Cooling tower water is usually dosed continuously with anti-corrosion chemicals and biocides while the system is operating.
Cooling tower water is usually dumped at about three monthly intervals but sometimes as frequently as monthly. There's also a small continuous bleed-off to prevent the concentration of scaling materials. The discharge flow rate when draining the cooling tower basin should be reduced as much as is practical.
- Wastewater containing contaminants
For contaminants which exceed our Wastewater Acceptance Standards, appropriate pre-treatment is to be installed prior to discharge to sewer. Pre-treatment may include pH correction, metal precipitation (e.g. Cr, Zn) and suspended solids removal.
- Wastewater from descaling operations
Treatment to remove gross solids via a silt arrestor sized relative to the discharge volume is required. Further pre-treatment may be required prior to discharge to sewer.