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Zero Liquid Discharge (ZLD)

Apr 28, 2014



Use your water wisely.  Reduce your water costs by recycling 95% or more of your process water.
• Eliminate any possibility of discharging non-compliant water
• Recover reusable purified process water
• Leave only small quantities of dry solid waste for disposal


Kontek ZLD Process Steps
 
Step 1: RECOVER: The first step is to recover as much purified water as possible for reuse:
 
ReKon Ion Exchange 
RoKon Reverse Osmosis
 
Step 2: PRECIPITATE: The second is to dealing with the residual concentrated liquid contaminants.  This requires precipitating all of the dissolved contaminants from the solution as solid particles.
 
Step 3: DEWATER: In the dewatering step, we concentrate the precipitate contaminants by reducing their moisture content to end up with a small residual volume of dry solid waste.  Dewatering takes two alternate paths, Liquid and Solids: 

 
The clear liquid layer on top goes through the evaporation and liquid crystallization steps:
 
ConRec Evaporator 
ConRec Liquid Crystallizer 
 
 
The settled solid precipitants go through the filter press and sludge dryer to become solid waste.
 
ConRec Filter Press
Conrec Sludge Dryer

 
With Kontek ZLD systems, you will:
• Consistently meet strict compliance discharge levels with reliable equipment
• Target, recover and reuse specific contaminants with ion exchange
• Significantly reduce sludge and slurry waste disposal costs with solids dewatering equipment
• Efficiently treat and recycle process wastewater
• Minimize labour costs with self-protecting and automated system safety features
• Maintain a safe work environment while promoting environmental stewardship 


Zero Liquid Discharge Technologies

Ion Exchange Recovery Technologies
 
Efficiently deionize, soften, recover and re-use raw water and wastewater with automated ReKon ion exchange systems.

 
Reverse Osmosis Recovery
 
Consistently recover 85% of your raw or process wastewater with RoKon reverse osmosis systems.

 
Liquid Crystallizers
 
Transform drums of heavy slurry waste into grams of lightweight free-flowing crystals
 Sludge Dryers
 
Cut liquid waste disposal costs by two-thirds with the original under-the-press sludge dryer
SmartLogic: Automated Controls
 
SmartLogic’s intuitive design protects your water quality, safeguards your parts and conserves chemicals – all while minimizing labour requirements.
Filter Presses
 
Reduce disposal and haulage costs by turning liquid waste solution into solid sludge cakes.

Source: http://kontekecology.com/applications/zld-2/