| 阵列平板膜污染分析与清洗应用 |
| 作者：郝燕1， 孙广东1，2， 代攀1， 张瑜1， 李彦1， 邹浩然1， 肖康3 |
| 单位： 1. 北京碧水源膜科技有限公司, 北京 101407； 2. 中交集团城乡水环境技术研发中心， 北京 100029； 3. 中国科学院大学 资源与环境学院， 北京 101408 |
| 关键词： 阵列平板膜； 膜污染； MBR； 工程案例； 村镇污水； 一体化装置 |
| DOI号： 10.16159/j.cnki.issn1007-8924.2024.06.015 |
| 分类号： TQ028； X505 |
| 出版年,卷(期):页码： 2024,44(6):122-131 |
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摘要： |
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膜污染是膜生物反应器（MBR）中普遍存在的问题.在工程应用中对膜组器进行定期清洗是缓解膜污染的有效方法.阵列平板膜是一种波纹状的平板膜，其主要优点有装填密度大、运行通量高和免离线清洗.本文介绍了阵列平板膜在一体化污水处理装置中的应用案例及其化学清洗方案.该案例中的膜片污染较为严重，清水通量仅为未使用膜片的7%，膜表面的无机-有机复合污染层中Fe和Ca的质量浓度分别达到5 384 mg/m2和1400 mg/m2，总有机碳质量浓度548 mg/m2（多糖质量浓度400 mg/m2）.经草酸与次氯酸钠恢复性在线清洗后，跨膜压差由29 kPa恢复至11 kPa.随后，设备在25 L/(m2·h)通量条件下持续运行，每月进行1次500 mg/L次氯酸钠维护性清洗，在5个月的监测周期内，设备整体未出现明显压力波动情况，表现出较好的运行稳定性.这说明有机物对无机-有机复合污染起到关键作用，次氯酸钠的维护性清洗能有效去除阵列平板膜的有机污染物，进而遏制后续复合污染的形成. ? |
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Membrane fouling is a common problem in membrane bioreactor (MBR). Regular cleaning of membrane cassettes is an effective method to alleviate membrane fouling in engineering applications. The arrayed flat sheet membrane, as a kind of membrane with corrugation, has the advantages of high density, high flux and being free of off-line cleaning. This article introduces the application case of arrayed flat sheet membrane in integrated MBR-based sewage purification equipment and its chemical cleaning scheme. In this case, the membrane fouling was serious, resulting in a pure water flux of only 7% of the new membrane. The amounts of Fe and Ca in the inorganic-organic composite layer on the membrane surface reached 5 384 mg/m2 and 1 400 mg/m2, respectively, and the total organic carbon content reached 548 mg/m2 (with an polysaccharide concentration of 400 mg/m2). After a restorative online cleaning using oxalic acid and sodium hypochlorite, the transmembrane pressure of the arrayed flat sheet membrane recovered from 29 kPa to 11 kPa. The equipment was then operated continuously at a flux of 25 L/(m2·h), with a monthly maintenance cleaning using 500 mg/L sodium hypochlorite solution. During the five-month monitoring period, the transmembrane pressure did not fluctuate significantly, showing good operation stability. The result indicated that organic matter played a key role in the inorganic-organic combined fouling, and the maintenance cleaning using sodium hypochlorite could effectively remove organic foulants from the arrayed flat sheet membrane, thus curbing the formation of subsequent combined fouling. |
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基金项目： |
| 北京市自然科学基金项目（JQ22027） |
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作者简介： |
| 郝燕（1993-），女，山东滕州人，工程师，硕士研究生，研究方向为水处理MBR膜工艺 |
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参考文献： |
| [1]吴立群,唐婷婷,张园园,等.新型MBR平板膜及膜堆研究进展[J].浙江化工,2020,51(10):4. [2]张姣,肖康,梁帅,等.膜技术在中国市政污水处理与再生中的应用现状与未来挑战[J].环境工程,2022,40(3):1-6. [3]Corsino S F, Di Bella G, Traina F, et al. Membrane fouling mitigation in MBR via the Feast-Famine strategy to enhance PHA production by activated sludge[J]. Membranes, 2022, 12(7): 703. [4]班福忱,杨诗源.水处理中超滤膜污染及其应对方式研究进展[J].水处理技术, 2021,47(4):15-19. [5]陈鹏,张绍青,张立秋,等.MBR中膜污染表征手段的研究进展[J].工业水处理, 2021,41(8):25-33. [6]卜凡. 混凝、吸附与氧化预处理对超滤工艺水处理效能和膜污染的影响[D].济南：山东大学,2019. [7]张雷,田雪咏,史立伟,等.MBR膜污染防治策略研究现状[J].环境工程,2023,41(S1):174-178. [8]Lay H T, Yeow R J E, Ma Y, et al. Internal membrane fouling by proteins during microfiltration[J]. J Membr Sci, 2021, 637: 119589. [9]Teng J, Zhang M, Leung K, et al. A unified thermodynamic mechanism underlying fouling behaviors of soluble microbial products (SMPs) in a membrane bioreactor[J]. Water Research, 2019,149:477-487. [10]Li K, Li S, Huang T, et al. Chemical cleaning of ultrafiltration membrane fouled by humic substances: Comparison between hydrogen peroxide and sodium hypochlorite[J]. Int J Environm Res Public Health, 2019, 16(14): 2568. [11]Wang Z, Ma J, Tang C Y, et al. Membrane cleaning in membrane bioreactors: a review[J]. J Membr Sci, 2014, 468: 276-307. [12]孙金旭. 微滤膜界面生物型污染特征与影响因素研究[D].哈尔滨:哈尔滨工业大学,2020. [13]Gul A, Hruza J, Yalcinkaya F. Fouling and chemical cleaning of microfiltration membranes: A mini-review[J]. Polymers, 2021, 13(6): 846. [14]Martin V N, Tong J, Yu D, et al. Membrane fouling characteristics of a side-stream tubular anaerobic membrane bioreactor (AnMBR) treating domestic wastewater[J]. Processes, 2018, 6(5): 50. [15]Lin B, Heijman S G J, Shang R, et al. Integration of oxalic acid chelation and Fenton process for synergistic relaxation-oxidation of persistent gel-like fouling of ceramic nanofiltration membranes[J]. J Membr Sci, 2021, 636: 119553. [16]Dutta A, Kalam S, Lee J. Elucidating the inherent fouling tolerance of membrane contactors for ammonia recovery from wastewater[J]. J Membr Sci, 2022, 645: 120197. [17]Omar J M, Nor M Z M, Basri M S M, et al. Clarification of guava juice by an ultrafiltration process: Analysis on the operating pressure, membrane fouling and juice qualities[J]. Food Research, 2020, 4(Suppl): 85-92. [18]Aguiar A, Andrade L, Grossi L, et al. Acid mine drainage treatment by nanofiltration: a study of membrane fouling, chemical cleaning, and membrane ageing[J]. Sep Purif Technol, 2018, 192: 185-195. [19]尤章超,王德兵,王巧英,等.MBR污水处理工艺长期运行中的膜强化清洗方式[J].净水技术,2022,41(2):75-80. [20]刘琛,李亮,钱光升,等.膜生物反应器膜污染与控制研究进展[J].环境保护与循环经济, 2017,37(10):20-25. [21]李秀芬,周强,陈春梅,等.MBR处理生活污水的膜污染特征及其清洗[J].中国给水排水, 2016,32(23):27-30. [22]郝燕,孙广东,代攀,等.阵列平板膜在MBR系统中的运行效能分析[J].环境工程,2023,41(5):147-153,162. |
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