Main Instrumentation Panel
The plant SCADA (Supervisory Control And Data Acquisition) system is capable of monitoring equipment and processes throughout the entire plant and at the five lift stations located throughout the City of Sheboygan. Older style relay logic control panels have been updated to state of the art Programmable Logic Controllers (PLC) and HMI (Human Machine Interface) touch panel computers. The PLC's control, monitor and record the operating status of all critical equipment at the wastewater treatment plant. The HMI touch panels provide operators and other staff a user friendly and intuitive method for machine control. Data from the PLC's is collected by a server that totalizes and logs the data, and displays it graphically on a video monitor. The SCADA system allows plant operators to monitor status and make process adjustments from various terminals located throughout the plant, as well as from one central location at the wastewater treatment plant. Lift station status can also be monitored on the screens.
Facilities Design Data
Design Population: 86,500
Influent Design Loadings
Average Design Flow: 18.4 million gallons per day (MGD)
Maximum Design Flow: 56.8 MGD
Organic (BOD) Load: 27,940 lbs/day
Suspended Solids (SS) Load: 25,040 lbs/day
Phosphorus Load: 1,130 lbs/day
2005 Average Daily Load
Average Daily Flow: 9.3 million gallons per day (MGD)
Average Daily BOD Load: 17,607 lbs/day
Average Daily SS Load: 19,546 lbs/day
Average Daily Phosphorus Load: 483 lbs/day
Effluent Permit Limitations
Permit Limit: BOD: 4,600 lbs/day, 30 parts per million (ppm)
Permit Limit: SS: 4,600 lbs/day, 30 ppm
Permit Limit: Phosphorus: 154 lbs/day, 1 ppm
2005 Average Daily Discharge
Average Daily Discharge BOD: 930 lbs/day, 12 ppm
Average Daily Discharge SS: 388 lbs/day, ppm
Average Daily Discharge Phosphorus: 51 lb/day, 0.66 ppm
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