According to the practical application, roll-type equipment can© be filled with microfiltration membrane, ultrafiltration membrane, nano-filtration memb₽rane and reverse osmosis membrane.
 
Main characters of roll-type membrane:

High packing density and low unit area membrane cost;

Low operating pressure is and low demand for mechanical components such as pumps;

Narrow component membrane spacing and flow path, which forbid the enter  of suspended solids and at the same time need high standard for the pretreatmen∞t of the feed solution.
 
Applications of Roll-type membrane equipment:

Biological fermentation: antibiotics, vitamins, amino acids (decolorization, protein' movement, concentrated deashing), etc.

Food and beverage: oligosaccharides, starch and sugar separa$tion and purification, monosodium glutamate and decolorization, clarification and decolo¥rization of drinks, etc.

Reuse of electrophoretic paint wastewater: vehicle and instrument industry.

Pharmaceutical (desalination of antibiotic resin solution, concentration of vitamins).

Dye (desalting concentration, substitution for salting out and acid precipitation).

Mother liquor recovery (movement of MSG mother liquor,  glucose crystallization mother liquor, etc.).

Water treatment (printing and dyeing wastewater treatment, water reuse, ultεra-pure water preparation).

Recovery of acid and alkali (column washing acid of pharmaceutical industry, alkali waste§, chemical industry acid waste, alkali).

Food industry: formula water, production water preparation.

Beverage industry: formula water, production water, washing water preparation.

Pharmaceutical industry: water production for technology, preparation, washing, injeβction, and sterile water.

Chemical industry: production of water, wastewater tre​atment.

Power industry: boiler makeup water, cycling cooling water.

Electronics industry: semiconductor industry ultra-pure water, integrated c‍ircuit cleaning water, formula water.

Drinking water projects: pure water preparation, dr∏inking water purification.

Petrochemical: injection water of oilfield and enhanced wastewater treatment.

Sea water and brackish water desalination: water for life and industry use at isla≤nd and costal area as well as ships and oilfields.