Water Treatment

The global competition of the water treatment industry is becoming fiercer with the growth of new businesses and the urbanization of developing countries, and the design and operation of system are receiving greater emphasis.

Hansung Cleantech has developed economical and efficient systems for the treatment and supply of industrial water, potable water, demineralized water (demi-water), and ultrapure water. We are supplying water treatment systems and related devices in line with the required level of customers based on our rich experiences in a wide variety of industries including electric and electronic, petrochemical, power, and pharmaceutical industries.

We are striving to carry out the Design, Installation, and Management of efficient and high quality processes to provide more convenience for customers.

  • Water Supply Facilities


    Water supply treatment refers to the general water treatment process including the production of industrial water using raw water, processing and using it for specific purposes, and discharging wastewater. Industrial water can be used only after pre-treatment to remove turbidity and post-treatment for a specific purpose of use. The water treatment process is divided into pre-treatment, make-up, polishing, and reuse. The treatment process and facilities to be used for each step are determined under the concentration of suspended solids in raw water, the purpose of use, the characteristics of the used water, and customer requirements. Based on expertise from numerous projects, designs, and installations, Hansung Cleantech provides the most efficient and effective solution by analyzing the conditions of raw water and processed water as well as customer requirements.

    Composition of Equipment

    • Clarifier
    • Gravity Sand/Multimedia Filter
    • Pressure Filter/Mono Valve Filter
    • Membrane Filter
    • Activated Carbon (A/C) Filter)
    • Reverse Osmosis (R/O)

    Conventional Type Water Supply Treatment Process Diagram

    Alternative Type Water Supply Treatment Process Diagram

    Photos of applied component

  • Demineralized Water & UPW System

    Construction of new power plants in emerging countries with urbanization and industrialization and new businesses in emerging markets are increasing the demand for demi-water and ultrapure water. The ultrapure water field is a growing industry in which technical development is expected because the requirements for water quality are diversifying with the recent advancement of industries. It is also critical for the manufacturing process because quality of ultrapure water and competence of system design are pivotal criteria in yield and quality of products for the applied industries.
    Hansung Cleantech is playing a leading role in demi-water and ultrapure water (UPW) facilities for semiconductors, displays, pharmaceuticals, power plants, steels, and petrochemicals based on rich experiences for 25 years in the design, manufacturing, construction, and startup of demi-water and UPW facilities.


    The UPW system consists of Pretreatment System, Make-up System, and Polishing System. The Pretreatment System refers to a physical filtering system, and there are various types of filtering facilities for different characteristics at sites. The Make-up System refers to a demi-water manufacturing process which acquires demi-water using pretreated (filtered) water in a physicochemical method. The Polishing System acquires the UPW by removing various materials (ions, particles, SiO2, Boron, TOC, DO, bacteria) from water to the desired level using the demi-water obtained from the Make-up System.
    The UPW requires rich experiences in its design because the guaranteed water quality varies by the characteristics of each facility.

    UPW Treatment Process

    1st Generation

    2nd Generation

    3rd Generation

    UPW Treatment Process

    1) Pretreatment Process

    Among the UPW systems, the pretreatment system removes suspended solids (SS), turbidity, color, taste, and odor from the industrial water. This is a process of the traditional pretreatment system. Recently membrane filters such as MF (Micro-membrane Filter) and UF (Ultra Filter) are often used which can be installed in small spaces.

    • The multi-media filter removes SS and turbidity from the water.
    • The A/C filter removes BOD, COD, and TOC from the water to provide water quality appropriate for R/O and MBP operations of the following process.
    2) Demi-water Treatment Process

    The demi-water treatment process produces demi-water by removing anions and cations from the filtered water. The ion-exchange tower has been used traditionally as the demi-water treatment system, but the combination of R/O unit and continuous electro-deionization (CEDI) system is frequently used with the development of the electronics industry.

    • The R/O unit produces the primary demi-water for the production of UPW by removing ions and TOC from the water.
    3) UPW Production Process

    The Polishing System of the UPW production process finally produces the UPW in the level demanded by the client through the removal of particles, dissolved oxygen (DO), total organic carbon (TOC), silica (SiO2), boron, and bacteria from the demi-water produced from the Pretreatment & Make-up System. The role of each device used in the polishing process is as follows:

    • TOC UV removes the TOCs by decomposing them with the ultrashort frequency of 185 nm from the demi-water.
    • Anion & MB-Polisher produces high purity with a minimum resistivity of 18 ㏁•㎝ by removing traces of ions from the demi-water.
    • MDG (Membrane Degasifier) removes CO2 and DO which are dissolved in the demi-water.
    • UF is the final equipment that completes the UPW by removing fine particles from the demi-water of a high purity of minimum 18 ㏁•㎝.

    Photos of applied component

  • Desalination

    Seawater constitutes the absolute majority of water on the Earth, but it is inappropriate to use seawater for living or industries due to its high salinity. Desalination is indispensable for the Middle East where water is scarce, deep-sea fishing vessels where the crew must live on the sea for a long period, and islands where water resource is insufficient. With the global water shortage and the increasing demand for industrial plants, desalination is creating new opportunities and values for homes, industries, and agriculture.


    The R/O (Reverse Osmosis) and ED (Electrodialysis) methods are replacing the conventional distillation method which requires enormous energy and has the problem of pipe corrosion in high-temperature operation. The R/O method consumes much energy compared to ED because it is operated under a high pressure. The selection of a desalination process is determined mainly by the salinity of the raw water. ED is known to be less economical than R/O if the TDS concentration is higher than 5,000 mg/L. R/O is more advantageous than ED if the raw water is seawater, and ED is more economical if the salinity of raw water is lower than the salinity of seawater. The present trend is to use R/O for the desalination systems and much energy is being saved with the development of energy saving pump to restore energy from a high-pressure pump.

    Desalination Flow Diagram

    Photos of applied component