11 Primary Sludge Pump Start Up (Clarifier Drain)
- Transfer of sludge from the Primary Clarifiers to the Gravity Thickener.
- Drain sludge from the Primary Clarifiers to the Gravity Thickener
Watch for open tanks, vaults and channels. If working on or near equipment, watch for moving parts
Ensure that the correct Primary Sludge Transfer and Drain suction and discharge valves have been opened and/or closed before starting up the pumps. Drain valves must be open and trasnfer valves must be closed during the sludge transfer process.
Each Primary Sludge Pump is equipped with the following piping and valves:
- Suction Transfer (grey piping)
- Discharge Transfer (grey piping)
- Discharge Drain (white piping)
Operator I, knowledge of primary treatment process and SCADA controls.
Valve keys or other tools to open and close valves.
- Record activity to log book.
- Self-check of drain and transfer valve manipulation.
- Monitor process to make sure flows are reaching the Gravity Thickener.
a. Open the Primary Sludge Drain Discharge Valve {tag nos. 1102VLV1100D & 1102VLV1200D}. b. Open the Primary Sludge Transfer Suction Valve {tag nos. 1102VLV1100 & 1102VLV1200}. c. Close the Primary Sludge Transfer Discharge Valve {tag nos. 1102VLV1100A & 1102VLV1200A}
2. Prepare Primary Sludge Pumps: {tag nos. 1102PMP/MTR1100 & 1102PMP/MTR1200} Step 2 takes place “downstairs” at Gallery #2. a. Locate the Primary Sludge Pump ON/OFF switch {tag nos. 1102HS1100 & 1102HS1200} and turn to ON. 3. Confirm Remote Control at SCADA workstation: Step 3 takes place at any available SCADA workstation. a. Login and go to Primary Sludge Automated Control System screen. b. Check that lead sludge pump is in-service. c. Check that lag sludge pump is out-of-service. 4. Observe Pump Operation: Step 4 takes place “downstairs” at Gallery #2. a. Verify that lead pump is in operation. b. Check for leaks, excessive noise and vibration at the pump. c. Check for air lock in the pump. If the pump is air locked, flush and drain the piping. 5. Record Data to Operator’s Log Book: Record Primary Transfer Pump Start Up activities to the log book with other entries for the day. Include the following in the entry: a. Operator(s) that performed the Start Up SOP. b. Note conditions of pump, piping and valves. c. Note the approximate time that the SOP was completed. d. Note any damage, wear, or required maintenance on equipment. |
- Update log book.
- Update maintenance records (if applicable).
- Report any maintenance or attention that is required.
Sludge is drained from the Primary Clarifier(s) to the Gravity Thickener. Clarifier(s) are drained for maintenance or service.
EQUIPMENT | TAG NUMBER |
Primary Sludge Transfer Pump #1 Motor | 1102MTR1100 |
Primary Sludge Transfer Pump #1 | 1102PMP1100 |
Primary Sludge Transfer Pump #1 – Suction Transfer Valve | 1102VLV1100 |
Primary Sludge Transfer Pump #1 – Discharge Transfer Valve | 1102VLV1100A |
Primary Sludge Transfer Pump #1 – Discharge Drain Valve | 1102VLV1100D |
Primary Sludge Transfer Pump #1 – ON/OFF Switch | 1102HS1100 |
Primary Sludge Transfer Pump #2 | 1102PMP1200 |
Primary Sludge Transfer Pump #2 Motor | 1102MTR1200 |
Primary Sludge Transfer Pump #2 – Suction Transfer Valve | 1102VLV1200 |
Primary Sludge Transfer Pump #2 – Discharge Transfer Valve | 1102VLV1200A |
Primary Sludge Transfer Pump #2 – Discharge Drain Valve | 1102VLV1200D |
Primary Sludge Transfer Pump #2 – ON/OFF Switch | 1102HS1200 |