Microplastic Filtration Systems: Companies, Startups & Research

Named companies include Glacier Fresh Corporation and Aquasana Inc., which offer residential water-filtration products, and LifeStraw SA, a corporate organization active in the field. The data also identify Captoplastic, S.L. among patent holders. These examples span household filtration and intellectual property; the available facts do not establish that every company sells a product specifically certified for microplastic removal.

The named startups are Proximare Health and Greenertech. Proximare Health is pursuing extracorporeal blood purification and has a planned paired study of double-filtration plasmapheresis; Greenertech participated in validation of a wastewater prototype. The facts do not rank their commercial prospects, and the two examples address different use cases rather than directly competing filtration products.

Chinese Academy of Sciences CAS, the University of Bonn and Hohai University are among the named research leaders. CAS developed cationic cellulose filter paper; the University of Bonn is working on a fish-inspired laundry-wastewater filter; and Hohai University studies particle transport and retention in porous media. Ocean University of China and the University of Bath also research membrane separation.

FACTS reports $19,360,892 in grants across 24 grants since 2020, alongside 13 funding rounds totaling $2,990,469,599. These are the recorded aggregates associated with the topic, not a verified estimate of investment exclusively dedicated to microplastic filtration. Individual funding entries should be checked to confirm their relevance and the recipient’s specific project.

P-Tech is the top listed patent holder, with 3 patents. The Autonomous University of Madrid, SK Innovation Co., Collins Aerospace, Southern Marine Science and Engineering Guangdong Laboratory, MANNHUMMEL LIFE science & ENVIRONMENT HOLDING SINGAPORE PTE. LTD. and Captoplastic, S.L. each have 2 listed patents. These counts describe the holders shown in FACTS.

Patent activity declined by 57.1% in the last 12 months compared with the previous 12 months, while FACTS lists 50 patents in the 24-month window. This contrasts with publication activity: the field recorded 656 publications in the last year, up 17.1%. The figures suggest that recent activity is more publication-led than patent-led.

Recent developments include cationic cellulose filter paper from Chinese Academy of Sciences CAS, hemp- and jute-cellulose nanopapers studied by Deakin University, and silanized sand investigated by the University of Oulu and University of Helsinki, all reported in September 2026. In October 2026, news reported a biodegradable 3D-printed filtration column from the University of Waterloo. Together, these point to material innovation and new system designs.

The main approaches are screen and granular media, membrane separation, fibrous filter media, coagulation and adsorption, and magnetic and electrostatic capture. Screens and media physically retain particles; membranes provide a size-selective barrier; fibers combine interception with surface capture; coagulation and adsorption condition or bind particles; and magnetic or electrostatic systems use force-based capture. Each has different fouling, operating and residual-management trade-offs.

The United States leads the country figures with 2,695 documents, followed by China with 1,146 and the United Kingdom with 936. Germany is also active, with 864 documents. These figures indicate where recorded research and innovation activity is concentrated; they do not by themselves measure commercial deployment or the performance of filtration systems.

Applications include residential drinking water, laundry effluent, municipal wastewater, stormwater and runoff, and industrial process water. Residential drinking water has 569 listed documents, while laundry effluent has 249 and municipal wastewater has 198. Laundry-effluent activity grew by 89.5% in the recent comparison period, supporting interest in filters that capture fibers at washing machines as well as treatment-stage removal.