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周志伟

教授
博士生导师

建筑工程学院

1985年出生，博士（后），北京工业大学教授，硕士生导师，兼任城建学部市政工程系实验教学中心副主任。2016年1月毕业于北京工业大学，获工学博士学位，师从杨艳玲和李星研究员。一直从事饮用水净化机理和创新技术的研究，在饮用水处理中的混凝控制技术、粉末活性炭的吸附、再生与循环利用以及超滤膜污染控制技术与原理方面开展了较为系统深入的研究，已发表科技文章68篇，申请专利12项。其中，第一作者或通讯作者SCI文章31篇（JCR一区16篇，IF均＞3.0），授权国家发明专利3项，部分研究成果在实际工程中推广应用。目前，正主持国家和省部级应用基础项目4项，参加过国家重大水专项、国家自然科学基金等多项科研项目。协助指导过本科生4名、外籍留学生1名和硕士研究生7名，博士研究生3名。担任中国城镇供水排水协会青年委员会委员，国家自然科学基金评审专家，为Ultrasonics Sonochemistry、Science of the Total Environment、Chemosphere、Separation and Purification Technology等国际期刊杂志审稿人。

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Adsorption adaptive response exposed to algal organic matter: correlation to the characteristics of granular activated carbon SCIE
期刊论文 | 2025 | ENVIRONMENTAL TECHNOLOGY
Han, Fei | Ding, Luming | Li, Xing | Zhou, Zhiwei | Lu, Zedong Unfold
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Abstract ：

The release of algal organic matter (AOM) during seasonal algal blooms increases the complexity and heterogeneity of natural organic matter (NOM) in water sources, altering its hydrophilic-hydrophobic balance and posing significant challenges to conventional water treatment processes. This study aims to verify whether the (Granular activated carbon) GAC selected for the adsorption of NOM in sand filtration effluent can adapt to water quality fluctuations caused by AOM release, and identify the criteria influencing GAC adsorption performance. Results indicated that external surface area, mesopore volume, pore size and surface functional groups were key indicators of GAC adsorption performance. AOM exposure increased the soluble microbial byproducts (SMP) and humic acid components in sand filter effluent, and induced the presence of high molecular weight biopolymers. The removal characteristics of sand filtration effluent spiked with AOM indicated that GAC preferentially adsorbed unsaturated bonds and aromatic compounds, as well as organic acids like fulvic and humic acids. Its adsorption primarily involved physical and chemical processes such as pore filling, hydrophobic interactions, and reactions between chemical functional groups. AOM exposure led to an increase in hydrophilic macromolecules such as polysaccharides and proteins, causing competitive adsorption and pore blockage. This study provided a theoretical basis for the efficient and rapid selection of GAC during outbreaks of AOM pollution.

Keyword ：

Granular activated carbon (GAC) Granular activated carbon (GAC) algal organic matter (AOM) algal organic matter (AOM) sand filtration effluent sand filtration effluent adsorption mechanism adsorption mechanism sand filtration effluent spiked with AOM sand filtration effluent spiked with AOM

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GB/T 7714 Han, Fei , Ding, Luming , Li, Xing et al. Adsorption adaptive response exposed to algal organic matter: correlation to the characteristics of granular activated carbon [J]. | ENVIRONMENTAL TECHNOLOGY , 2025 .
MLA Han, Fei et al. "Adsorption adaptive response exposed to algal organic matter: correlation to the characteristics of granular activated carbon" . | ENVIRONMENTAL TECHNOLOGY (2025) .
APA Han, Fei , Ding, Luming , Li, Xing , Zhou, Zhiwei , Lu, Zedong . Adsorption adaptive response exposed to algal organic matter: correlation to the characteristics of granular activated carbon . | ENVIRONMENTAL TECHNOLOGY , 2025 .
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Hydrodynamic solar-driven interfacial evaporation - Gone with the flow SCIE
期刊论文 | 2024 , 266 | WATER RESEARCH
Ren, Jiawei | Xu, Jia | Tian, Shuangchao | Shi, Ke | Gu, Tianyu | Zhao, Jiaheng | Li, Xing | Zhou, Zhiwei | Tijing, Leonard | Shon, Ho Kyong Unfold
WoS CC Cited Count： 1
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Abstract ：

