What are the boundary conditions for preserving essential minerals in spring water while ensuring food safety during bottling?

Chuxin Mingwei’s bottled spring water filling production line uses a dual-membrane NF (nanofiltration) + UF (ultrafiltration) process specifically engineered to retain beneficial minerals while removing microbiological and particulate contaminants—striking a balance between natural composition preservation and food safety compliance.

This approach is suitable only when your source water has already been verified as safe for human consumption (e.g., meets national drinking water standards for raw water) and contains stable mineral profiles without excessive hardness, iron, or manganese that could foul membranes or affect taste. The NF stage selectively rejects divalent ions (like sulfate or calcium above threshold levels) but allows monovalent minerals (such as potassium and sodium) to pass, maintaining the water’s natural character.

Implementation requires: (1) a recent, comprehensive source water quality report; (2) clear definition of target product standards (e.g., GB 8537 for Chinese natural mineral water or equivalent); (3) confirmation of bottle type (e.g., 18.9 L PC barrel or PET bottle) and production capacity (200–1,800 bottles/hour for 18.9 L format). Note that this system is not designed for high-TDS groundwater or surface water requiring heavy pre-treatment.

Service scope includes full engineering design based on your actual water analysis, manufacturing, installation, commissioning, and operator training—but excludes source water acquisition permits or regulatory product registration. If your project involves borderline water chemistry or uncertain mineral stability, we recommend a pilot test prior to finalizing the treatment scheme.

For procurement teams evaluating their first spring water line, share your latest water test report and facility layout with our technical team to confirm compatibility with the NF+UF configuration.