Conclusion: The project, as with many wastewater treatment systems, was constrained by time, space, and money. The use of a standard packaged system at the center of the treatment process allowed us to offer the customer a very capable system with a good delivery time, very competitive price, and minimal installation since the entire treatment system was fabricated in our shop prior to shipping.
The system performance has exceeded all specified and published requirements. In the first 2 years of operation there has not been a single discharge contravention and the total plant fluoride has averaged 2ppm. The system has been fully functional 24/7 for the first 2 years with no downtime, other than routine calibrations (weekly) and routine and scheduled maintenance. The influent fluoride levels are routinely in excess of 1,500 ppm.
Description: The system supplied for this application utilizes our unique process for reduction and removal of fluoride from semi-conductor wastewater streams as non-hazardous calcium fluoride (CaF2). The process we employ is totally automated, requires no operator intervention (other than periodic maintenance and calibrations), is safe and can yield total fluoride levels as low as 2 ppm, depending on configuration.
The system featured in this case review is a duplex system. Two totally independent systems operate in parallel with only minimal common components. One stream can be taken offline for service while the other continues to operate totally independent of the other branch.
This package was totally fabricated in our facility and shipped as several subsystems, including a catwalk for servicing equipment at higher elevations. Installation was minimized by the fact that the entire system was fabricated in our shop prior to shipping.
A Supervisory Control And Data Acquisition (SCADA) system is installed that monitors the entire system. All of the programmable parameters, tuning variables, and setpoints are available through the SCADA system. All process variables and system performance are monitored continuously via the SCADA system. Historical logging will maintain a continuous stream of data that may span several years.
A remote connection is available via an Internet connection that allows us to monitor the system from anywhere in the world. We are able to troubleshoot, modify tuning parameters, or conduct training via this online connection.
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