| 热电厂双膜法中水深度处理系统运行效果与问题分析 |
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| 引用本文： | 王钢, 岳增刚, 郑利兵, 张春, 郁达伟, 夏森, 梁国良, 魏源送. 热电厂双膜法中水深度处理系统运行效果与问题分析[J]. 环境工程学报, 2019, 13(4): 773-783. doi: 10.12030/j.cjee.201812040 |
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| 作者姓名： | 王钢 岳增刚 郑利兵 张春 郁达伟 夏森 梁国良 魏源送 |
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| 作者单位： | 1.华能嘉祥发电有限公司，济宁 272400; 2.中国科学院生态环境研究中心，环境模拟与污染控制国家重点联合实验室，北京 100085; 3.中国科学院生态环境研究中心，水污染控制实验室，北京 100085; 4.华能济宁电厂，济宁 272121; 5.中国科学院大学，北京 100049 |
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| 基金项目： | 国家重点研发计划;江西省重点研发项目 |
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| 摘 要： | 中水已成为热电厂的重要水源，其深度处理是影响电厂水处理系统的关键。为评估双膜法在电厂深度处理中的潜力与稳定性，考察了山东某热电厂石灰混凝-超滤(UF)-反渗透(RO)系统不同季节的处理效果及污染物去除特征与各工段贡献率。研究表明：双膜法对浊度、色度、电导、碱度、COD和TOC的去除率分别达95.82%、96.62%、96.73%、98.22%、96.42%和89.13%，在夏季严重膜污堵的条件下，也可保障产水达标，是一种有效的中水深度处理技术。预处理仅去除某些大分子腐殖酸类有机物、硬度类物质、悬浮物，富里酸类有机物、氮等其他溶解性物质主要由RO去除(去除率均60%)，因此，存在膜结垢和污堵的风险。不同季节污染物浓度变化不显著，但夏季高温条件下微生物代谢和繁殖速率较高，荧光指数(fluorescence index, FI)大于2，生物指数(biological index, BIX)为1.2左右，这是夏季膜污堵爆发的关键原因。
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| 关 键 词： | 双膜法 中水回用 热电厂 膜污堵 深度处理 |
Performance and limitations of a full-scale dual membrane process for advanced treatment and reuse of reclaimed water in a thermal power plant |
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| WANG Gang, YUE Zenggang, ZHENG Libing, ZHANG Chun, YU Dawei, XIA Sen, LIANG Guoliang, WEI Yuansong. Performance and limitations of a full-scale dual membrane process for advanced treatment and reuse of reclaimed water in a thermal power plant[J]. Chinese Journal of Environmental Engineering, 2019, 13(4): 773-783. doi: 10.12030/j.cjee.201812040 |
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| Authors: | WANG Gang YUE Zenggang ZHENG Libing ZHANG Chun YU Dawei XIA Sen LIANG Guoliang WEI Yuansong |
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| Affiliation: | 1.Huaneng Jiaxiang Power Generation Co.Ltd., Jining 272400, China; 2.State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; 3.Laboratory of Water Pollution Control Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; 4.Huaneng Jining Power Generation Co.Ltd., Jining 272121, China; 5.University of Chinese Academy of Sciences, Beijing 100049, China* Correspording author, E-mail: lbzheng@rcees.ac.cn |
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| Abstract: | Reclaimed water has been an important water source in thermal power plant (TPP) and the advanced treatment was the key process for its TPP application. In order to evaluate the potential and stability of a dual membrane process for advanced treatment of reclaimed water in a thermal power plant, the treatment performance in different seasons, pollutant removal characteristic and contribution rate of each treatment unit were investigated for a full-scale lime coagulation- UF- RO process in a TPP in Shandong province. The results showed that the remove efficiencies of the dual-membrane system for turbidity, color, conductivity, alkalinity, COD and TOC were 95.82%, 96.62%, 96.73%, 98.22%, 96.42% and 89.13%, respectively. Even under the condition of severe membrane fouling during summer, its effluent still met the related standards, which indicated its effectivity on the advanced treatment of reclaimed water. The pretreatment units only removed some high molecular weight humic acids, hardness and suspending matters, while RO mainly removed fulvic acids, nitrogen and other dissolved matters with 60% removal efficiencies. Thus, this phenomenon would cause the risk for membrane scaling and fouling. The variations of pollutants concentration were not significant, but the high rates of microbe metabolism and propagation occurred in summer, which led to high microbe activity (FI>2, BIX≈1.2) in water. The corresponding biofouling is the key reason for the outbreak of membrane fouling. |
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| Keywords: | dual-membrane technology reclaimed water reuse thermal power plant membrane fouling advanced treatment |
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