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Hitachi Infrastructure Systems (Asia) Pte. Ltd.

Our advanced drinking water treatment systems support the supply of good-tasting water.


In recent years, the pollution in rivers and lakes has become increasingly worse, and it has become necessary throughout Japan to take measures toward securing a stable supply of tap water and supplying good-tasting water. Chlorine has traditionally been used as a disinfectant in drinking water treatment plants. However, there is concern that the chlorinated organic compounds that occur as a result of reactions between chlorine and organic matter cause cancer, and the use of chlorine has become controversial. Also, algae occur in the summer, and if the amount of chemicals in the water is increased in closed water regions where the tap water has an odor, there will be an increase in dissolved matter, which will lead to an even worse taste. We provide advanced drinking water treatment systems with the aim of supplying good-tasting water in response to these problems.


  1. Powdered activated carbon injection system
    This system uses the adsorption effect of activated carbon to remove abnormal odors and tastes as well as organic matter.
  2. Biological treatment system
    The system sends air into a biological oxidation tank, creates a swirling flow in the tank, efficiently uses special contact material to cause the raw water and air to come into contact with each other, and breaks down the dead matter. This is effective for removing ammoniacal nitrogen.
  3. Ozone treatment systems
    Ozone generated by an ozone generator has a strong oxidation capability that produces excellent results for breaking down organic matter in water and removing odors and colors.
  4. Granular activated carbon systems
    These systems use the adsorption effect of granular activated carbon to produce excellent results for removing odors and colors. Also, if this system is combined with the ozone treatment system, it has the effect of biological activated carbon, and is particularly appropriate for controlling the generation of chlorinated organic compounds.

(in-house comparison)

System Flow

This is a flow chart for applying an advanced treatment system to an existing drinking water treatment flow.

Image: Advanced drinking water treatment system flow chart example
Advanced drinking water treatment system flow chart example

Fields of application

  • Drinking water treatment plant