Evaporation has been one of the most classic desalination processes on the Earth. When we try to use the power of water flow itself, the evaporation process can perform even better. Here, we report a hydrodynamic solardriven interfacial evaporation process which water evaporation rate can achieve 6.58 kg & sdot;m(-2)& sdot;h(-1) (over 100 times higher than natural evaporation). A waterwheel-structure solar interfacial evaporator was designed and assembled by printed filter papers. The evaporator can both rapidly distribute solution on the evaporation interface and be hydraulically driven to rotate continuously to improve the evaporation rate by water flow. The hydrodynamic solar-driven interfacial evaporation process successfully overcomes the problem of slow diffusion of water vapor, but also realizes the day-and-night operation of process and the self-cleaning of salt fouling. Apart from the application in solar desalination, the developed evaporator has great potentials in vapor production and salt recovery for industrial use.

Keyword ：

Salt fouling removal Salt fouling removal Day-and-night operation Day-and-night operation Hydrodynamic evaporation system Hydrodynamic evaporation system Ultra-high evaporation rate Ultra-high evaporation rate Dynamic solar-driven interfacial evaporation Dynamic solar-driven interfacial evaporation Waterwheel evaporator Waterwheel evaporator

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GB/T 7714 Ren, Jiawei , Xu, Jia , Tian, Shuangchao et al. Hydrodynamic solar-driven interfacial evaporation - Gone with the flow [J]. | WATER RESEARCH , 2024 , 266 .
MLA Ren, Jiawei et al. "Hydrodynamic solar-driven interfacial evaporation - Gone with the flow" . | WATER RESEARCH 266 (2024) .
APA Ren, Jiawei , Xu, Jia , Tian, Shuangchao , Shi, Ke , Gu, Tianyu , Zhao, Jiaheng et al. Hydrodynamic solar-driven interfacial evaporation - Gone with the flow . | WATER RESEARCH , 2024 , 266 .
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Reduction of fouling of gravity-driven membrane by combined treatment of persulphate/nanoscale zero-valent iron/ultraviolet and dynamic dual coagulant flocs layer SCIE
期刊论文 | 2023 , 45 (17) , 3405-3417 | ENVIRONMENTAL TECHNOLOGY
Zhao, Fuwang | Zhou, Zhiwei | Du, Peng | Li, Xing | Lu, Qingxuan Unfold
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Abstract ：

In this study, persulphate and nanoscale zero-valent iron were activated by ultraviolet irradiation (PS/nZVI/UV), followed by formation of dynamic flocs with AlCl3-TiCl4 coagulant directly injected into a gravity-driven membrane (GDM) tank. Membrane fouling caused by typical organic matter fractions including humic acid (HA), HA together with bovine serum albumin (HA-BSA), HA combined with polysaccharide (HA-SA) and the HA-BSA-SA mixture at pH of 6.0, 7.5 and 9.0 were evaluated by specific flux and fouling resistance distribution. The results showed that GDM pre-layered with AlCl3-TiCl4 flocs exhibited the maximum specific flux, followed by AlCl3 and TiCl4. Pre-oxidation with 0.5 mM PS and 0.1 g nZVI under UV radiation for 20 min was beneficial to degrade HA and SA fraction with molecular weight >100 kDa and <30 kDa, and BSA fraction with <30 kDa. The presence of BSA attributed mostly to irreversible fouling, SA together with BAS could exacerbate irreversible fouling, while HA caused the least fouling. The irreversible resistance of a PS/nZVI/UV-GDM system was 62.79%, 27.27%, 58.03% and 49.68% lower than that of control GDM in the treatment of HA, HA-BSA, HA-SA and HA-BSA-SA, respectively. The PS/nZVI/UV-GDM system could achieve the highest foulants removal efficiency at pH of 6.0. Morphological observations confirmed the differences in biofouling layers in different water types. Over 30-day operation, the bacterial genera on the biofouling layer could affect the organic removals, while the type of organic matter that was present influenced the relative abundance of bacterial genera.

