微絮凝对超滤膜处理城市污水的影响

doi:10.19965/j.cnki.iwt.2021-0171

摘要/Abstract

摘要：

以AlCl₃、Al₁₃为絮凝剂，研究了微絮凝对超滤膜处理城市污水过程的影响。主要考察了投加量对絮凝效率的影响，分析了Zeta电位、膜阻力分布、分形维数等特征，探讨了微絮凝对超滤膜通量的作用机制。结果表明：微絮凝能强化超滤对有机物的去除效果，Al₁₃絮凝剂比AlCl₃的电中和能力更强；滤饼层阻力在膜阻力中占主导地位，经Al₁₃絮凝后滤饼层阻力和膜孔阻塞阻力均有所下降；在相同条件下，Al₁₃絮凝剂生成的絮体更加紧实，有利于阻止污染物进入膜孔，从而延缓膜通量下降。

关键词: 微絮凝, 城市污水, 超滤, 膜污染

Abstract:

Taking AlCl₃ and Al₁₃ as flocculant, the influences of micro-flocculation on ultra-filtration(UF) membrane treatment of municipal wastewater were investigated. The influences of dosage on flocculation efficiency were mainly studied. Moreover, the characteristics of Zeta potential, membrane resistance distribution and fractal dimension were investigated, respectively. And the action mechanism of micro-flocculation on UF membrane was also discussed. The results demonstrated that micro-flocculation could enhance the removal effect of organic compounds. Furthermore, the Al₁₃ had stronger charge neutralization ability than AlCl₃. The cake layer resistance occupied the leading position of the membrane resistance. The cake layer resistance and the pore resistance were all decreased after flocculation with Al₁₃. Under the same condition, the floc formed by Al₁₃ had denser structure, which was beneficial to reduce the intrinsic membrane resistance and membrane fouling.

Key words: micro-flocculation, municipal wastewater, ultrafiltration, membrane fouling

中图分类号:

X703

闻豪,凌晓. 微絮凝对超滤膜处理城市污水的影响[J]. 工业水处理, 2021, 41(11): 84-88.

Hao WEN,Xiao LING. Influences of micro-flocculation on treatment of municipal wastewater by ultrafiltration membrane[J]. Industrial Water Treatment, 2021, 41(11): 84-88.

https://www.iwt.cn/CN/Y2021/V41/I11/84

图/表 7

图1 实验装置

Fig.1 Experimental device

图2 投加量对污染物去除效果的影响

Fig.2 Effect of dosage on pollutant removal efficiency

图3 三维荧光光谱

Fig.3 Three-dimensional fluorescence spectrum

图4 投加量对Zeta电位的影响

Fig.4 Effect of dosage on Zeta potential

图5 絮凝剂对膜阻力的影响

Fig.5 Effect of flocculants on membrane resistance

表1 投加量及搅拌速度对二维分形维数D₂的影响

Table 1 Effect of dosage and stirring speed on two-dimensional fractal dimension

项目	D₂
	投加质量浓度/（mg·L^-1）				搅拌速度/（r·min^-1）
	2.5	5.0	7.5	10.0	100	150	200	250
AlCl₃	1.622	1.694	1.723	1.786	1.686	1.707	1.723	1.694
Al₁₃	1.683	1.726	1.835	1.866	1.725	1.756	1.835	1.804

