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INNOVATIVE AND HIGH-PERFORMANCE FLUID SEPARATION SOLUTIONS

COMPLETE PRODUCTION LINE SOLUTIONS FOR LIQUID BEVERAGES

COMPLETE PRODUCTION LINE SOLUTIONS FOR DAIRY PRODUCTS

COMPLETE PRODUCTION LINE SOLUTIONS FOR PLANT EXTRACTION

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Professional Liquid Separation and Complete Line Expert

Are you seeking the top-notch membrane filtration equipment and customized fluid filtration and separation systems in the industry? You've come to the right place! As innovators in membrane filtration technology, we have accumulated a decade of experience and won the recognition of industries worldwide with our precise solutions.

Our team of experts customizes fluid separation and processing solutions for multiple industries, covering the following fields:
- Membrane separation pilot systems, which are used for research and development as well as small-scale testing.
- Instant solid beverage production lines for the production of powders, concentrated liquids, and functional beverages.
- Plant and animal protein peptide production lines, optimizing extraction and purification processes, applicable to raw materials and the pharmaceutical industry.
- Fruit and vegetable juice, cider, and enzyme production lines, which enhance clarity, shelf life, and production yield.
We maintain a leading position in the dairy products field, optimizing the processing technologies of milk, whey, and derivative ingredients. In the brewing and wine industries, our de-alcohol systems and decolorization filtration skids have set new benchmarks for quality and efficiency. Whether you need to scale up pilot tests, start commercial production, or upgrade existing production lines, we can provide solutions that match your goals, ensuring the reliability, sustainability, and high performance of the systems.

Liquid Separation system

Concentrated Fruit Juice Production Line

Juice Beverage Production Line

Instant Coffee Production Line

Bottled Water Production Line

Dairy Product Production Line

Plant Extraction Production Line

Doupu - A Globally Trusted Provider of Turnkey Engineering Solutions

Doupu is advancing unceasingly in the biotechnology field with a global vision, advanced technologies, and premium services. We look forward to joining hands with more customers to jointly propel the juice beverage production, plant extraction, coffee, and dairy product processing industries to new heights.

Doupu . has won the favor of global customers with its cutting - edge technology and high - quality products. Since its establishment, we have been committed to providing innovative solutions for the juice beverage production, plant extraction, and dairy product processing industries. In particular, we have achieved remarkable results in the research and manufacturing of various separation equipment, such as centrifuges, membrane filtration, and membrane concentration devices.

Our machines, renowned for their outstanding performance and stable quality, have been sold to numerous countries worldwide. From the prosperous markets in Europe and the Americas to the rapidly developing regions in Asia, Africa, and South America, our equipment operates efficiently. Both top - tier research institutions in developed countries and emerging enterprises in developing countries have highly praised our products. These devices play a crucial role in enhancing production efficiency and optimizing product quality for customers around the globe, contributing significantly to every link of the juice beverage production, plant extraction, and dairy product processing industrial chains.

Cooperation Cases

With its core advantages of high efficiency, energy conservation, and environmental friendliness, membrane separation technology has built a bridge of technical empowerment across multiple fields such as water treatment, complete juice beverage production lines, complete milk production lines, and plant extraction. Whether it is the precise purification in basic water treatment, the quality upgrading in the food and beverage industry (such as retaining the flavor of fruit juices and protecting active ingredients in milk), or the efficient purification in plant extraction, its modular design and customized solutions can adapt to the needs of different scenarios. By simplifying processes, reducing energy consumption, and improving purity, it has become a common choice for all industries to enhance quality, reduce costs, and cut emissions, profoundly demonstrating the overall driving force of technological innovation for industrial upgrading.

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Economy is more affordable

The quality is very good, completely consistent with the seller's description, very satisfied, really like it, completely beyond expectations, the delivery speed is very fast, the packaging is very careful and strict, the service attitude of the logistics company is very good, the delivery speed is very fast, very satisfied with a shopping.

Learn More >
Economy is more affordable

The quality is very good, completely consistent with the seller's description, very satisfied, really like it, completely beyond expectations, the delivery speed is very fast, the packaging is very careful and strict, the service attitude of the logistics company is very good, the delivery speed is very fast, very satisfied with a shopping.

