Zero Liquid Discharge systems - waste water recycling

The advantages of closed waste water systems:

• reduction of water and sewage costs
• reduction of water consumption
• the most environmentally friendly water management solution in the production sector

Closed circuits can be designed as:

• Partially closed
  recycles part of the waste water and thus reduces the production of discharged waste water 
• Completely closed – Zero Liquid Discharge
  all waste water is recycled back into the production process and no waste water is discharged

For the implementation of closed waste water systems, the following is used:

• adsorption on ion exchange resins
• separation of substances by membrane processes
• distillation using vacuum evaporators