Reducing Coagulant Usage and Elimination of Caustic Soda in Wastewater Treatment, Saving Time and Money
The Problem:
A Northwest Box Manufacture was having safety issues and concerns about the use of caustic to adjust their pH after chemical treatment of their wastewater. The need existed due to the presence of copper in their wastewater. Copper optimally precipitates out of water at a pH of 8, and is thus the target pH. The current chemical treatment program required an amount that reduced each wastewater batch to a pH of 4. It was then necessary to use caustic to raise the pH back to 8 to precipitate the copper out of the waster.
Our Solution:
Cesco completed bench scale testing and created a coagulant product that did not require addition to pH 4 for coagulation, thus eliminating the need for caustic soda in the wastewater process.
| |
Cesco Solutions Treatment Strategy |
Competitor Treatment Strategy |
| Coagulant |
Cesco Protect-7000 |
Product X |
| Coagulant Usage |
125 gallons/week |
250 gallons/week |
| Coagulation pH |
8.0 |
4.5 |
| Caustic Soda Usage |
0 |
25 gallons/week |
| Final pH |
8.0 |
8.0 |
The Result:
Cesco completely eliminated the need for caustic in the wastewater. Full-scale trials also revealed a 50% reduction in coagulant usage. This saved the company both money and time, by reducing the quantity of supplies used, and the time spent restocking them.
Cesco’s Added Value:
- Elimination of both the caustic soda and corrosive coagulant, eliminating safety and environmental concerns
- 50% reduction in coagulation and 100% reduction in caustic soda usage
- Reduction in sludge mass and associated disposal costs
- Operational time savings
< Water Treatment Case Studies
|
