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Bacterial cellulose biopolymers: The sustainable solution to water-polluting microplastics
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Researchers developed bacterial cellulose (BC) biopolymer filters as a sustainable alternative to petroleum-based polymer filters used in wastewater treatment plant microplastic removal. BC filters showed high MP capture efficiency and are biodegradable, addressing both microplastic pollution and the environmental costs of conventional synthetic filter maintenance.
Microplastics (MPs) pollution has become one of our time's most consequential issue. These micropolymeric particles are ubiquitously distributed across all natural and urban ecosystems. Current filtration systems in wastewater treatment plants (WWTPs) rely on non-biodegradable fossil-based polymeric filters whose maintenance procedures are environmentally damaging and unsustainable. Following the need to develop sustainable filtration frameworks for MPs water removal, years of R&D lead to the conception of bacterial cellulose (BC) biopolymers. These bacterial-based naturally secreted polymers display unique features for biotechnological applications, such as straightforward production, large surface areas, nanoporous structures, biodegradability, and utilitarian circularity. Diligently, techniques such as flow cytometry, scanning electron microscopy and fluorescence microscopy were used to evaluate the feasibility and characterise the removal dynamics of highly concentrated MPs-polluted water by BC biopolymers. Results show that BC biopolymers display removal efficiencies of MPs of up to 99%, maintaining high performance for several continuous cycles. The polymer's characterisation showed that MPs were both adsorbed and incorporated in the 3D nanofibrillar network. The use of more economically- and logistics-favourable dried BC biopolymers preserves their physicochemical properties while maintaining high efficiency (93-96%). These polymers exhibited exceptional structural preservation, conserving a high water uptake capacity which drives microparticle retention. In sum, this study provides clear evidence that BC biopolymers are high performing, multifaceted and genuinely sustainable/circular alternatives to synthetic water treatment MPs-removal technologies.
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Researchers evaluated bacterial cellulose hydrogel as a biodegradable flocculant to remove microplastics from contaminated water, finding that it effectively aggregated and settled plastic particles under optimized conditions. This plant- and bacteria-derived natural material offers a promising eco-friendly approach for treating microplastic-contaminated wastewater without adding chemical pollutants.
Advancing bacterial cellulose biopolymers & hydrogels to remediate microplastic pollution
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Researchers developed bacterial cellulose biopolymers and hydrogels as biodegradable alternatives to fossil-fuel-based filters for removing microplastics from wastewater, optimizing operational parameters using response surface methodology. Results showed removal efficiencies of up to 99% for concentrated MP suspensions, with flow cytometry, electron microscopy, and ATR-FTIR confirming the flocculation mechanism and the potential for large-scale industrial application.
Efficacy of bacterial cellulose hydrogel in microfiber removal from contaminated waters: A sustainable approach to wastewater treatment
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Researchers developed a bacterial cellulose hydrogel made from unused cellulose remnants and tested it as an eco-friendly filter for removing microfibers from contaminated water. The hydrogel achieved an average removal rate of nearly 94 percent and retained the captured fibers well, releasing only about 8 percent after washing. The study presents this bio-based approach as a sustainable and effective alternative for tackling microfiber pollution in wastewater.
Sustainable approach for microfibres removal: bacterial cellulose residues
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Bacterial cellulose residues — a byproduct of industrial fermentation — were tested as a low-cost material for capturing synthetic microfibers from wastewater. The material showed promising ability to bind and remove fibers, which are the most common microplastic type in domestic wastewater. Using this sustainable byproduct for microfiber removal could offer an inexpensive way to reduce microplastic emissions from laundry and textile industries.
Applications of regenerated bacterial cellulose: a review
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This review examines bacterial cellulose as a sustainable alternative to synthetic polymers that contribute to microplastic pollution. Bacterial cellulose is biodegradable, renewable, and has strong mechanical properties, making it suitable for packaging, textiles, and biomedical applications. The study highlights recent advances in processing techniques that could make bacterial cellulose more commercially viable as a replacement for plastics in everyday products.
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