HE Jiaping. Application of electro⁃catalytic oxidation in treatment of electroplating wastewater tailwater［J］. Liaoning Chemical Industry， 2020， 49（7）： 752-755. doi:10.3969/j.issn.1004-0935.2020.07.002
14	冯壮壮，王海东，于建，等. 电催化氧化深度处理焦化废水的效果及能耗研究［J］. 工业水处理，2013，33（4）：61-64. doi:10.11894/1005-829x.2013.33(4).61
	FENG Zhuangzhuang， WANG Haidong， YU Jian， et al. Study on the efficacy and energy consumption of the advanced treatment of coking wastewater by electro⁃catalytic oxidation［J］. Industrial Water Treatment， 2013， 33（4）： 61-64. doi:10.11894/1005-829x.2013.33(4).61
15	王开红，岳琳，郭建博. 电催化氧化法处理染料废水的影响因素及动力学［J］. 环境工程学报，2012，6（8）：2640-2644.
	WANG Kaihong， YUE Lin， GUO Jianbo. Affecting factors and kinetics of dye wastewater treatment by electro⁃catalytic oxidation process［J］. Chinese Journal of Environmental Engineering， 2012， 6（8）： 2640-2644.
16	于丽花，薛娟琴，张立华，等. 操作条件对电氧化去除废水中有机污染物的影响研究［J］.环境工程，2017，35（5）：6-10.
	YU Lihua， XUE Juanqin， ZHANG Lihua， et al. Influences of electro⁃oxidation operating conditions on phenol degradation［J］. Environmental Engineering， 2017， 35（5）： 6-10.
17	王永祺. 电催化-电絮凝技术高效处理船舶生活污水的效能研究［D］. 哈尔滨：哈尔滨工程大学，2019.
	WANG Yongqi. Research on the efficiency of electrocatalysis-electroflocculation processing ship domestic sewage［D］. Harbin： Harbin Engineering University， 2019.

[1]	Yang LI, Dongfang ZHANG, Jixian LIU, Haosheng DU, Xiaojie WANG. Case study on the comprehensive advanced treatment of PCB electroplating wastewater [J]. Industrial Water Treatment, 2025, 45(3): 212-218.
[2]	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.
[3]	Zheng LIU, Long YANG, Zuoxu ZHOU, Lei ZHANG, Xunsheng JI. An advanced treatment project of wastewater from PA66 salt producted by butadiene process [J]. Industrial Water Treatment, 2024, 44(7): 185-189.
[4]	Yuhong ZHANG, Dunchao ZHANG, Xiulan SONG, Na HE. Advanced treatment of coking wastewater with peroxymonosulfate oxidation activated by base combined with SBBR [J]. Industrial Water Treatment, 2024, 44(6): 94-100.
[5]	Xufeng LI, Shaopo WANG, Yao ZHOU, Jing CHANG, Rongguang LI. Enhanced treatment technology for Yangtze River water in a water purification plant in Tianjin [J]. Industrial Water Treatment, 2024, 44(5): 132-140.
[6]	Qinqi FAN, Chun LIU, Situ MU, Jing ZHANG, Yankai GUO, Junjun MA. Operation performance of a pilot plant of microbubble ozonation and biological treatment for advanced treatment of chemical wastewater [J]. Industrial Water Treatment, 2024, 44(4): 120-126.
[7]	Chuchu LIU, Chunji JIN, Nan SUN, Mengchun GAO. Electrocatalytic degradation of reactive dyes in high sulfate wastewater by synergistic effect of anode and cathode [J]. Industrial Water Treatment, 2024, 44(4): 127-137.
[8]	Zeyi LI, Changsheng LIAO, Yun CHAI, Qinghong WANG, Yali ZHAN, Chunmao CHEN, Fayuan CHEN. Characteristics of biochemical tail water from coking wastewater and current progress in advanced treatment technologies [J]. Industrial Water Treatment, 2024, 44(3): 10-23.
[9]	Lin HAN, Yongming CHENG, Dongmei WANG, Yajuan LI, Jie ZHANG. Problem diagnosis and analysis of advanced treatment system for reclaimed water in a power plant [J]. Industrial Water Treatment, 2024, 44(3): 206-210.
[10]	Ning AN, Yuying HAO, Shaowei HU, Peng CHEN, Fei WANG, Yong WANG, Fang LIU, Hanfei LI. Photocatalytic treatment of coking wastewater by cerium oxide loading with nitrogen-doping co-modified graphite carbon nitride [J]. Industrial Water Treatment, 2024, 44(12): 184-191.
[11]	Zhaoyang LI, Qinglin YAO, Hao Zhang, Cheng LI, Yue GU, Shaopo WANG. Pilot scale of treatment of secondary effluent from sewage plant by three-dimensional electrode oxidation [J]. Industrial Water Treatment, 2023, 43(8): 159-164.
[12]	Chuntong LI, Huixue REN, Shuyu LIN, Shize SUN, Yuanhui BAI, Mingpu SUN, Daoji WU. Research progress of DSA electrode optimization for treatment of refractory wastewater [J]. Industrial Water Treatment, 2023, 43(8): 48-56.
[13]	Dongyu YANG, Jiyuan LI. Optimization of precoated dynamic membrane for municipal wastewater based on response surface methodology [J]. Industrial Water Treatment, 2023, 43(6): 111-116.
[14]	Yupeng WU, Hui FANG, Xiaoran LIU, Yulei ZHANG. Experimental study on COD treatment of desulphurization wastewater by electrocatalytic oxidation [J]. Industrial Water Treatment, 2023, 43(5): 122-128.
[15]	Jianlei GAO, Zhenduo LIU, Yixin YAN, Wei WENG. Advanced treatment process of norfloxacin pharmaceutical wastewater by magnetic coagulation-UV/O₃ [J]. Industrial Water Treatment, 2023, 43(5): 44-51.

Please choose a citation manager

Content to export