Keyword ：

Gravity-driven membrane Gravity-driven membrane nanoscale zero-valent iron nanoscale zero-valent iron flocs layer flocs layer biofouling layer biofouling layer ultraviolet (PS ultraviolet (PS nZVI nZVI persulphate persulphate NOM fractions NOM fractions UV) UV)

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GB/T 7714 Zhao, Fuwang , Zhou, Zhiwei , Du, Peng et al. Reduction of fouling of gravity-driven membrane by combined treatment of persulphate/nanoscale zero-valent iron/ultraviolet and dynamic dual coagulant flocs layer [J]. | ENVIRONMENTAL TECHNOLOGY , 2023 , 45 (17) : 3405-3417 .
MLA Zhao, Fuwang et al. "Reduction of fouling of gravity-driven membrane by combined treatment of persulphate/nanoscale zero-valent iron/ultraviolet and dynamic dual coagulant flocs layer" . | ENVIRONMENTAL TECHNOLOGY 45 . 17 (2023) : 3405-3417 .
APA Zhao, Fuwang , Zhou, Zhiwei , Du, Peng , Li, Xing , Lu, Qingxuan . Reduction of fouling of gravity-driven membrane by combined treatment of persulphate/nanoscale zero-valent iron/ultraviolet and dynamic dual coagulant flocs layer . | ENVIRONMENTAL TECHNOLOGY , 2023 , 45 (17) , 3405-3417 .
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Role of visible light photocatalysis in alleviation and mechanism transformation of ultrafiltration membrane fouling caused by natural organic matter SCIE
期刊论文 | 2023 , 324 | SEPARATION AND PURIFICATION TECHNOLOGY
Yu, Rui | Yang, Yanling | Zhou, Zhiwei | Li, Xing | Liu, Chunjiao | Sun, Tianjie Unfold
WoS CC Cited Count： 8
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Abstract ：

In this study, a novel composite based on bismuth oxide, reduced graphene oxide and titanium dioxide (labeled as BRGT) was utilized for visible light photocatalysis to mitigate ultrafiltration membrane fouling caused by natural organic matter (NOM). The results show that the coexistence of NOM and the BRGT composite (without photocatalysis) did not aggravate membrane fouling, and the membrane preferentially retained a high molecular weight, hydrophobic component of NOM that formed a dense cake layer with BRGT composite. As the photo-catalysis time increased, the extent of membrane fouling was alleviated. The maximum specific flux recovered from 0.21 to 0.73 at 60 min, and the hydraulic reversible and irreversible resistances ere 1.15 x 1010 and 4.23 x 1010 m-1, respectively. The reduction of NOM in the feed water, especially the removal of UV254, played a significant role in the alleviation of membrane fouling. Additionally, the changes in the properties of NOM, including the reduction of fluorescent humic and protein/polyphenol components corresponding to reversible and irreversible fouling, respectively, the photo-degradation of high molecular weight NOM into low molecular weight NOM (such as low molecular weight-acids), and the conversion of hydrophobic fractions into hydrophilic fractions, contributed to the mitigation of membrane fouling. We also found a strong negative correlation be-tween the roughness of the cake layer and irreversible fouling. Overall, the changes in the properties of NOM in feed water can hinder or even inhibit the formation of the cake layer, and the use of visible light photocatalysis of the BRGT composite has great potential to alleviate ultrafiltration membrane fouling caused by natural organic matter.

