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
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