Geneseo
Enviromation’s SCADA System Runs Geneseo’s WTP 22 Hours A Day!
VILLAGE OF GENESEO, NEW YORK – WATER TREATMENT PLANT IMPROVEMENTS The Village of Geneseo Water Treatment Plant is located in a residential area near the shores of Conesus Lake. VSG Enviromation Technologies, Inc. provided the controls for the water plant, filter operation and a SCADA (Supervisory, Control and Data Acquisition) system so that the plant can be monitored from the Village’s Wastewater Treatment Facility located nine miles away.
Process control includes monitoring of status and alarms, automatic flush and backwash cycles, and chemical feed controls. Existing service pumps were converted to (influent) low service pumps by the addition of variable frequency drives. One new and two rebuilt high service pumps are used to pump to the reservoir. Three (3) Trident treatment units are sequenced by the control logic. Once a unit is backwashed that unit is placed in standby mode and the oldest to be backwashed is called to run. The call to backwash is initiated based on high differential filter head or a 24-hour timer. Backwash may also be started manually and then is automatically stepped through each cycle.
System control is based on the reservoir level. Three (3) high service pumps start-stop, lead-lag on reservoir level. These pumps draw from a high service well at the treatment plant. Level in the high service well controls the treatment unit operation and low service pumps control speed and lead-lag operation. The control system automatically alternates the pumps to equalize service time. Normal operator’s time at the water plant is two hours a day; to check on the plant, start backwash and replenish the chemical day tanks. The remainder of the day the water plant is being monitored at the wastewater plant. There is also an auto dialer for after hours notification that will call key personnel in the event of major alarms.
VSG Enviromation’s sales division, engineered the provision of three (3) U.S. Filter’s Trident packaged treatment units. The new treatment process was installed within a building structure that had been architecturally enhanced to blend into the residential community.
VSG Enviromation designed and built the main control panel that includes an Allen-Bradley SLC5/03 programmable controller. The PLC has an expansion chassis to provide a total of 25 slots for I/O. Local operator interface is provided by a Kesler Ellis ZOID combination LED keypad unit in the main control panel. A computer at the water plant and one remote at the wastewater plant provide additional monitoring and control. The computers are running on Wonderware HMI SCADA software. Connection between the two is via a dedicated phone line. Water level in the 3 million-gallon finished water reservoir is sent by telemetry to the water plant via a second dedicated phone line.
Chemicals feed rates are determined by flow pacing. Weight sensors are used to monitor the chemical day tanks. Daily consumption is computed by the control system through tracking of weight changes.
VSG Enviromation engineers programmed the plant control system to produce data sheets of information required for agency reporting, provides log reports of alarms and events, displays operational status on graphic screens and provide charts on demand.