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  Technology development process
  ¡Ý Technology development Support: New product development on purchasing condition
¡Ý Technology development sup port (Small & Medium Business Administration)
¡Ý Technology development Period: Nov. 2005 ~ Oct. 2006
¡Ý Technology development Goal : Elimination of earth and sands among non-point pollution source and sediment or
¡Ý Technology development suppo floating substances and coarse particles of large diameter
¡Ý Technology Characteristics
   - Eliminate more than 95% of particles over 2mm in size
   - Capable of treating more than 3000§©/§³/d Surface loading rate 
   - Prevent screen from shutting down by solids or coarse particles
   - Able to treat large quantity of flow and respond to changes in flow rate and concentration
   - Effective treatment of coarse particles, floats and sediments, oil and grease
 
  V/S (Vortex Screen) system Overview
  ¡Ý V/S (Vortex Screen) is a system that treats non-point pollution source with the application of non-motorized
   non-point pollution source processing technique that utilizes Vortex flow and Screen
¡Ý As inflow pipe installed on Vortex Screen in tangential direction allows water to enter, Vortex flow generated from the
   circulation of water on internal side of Vortex Screen and screen separates and treats particle type floats and coarse
   particles from inflow water
¡Ý The shape of projections of Vortex Screen is protruded inside while that of hole is punched out to the opposite
   direction to water current.
¡Ý With semi-cone shape projection and holes punched out to the opposite direction to water current, it prevents a
   Vortex Screen from shutting down and has the advantage of automatic cleaning of Vortex Screen by the circulating
   water inflow

   
 

   
 
  1. Rainwater enters Vortex Screen through inflow pipe
2. Treat non-point pollutants with Vortex flow and Screen inside Vortex Screen
3. Release the treated water that passed through Vortex Screen
4. Store eliminated particles in the storage tank
5. Automatic cleaning of Vortex Screen by the circulating water inflow when there is water inflow
6. Non-point pollutants separated in the solid storage tank shall be regularly cleaned up
 
  Shape of Vortex Screen
  - Vortex Screen has the shape of semi-cone like projection.
- Vortex Screen is not shut down by pollutants and is self-cleansed by water current.
- Vortex Screen is designed not to create vortex at the end of the semi-cone like projection.
- As inflow water circulates in Vortex Screen, it separates solids and the treated water passes through the screen in
   opposite direction to entering water
 
Interior of Vortex Screen Exterior of Vortex Screen
 
 
  Treatment principle of V/S(Vortex Screen) system

   ¡Ý When it rains, rainwater enters the
      purification system. As it circulates around
      the internal wall of Vortex Screen, it
      generates a vortex. Together with screen,
      the generated vortex treats non-point
      pollutants
 

   ¡Ý The treated water passes through the
      Screen and is released through aqueduct
      in opposite direction to the screen¡¯s internal
      rotation
 

   ¡Ý The non-point pollutants treated in Vortex
      Screen move to the lower part to be stored
      in solid storage tank
 
  ¡Ý non-point pollutants stored in the solid storage tank shall be cleaned up with a vacuum cleaning car
¡Ý Automatic cleaning and shut-down prevention by internal rotation of Screen
 
  Characteristics of V/S (Vortex Screen) system
  ¡Ý Developed to meet the characteristics of domestic non-point pollution source that tends to have drastic flow and
   concentration changes
   - Capable of treating large flow quantity and to respond to change in flow rates and concentration
¡Ý High treatment efficiency
   - Capable of treating more than 99% of coarse particles over 4.5mm in size
   - Capable of treating more than 90% of SS over 2.5 in particle volume 
¡Ý Capable of treating high flow quantity
   - Capable of treating more than 3000§©/§³/d Surface loading rate
   - Capable of treating more than 5000§©/§³/d Surface loading rate at max.
¡Ý Wide applicability
   - Able to use single or total treatment depending on site and flow conditions
¡Ý Excellent in installation and maintenance
   - Easy to install as it is free-casting product
   - Easy maintenance due to its simple internal structure
   - Store eliminated pollutants in the lower solid storage tank then clean them up with a vacuum cleaning car
 
  Site application examples of V/S (Vortex Screen) system
 
 
 
 
  Maintenance of V/S (Vortex Screen) system
  ¡Ý On normal occasions, check clogging state and sediments on pipes by naked eyes without special equipment.
¡Ý To inspect Vortex Screen, check if there is any shut-up spot with naked eyes.
¡Ý The lower solid storage tank is where non-point pollutants and non-point pollution materials are separated and stored.
   After raining, check by naked eyes if stored quantity is extensive, eliminate stored solids using a vacuum cleaning car
 
System in need of maintenance Maintenance methods Maintenance period Expected performance after maintenance
Inflow and outflow pipes Wash out with high pressure water If inflow hole or outflow hole is clogged with sediments Smooth water flow
solid storage tank
 Eliminate solid If solids are excessively stored  
Vortex Screen Cleaning If screen is shut-down Smooth water flow
<Maintenance method >
 
Item Type Clients Remarks
A pilot project for non-point pollution source
Management facility for Sangsa River upstream,
Sooncheon-si		 V/S Sooncheon-si completed
Gwangju Urban area Non-point Pollution
Source Reduction Project		 V/S Gwangju, Gyeonggi-do Drawing execution
Sangsa Lake Water source Green algae prevention
and water quality improvement project drawing execution		 V/S Sooncheon-si Drawing execution
Incheon Chungra district Free Economic Zone
development project		 V/S Korea Land Corporation under review
Haeryong River natural river purification project V/S Sooncheon-si designing
Namyang River Non-point Pollution Source
Reduction Project, Hwaseong-si		 V/S Hwaseong City Hall under review
Seongnam city non-point pollution source
Reduction Project		 V/S Seongnam City Hall reflect feasibility assessment
 
It is planned to apply this technique to Anyang River (Gunpo-si), Hong jae River (Dobong-gu, Seoul), Sihwa industrial complex (Korea Water Resources Corporation ), Yangjae River (Gangnam-gu, Seoul), Changwon River and Nam River (Changwon-si), Gulpo River Waterproof road (Korea Water Resources Corporation ), 00 Complex creation project and many others
 
  ¡Ý A pilot project for non-point pollution source Management facility for Sangsa River upstream for
   Sooncheon-si (V/S, Sooncheon City Hall )
  - Size: D2.5m ¡¿ 3.4mH
- Treatment capacity: 9,000§©/d (5,000m/d Surface loading rate in operation)
- Treatment target: Road non-point pollution source run-offs