A. Definition of the non-point pollution source

Non-point pollution source refers to an emission source that discharges unspecified sewage pollutants from unspecified places such as urban area, roads, farmland, mountainous areas, and construction sites.

B. Types of pollutants

Soil, nutrients, bacteria and viruses, oil and grease, metals (lead, zinc, cadmium, copper, nickel, etc.), organic matter, herbicides, pesticides and fungicides and other impurities

C. Explanation for the reduction principle of non-point pollutant

01.The principle that non-point pollution reduction facilities reduce non-point pollutants, schematic diagram and flow chart of facilities

02.Differentiated technical features from other non-point pollution reduction facilities

Our system provides an excellent efficiency by using high density (HDPE) granulous filter media.

Our filter is a high-density (HDPE) filter media to provide excellent SS adsorption efficiency. Most of facilities use “Geotex non-woven processed fiber” or “fiber ball”, which are excellent fiber materials for removing suspended solids (SS), but fibrous filter media has more disadvantages than advantages.
Fibrous filter media is excellent for temporary removal of suspended solids, but long-term frequent floating debris makes backwashing difficult. There are many problems for maintenance with frequent replacing the filter media due to deformation of the filter media since the floating material residues cause blockage of the filter media by mold, insects, etc, in the underground manhole.
High-density (HDPE) granular filter media, instead of fibrous media, has excellent backwashing and treatment efficiency by using highly efficient media. (SS treatment efficiency over 90% – see Attachment 1)

Good backwashing effect

Our high-density (HDPE) granulous filter media is shaped like a small cylinder with a specific gravity of 0.88, which is lighter than water. As the sludge is adsorbed to the granulous filter media, it becomes heavier than water and sinks to the lower part of the filter layer. It provides good backwashing effect because high-pressure air is intensively injected into the lower part where the contaminated filter media are gathered.

Our facilities are economical

Because high-density (HDPE) backwashable granulous filter media is used, the filter can be used semi-permanently only by backwashing. There is no filter abrasion, and the backwashing efficiency is excellent.
No need to replace the filter media unless otherwise special deformation material enters the rainwater.

D. Structure and characteristics of non-point pollution reduction facilities

The principle that the non-point pollution reduction facility reduce pollution including the overall structure of the facility and the characteristics of the detailed structure inside the facility

E. Economy

The filter provides a high-density (HDPE) granulous filter media with good efficiency and can be used semi-permanently (10 years)
Has longer service life and superior backwashing compared to fiber filters
There is no deformation unless otherwise heat is applied, and no need to change the filter media

F. Convenience of maintenance

ECOVISION21 (ECO-TYPE) filter material is designed for easy maintenance due to high-density (HDPE) and fluid formed in a round shape
The filter is connected to the air line and can be backwashed, so it can be used semi-permanently after washing for about 5 minutes
Settling tank and filtration tank are easy to dredge sediment through vacuum suction (the operator does not need to enter the tank)
The facility is designed to transfer the stagnant water to a sewage pipe or wastewater storage tank through a pump.

■ Filter applied