Project Background
Kangrong Industrial is a high-end cosmetics manufacturer in Guangdong, China. To ensure product quality and production safety, the company requires extremely high standards for process water.
Although its existing water treatment process was relatively complete, bacterial colony control remained a challenge and affected product quality and stability.
Equipment Selection and Treatment Process
To solve these problems, the company adopted an advanced purified water treatment system with the following process:
1. Pretreatment
- Sand Filter: Removes suspended solids, colloids, organic matter, and other impurities.
- Precision Filter: Further removes fine particles and protects downstream equipment.
2. Core Purification
- Reverse Osmosis (RO) System: Removes most dissolved salts, heavy metals, organic contaminants, bacteria, viruses, and other impurities.
- EDI System (Optional): Further removes ionic contaminants after RO treatment to improve water purity and achieve ultrapure water quality where required.
3. Post-Treatment and Disinfection
- Microporous Filter: Removes fine particles and improves final water quality.
- UV Sterilization: Uses ultraviolet light to inactivate microorganisms and control bacterial contamination.
Application Results
The purified water system delivered several key benefits:
- Improved Water Quality: The treated water met the requirements of cosmetics production.
- Effective Bacterial Control: UV sterilization helped resolve bacterial colony issues and improve product safety.
- Lower Long-Term Operating Costs: Although the initial investment was relatively high, the system reduced water treatment costs and improved production efficiency over time.
Problem and Solution
During operation, the company experienced a reduction in purified water output.
After analysis, the issue was traced to an inlet water temperature below the system’s design value. To solve the problem, the feed water temperature was increased using equipment such as a plate heat exchanger or steam coil, restoring the expected water production capacity.
Conclusion
This project demonstrates the importance of a reliable purified water system for cosmetics manufacturing. By combining pretreatment, reverse osmosis, optional EDI purification, precision filtration, and UV sterilization, the system effectively improved process water quality and controlled microbial contamination.
Regular maintenance and proper operating conditions are also essential for maintaining stable long-term system performance.