Keyword ：

Mechanism of fouling development Mechanism of fouling development Fouling mitigation Fouling mitigation Ultrafiltration Ultrafiltration Natural organic matter Natural organic matter Visible light photocatalysis Visible light photocatalysis

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GB/T 7714 Yu, Rui , Yang, Yanling , Zhou, Zhiwei et al. Role of visible light photocatalysis in alleviation and mechanism transformation of ultrafiltration membrane fouling caused by natural organic matter [J]. | SEPARATION AND PURIFICATION TECHNOLOGY , 2023 , 324 .
MLA Yu, Rui et al. "Role of visible light photocatalysis in alleviation and mechanism transformation of ultrafiltration membrane fouling caused by natural organic matter" . | SEPARATION AND PURIFICATION TECHNOLOGY 324 (2023) .
APA Yu, Rui , Yang, Yanling , Zhou, Zhiwei , Li, Xing , Liu, Chunjiao , Sun, Tianjie . Role of visible light photocatalysis in alleviation and mechanism transformation of ultrafiltration membrane fouling caused by natural organic matter . | SEPARATION AND PURIFICATION TECHNOLOGY , 2023 , 324 .
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Ultrasonic-Thermal Regeneration of Spent Powdered Activated Carbon SCIE SSCI
期刊论文 | 2023 , 15 (11) | SUSTAINABILITY
Zhang, Tingting | Yang, Yanling | Li, Xing | Zhou, Zhiwei | Wei, Bigui Unfold
WoS CC Cited Count： 5
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Abstract ：

This study investigated the ultrasonic-thermal regeneration of powdered activated carbon (PAC) spent using 4-chlorophenol (4-CP). Similarly, a thermal regeneration process was also studied and the reaction conditions (i.e., regeneration temperature, heating rate, regeneration time) were tested. Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD) analysis were applied to characterize the regenerated PACs under different treatments (thermal, ultrasonic and ultrasonic-thermal) and also compare them with the fresh and exhausted PACs. According to our regeneration observations, the ideal regeneration parameters were determined to be a 40 kHz frequency, 0.18 W/mL sonication power, 0.1 M NaOH and 50% (v/v) ethyl alcohol as the regeneration solution, and 1 g/L of saturated PAC mass with thermal regeneration as the second stage at 500 ?, desorbed for 30 min with a heating rate of 20 ? min(-1). Under these conditions, the RE value achieved 90.99% and the ? value reached 5.6%. The results of FTIR, XPS and XRD revealed that the oxygen functional group content of ultrasonic-thermal regenerated PAC significantly increased. These oxygenous groups exerted a positive effect on the adsorption process of the regenerated PAC and the subsequent adsorption-regeneration process.

Keyword ：

characteristic characteristic powdered activated carbon powdered activated carbon thermal thermal ultrasonic ultrasonic regeneration regeneration

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GB/T 7714 Zhang, Tingting , Yang, Yanling , Li, Xing et al. Ultrasonic-Thermal Regeneration of Spent Powdered Activated Carbon [J]. | SUSTAINABILITY , 2023 , 15 (11) .
MLA Zhang, Tingting et al. "Ultrasonic-Thermal Regeneration of Spent Powdered Activated Carbon" . | SUSTAINABILITY 15 . 11 (2023) .
APA Zhang, Tingting , Yang, Yanling , Li, Xing , Zhou, Zhiwei , Wei, Bigui . Ultrasonic-Thermal Regeneration of Spent Powdered Activated Carbon . | SUSTAINABILITY , 2023 , 15 (11) .
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Enhanced permeation performance of biofiltration-facilitated gravity-driven membrane (GDM) systems by in-situ application of UV and VUV: Comprehensive insights from thermodynamic and multi-omics perspectives SCIE
期刊论文 | 2023 , 242 | WATER RESEARCH
Feng, Jianyong | Li, Xing | Lu, Zedong | Yang, Yanling | Zhou, Zhiwei | Liang, Heng Unfold
WoS CC Cited Count： 14
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Abstract ：

