Bipolar Membranes-Bipolar Membranes-Hangzhou Create Environment & Energy Technology Co

CN EN KR JP

TOP

consultation：

191 0679 9768

191 5768 9268

Bipolar Membranes

PRODUCT

Membranes & Components Membrane Module

Tel-Phone

Project Cooperation

19106799768
19157689268

【Product Overview】

Bipolar membranes are typically composite ion-exchange membranes formed by laminating cation-selective and anion-selective exchange layers.

【Fundamental Principles】

When electricity field is applied across a bipolar membrane (with the anion-exchange layer facing the anode and the cation-exchange layer facing the cathode), H2O dissociates into OH⁻ and H⁺ within the interfacial layer. These ions then migrate through their respective layers, serving as on-demand sources of H⁺ and OH⁻.

【Product Parameters】

Model	BPX
Mechanical Strength	High
Water Content (%)	20~30
Wet Thickness (mm)	0.15~0.25
Transmembrane Voltage (V)	＜2
Dimensions	Customized According to Requirements

【Product Advantages】

Exceptional Mechanical Strength

Breaks technological monopolies, ensuring technical autonomy and supply chain security.
Low Energy Consumption

Core to process energy efficiency, significantly reducing operating costs.
Extended Service Life

Guarantees stability and durability for industrial applications.
50% Higher Alkali Production Concentration

Flexible configuration & selectivity compatible with both cation and anion exchange membranes, offering customizable concentrations and selective adaptation.

【Water quality conditions】

【Application Fields】

Chemical and Environmental Protection Industry

Production and Recovery (Resource Utilization) of Organic Acids：In the production of various organic acids (e.g., lactic acid, gluconic acid, amino acids, citric acid) during fermentation, corresponding organic acid salts (e.g., sodium lactate) are generated. Bipolar membrane electrodialysis can directly convert these organic acid salts into pure organic acids and alkali (NaOH). The recovered alkali can be reused to adjust pH in the fermentation process. This enables acid regeneration and alkali recycling, eliminates calcium sulfate waste sludge at the source, and significantly reduces pollution and costs.

Regeneration of Waste Gas Absorption Liquids：Facilities like factories and power plants use alkaline solutions (e.g., NaOH) to scrub and absorb acidic gases (e.g., SO₂, CO₂, H₂S) from flue gas, resulting in waste streams like sodium sulfate or sodium carbonate. Bipolar membrane electrodialysis can regenerate these waste salt solutions into acid and fresh alkali. The regenerated alkali can be recycled for continuous gas absorption, achieving absorbent regeneration and greatly reducing operating costs and disposal challenges.

Zero Liquid Discharge (ZLD) Wastewater Treatment：industries such as coal chemical and pharmaceuticals produce high-salinity wastewater. Traditional evaporation and crystallization are costly and generate mixed salt hazardous waste. Bipolar membrane electrodialysis can convert mixed salts (e.g., NaCl, Na₂SO₄) in wastewater into corresponding acids (HCl) and alkalis (NaOH). The produced acid and alkali can be reused for pH adjustment or other process requirements within the plant, enabling salt resource recovery and achieving true zero liquid discharge.
Food and Beverage Industry

Juice Acidity Adjustment:Some juices (e.g., citrus juices) with excessive acidity require deacidification, while others need acidification to improve flavor or stability. Bipolar membrane electrodialysis can selectively remove specific acids (e.g., citric acid) from juice, Alternatively, it can directly introduce H⁺ ions without introducing foreign ions, thereby maximizing the preservation of the juice's natural flavor and quality.
Biotechnology and Pharmaceutical Industry

Separation and Purification of Enzymes and Antibiotics：Many biological products (e.g., proteins, enzymes, antibiotics) exhibit optimal stability or are most readily precipitated and separated near their isoelectric point, requiring precise pH control. By utilizing bipolar membrane electrodialysis to generate H⁺ or OH⁻ ions in site within the system, the reaction environment's pH can be adjusted with extreme precision and gentleness. This avoids product inactivation caused by localized over-acidification or over-alkalization, significantly improving recovery rates and product quality.
Energy Sector

Flow Batteries：In novel pH-differential flow batteries, the bipolar membrane serves as the core component. This technology utilizes the proton concentration difference between solutions of varying pH to generate electricity. Here, the bipolar membrane plays a critical role in maintaining the essential pH gradient and preventing cross-mixing of electrolytes.

191 0679 9768 191 5768 9268