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Raw Water

Treatment

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Overview

Raw water treatment facility that improves turbidity and removes organic matter, color, taste, etc. through the physical and chemical process of coagulation, floculation, sedimentation, filtration, adsorption, etc. of river water and etc.

Flow Diagram

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Our Solutions

Clarifier

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Technical Features

Applications

​      * Sludge Recirculation Type

         Apply a coagulant aid to the raw water to

         floculate the impurities and mix them with

         the newly introduced water to grow into a

         large floc. Some of the larger flocs that

         have grown continue to circulate in the

         compound, some periodically take out, and

         clean treated water is released through the

         trough of the water surface.

     * Sludge Blanket Type

        If impurities that cause turbidity are raised

        from the bottom of the sedimentation tank by

        injecting coagulant aid into the raw water

        and growing into a large floc, the large floc is

        balanced with the rising speed and stopped in

        the water to form a layer of sludge blanket.

        At this time, the water separated by solids

        passes through the blanket layer, and is

        filtered through the trough of the water

        surface.

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  • Suitable for raw water conditions with small changes in turbidity and water temperature.

  • Suitable for raw water conditions with  little variation in water flow rate.

  • Clarifier that combines coagulation, floculation and sedimentation tanks into one.

  • Clarifier is a device that injects a coagulant aid into the raw water to remove turbidity-causing impurities such as mud particles, organic matter, bacteria, colloid, etc., so that the sludge produced after the floculation of suspended solids is deposited and gets clean treated water.

Pressure Sand Filter

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Technical Features

Applications

  • ​Pressure sand filter is a Granular Loose Media Depth Filter that captures particulates in porous materials. The filtration rate is 5 to 15 m/h, the Sand efficient size is 0.5 to 1.2 mm, and the Bed depth is 0.6 to 1.9 m.

  • Backwash process starts at 0.5 kgf/cm2 pressure drop on the filter bed, and the backwash flowrate is pumped backwards through the bed until it is fluidized and has expanded by up to about 30%.

  • Food & beverage

  • Drinking water system

  • Pre-treatment for demi. System

Multimedia Filter

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Technical Features

Applications

  • Three or more media in one filter vessel and typically anthracite, sand, and garnet to be used as Media.

  • More effective in removing turbidity and longer operating periods between backwash cycles than single-layer sand filter.

  • Remove particles of size 10 μm to 25 μm while single-layer sand filter can generally remove particles of size 25 μm to 50 μm

  • Food & beverage

  • Medicine process

  • Pre-treatment for demi.system

  • Swimming pools

Activated Carbon Filter

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Technical Features

Applications

  • Effective removing of various organic substances, taste, smell, color, residual chlorine contained in the water through absorption and filtration of activated carbon.

  • Easy operation management with automatic operation configuration.

  • Impossible to remove dissolved minerals and there is a possibility of microbial growth.

  • Food & beverage

  • Medicine process

  • Pre-treatment for demi.system

  • Swimming pools

Reverse Osmosis Unit

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Technical Features

Applications

  • Membrane separation process to separate and remove low molecular weight organic matter and dissolved salts within 0.001μm in size.

  • The Membrane module type includes plate & frame type, tubular type, hollow fiber type, and spiral-wound type for use in accordance with the conditions of the treated raw water.

  • Membrane materials to be selected in consideration of the chemical composition, temperature conditions, pH, etc. of the raw water and module type to be selected in consideration of the solid concentration, viscosity, and pressure loss of the raw water.

  • Seawater desalination

  • Raw water treatment & waste water reuse

Water/Chemical Storage Tank

Applicable Tank Type

Applicable 

Materials

  • Cone Roof Tank

  • Horizontal Cylindrical Tank

  • Rectangular Tank

  • Carbon Steel with Epoxy Coating

  • Carbon Steel with FRP Lining

  • Carbon Steel with PTFE Coating

  • Carbon Steel with Rubber Lining

  • Stainless Steel 304

  • Stainless Steel 316

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Clarifier
Sand Filter
Multimedia Filter
Activated Carbon Filter
Reverse Osmosis Unit
Water/Chemical Storage Tank
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