长期服役BAC滤池的有机物去除效能与运行优化

doi:10.11988/ckyyb.20240044

raybet体育在线院报 ›› 2025, Vol. 42 ›› Issue (4): 87-96.DOI: 10.11988/ckyyb.20240044

长期服役BAC滤池的有机物去除效能与运行优化

张可佳¹^,²^,³(), 赖浩林¹^,², 岑程¹^,², 周沛璇¹^,², 张孝洪⁴, 傅舟跃⁴

¹ 浙江大学建筑工程学院,杭州 310058
² 浙江大学浙江省饮用水安全与输配技术研究重点实验室,杭州 310058
³ 浙江大学长三角智慧绿洲创新中心,浙江嘉善 314100
⁴ 舟山市自来水有限公司,浙江舟山 316021

收稿日期:2024-01-17 修回日期:2024-05-22 出版日期:2025-04-01 发布日期:2025-04-01
作者简介:
张可佳(1983- ),女,四川隆昌人,教授,博士,主要从事饮用水安全保障技术方面的研究。E-mail:zhangkj@zju.edu.cn
基金资助:
浙江省自然科学基金项目(LR24E080003); 国家重点研发计划项目(2022YFC3203601)

Organic Compounds Removal Efficiency and Operational Performance Optimization of Long-Term In-Service BAC Filter

ZHANG Ke-jia¹^,²^,³(), LAI Hao-lin¹^,², CEN Cheng¹^,², ZHOU Pei-xuan¹^,², ZHANG Xiao-hong⁴, FU Zhou-yue⁴

¹ College of Civil Engineering and Architecture, Zhejiang University,Hangzhou 310058,China
² Zhejiang Key Laboratory of Drinking Water Safety and Distribution Technology, Zhejiang University, Hangzhou 310058, China
³ Innovation Center of Yangtze River Delta, Zhejiang University, Jiashan 314100, China
⁴ Zhoushan Water Supply Co., Ltd., Zhoushan 316021, China

Received:2024-01-17 Revised:2024-05-22 Published:2025-04-01 Online:2025-04-01

摘要/Abstract

摘要： 生物活性炭(BAC)滤池长期服役存在有机物去除效能下降甚至失效的风险。为了探究长期服役BAC滤池的有机物去除效能并提出针对性的运行优化方案,选取了Z市LC水厂服役12 a的BAC滤池作为研究对象,采用总有机碳(Total Organic Carbon,TOC)去除效果对其运行性能进行分析,并从臭氧(Ozone,O₃)投加量和反冲洗方式等角度探究优化方案。结果表明:LC水厂对于有机物的去除效果存在较大波动,失效的风险较高。生物降解是长期服役BAC滤池去除有机物的主要机制,其贡献率为67%,而吸附作用的贡献率仅为33%;当O₃投加量为0.36~0.52 mg O₃/mg TOC时,LC水厂BAC滤池的运行性能较优,过低、过高的O₃投加量均不利于长期服役BAC滤池运行性能的提高;LC水厂表层和中上层BAC在反冲洗前均存在出水TOC升高的现象,使用含0.5 mg/L有效氯的水进行反冲洗有助于改善长期服役BAC滤池的运行性能。

关键词: 生物活性炭滤池, 长期服役, 有机物, 去除效能, 总有机碳, 臭氧投加量, 反冲洗方式, 运行性能, 优化方案

Abstract:

Biological activated carbon (BAC) filters that have been in service for an extended period (over 7 years) may encounter a decline or even a complete loss in the removal efficiency of organic compounds. To investigate the removal efficiency of organic compounds in long-serving BAC filters and propose targeted operational optimization strategies, we selected a 12-year-old BAC filter at the LC water treatment plant (WTP) in City Z as our research subject. We analyzed its operational performance by evaluating the total organic carbon (TOC) removal efficiency and explored optimization strategies from the aspects of ozone (O₃) dosage and backwashing methods. The results revealed that the LC WTP experienced significant fluctuations in the organic compound removal efficiency, with a high risk of ineffectiveness. Biodegradation is the primary mechanism for organic compound removal in long-serving BAC filters, accounting for approximately 67%, while adsorption only contributes 33%. When the specific O₃ dosage ranged from 0.36 to 0.52 mg O₃/mg TOC, the BAC filter at the LC WTP performed relatively well. Either too low or too high O₃ dosage was unfavorable for enhancing the performance of long-serving BAC filters. At the LC WTP, the TOC levels in the effluent from both the surface and upper layers of the BAC filter increased before backwashing. Backwashing with water containing 0.5 mg/L of effective chlorine can improve the performance of long-serving BAC filters.

