Rural Watershed Management

Highly Efficient Constructed Wetland

녹색인증로고

Constructed wetland green technology certification!

  • Certification Number : GT-19-00713
  • Technical name : Underground flow constructed wetland system for reducing non-point pollution sources using inclined plate sedimentation pond and phosphorus adsorption filter media

Summary

Business name Development of bird monitoring and control technology
Period of business 2015. 08. ~ 2018. 07.
Total project cost 5,596 million won (Government contribution: KRW 4,196 million / Private contribution: KRW 1,400 million)
Task performing organization Chungho Environment Development Co., Ltd., Korea Advanced Technology Co., Ltd., Kobe Co., Ltd., Lotus Engineering Co., Ltd., ANM Co., Ltd., Geochang-gun, Seoul City University Industry-Academic Cooperation Foundation
TEST BED 1370, Suwol-ri, Gajo-myeon, Geochang-gun, Gyeongnam, etc.

Facility Specifications

Location Site area Facility capacity Note
1370 Suwol-ri, Geochang-gun, Gyeongsangnam-do About 12,000㎡ About 1,460㎥/day

EADS constructed wetland test bed construction

Inclined plate sedimentation basin

A meritorious official Yeosang

Yeo Sang-jo

EADS SYSTEM

Yeo Sang-jo planting Acorus calamus L.

Function by process

Process Flow rate flow Function Processing mechanism
An inflow manhole Horizontal flow(→) Inflow flow safety shoes
Sloping plate deposit An upward flow(↑) Removal of large particles such as sand Sedimentation
1 Yeo Sang-jo Horizontal Underground Flow(→) Primary phosphorus treatment with general filtration Filtration, filtration / plant adsorption, biodegradation, microbial absorption
2-1 Yeo Sang-jo Vertical downward flow(↓) Secondary phosphorus treatment with high efficiency phosphorus adsorption filter medium filter / plant adsorption, microbial absorption
2-2 Yeo Sang-jo Vertical Upflow(↑)

Phosphorus Removal Mechanism of Constructed Wetlands

Adsorption and filtration by high-efficiency phosphorus adsorption media

Sedimentation in soil, absorption of plants, removal by microorganisms

Processing efficiency

Division Inflow Spill Removal rate Note
BOD(㎎/L) 8.4 1.4 83
COD(㎎/L) 9.8 2.2 78
SS(㎎/L) 27.3 3 89
T-N(㎎/L) 4.39 2.29 48
T-P(㎎/L) 0.594 0.022 96
  • BOD 83%, SS 78%, T-N 48%, T-P 96% treatment effect
  • The outflow water has a constant background concentration regardless of the nature of the inflow water
Continuous operation results - SS
Continuous operation results - TP

Process-specific processing mechanisms

T-P mass balance for each EADS process
Process Inflow load(㎏) Outflow load(㎏) Processing load(㎏) Removal rate(%)
EAD process 170 51 118 70
A sedimentary land 170 85 84 50
1 Yeo Sang-jo 85 69 16 10
2 Yeo Sang-jo 68 51 18 10
T-P Mass balance by Yeo Sang-jo Mechanism/h5>
Process Processing load(㎏) Filtration and precipitation(㎏) /
Contribution rate(%)		 Adsorption of media(㎏) /
Contribution rate(%)		 Absorption of plants(㎏) /
Contribution rate(%)
1 Yeo Sang-jo 16 0.680 / 4.2 9.513 / 58 6.215 / 38
2-1 Yeo Sang-jo 16 0.030 / 0.2 9.460 / 60 6.199 / 40
2-2 Yeo Sang-jo 2 0.002 / 0.1 0.036 / 2 1.890 / 98
  • Most of the removal mechanism in settling paper is done by sedimentation, and the removal mechanism of filter paper consists of adsorption by filter media, filtration, sedimentation in soil, plant absorption, and removal by microorganisms.
  • 1 Total phosphorus removed by filtration or sedimentation of the filter media was 4.2%, adsorption by filter media was 8%, and removal by plant absorption was 37.8%.
  • 2-1 Yeosangjo shows 60.3% adsorption by filtrate and 39.5% absorption by plants, and 2-1 Yeosangjo shows 98% absorption by plants
  • 2-2 Most of the total phosphorus introduced into the filtration area is absorbed by plants planted with dissolved phosphorus