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Three-dimensional crosslinked nanofiber membrane enhances biocompatibility and wastewater treatment performance in MABR.

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Τίτλος: Three-dimensional crosslinked nanofiber membrane enhances biocompatibility and wastewater treatment performance in MABR.
Συγγραφείς: Yao J; National Engineering Research Center for Safe Disposal and Resources Recovery of Sludge, State Key Laboratory of Urban-rural Water Resource and Environment, School of Environment, Harbin Institute of Technology, China., Ma Y; National Engineering Research Center for Safe Disposal and Resources Recovery of Sludge, State Key Laboratory of Urban-rural Water Resource and Environment, School of Environment, Harbin Institute of Technology, China., Di W; National Engineering Research Center for Safe Disposal and Resources Recovery of Sludge, State Key Laboratory of Urban-rural Water Resource and Environment, School of Environment, Harbin Institute of Technology, China., Li Y; National Engineering Research Center for Safe Disposal and Resources Recovery of Sludge, State Key Laboratory of Urban-rural Water Resource and Environment, School of Environment, Harbin Institute of Technology, China., Zhang T; National Engineering Research Center for Safe Disposal and Resources Recovery of Sludge, State Key Laboratory of Urban-rural Water Resource and Environment, School of Environment, Harbin Institute of Technology, China., Wang W; National Engineering Research Center for Safe Disposal and Resources Recovery of Sludge, State Key Laboratory of Urban-rural Water Resource and Environment, School of Environment, Harbin Institute of Technology, China. Electronic address: wangweirs@hit.edu.cn.
Πηγή: Environmental research [Environ Res] 2026 Sep 15; Vol. 306 (Pt 2), pp. 125215. Date of Electronic Publication: 2026 Jul 08.
Τύπος έκδοσης: Journal Article
Γλώσσα: English
Στοιχεία περιοδικού: Publisher: Elsevier Country of Publication: Netherlands NLM ID: 0147621 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1096-0953 (Electronic) Linking ISSN: 00139351 NLM ISO Abbreviation: Environ Res Subsets: MEDLINE
Imprint Name(s): Publication: <2000- > : Amsterdam : Elsevier
Original Publication: New York, Academic Press.
Ιατρικοί όροι (MeSH): Bioreactors*/microbiology , Wastewater*/chemistry , Nanofibers*/chemistry , Waste Disposal, Fluid*/methods , Waste Disposal, Fluid*/instrumentation , Water Purification*/methods , Biofilms* , Membranes, Artificial*
Περίληψη: The membrane aerated biofilm reactor (MABR) technology holds broad prospects for reducing energy consumption and enhancing efficiency in wastewater treatment. However, the low biocompatibility of traditional membranes results in weak biofilm attachment, remaining a critical bottleneck for its practical implementation. Drawing inspiration from the three-dimensional fibrous cross-linked network of the human extracellular matrix (ECM), an electrospun membrane (EM) with a similar structure was fabricated via electrospinning. We evaluated the wastewater treatment performance and biofilm development across conventional microporous hydrophobic membrane (MHM), dense silicone membrane (DSM), and our fabricated EM. By integrating the physicochemical analysis of membrane materials with the biological assessment of biofilms, we unraveled the unique mechanism through which the EM accelerates biofilm formation and boosts MABR efficiency. The EM reduced the acclimatization period by 27.3% and 33.3% relative to traditional MHM and DSM. Under stable conditions, the EM reactor achieved removal efficiencies of 88.8% for COD and 98.2% for ammonia nitrogen, surpassing the MHM reactor's 86.7% and 94.9% and the DSM reactor's 84.0% and 92.0%, respectively. Moreover, the effluent showed a lower concentration of aromatic small molecules and fulvic acid-like organics. Analysis of the interactions between the three membrane materials and biofilms revealed that the EM possesses a higher thermodynamic binding affinity for proteins (PN) than for polysaccharides (PS). Furthermore, its unique three-dimensional interconnected fibrous architecture offers more attachment sites for EPS and microbes, promoting the formation of thicker and denser biofilms with higher PN/PS ratios. Besides, the principal nitrifiers, Nitrosomonas and Nitrospira, were more abundant on the EM at 6.6% and 5.4%, compared to lower levels on the MHM at 2.1% and 2.3%, and on the DSM at 3.3% and 1.7%. These findings may help address the challenge of poor biocompatibility in MABR membranes, contributing to the development of more efficient wastewater treatment technologies.
(Copyright © 2026 Elsevier Inc. All rights reserved.)
