Wastewater is a common part of the production process in many industrial plants. In certain cases, wastewater may contain heavy metals, non-biodegradable organic substances or even valuable raw materials that should be recycled back into the process. How can such water be treated in a sustainable way or without sludge production or excessive chemical consumption?
In many cases, vacuum evaporation technology offers a suitable solution. The heat source for vacuum evaporation is a heat pump, mechanical vapour compression heating or an external heat source (e.g. a hot water circuit from a cogeneration unit).
Description of vacuum evaporation technology
The efficient vacuum evaporation solution takes advantage of the natural phenomenon of evaporation. However, the evaporation of water occurs under reduced pressure and therefore at a temperature as low as 30°C, resulting in low operating costs. This produces distillate (up to 95% of the total volume of waste water). Its quality can reach up to demineralised water, which can be recycled into the production process. All substances that have a higher boiling point than water are concentrated into a concentrate stream corresponding to approximately 5% to 10% of the total volume of waste water with a concentration of more than 80% dry solids.
Costumer benefits
A suitable solution for industrial customers facing high wastewater disposal costs and strict legislative discharge limits. This situation is typical for the automotive industry, mechanical & surface treatments (aviation, appliances, furniture), graphic arts, photovoltaic & microelectronics, chemicals production, mining & primary metals or even digestate processing.
Benefits:
- Wastewater disposal costs reduction
- Wastewater volume reduction
- High quality effluent for recycling and reuse
- Absence of additional chemicals
- Zero Liquid Discharge
- Compatible with Industry 4.0
- Ready to use (Plug&Play)
- Mobile vacuum distillation units available for rent
- Laboratory scale testing
Resources
| EVALED_Evaporator.pdf - 0.pdf |