PRAB > News & Knowledge > Application Reviews > Digital Memory Storage Production Site Solves Acid Pickling Bath’s Wastewater Issues with Vacuum Evaporation

Digital Memory Storage Production Site Solves Acid Pickling Bath’s Wastewater Issues with Vacuum Evaporation

Challenge:

Nickel in wastewater


Solution:

PRAB EVALED® Vacuum Evaporator (model PC F 24FF)


Results:

70-90% of distillate is recovered and reused

The Challenge

A well-known manufacturer in the memory storage industry was searching for a solution to their increasing disposal costs and significant storage problems that were occurring as a result of the amount of wastewater coming from their acid pickling rinse baths containing Nickel.

The Solution

Because no two wastewater streams are exactly alike, in order to find the best solution to meet the plant’s goals and application, a careful review of their process was completed, along with a thorough testing and analysis of the wastewater. It was then determined that a PRAB EVALED® Vacuum Evaporator (model PC F 24FF) would be the best solution and it was added to the plant’s wastewater treatment process.
 

New Rinse Water Treatment Process Implemented

Diagram - New Rinse Water Treatment Process Implemented to remove nickel using vacuum evaporation
New Treatment Process Results:

Parameters u.m. Waste In Distilled Out Concentrate Out
COD ppm 50,000-60,000 1,000-4,000
Conductivity µS/cm 160,000-220,000 400
TS at 105˚C % 16-18
35-40
pH 4.7-5.4 4.6 5.5
Ammonium 17,000-32,000 <300
Nickel ppm 5,500-6,500 <2 12,000-15,000

 

Results Achieved

After adding the new vacuum evaporator to the process, the plant saw a significant reduction in sludge and disposal costs. Now, 70-90% of distillate is recovered and reused in the production process—which has resulted in a system payback within 8-months of installation.

Learn more about Vacuum Evaporators >

PRAB Evaled Vacuum Evaporator used to treat pickling bath