【Product Overview】

High-Efficiency Resource Recovery Equipment for Mixed Acid-Salt Solutions.

【Core strengths】

This system employs a novel two-compartment bipolar membrane (BPM + AEM) configuration for single-step separation of high-value metal salt wastes containing acids from sectors like metal smelting and food production. By leveraging the synergistic action of the bipolar and anion exchange membranes, it directly achieves efficient acid-metal salt separation and resource recovery, eliminating the need for multi-step precipitation and intermediate concentration. This approach fundamentally prevents membrane fouling caused by the precipitation of metal hydroxides – a common issue in conventional bipolar membrane processes – while simultaneously enabling acid regeneration and metal salt purification, supporting enterprises in achieving zero liquid discharge (ZLD) and closed-loop resource cycling.

【Key Performance & Outcome Data】

【Core strengths】

• Single-Step High-Efficiency Integration
  Utilizes a two-compartment (feed chamber + acid chamber) bipolar membrane (BPM) + anion exchange membrane (AEM) configuration. The feed solution is processed in a single pass, eliminating intermediate steps such as precipitation, solid-liquid separation, and concentration required in conventional processes. This reduces the overall process flow by over 60% and increases equipment compactness by 50%.
• Clog-Free Stable Operation
  H⁺ generated by the BPM migrates directionally to the acid chamber, while anions from the feed solution simultaneously pass through the AEM into the acid chamber to form a pure acid solution. High-value metal ions remain in the feed chamber, forming a high-purity metal salt solution. The entire process prevents the formation of metal hydroxide precipitates, completely solving the membrane clogging issue and enabling unlimited continuous system operation.

• Closed-Loop, Zero-Waste Resource Recovery
  Separation products are directly suitable for reuse: the acid solution meets industrial-grade purity standards, and the metal salt solution maintains a stable pH of 1-5, allowing direct recycling into production processes. No additional chemicals, such as sodium hydroxide solution, are required, reducing raw material consumption by over 90%.
• Low Energy Consumption & Enhanced Economics
  By precisely controlling the voltage and current density, and optimizing the flow rate across the membrane surface, the unit ensures high separation efficiency while minimizing energy consumption, significantly lowering operational costs for enterprises.