Biofouling is a major challenge limiting the practical application of biofiltration-facilitated gravity-driven membrane (GDM) systems in drinking water treatment. In this study, ultraviolet irradiation, including ultraviolet (UV) and vacuum ultraviolet (VUV) irradiation, was used for in-situ purification of membrane tanks to control membrane biofouling. After using UV and VUV, the permeate flux increased significantly by 26.1% and 78.3%, respectively, which was mainly due to the decreased cake layer resistance (Rc). The permeability of the biofouling layer improved after UV and VUV application, as evidenced by the increased surface porosity and decreased thickness. The contents of loosely bound extracellular proteins (LB-PN) and tightly bound extracellular proteins (TB-PN) in the biofouling layer were reduced after UV and VUV irradiation. The decreased LB-PN and TB-PN improved the interfacial free energy between the fouling itself and between the fouling and the membrane, which contributed to the reduction of interfacial cohesion and adhesion, resulting in a looser and thinner biofouling layer and a cleaner membrane. The concentration of protein-like material in the membrane tank decreased after UV and VUV irradiation, significantly altering the bacterial community structure on the membrane surface (Mantel's r > 0.7, p < 0.05). The changes in the metabolic state were responsible for the differences in the LB-PN and TB-PN contents. The inhibition of "Alanine, aspartate and glutamate metabolism" and "Glycine, serine and threonine metabolism" reduced amino acid biosynthesis, which restricted the secretion of LB-PN and TB-PN. Critical genera in the Proteobacteria phylum, such as Hirschia, Rhodobacter, Nordella, Candidatus_Berkiella, and Limnohabitans, were involved in metabolite transformation. Overall, the in-situ application of UV and VUV can be an effective alternative strategy to mitigate membrane biofouling, which would facilitate the practical application of biofiltration-facilitated GDM systems in drinking water treatment.

Keyword ：

Metabolic pathway Metabolic pathway Gravity-driven membrane (GDM) Gravity-driven membrane (GDM) Ultraviolet (UV) Ultraviolet (UV) Interface free energy Interface free energy Extracellular polymeric substances (EPS) Extracellular polymeric substances (EPS) Vacuum ultraviolet (VUV) Vacuum ultraviolet (VUV)

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GB/T 7714 Feng, Jianyong , Li, Xing , Lu, Zedong et al. Enhanced permeation performance of biofiltration-facilitated gravity-driven membrane (GDM) systems by in-situ application of UV and VUV: Comprehensive insights from thermodynamic and multi-omics perspectives [J]. | WATER RESEARCH , 2023 , 242 .
MLA Feng, Jianyong et al. "Enhanced permeation performance of biofiltration-facilitated gravity-driven membrane (GDM) systems by in-situ application of UV and VUV: Comprehensive insights from thermodynamic and multi-omics perspectives" . | WATER RESEARCH 242 (2023) .
APA Feng, Jianyong , Li, Xing , Lu, Zedong , Yang, Yanling , Zhou, Zhiwei , Liang, Heng . Enhanced permeation performance of biofiltration-facilitated gravity-driven membrane (GDM) systems by in-situ application of UV and VUV: Comprehensive insights from thermodynamic and multi-omics perspectives . | WATER RESEARCH , 2023 , 242 .
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一种比较不同天然有机物对抗生素光催化去除抑制程度大小的方法 incoPat zhihuiya
专利 | 2023-01-08 | CN202310005419.5
周志伟 | 张睿鑫 | 李星
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Abstract ：

一种比较不同天然有机物对抗生素光催化去除抑制程度大小的方法，属于水处理技术领域。将光催化材料投入到抗生素及天然有机物(NOM)复合溶液中，首先进行暗吸附达到吸附平衡，后续进行光催化氧化反应达到光催化氧化平衡，在吸附平衡和光催化氧化平衡后分别测量抗生素的浓度，计算光催化氧化速率常数k值；最后将k值与天然有机物(NOM)三项指标分别拟合，得到抗生素光催化氧化速率常数k值与天然有机物(NOM)特征紫外吸光度(SUVA)、荧光指数(FI)和E2/E3值之间的关系，进而判断出不同天然有机物对抗生素光催化氧化抑制程度的强弱，达到比较不同天然有机物对抗生素光催化去除抑制程度大小的目的。

