Case Studies — Change Proven in the Field
Change Proven in the Field
Water restoration stories confirmed by before/after evidence at lakes, coastal waters, and streams nationwide.
Seawater Supply Cut Below 1/20, Yet the Only Grade-I Water Quality
Water quality that daily replacement of 9,000 tons of seawater could not control improved after nano-technology adoption. As the water stabilized, intake was reduced step by step and now runs at 300–500 tons per day — evidence of genuine purification rather than dilution. In the 2023 Incheon Institute of Health & Environment survey, it was the only waterway to achieve seawater quality Grade I (Excellent).
From Sea-Lettuce Fields to a Sea with a Visible Floor: A 3-Year Record
Green sea lettuce (Ulva) outgrew even village-wide manual harvesting. After the nanobubble system was installed in September 2021, by 2024 the sea was restored to transparency — with fish and birds returning. Gold Prize (Governor's Award), 23rd Pan-Provincial Marine Environment Awards.
Beyond the Failure of Chemical Treatment, to Data Stability
The 2016 water crisis that coagulants (PAC) could not contain: after switching to AnyNble in 2017, total phosphorus fell 91% (0.248→0.022mg/L) and total nitrogen ~97%, recovering stable year-round quality. Zero chemicals used. (Testing: Hannam Environmental Eng. & Gyeonggi Institute of Health and Environment)
Algae-Covered Lake to Clean Lake in Just 3 Months
Installed May 2025; by the August measurement, chlorophyll-a had dropped 96% (938.8→33.2mg/㎥), total nitrogen 90%, total phosphorus 80% — through peak algae season and monsoon rains.
| Item | Before (May 14) | 3 Months (Aug 21) | Result |
|---|---|---|---|
| Chlorophyll-a | 938.8 (Very Poor) | 33.2 | 96% down |
| T-N | 7.1 | 0.7 | 90% down |
| T-P | 0.214 | 0.046 | 80% down |
| Total coliform | 2,400 | 170 | Improved |
Institutions & Sites in Operation Nationwide
Our systems run at 20 sites chosen by local governments and public agencies. (Units: 5HP each)
| Institution | Site & Waters | Note | Units |
|---|---|---|---|
| IFEZ Authority | Songdo Central Park | Seawater canal / artificial lake | 9 |
| IFEZ Authority | Haedoji Park | Artificial lake | 4 |
| IFEZ Authority | Cheongna Lake Park | Artificial lake | 12 |
| Incheon City | Incheon Grand Park Lake | Reservoir→artificial lake | 5 |
| Goyang City | Ilsan Lake Park | Artificial lake | 11 |
| Goyang City | Hallyu Waterfront Park | Stream + artificial lake | 10 |
| KRC | Eopseong Reservoir | 5 of 40 units underway | 5 |
| Cheonan City | Sinbang Lake Park | Artificial lake | 2 |
| Seoul Metro. Gov. | Nanji Pond | Stream + artificial lake | 2 |
| Goryeong County | Daegaya Village | Artificial lake | 2 |
| Gwangju Seo-gu | Pungam Lake Park | 5 of 40 units underway | 5 |
| Cheongju City | Ochang Culture Lake Park | Artificial lake | 4 |
| Seogwipo City | Ojo-ri coastal waters | Seawater | 10 |
| Gaetmaeul Fisheries Co-op | Pyoseon fish farm, Jeju | Aquaculture | 12 |
| KRC | Gogu Reservoir (TOC reduction) | Reservoir (20HP) | 3 |
| KRC | Nanjeong Reservoir (TOC reduction) | Reservoir (20HP) | 5 |
| LH Corp. | Geomdan Central Lake Park | Design-in | 4 |
| K-water | Songsan Green City Blueway | Design-in | 7 |
| Yeosu City | Geobukseon Park | Artificial lake | 4 |
| Yeosu City | Ungcheon Pond Park | Artificial lake | 4 |
Floating AnyNble units installed on an inflow stream
Remote monitoring HMI — supports unmanned continuous operation
Water Is Our Life and Our Future
HWANGSAN breathes life back into water. From site diagnosis to system design — talk to us.
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