PWT recommended a SpectraGuard™ 100 dosage of 2.7 ppm, a reduction of 33% from the 4 ppm of their current antiscalant product. As a result, the Boca del Río plant was able to achieve an immediate reduction in antiscalant costs of $4,000 per RO system per year.
Having an even bigger financial impact were the changes made to reduce reliance on municipal water sources. To achieve this, PWT worked with Coca-Cola FEMSA to identify improvements that included better particulate filtration for more effective removal of suspended solids, automatic flushing of the membranes, and a strategy to minimize growth of bacteria on the membranes.
These improvements, along with the use of SpectraGuard™ 100, has eliminated their reliance on municipal water, allowing the plant to exclusively use well water for their production and achieve recovery rates of 65%. Coca-Cola FEMSA was able to realize an annual reduction in water costs by as much as $76,000 by reducing their reliance on the municipal water ($0.697/m3) in favour of the less expensive well water ($0.324/m3).
PWT was able to support Coca-Cola FEMSA in achieving their goals and realizing savings of $85,000 per year:
- Reduced antiscalant dosage from 4 ppm to 2.7 ppm with SpectraGuard 100
- Reducing their membrane cleaning frequency by 50%
- Changing their water source from 64% municipal water to 100% well water while maintaining a system recovery of 65%