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
Contributed Indexing: Keywords: Biofilm formation; Electrostatic spinning; MABR; Nitrogen removal; Wastewater
Substance Nomenclature: 0 (Membranes, Artificial)
0 (Wastewater)
Entry Date(s): Date Created: 20260708 Date Completed: 20260809 Latest Revision: 20260809
Update Code: 20260810
DOI: 10.1016/j.envres.2026.125215
PMID: 42419616
Βάση Δεδομένων: MEDLINE
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  Data: Three-dimensional crosslinked nanofiber membrane enhances biocompatibility and wastewater treatment performance in MABR.
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  Data: &lt;searchLink fieldCode=&quot;AU&quot; term=&quot;%22Yao+J%22&quot;&gt;Yao J&lt;/searchLink&gt;; National Engineering Research Center for Safe Disposal and Resources Recovery of Sludge, State Key Laboratory of Urban-rural Water Resource and Environment, School of Environment, Harbin Institute of Technology, China.&lt;br /&gt;&lt;searchLink fieldCode=&quot;AU&quot; term=&quot;%22Ma+Y%22&quot;&gt;Ma Y&lt;/searchLink&gt;; National Engineering Research Center for Safe Disposal and Resources Recovery of Sludge, State Key Laboratory of Urban-rural Water Resource and Environment, School of Environment, Harbin Institute of Technology, China.&lt;br /&gt;&lt;searchLink fieldCode=&quot;AU&quot; term=&quot;%22Di+W%22&quot;&gt;Di W&lt;/searchLink&gt;; National Engineering Research Center for Safe Disposal and Resources Recovery of Sludge, State Key Laboratory of Urban-rural Water Resource and Environment, School of Environment, Harbin Institute of Technology, China.&lt;br /&gt;&lt;searchLink fieldCode=&quot;AU&quot; term=&quot;%22Li+Y%22&quot;&gt;Li Y&lt;/searchLink&gt;; National Engineering Research Center for Safe Disposal and Resources Recovery of Sludge, State Key Laboratory of Urban-rural Water Resource and Environment, School of Environment, Harbin Institute of Technology, China.&lt;br /&gt;&lt;searchLink fieldCode=&quot;AU&quot; term=&quot;%22Zhang+T%22&quot;&gt;Zhang T&lt;/searchLink&gt;; National Engineering Research Center for Safe Disposal and Resources Recovery of Sludge, State Key Laboratory of Urban-rural Water Resource and Environment, School of Environment, Harbin Institute of Technology, China.&lt;br /&gt;&lt;searchLink fieldCode=&quot;AU&quot; term=&quot;%22Wang+W%22&quot;&gt;Wang W&lt;/searchLink&gt;; National Engineering Research Center for Safe Disposal and Resources Recovery of Sludge, State Key Laboratory of Urban-rural Water Resource and Environment, School of Environment, Harbin Institute of Technology, China. Electronic address: wangweirs@hit.edu.cn.
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  Data: The membrane aerated biofilm reactor (MABR) technology holds broad prospects for reducing energy consumption and enhancing efficiency in wastewater treatment. However, the low biocompatibility of traditional membranes results in weak biofilm attachment, remaining a critical bottleneck for its practical implementation. Drawing inspiration from the three-dimensional fibrous cross-linked network of the human extracellular matrix (ECM), an electrospun membrane (EM) with a similar structure was fabricated via electrospinning. We evaluated the wastewater treatment performance and biofilm development across conventional microporous hydrophobic membrane (MHM), dense silicone membrane (DSM), and our fabricated EM. By integrating the physicochemical analysis of membrane materials with the biological assessment of biofilms, we unraveled the unique mechanism through which the EM accelerates biofilm formation and boosts MABR efficiency. The EM reduced the acclimatization period by 27.3% and 33.3% relative to traditional MHM and DSM. Under stable conditions, the EM reactor achieved removal efficiencies of 88.8% for COD and 98.2% for ammonia nitrogen, surpassing the MHM reactor&#39;s 86.7% and 94.9% and the DSM reactor&#39;s 84.0% and 92.0%, respectively. Moreover, the effluent showed a lower concentration of aromatic small molecules and fulvic acid-like organics. Analysis of the interactions between the three membrane materials and biofilms revealed that the EM possesses a higher thermodynamic binding affinity for proteins (PN) than for polysaccharides (PS). Furthermore, its unique three-dimensional interconnected fibrous architecture offers more attachment sites for EPS and microbes, promoting the formation of thicker and denser biofilms with higher PN/PS ratios. Besides, the principal nitrifiers, Nitrosomonas and Nitrospira, were more abundant on the EM at 6.6% and 5.4%, compared to lower levels on the MHM at 2.1% and 2.3%, and on the DSM at 3.3% and 1.7%. These findings may help address the challenge of poor biocompatibility in MABR membranes, contributing to the development of more efficient wastewater treatment technologies.&lt;br /&gt; (Copyright &#169; 2026 Elsevier Inc. All rights reserved.)
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  Data: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
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