图6 超滤膜通量变化情况

Fig.6 The change of Ultrafiltration membrane flux

参考文献 15

1	LI Sheng , LEE S T , SINHA S , et al. Transparent exopolymer particles(TEP) removal efficiency by a combination of coagulation and ultrafiltration to minimize SWRO membrane fouling[J]. Water Research, 2016, 102, 485- 493. doi: 10.1016/j.watres.2016.06.055
2	李新望, 谷晓娟, 左大海, 等. 陶瓷超滤膜处理煤矿矿井水的中试研究[J]. 工业水处理, 2020, 40 (1): 60- 62. URL
3	PEIRIS R H , JAKLEWICZ M , BUDMAN H , et al. Assessing the role of feed water constituents in irreversible membrane fouling of pilotscale ultrafiltration drinking water treatment systems[J]. Water Research, 2013, 47 (10): 3364- 3374. doi: 10.1016/j.watres.2013.03.015
4	王旭东, 石彩霞, 廖正伟, 等. 微絮凝对腐殖酸超滤过程膜污染的减缓特性[J]. 环境科学, 2018, 39 (9): 4249- 4256. URL
5	BERTSCH P M , PARKER D R . The environmental chemistry of aluminum[M]. New York: Lewis Publishers, 1995: 117- 168.
6	张大为, 徐慧, 王东升, 等. 混凝剂中的铝形态对藻类混凝过程的影响[J]. 中国给水排水, 2020, 36 (5): 39- 45. URL
7	王振北. 基于铝形态影响分析的混凝超滤过程膜污染控制机制研究[D]. 哈尔滨: 哈尔滨工业大学, 2018.
8	WANG Dongsheng , SUN Wei , XU Yi , et al. Speciation stability of inorganic polymer flocculant-PACl[J]. Colloids and Surfaces: Physicochemical and Engineering Aspects, 2014, 243 (1): 1- 10.
9	王东升. 聚铁硅型复合无机高分子絮凝剂的形态特征与性能[D]. 北京: 中国科学院生态环境研究中心, 1997.
10	WANG Dongsheng , TANG Hongxiao , GREGORY J . Relative importance of charge neutralization and precipitation on coagulation of kaolin with PACl: Effect of sulfate ion[J]. Environmental Science & Technology, 2002, 36 (8): 1815- 1820. URL
11	ALLOUCHE L , HUGUENARD C , TAULELLE F . 3QMAS of three aluminum polycations: space group consistency between NMR and XRD[J]. Journal of Physics and Chemistry of Solids, 2001, 62 (8): 1525- 1531. doi: 10.1016/S0022-3697(01)00069-5
12	CHAKRABORTI R K , ATKINSON J F , VAN BENSCHOTEN J E . Characterization of alum floc by image analysis[J]. Environmental Science & Technology, 2000, 34 (18): 3969- 3976.
13	LIU Yongwang , LI Xing , YANG Yanling , et al. Analysis of the major particle-size based foulants responsible for ultrafiltration membrane fouling in polluted raw water[J]. Environmental Science & Technology, 2015, 347 (8): 191- 198. URL
14	PEIRIS R H , BUDMAN H , MORESOLI C , et al. Understanding fouling behavior of ultrafiltration membrane processes and natural water using principal component analysis of fluorescence excitationemission matrices[J]. Journal of Membrane Science, 2010, 357 (1-2): 62- 72. doi: 10.1016/j.memsci.2010.03.047
15	曹福, 刘红, 吴克明. 聚合氯化铝铁的电动性能研究[J]. 环境污染与防治, 2007, 29 (9): 674- 677. doi: 10.3969/j.issn.1001-3865.2007.09.010

[1]	李冰, 吴迪, 石岩, 李海翔, 李甫, 马毅. 膜耦合技术对沼液浓缩及净水效果的影响[J]. 工业水处理, 2024, 44(5): 156-163.
[2]	史金卓, 胡以松, 肖文倩, 李松华, 杨媛, 田文瑞. 电化学-膜生物反应器强化污废水处理的研究进展[J]. 工业水处理, 2024, 44(5): 32-41.
[3]	任芝军, 白莹, 王秋稳, 韩金龙, 刘晓阳. 膜污染的光学监测技术研究进展[J]. 工业水处理, 2024, 44(4): 10-18.
[4]	兰莹, 耿安朝, 耿策, 单以停, 李旭. 非浸没式超滤技术净化处理煤矿矿井水的试验研究[J]. 工业水处理, 2024, 44(4): 179-186.
[5]	张棱威, 宁荣盛, 袁江, 于水利. 导电膜膜蒸馏研究进展[J]. 工业水处理, 2024, 44(4): 30-37.
[6]	尹萌萌, 王禹翰, 张坤, 王冠, 徐维国, 王波. 基于两性离子的纳滤膜抗污染改性方法研究进展[J]. 工业水处理, 2024, 44(3): 37-44.
[7]	李棒, 田腾飞, 吴俊峰, 朱新锋, 韩昌睿, 崔璐雪, 张霞, 贠延滨. 膜蒸馏处理脱硫废水过程中污染物组成、分布及形成机理[J]. 工业水处理, 2024, 44(2): 139-146.
[8]	戚滢滢, 苏洋舟, 程晓英, 刘强, 张晓磊. 双膜法处理化工废水过程中反渗透膜污染研究[J]. 工业水处理, 2024, 44(11): 142-147.
[9]	杨伟球, 史广宇. 光伏企业生产废水处理工程实例[J]. 工业水处理, 2024, 44(11): 172-176.
[10]	田茂芝, 丁梓尧, 孙晨, 周玮钰, 王圣智, 万瀚宇, 李昆. 养殖废水中Fe³⁺累积对藻菌共生体EPS分泌及膜污染特征的影响[J]. 工业水处理, 2024, 44(10): 60-67.
[11]	司马聪, 张新波, 程衍斌, 王慧中, 杜青, 钟玲玲, NGO Huu Hao. DcMFC-AnMBR耦合系统处理含磺胺嘧啶养猪废水的性能研究[J]. 工业水处理, 2024, 44(10): 68-75.
[12]	王国辉, 闫家国, 李艳丽, 王鑫, 陈妹. 光催化耦合膜分离系统中缓解膜污染的研究进展[J]. 工业水处理, 2024, 44(10): 82-91.
[13]	邓岳鹏, 赵鹏, 唐升引, 李赫, 杨锴, 徐旋波, 张锡辉. OAAO-陶瓷膜MBR一体化工艺用于市政污水处理厂扩容工程[J]. 工业水处理, 2024, 44(10): 201-206.
[14]	张瑞君, 安张鑫, 宗悦, 高珊珊, 田家宇. 中空纤维纳滤膜在染料分离应用中的研究进展[J]. 工业水处理, 2024, 44(1): 1-12.
[15]	夏艺珺. 贫水高新区AM-OLED工业废水规模化回用工程实例[J]. 工业水处理, 2023, 43(8): 165-171.

选择文件类型/文献管理软件名称

选择包含的内容