Problems with river pollution accidents
2018. Carcinogens detected in Daegu tap water
Frequent water pollution around Nakdong-gang river
- Carcinogens detected in Daegu tap water
- Carcinogens detected in Daegu tap water
Conflict between the surrounding industrial complexes and Daegu city intensifies
Ministry of environment proposal to local governments for ZLD system
Initiation of research services for ZLD system at several treatment plant
Research for Zero Liquid Discharge system
- Research for zero liquid discharge system(2018 ~ 2019)
- Gumi sewage treatment plant : Dohwa eng (about $760,000)
- Seongseo wastewater treatment plant : Korea Water Resources Corporation (about $1.1 million)
Reuse of sewage treatment water in domestic
Problems of traditional RO system
Difference with traditional RO
| Traditional RO System |
| General recovery rate 75% |
| Short membrane lifespan by increasing fouling and scaling |
| Energy consumption increase by membrane contamination |
| High permeate costs by low recovery rate |
| Unable to ZLD, MLD system due to high concentrate generation |
| High recovery RO System |
| Minimum recovery rate 85% |
| Long membrane lifespan with lower fouling and scaling(2times) |
| Energy consumption decrease with lower contamination(30%) |
| Breakthrough permeate costs saving with High recovery rate |
| Ideal for ZLD, MLD |