Filtration Technology

1. What are the main filtration technologies available in the market?
Currently, common filtration technologies fall into four categories: Microfiltration (MF), Ultrafiltration (UF), Nanofiltration (NF), and Reverse Osmosis (RO).

1. Microfiltration (MF)

  • Filtration Precision: 0.1–50 microns.

  • Examples: PP filter cartridges, ceramic filters.

  • Function: Basic coarse filtration; removes large particles like sand and rust. Cannot eliminate bacteria, viruses, organic matter, or heavy metal ions.

  • Features: Typically disposable, non-cleanable, requires frequent replacement.

2. Ultrafiltration (UF)

  • Filtration Precision: 0.1–0.001 microns.

  • Technology: Pressure-driven membrane separation (one of the six high-tech innovations of the 21st century).

  • Function: Removes rust, sand, colloids, bacteria, viruses, and large organic molecules while retaining beneficial minerals. Core component in mineral/spring water production.

  • Features: 95%+ water recovery rate; supports flushing/backwashing; longer lifespan.
    [Image Placeholder: UF Diagram]

3. Nanofiltration (NF)

  • Filtration Precision: Between UF and RO.

  • Technology: Electrically powered pressure-driven membrane separation.

  • Function: Lower desalination rate than RO; low water recovery. Primarily used for industrial pure water production.

4. Reverse Osmosis (RO)

  • Filtration Precision: ~0.0001 microns.

  • Origin: Ultra-high-precision membrane separation (U.S., 1960s).

  • Function: Removes nearly all impurities (including beneficial minerals); allows only water molecules to pass. Used for purified drinking water, industrial/medical ultra-pure water.

  • Features: Requires electricity and pressure; low water efficiency.