Urban Water Circulation

Tree Box Filter


Korea's first green technology certification in LID field!!

  • Certification Number : GT-18-00453
  • Certification details : Tree Box Filter, Pretreatment tank, Vegetation soil for LID (Low Impact Development)
  • Technical name : Non-point pollution source purification technology through wooden filter box with improved pre-treatment function


A facility that reduces pollutants contained in rainfall runoff by reclaiming boxes planted with trees or large shrubs and adsorbing heavy metals by oil decomposition and phosphorus adsorption in the filter tank at the front end and moist soil in the planting part

Schematic diagram of rainwater penetration

  • Tree Box Filter exterior model

  • Rainwater Flow Chart during Rainfall

Extruded Ceramic Panel

It is a product produced by mixing cement, silica sand, and pulp, undergoing a high-temperature and high-pressure nurturing process, and then forming tobermorite through physical and chemical reactions with the source material. A panel with sufficient durability, water resistance and light weight.

Features and Benefits

  • Prevention of groundwater contamination and vegetation protection through high-efficiency treatment of road boiling points
  • Easy maintenance with easy removal of floating matter and replacement of filter media
  • Protects vegetation by quick penetration into the ground and excellent moisture retention, retention and ventilation with a high permeability factor
  • In the pre-treatment tank, a floating material removal network is installed to remove road contaminants and garbage, and after purification of polluted water such as oil components, heavy metals, and deicing agents by Cerapack filled with high-efficiency filter media, rainwater runoff flows into the vegetation section.


After the rain

Pretreatment tank

Inside view of Cerapack module (6 months after installation)

Water quality monitoring

Processing efficiency

BOD T-N T-P TSS Heavy metal
54 68 74 85 82

* Low-impact development (LID) technology element guideline standards

Application examples