Key words: BAC filter, long-term in-service, organic compounds, removal efficiency, total organic carbon, O₃ dosage, backwashing methods, operational performance, optimization scheme

中图分类号:

TU991给水工程(上水道工程}

张可佳, 赖浩林, 岑程, 周沛璇, 张孝洪, 傅舟跃. 长期服役BAC滤池的有机物去除效能与运行优化[J]. raybet体育在线院报, 2025, 42(4): 87-96.

ZHANG Ke-jia, LAI Hao-lin, CEN Cheng, ZHOU Pei-xuan, ZHANG Xiao-hong, FU Zhou-yue. Organic Compounds Removal Efficiency and Operational Performance Optimization of Long-Term In-Service BAC Filter[J]. Journal of Changjiang River Scientific Research Institute, 2025, 42(4): 87-96.

图/表 9

表1 LC水厂O3-BAC工艺参数

Table 1 Parameters of O3-BAC process of LC WTP

水厂名称	预O₃接触池		主O₃接触池		BAC滤池
水厂名称	投加量/ (mg·L^-1)	接触时间/ min	投加量/ (mg·L^-1)	接触时间/ min	EBCT/ min	反冲洗强度/ (m³·m^-2·h^-1)	反冲洗周期/d
LC	0.8	3	0.5	13	11	55(气冲) 17(水冲)	5

图1 试验过程与试验装置

Fig.1 Test process and test device

图2 LC水厂2022年1—12月份的TOC去除情况

Fig.2 TOC removal of LC WTP from January to December,2022

图3 灭菌和非灭菌BAC反应器的TOC变化趋势

Fig.3 Change trends of TOC values in sterilized and unsterilized BAC

图4 灭菌和非灭菌BAC中两种有机物去除性能的贡献率

Fig.4 Contribution rates of two organic compounds removal in sterilized and unsterilized BAC

图5 O3投加量对BAC滤池运行性能的影响

Fig.5 Effect of O3 dosage on operational performance of BAC filter

图6 不同O3投加量条件下O3-BAC工艺的EEM光谱注:Ex为激发波长,Em为发射波长,以下同。

Fig.6 EEM spectra of O3-BAC process under different O3 dosages

图7 普通和强化反冲洗对于BAC滤池运行性能的影响

Fig.7 Effect of ordinary backwashing and enhanced backwashing on the operational performance of BAC filter

图8 反冲洗前后表层BAC反应器运行的EEM光谱图

Fig.8 EEM spectra of surface layer of BAC contactor before and after backwashing

[1]	张双印, 徐平, 王密, 赵保成, 付重庆, 郑航, 徐坚, 赵登忠, 程学军, 郑学东. 长江源查旦湿地表层土壤有机碳空间分布[J]. raybet体育在线院报, 2025, 42(3): 193-201.
[2]	丰桂珍, 杨银, 江立文. 天然有机物引起的超滤膜污染研究进展[J]. raybet体育在线院报, 2020, 37(3): 26-31.
[3]	何良杰, 何浩松, 谭康豪, 覃英宏. 深色有机掺合料加快尾矿泥浆排水蒸发研究[J]. raybet体育在线院报, 2020, 37(10): 131-136.
[4]	张楠楠, 胡斌, 王沛芳. 天然有机物光化学反应的研究进展[J]. raybet体育在线院报, 2017, 34(7): 24-31.
[5]	杭永山,孙军,王轩,赵世航,黄桂香. 粉细砂层降水管井包网过滤器优化试验研究[J]. raybet体育在线院报, 2015, 32(4): 116-119.

长期服役BAC滤池的有机物去除效能与运行优化

Organic Compounds Removal Efficiency and Operational Performance Optimization of Long-Term In-Service BAC Filter

RichHTML

PDF

可视化

摘要/Abstract

引用本文

使用本文

图/表 9

相关文章 5

编辑推荐

Metrics

本文评价