Less Steps, More Years

Innovative Microfiltration, Efficiency Beyond Limits.

From New Energy to Chemical, Proven Across Industries

With 5,000+ systems deployed worldwide, empowering higher yields and greener production.

Since 1986-Committed to Excellence in Microfiltration

For decades, our innovation in microfiltration has been focused on solving complex filtration challenges.

Mastering Microfiltration for 40 Years

Zhejiang Dongou Filter Manufacturing Co., Ltd.

Founded in 1986, Dongou specializes in polymer-based and surface layer filtration technology to deliver unmatched performance in temperature resistance, chemical compatibility, and long-term durability.

From integrated filtration–washing units and reaction–concentration systems to continuous crystallization and activated carbon regeneration, we provide tailored solutions that drive productivity and sustainability across industries.

We offer more than a product; we provide a precision-driven process. With our advanced filtration selection technology and comprehensive laboratory trials, we precisely tailor solutions to address diverse application requirements.

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Precision Microfiltration Across Industries

From battery material to chemicals, pharmaceuticals, and mining, Dongou's microfiltration technology ensures precise particle control and long-lasting performance. Explore our solutions below.

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From pilot-scale trials to full-scale industrial installations, Dongou's filtration systems have earned the trust of global clients through reliable performance, engineering precision, and proven results across diverse industries.

5000+

Deployed Systems

5+

Regions

Largest-ever Installation Volume per Contract

1000+

Units

Cases

Why Iron Phosphate Washing Is the Critical Bottleneck in Your LFP Battery Supply Chain—3 Hidden Costs of Impure Precursors

Inefficient washing undermines your LFP's potential. Learn how modern filtration safeguards secure purity, efficiency, and compliance.

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How an Integrated Reactor Filter Inherently Elevates Plant Safety & Sustainability — 3 Advantages of the Integrated Reactor Filter

Redesigning the process from the ground up to eliminate risks and waste in a closed-loop system—by design, not by added

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Engineering the Impossible: What is the Optimal Design for Continuous Glyphosate Production

The core design philosophy that transforms the traditional batch sequence into a seamless, automated continuous manufacturing system.

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The All-in-One Revolution: How We Reimagined Glyphosate Production

Beyond “Reactor + Centrifuge” for safer, smarter, and more profitable operations.

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What Are the Critical Filtration Points in Titanium Dioxide Production? – Sulfate vs. Chloride Processes

Titanium dioxide production relies primarily on two industrial routes—the sulfate process and the chloride process.

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Dongou Microfiltration: Optimizing Bayer Process Filtration for High-Purity Alumina and Lithium Recovery

In Bayer process alumina production, effective solid-liquid separation is crucial to maintaining product quality, reducing chemical consumption.

News

News

National Standard Led by Dongou Microfiltration Officially Released

The national standard for Polymer Sintered Microporous Membrane Elements, GB/T 47900-2026, has been officially released, with Zhejiang Dongou Filter Manufacturing Co.,

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Professor Heba of Egyptian NRC Visits Dongou Microfiltration for Technical Exchange

Lishui, China – July 9, 2026 – A technical delegation from Egypt’s National Research Centre (NRC), led by Professor Heba and

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Organic Tubular Microporous Membrane for Hydrometallurgical Separation Passes Major Technical Appraisal

Dongou Microfiltration leads industry breakthrough with internationally advanced filtration technology Lishui, China – March 27, 2026 – The technical appraisal

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On the Green Pitch, For the Community: Dongou Microfiltration Supports Local Football

On January 2, the regional football league officially kicked off with its opening match at a local sports center.

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Dongou Microfiltration Named 2025 Zhejiang Provincial Water-Saving Enterprise

We are proud to announce our official recognition as a Zhejiang Provincial Water-Saving Enterprise for 2025.

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Dongou Microfiltration Successfully Completed ASME Recertification Audit, Strengthening International Market Presence

From December 11 to 12, 2025, experts from the American Society of Mechanical Engineers (ASME) joint inspection team visited Zhejiang

Events

API China

May 13–15, 2026

National Exhibition and Convention Center (Shanghai)

The 18th China International Battery Fair (CIBF 2026)

May 13–15, 2026

Shenzhen International Convention and Exhibition Center

IE Expo Shanghai

April 13-15, 2026

Shanghai New International Expo Centre

ICBR 2026

9-11 Sep, 2026

Berlin, Germany

2026 FILTECH

30 June to 2 July 2026

KoelnMesse, Cologne, Germany

7th International Congress Lithium Latin America

4–5 June 2026

Buenos Aires, Argentina

Dongou - Your Partner in Microfiltration Solutions