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INNOVATIVE AND HIGH-PERFORMANCE FLUID SEPARATION SOLUTIONS
COMPLETE PRODUCTION LINE SOLUTIONS FOR LIQUID BEVERAGES
COMPLETE PRODUCTION LINE SOLUTIONS FOR LIQUID BEVERAGES
milk bananer
COMPLETE PRODUCTION LINE SOLUTIONS FOR DAIRY PRODUCTS
植物bananer
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
Liquid Separation system
Concentrated Fruit Juice Production Line
Juice Beverage Production Line
Instant Coffee Production Line
Instant Coffee Production Line
Bottled Water Production Line
Bottled Water Production Line
Dairy Product Production Line
Dairy Product Production Line
Plant Extraction
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.
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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.
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Enterprise Advantages

Advantage-1

Technical Innovation

The annual R & D investment accounts for 15% of the total revenue, ensuring technological leadership.
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Advantage-2

Professional Team

The employees are engineering and technical staff, with each having an average of more than 15 years of industry experience.
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Advantage-3

Product Performance

The purity of the extract can reach over 98%, and the recovery rate of active ingredients can be increased by 30%.
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Advantage-4

Customer Service

Customer inquiries are replied to within an average of 1 hour, and after - sales problems are resolved within 24 hours.
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News
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Membrane Concentration Technology for Whey Protein Purification & Enrichment

Room‑temperature ultrafiltration membrane technology for whey protein concentration. Keep protein activity, save energy, produce WPC/WPI from dairy whey by‑product.

Whey protein filtration.jpg

Membrane Separation Technology for Animal Blood Enzymatic Hydrolysate Clarification & Purification

Ultrafiltration membrane separation technology for animal blood enzymatic hydrolysate clarification. Physical room‑temperature removal of colloid & suspended impurity, protect bioactive peptide for feed & biochemical raw material production.

Blood Enzymatic Hydrolysis.jpg

Application of Membrane Separation Technology in Plant Polysaccharide Extraction

Traditional polysaccharide purification suffers from high temperature damage and high solvent consumption. Membrane separation technology performs clarification, de‑impurity and concentration under ambient temperature. It protects polysaccharide activity, lowers ethanol consumption and supports industrial scale‑up. Proper pretreatment and suitable molecular‑weight cutoff are necessary to relieve membrane fouling caused by high‑viscosity polysaccharide liquid.

extraction of polysaccharide.jpg
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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
Copyright © 2025 Doupu (Sichuan) Biotechnology Co., Ltd. All Rights Reserved.