Prepare the wastewater.
First remove or control substances that could block or damage the equipment used to recover water.
Zero Liquid Discharge · Integrated solution
Zero liquid discharge systems.
Plan water recovery and waste handling.
Zero liquid discharge (ZLD) combines treatment steps so wastewater does not leave the system as liquid waste. The design brings together industrial wastewater recycling, water recovery and proper handling of the remaining salts and solids.
See how it worksOne example of recovering water
Prepare the wastewater
ETP / first cleaning steps
Recover water with membranes
RO where appropriate
Water → quality check → intended reuseConcentrate the remaining liquid
Evaporation
Cooled vapour becomes water → test → reuseManage the final residue
Dry and handle the leftover solids
Solids → approved handling or disposalAn objective, not one machine
Several machines work towards one goal.
Follow the example above: prepare the wastewater, recover water, then handle what remains. The equipment and order depend on what is in your wastewater.
Separate usable water.
Special filters can separate water from dissolved salts. Heating and cooling can collect more water later. Test each source of recovered water before using it.
Look after what is left.
The salts and solids remain after water is removed. Plan how to handle them, along with dirty water from washing the equipment.
The bigger picture
Zero liquid discharge does not mean zero waste.
Even when no liquid waste leaves the system, solid waste remains. The plant also needs energy, cleaning and regular care.
Follow all the water
Track how much water comes in, how much is reused and where the rest goes, including water lost as vapour.
Plan for leftover solids
Plan where solids will be stored and how they will be handled. They can only be reused or sold if their quality makes that suitable.
Keep the plant running
Check the power and heat needed, plan maintenance and allow for changes in the incoming wastewater.
Before choosing a system
Start with the full site picture.
What wastewater does the site produce?
Check the amount and contents of each source of wastewater, including salty leftover water and water used for cleaning.
Where can the recovered water be used?
Find jobs on site that need water. Check whether the recovered water is suitable or needs further treatment first.
What happens during cleaning and repairs?
Plan where water and solids will go during everyday operation, cleaning and maintenance.
Let’s talk about cost
What will you be paying for?
ZLD is a connected treatment system, so its cost comes from several pieces working together. The budget needs to cover the whole route, including the waste left after water recovery.
Buying and setting it up
The starting cost covers the selected treatment, water-recovery and residue-handling equipment. Buildings, tanks, pipes, power and heat connections may also be part of the work.
The bills after installation
Budget for electricity, heat where needed, operators, cleaning, repairs and water tests. Remaining salts and solids still need handling and a suitable destination.
Why prices can differ
The amount of water, the pollution in it and the amount you want to recover shape the system. A price for one machine cannot tell you the cost of a complete ZLD plant.
A little clarity
Questions you may have
Your water. Your requirements.
Plan your wastewater treatment around the water you have.
Tell us where your wastewater comes from, roughly how much you have each day and what you want to use it for. Share any water test results you have.
Discuss your treatment plan
Based in Perundurai, Erode, Tamil Nadu. Serving Tamil Nadu, South India and India.
