Ovivo by Ecolab Semiconductor & Electronics Water Treatment

Continuous Chemical Recovery

Anodizing Process Water Treatment Equipment

Anodizing processes use high volumes of acid. Without a reliable acid recovery system, significant wastewater is generated, which requires treatment. Continuous Chemical Recovery by Ecolab® Ultra-Pure Water+ is the perfect solution for acid recovery, reducing treatment costs and optimizing equipment life.

Continuous Chemical Recovery by Ecolab Ultra-Pure Water+ reduces the volume of wastewater with no additional chemicals and can be installed directly in the process line as it is fully protected from liquid projections.

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Equipment Details

In some industries, such as the aluminum industry, a high volume of acid is used for the anodizing. Acids, water and energy consumption, as well as limitation of wastewater to be treated, are key elements that have to be conscientiously managed through a reliable system that optimizes control and reduces production costs.

With Continuous Chemical Recovery by Ecolab Ultra-Pure Water+ continuous regeneration and purification process, anodizing baths no longer have to be discharged and replenished, eliminating the need for neutralization with sodium hydroxide solution or lime. Furthermore, the investment in new batches of sulphuric acid will become obsolete.

Other key features and benefits of Continuous Chemical Recovery include:

  • Wastewater reduction up to 50 percent compared to conventional equipment
  • Designed for a 100 percent capacity expansion
  • Reduced energy and chemical costs
  • Possibility to expand the Continuous Chemical Recovery 50 model to a Continuous Chemical Recovery 100 equipment capacity without additional capital investment

  Continuous Chemical Recovery50 Continuous Chemical Recovery100 Continuous Chemical Recovery250 Continuous Chemical Recovery500
Wastewater flow rate (l/h) 83 l/h 165 l/h 309 l/h 619 l/h
Anodizing bath flow rate (l/h) 150 l/h 300 l/h 560 l/h 1125 l/h
Aluminum Removal* (approx.) (g/h) 420 g/h
525 g/h
630 g/h
788 g/h		 840 g/h
1050 g/h
1260 g/h
1575 g/h		 1575 g/h
1969 g/h
2363 g/h
2953 g/h		 3150 g/h
3938 g/h
4725 g/h
5906 g/h
Utility Requirements (V/Hz) 120 - 230 V
50 - 60 Hz		 120 - 230 V
50 - 60 Hz		 120 - 230 V
50 - 60 Hz		 120 - 230 V
50 - 60 Hz
Dimensions (mm) Length: 1300 mm
Width: 800 mm
Height: 1930 mm		 Length: 1350 mm
Width: 800 mm
Height: 1930 mm		 Length: 2160 mm
Width: 1600 mm
Height: 2200 mm		 Length: 2160 mm
Width: 1600 mm
Height: 2250 mm
Weight (approx.) (kg) 350 kg 350 kg 850 kg 850 kg
Max operating temperatures 35°C
 35°C
 35°C
 35°C
Ovivo by Ecolab Semiconductor & Electronics Water Treatment

How It Works

Ecolab Ultra-Pure Water+ uses a special anion exchange resin to separate and control the concentration of metal salts in the solution. While treating the anodising bath, free acids are held back by the resin, while metal salts are allowed to pass through the ion exchanger. During regeneration of the media with water, the acidic electrolytes are released and returned to the anodising bath while the metal salts are wasted. This process is repeated continuously until the plant is turned off.

The anodising bath solution is pre-filtered and collected in the buffer tank for volume control. The filtered acid solution is then pumped upwards through the Continuous Chemical Recovery ion exchange column, filled with a special acid retaining resin. In this process, the acid will be retained by the resin and the metal salt solution will pass through and be discharged to the sewer.

Fresh water previously stored in the fresh water tank for volume control will be pumped, counter flow, through the Continuous Chemical Recovery ion exchange column to remove the acid from the resin. In this process, the acid which was retained by the resin, will be freed and returned to the anodising bath. This process will be repeated each time a low-level signal is received from the buffer tank.


Experienced Ultrapure Water Treatment Partners

  • Decades of ultrapure water purification applications development
  • Continuous innovation and extensive range of ultrapure water purification products
  • Comprehensive experience assisting our partners in all phases of ultrapure water production
  • Known for reliable, durable and high-quality system
  • In-depth understanding of water treatment and technologies in the electronics and semiconductor industry

Ecolab Ultra-Pure Water+

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