SEWAGE TREATMENT PLANT : STARTING, MAINTENANCE, BACK FLUSH AND CLEANING.

SEWAGE TREATMENT PLANT

STARTING PROCEDURE

• APPLY POWER TO CONTROL PANEL AND CONFIRM SOURCE LAMP IS ON.
• CONFIRM THE DIRECTION OF ROTATION OF DISCHARGE PUMP, TURN PUMP SWITCH TO MANUAL.
• SHUT STOP VALVE AND OPEN DRAIN VALVE FOR BIO FILTER TANK.
• INTRODUCE CLEANING WATER WHEN INDICATOR LAMP SHOWS HIGH LEVEL SHUT CLEANING WATER.
• OPEN TREATMENT WATER OUTLET VALVE, PUMP DISCHARGE VALVE AND OVERBOARD DISCHARGE VALVE
• TURN THE DISCHARGE PUMP TO AUTO ,PUMP SHOULD START AUTOMATICALLY AND WHEN WATER LEVEL DROPS PUMP SHOULD SHUT DOWN.
• CHECK QUANTITY OF OIL IN BLOWER , CONFIRM ITS DIRECTION OF ROTATION.
• OPEN AIR LIFT VALVE AND SHUT AIR SCOUR VALVE.
• START THE AERATION BLOWER.
• CHECK THE DISINFECTANT QUANTITY.OPEN SEWAGE SUPPLY VALVE TO THE PLANT

MAINTENANCE

• WEEKLY: CHECK QUANTITY OF DISINFECTANT (HYPOCHLORITE)
• BIWEEKLY: CHECK QUANTITY OF OIL AND CLEAN AIR FILTER OF BLOWER,CHECK CONDITION OF V- BELT.
• MONTHLY: CLEAN BIO FILTER TANK SCREEN.BACK FLUSH AND REMOVE SLUDGE.
• BIYEARLY: CHECK INSIDE COATING FIX CORRODED PART.

BACK FLUSH

• SHUT DISCHARGE PUMP.
• STOP BLOWER.
• OPEN AIR SCOUR VALVE AND SHUT AIR LIFT VALVE,
• TURN LOWER SWITCH ON AND LET IT RUN CONTINUOUSLY FOR ABOUT 30 MINUTES.
• OPEN AIR LIFT VALVE AND SHUT AIR SCOUR VALVE AND RESTART THE PLANT.

SEWAGE PLANT CLEANING.

• CLOSE THE INLET VALVE AND DRAIN THE TANK,
• FILL THE TANK AND FLUSH 3-4 TIMES
• OPEN THE MANHOLE.
• VENTILATE FOR 24 TO 48 HOURS.
• CHECK THE OXYGEN CONTENT AND PRESENCE OF POISONOUS AND EXPLOSIVE GASES.
• MAKE RISK ASSESMENT.
• PREPARE ENCLOSED SPACE PERMIT.
• 2 PERSON - 1 WILL ENTER WITH SCBA AND FRESH WATER HOSE.
• FLUSH THE INSIDE WALL AND DRAIN.
• CHECK THE INSIDE COATING AND CORRODED PARTS ETC.