The quality is very good, completely consistent with the seller's description, very satisfied, really like it, completely beyond expectations, the delivery speed is very fast, the packaging is very careful and strict, the service attitude of the logistics company is very good, the delivery speed is very fast, very satisfied with a shopping.

Professional Techincal Team

Whether for a single machine or a turnkey project, we are committed to delivering the highest quality service tailored to your needs.

Membrane Separation: Reverse Osmosis Membrane System, Nanofiltration Membrane System, Ultrafiltration Membrane System, Microfiltration Membrane System, Membrane Cleaning Unit, Membrane Module Housing

Water Treatment: Ultrafiltration Unit, Reverse Osmosis System, Multimedium Filter, Activated Carbon Filter, Cartridge Filter, UV Sterilizer, Ozone Generator, Centrifuge, Bag Filter, Vacuum Evaporator

Fruit Juice Beverage Production Line: Fruit Crusher, Press Machine, Centrifuge, Bag Filter, Ultrafiltration Equipment, Vacuum Evaporator, Sterilizer (Plate/Tubular), Homogenizer, Filling Machine, Capping Machine, Labeling Machine

Dairy Production Line: Milk Clarifier, Centrifuge, Pasteurizer, Homogenizer, Bag Filter, Evaporator (Falling Film/Rising Film), Fermentation Tank, Cooling Tank, Filling Machine, Packaging Machine

Plant Extraction Production Line: Extraction Tank, Centrifuge, Bag Filter, Ultrafiltration Membrane System, Nanofiltration Membrane System, Vacuum Evaporator, Spray Dryer, Concentrator, Storage Tank, CIP Cleaning System

Instant Coffee Production Line: Coffee Roaster, Grinder, Extraction Tank, Centrifuge, Bag Filter, Evaporation System, Aroma Recovery Unit, Spray Dryer, Powder Mixer, Packaging Machine
Instant Tea Powder Production Line: Tea Leaf Extractor, Centrifuge, Bag Filter, Ultrafiltration Equipment, Multieffect Evaporator, Spray Dryer, Granulator, Powder Packaging Machine, CIP System

15+

INDUSTRY EXPERIENCE

1000+

SUCCESSFUL PROJECT CASES

30+

INDEPENDENT RESEARCH AND DEVELOPMENT PATENTS

1000+

LONG-TERM CHOICE AND TRUST OF CUSTOMERS

About Us

We have an excellent technical team, which can be designed according to customers requirements.

Enterprise Advantages

Technical Innovation

The annual R & D investment accounts for 15% of the total revenue, ensuring technological leadership.

Professional Team

The employees are engineering and technical staff, with each having an average of more than 15 years of industry experience.

Product Performance

The purity of the extract can reach over 98%, and the recovery rate of active ingredients can be increased by 30%.

Customer Service

Customer inquiries are replied to within an average of 1 hour, and after - sales problems are resolved within 24 hours.

News

09/ 27/ 2026

Membrane Separation Technology for Fermentation Broth Purification and Protein Recovery

09/ 27/ 2026

Reverse Osmosis Concentrated Water Reuse and Reduction Technology

09/ 22/ 2026

Which Membrane Is Suitable for High Solid Content Feed Liquid?

High solid content feed liquid often triggers equipment clogging and frequent fouling during industrial filtration. Picking the wrong filtration module brings low flux, short service life and rising operational cost. This article compares tubular and spiral wound options, explaining why tubular ultrafiltration is preferred for high-solids materials. Its large open flow channel creates strong cross-flow scouring to reduce cake layer buildup. It supports backwash and CIP cleaning, widely used for gelatin, collagen, fermentation broth and juice processing. Proper pretreatment and TMP setup are required for stable running. Contact us to get a customized filtration solution according to your feed liquid parameters.

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WhatsApp: +8619981016856
Landline: +86-0838-845-0038
Telephone: +86-19981016856

E-mail: service@doupubio.com / support@doupubio.com
Address：No.8 Lantian Avenue (29#), Economic Development Zone (North District), Shifang City, Deyang City, Sichuan Province