Convention teaches that ZLD requires energy-intensive boiling to produce solids. Our engineers recently broke that convention and helped a mining client achieve solid salt production in a novel membrane-chiller hybrid plant using UHP-RO.
What is Zero Liquid Discharge & Why is it Important?
January 15th 2018
There are a number of benefits to targeting zero liquid discharge for an industrial process or facility:
- Lowered waste volumes decrease the cost associated with waste management.
- Recycle water on site, lowering water acquisition costs and risk. Recycling on-site can also result in less treatment needs, versus treating to meet stringent environmental discharge standards.
- Reduce trucks associated with off-site waste water disposal, and their associated greenhouse gas impact and community road incident risk.
- Improved environmental performance, and regulatory risk profile for future permitting.
- Some processes may recover valuable resources, for example ammonium sulfate fertilizer or sodium chloride salt for ice melting.
Download our ZLD infographic for detailed information on costs.
- Zero Liquid Discharge (ZLD) and Minimal Liquid Discharge (MLD) Become Lower Cost Through Reverse Osmosis Innovation (News)
- Choosing the Right Zero Liquid Discharge Technology: Evaporators & Crystallizers (Article)
- How to Manage Brine Disposal & Treatment (Article)
- Zero Liquid Discharge and Minimal Liquid Discharge (Solution)
Why is Zero Liquid Discharge Important?
Heavy industry, manufacturing, and natural resource-based industries often use large volumes of water and generate wastewaters requiring treatment. Saltworks designs, builds, and operates industrial wastewater treatment plants with modern membrane, chemical, and thermal technologies that economically and reliably treat tough industrial wastewaters.
The many options for managing brine, a term for saline wastewater from industrial processes, fall under two categories: brine treatment and brine disposal. Brine treatment involves desalinating the brine for reuse and producing a concentrated brine (lower liquid waste volume), or residual solids (zero liquid discharge).