A paint manufacturer engaged Dynatec to provide a system to separate latex from wastewater and reuse it in the production of paint
The Problem
The company was using a chemically assisted, rotary drum vacuum pre-coat filter that was expensive to operate and created a lot of sludge which was expensive to dispose.
The Solution
The white paint wastewater was segregated from the colors, and
processed separately. The concentrate of white latex solids were used in the manufacture of new white paint.
The paint solids from the colored paints can be concentrated to as high as 20% (typical paint contains between 45% and 55% solids) using wide channel ultrafiltration. The paint solids are concentrated and reused to make a grey paint. The water can be discharged to sewer, since it contains no solids, or it can be reused as wash water.
Special circulation pumps are also used to handle the high solids loadings.
Return on investment
The return on investment was high. The latex from the white paint wastewater is reused in the production process for manufacture of new paint. The paint solids from the colored paint wastewater is recovered as a saleable low quality paint product. The cost for disposal of the solids removed by the old chemical treatment system has been reduced by 90%. The wastewater from both processes is discharged to sewer.
Significant Savings:
No sludge
Beneficial use for latex
Water quality for discharge is better
Much less operator time
No chemicals
Ultrafiltration excels at the clarification of solutions containing:
Suspended solids
Bacteria
High concentrations of macromolecules including:
Oil and water
Fruit juice
Milk
Latex
Whey
Electro-coat paints
Pharmaceuticals
Poly-vinyl alcohol
Potable water
Tertiary wastewater
Some proteins
Some dyes
Oils
Colloidal or emulsified components
Contact Dynatec Systems today to discuss your wastewater solution!
https://www.dynatecsystems.com/technologies/membrane-technologies/ultrafiltration-systems/