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GB/T 7714 周志伟 , 张睿鑫 , 李星 . 一种比较不同天然有机物对抗生素光催化去除抑制程度大小的方法 : CN202310005419.5[P]. | 2023-01-08 .
MLA 周志伟 et al. "一种比较不同天然有机物对抗生素光催化去除抑制程度大小的方法" : CN202310005419.5. | 2023-01-08 .
APA 周志伟 , 张睿鑫 , 李星 . 一种比较不同天然有机物对抗生素光催化去除抑制程度大小的方法 : CN202310005419.5. | 2023-01-08 .
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一种高效评选粉末活性炭吸附有机物性能指标的方法 incoPat zhihuiya
专利 | 2023-01-07 | CN202310022372.3
周志伟 | 姚燕燕 | 李星 | 于瑞 Unfold
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Abstract ：

一种高效评选粉末活性炭吸附有机物性能指标的方法，属于水处理技术领域。将粉末活性炭进行预处理后，测定其孔隙结构参数和表面化学官能团性质以及对应的吸附容量，采用R软件计算PAC各理化特性与有机物吸附容量的相关系数值，通过综合分析确定PAC吸附有机物性能的关键指标。选取合适的方法定向修饰PAC理化特性，强化有机物吸附性能，进一步验证评选PAC吸附有机物性能关键指标的准确性。本发明拓宽了PAC应用范围，为PAC定向改性提供理论依据。

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GB/T 7714 周志伟 , 姚燕燕 , 李星 et al. 一种高效评选粉末活性炭吸附有机物性能指标的方法 : CN202310022372.3[P]. | 2023-01-07 .
MLA 周志伟 et al. "一种高效评选粉末活性炭吸附有机物性能指标的方法" : CN202310022372.3. | 2023-01-07 .
APA 周志伟 , 姚燕燕 , 李星 , 于瑞 . 一种高效评选粉末活性炭吸附有机物性能指标的方法 : CN202310022372.3. | 2023-01-07 .
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Fate of sulfamerazine by synchronous adsorption and photocatalysis dependent on natural organic matter properties SCIE
期刊论文 | 2023 , 45 (18) , 3635-3647 | ENVIRONMENTAL TECHNOLOGY
Zhou, Zhiwei | Zhang, Ruixin | Yang, Yanling | Li, Xing | Ren, Jiawei Unfold
WoS CC Cited Count： 2
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Abstract ：

Natural organic matter (NOM) can impede the removal of organic micro-pollutants (OMPs) through several mechanisms, including inner filter effect, competition with the target OMP, and radical scavenging, during synchronous adsorption/photocatalysis of multi-functional composites. In this study, the fate and inhibitory mechanisms of sulfamerazine (SMZ, a model OMP) that occurred in presence of seven different NOM samples (i.e. three standard NOM surrogates, a river water sample, a carbon filter effluent and two different sand filter effluents) during the adsorption/photocatalysis by a composite of Bi2O3-TiO2 supported on powdered activated carbon (Bi2O3-TiO2/PAC, abbreviated as BTP) when exposed to visible light irradiation were revealed. The results indicated that adsorption played a greater attribution than photocatalysis on SMZ removal. The primary impediment to the adsorption and photocatalytic degradation of SMZ was attributed to the presence of terrestrial-derived, humic-like NOM fractions with high aromaticity. The adsorption efficacy of SMZ was weakened by the absorption of NOM and its degradation products onto the BTP surface. The inner filter effect, competition between NOM and SMZ, and radical scavenging were responsible for the reduced photocatalysis of SMZ. In the cases of real water matrices, the presence of inorganic anion and co-existed NOM reduced the removal of SMZ. In summary, the findings of this work offer a comprehensive comprehension of the impact of NOM fractions on photocatalysis, emphasizing the necessity to examine the interplay between NOM and background inorganic constituents in the degradation of OMP via adsorption/photocatalysis.

