Title

Primary Clarifier Abnormal Operation

-

SOP Identification Number
SOP Identification Number:
1100_AbnormalOp
Health & Safety Warnings
Health & Safety Warnings:
  • Watch for open tanks, vaults and channels when covers are removed.  Install cones at opening if covers are to remain off.
  • Watch for rotating equipment.
Cautions
Cautions:

Signs of abnormal operation include the following:

  • Excessive noise or vibration
  • Oil or process fluid leaks
  • Chain or flight not working
  • Lead pump not working
  • Excessive floating material
  • SCADA alarms
Personnel Qualifications
Personnel Qualifications:

Operator 1, knowledge of primary treatment process and SCADA controls.

Equipment, Supplies, Required Tools
Equipment, Supplies, Required Tools:
  • Valve keys or other tool to open and close valves.
Procedure
Procedure:
Step 1 takes place in the Operator’s Office
1.     Record Data to Operator’s Log Book: Record primary clarifier abnormal operation activities to the log book with other entries for the day. Include the following in the entry:
a.    Operator(s) that performed the Primary Abnormal Operation SOP.
b.    Conditions of abnormal operation.
c.    Troubleshooting activities performed.
d.    Correction action taken. 
e.    Results of troubleshooting and corrective actions taken on abnormal condition.
f.     Note the approximate time that the SOP was completed.
g.    Note any unusual conditions with flows, levels, odors or other process issues.
h.    Note any damage, wear, or required maintenance on equipment.
Data & Records Management, Calculations, Forms, Reports
Data & Records Management, Calculations, Forms, Reports:
  • Update log book.
  • Update maintenance records (if applicable).
  • Report any maintenance or attention that is required.
  • Collect and analyze samples, if necessary.
Corrective Action Plan
Corrective Action Plan:
Chain and/or flight and/or other systems that make unit inoperable.
  1. Within two hours, isolate the affected clarifier by closing the influent gates that are associated with that primary clarifier channel and basin.
  2. If possible, continue to operate the chain and flight, and continue sludge pumping for 2 hours and then drain. If not possible, drain unit immediately. 
  3. Make necessary repairs. 
  4. Wash down the primary clarifier tank after it is drained.
 Clarifier overload. No additional clarifiers are available.
  1. Operate at a higher surface loading than specified. 
  2. Monitor reactor influent for possible high BOS loading. Adjust MLVVS accordingly.
Broken chain or flight.
  1. Shut clarifier down immediately. Dewater and repair.
 Drive motor tripped out.
  1. Reset. If unit operates correctly for 30 minutes disregard. If motor trips out again, call electrician.
 
Floating or septic sludge.
  1. Check calculations for tank detention time. Excessive detention may create this condition.
  2. Check sludge pumping calculations.
  3. Check for work flights. Repair or replace, if necessary.
 Low suspended solids removal.
  1. Check calculations for detention time. Low detention could reduce removal efficiency. 
Equipment
Equipment:
EQUIPMENT
TAG NUMBER
 
 
Clarifier #1 & #2 Slide Gate
1101VLV1181B
Clarifier #2 & #3 Slide Gate
1101VLV1182B
Clarifier #3 & #4 Slide Gate
1101VLV1183B
Clarifier #4 & #5 Slide Gate
1101VLV1184B
Clarifier #5 & #2 Slide Gate
1101VLV1185B
 
 
Primary Clarifier #1 Channel Influent Valve South
1101VLV1181
Primary Clarifier #1 Channel Influent Valve North
1101VLV1181A
Primary Clarifier #2 Channel Influent Valve South
1101VLV1182
Primary Clarifier #2 Channel Influent Valve North
1101VLV1182A
Primary Clarifier #3 Channel Influent Valve South
1101VLV1183
Primary Clarifier #3 Channel Influent Valve North
1101VLV1183A
Primary Clarifier #4 Channel Influent Valve South
1101VLV1184
Primary Clarifier #4 Channel Influent Valve North
1101VLV1184A
Primary Clarifier #5 Channel Influent Valve South
1101VLV1185
Primary Clarifier #5 Channel Influent Valve North
1101VLV1185A
 
 
Primary Clarifier Sludge Collector Drive #1
1101MTR1721
Primary Clarifier Sludge Collector Drive #2 & #3
1101MTR1722
Primary Clarifier Sludge Collector Drive #4 & #5
1101MTR1723
 
 
Primary Clarifier Scum Collector Drive #1
1101MTR1724
Primary Clarifier Scum Collector Drive #2 & #3
1101MTR1725
Primary Clarifier Scum Collector Drive #4 & #5
1101GBX1726
 
 
Clarifier #1 Actuated Valve – Sludge Transfer
1102OPS1677
Clarifier #1 Actuated Valve – Sludge Transfer
1102OPS1677A
Clarifier #2 Actuated Valve – Sludge Transfer
1102OPS1677B
Clarifier #2 Actuated Valve – Sludge Transfer
1102OPS1677C
Clarifier #3 Actuated Valve – Sludge Transfer
1102OPS1677D
Clarifier #3 Actuated Valve – Sludge Transfer
1102OPS1677E
Clarifier #4 Actuated Valve – Sludge Transfer
1102OPS1677F
Clarifier #4 Actuated Valve – Sludge Transfer
1102OPS1677G
Clarifier #5 Actuated Valve – Sludge Transfer
1102OPS1677H
Clarifier #5 Actuated Valve – Sludge Transfer
1102OPS1677I
 
 
Clarifier #1 – South Drain Plug Valve
1102VLV1679
Clarifier #1 – North Drain Plug Valve
1102VLV1679A
Clarifier #2 – South Drain Plug Valve
1102VLV1679B
Clarifier #2 – North Drain Plug Valve
1102VLV1679C
Clarifier #3 – South Drain Plug Valve
1102VLV1679D
Clarifier #3 – North Drain Plug Valve
1102VLV1679E
Clarifier #4 – South Drain Plug Valve
1102VLV1679F
Clarifier #4 – North Drain Plug Valve
1102VLV1679G
Clarifier #5 – South Drain Plug Valve
1102VLV1679H
Clarifier #5 – North Drain Plug Valve
1102VLV1679I
 
 
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 – Suction Drain Valve
1102VLV1679J
Primary Sludge Transfer Pump #1 – Discharge Drain Valve
1102VLV1100D
 
 
Primary Sludge Transfer Pump #2
1102PMP1200
Primary Sludge Transfer Pump #2 – Suction Transfer Valve
1102VLV1200
Primary Sludge Transfer Pump #2 – Discharge Transfer Valve
1102VLV1200A
Primary Sludge Transfer Pump #2 – Suction Drain Valve
1102VLV1679K
Primary Sludge Transfer Pump #2 – Discharge Drain Valve
1102VLV1200D
ID
Maintenance Connect