Keyword ：

inhibition inhibition Bi2O3-TiO2 Bi2O3-TiO2 PAC composite PAC composite multi-functional composite multi-functional composite natural organic matter natural organic matter adsorption and photocatalysis adsorption and photocatalysis

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GB/T 7714 Zhou, Zhiwei , Zhang, Ruixin , Yang, Yanling et al. Fate of sulfamerazine by synchronous adsorption and photocatalysis dependent on natural organic matter properties [J]. | ENVIRONMENTAL TECHNOLOGY , 2023 , 45 (18) : 3635-3647 .
MLA Zhou, Zhiwei et al. "Fate of sulfamerazine by synchronous adsorption and photocatalysis dependent on natural organic matter properties" . | ENVIRONMENTAL TECHNOLOGY 45 . 18 (2023) : 3635-3647 .
APA Zhou, Zhiwei , Zhang, Ruixin , Yang, Yanling , Li, Xing , Ren, Jiawei . Fate of sulfamerazine by synchronous adsorption and photocatalysis dependent on natural organic matter properties . | ENVIRONMENTAL TECHNOLOGY , 2023 , 45 (18) , 3635-3647 .
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Regulated-biofilms enhance the permeate flux and quality of gravity-driven membrane (GDM) by in situ coagulation combined with activated alumina filtration SCIE
期刊论文 | 2022 , 209 | WATER RESEARCH
Du, Peng | Li, Xing | Yang, Yanling | Zhou, Zhiwei | Fan, Xiaoyan | Chang, Haiqing | Liang, Heng Unfold
WoS CC Cited Count： 30
Article has an altmetric score of 1
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Abstract ：

It is a critical challenge for drinking water production when treating algae-contaminated surface water. In this study, the impact of in situ coagulation (C), activated alumina filtration (AA) and their combination (CAA) on the performance of gravity-driven membrane (GDM) was systematically assessed during 105-day operation. The results indicated that pretreatments in particular CAA could effectively enhance GDM flux, and the stable fluxes were increased to 3.1, 4.9 and 8.3 L/(m(2).h) (LMH) for CGDM, AA/GDM and CAA/GDM, respectively when compared to the control GDM (2.0 LMH). Coagulation was beneficial to formation of thick but loose biofouling layer, while AA filtration was effective to retain foulants including extracellular polymeric substances (EPS), organics, total nitrogen and total phosphorus. The CAA/GDM could mostly remove these foulants, and facilitate the proliferation of bacterial genera that could consume EPS, further alleviating membrane fouling. The dif-ference in loosely bound EPS and tightly bound EPS of biofouling layer attributed to the difference of reversible fouling and irreversible fouling, respectively. Morphological observations, variation in functional groups or el-ements further confirmed the difference in biological layers in different GDM systems. The occurrence of specific bacterial genera involving the potential to degrade protein, chitin and other high molecular weight organics was responsible for contaminant removals.

Keyword ：

In situ coagulation In situ coagulation Biofouling layer Biofouling layer Gravity-driven membrane (GDM) Gravity-driven membrane (GDM) Flux stabilization Flux stabilization Bacterial community Bacterial community Extracellular polymeric substances (EPS) Extracellular polymeric substances (EPS)

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GB/T 7714 Du, Peng , Li, Xing , Yang, Yanling et al. Regulated-biofilms enhance the permeate flux and quality of gravity-driven membrane (GDM) by in situ coagulation combined with activated alumina filtration [J]. | WATER RESEARCH , 2022 , 209 .
MLA Du, Peng et al. "Regulated-biofilms enhance the permeate flux and quality of gravity-driven membrane (GDM) by in situ coagulation combined with activated alumina filtration" . | WATER RESEARCH 209 (2022) .
APA Du, Peng , Li, Xing , Yang, Yanling , Zhou, Zhiwei , Fan, Xiaoyan , Chang, Haiqing et al. Regulated-biofilms enhance the permeate flux and quality of gravity-driven membrane (GDM) by in situ coagulation combined with activated alumina filtration . | WATER RESEARCH , 2022 , 209 .
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