M&M Work Schedules
Wastewater Treatment Plants
Weekly
Headworks
·
Clean and inspect the channel
Þ
Remove all screenings, debris, and
grit
Þ
Hose channel, walls, equipment,
and walkways
Hand Cleaned Bar Screen
·
Clean and inspect the screen and
channel
Þ
Remove all screenings from front
and back of screen
Þ
Remove grit from the channel
Þ
Hose channel, walls, equipment,
and walkways
Þ
Check the condition of the screen
Mechanically Cleaned Bar Screen
·
Clean and inspect the screen, rake
mechanism, and channel
Þ
Remove all screenings and debris
from front and back of screen, the rake mechanism, and the channel
Þ
Remove grit from the channel
Þ
Hose channel, walls, equipment,
and walkways
Þ
Check the condition of the screen,
screenings removal mechanism (chain, sprockets, rakes, rake wiper, screen,
shroud, and elevator or conveyor), motor, drive, and controls
Screenings Grinder
·
Clean and inspect grinder
and channel
Þ
Remove all screenings from grinder
Þ
Remove grit
Þ
Hose unit and walkway
Þ
Check condition of the teeth,
anvil, motor, drive, and controls
Revolving Drum Comminuter
·
Clean and inspect comminuter and
channel
Þ
Remove all screenings from the
drum and channel
Þ
Remove grit from the channel
Þ
Hose channel, walls, equipment,
and walkways
Þ
Check condition of the drum, base
seal, cutter bars and teeth, motor, drive, and controls
Moving Wiper Comminuter
·
Clean and inspect comminuter and
channel
Þ
Remove all screenings from the
screen (front and back) and channel
Þ
Remove grit from the channel
Þ
Hose channel, walls, equipment,
and walkways
Þ
Check condition of the screen,
moving wiper arm, and the cutters (moving and stationary), motor, drive, and
controls
Barminuter
·
Clean and inspect barminuter and
channel
Þ
Remove all screenings from the
screen (front and back) and channel
Þ
Remove grit from the channel
Þ
Hose channel, walls, equipment,
and walkways
Þ
Check condition of the screen,
guide bars, cables, chains, seals, clutches or gears, brakes, cutters, motor,
drive, and controls
Þ
Before returning barminuter to
service, run cutter up and down to check alignment, length of run, and
vibrations or noises
Hand Cleaned Grit Chamber
·
Remove grit at least once a week
and dispose of properly
·
Record amount of grit removed
·
Clean and inspect the channel
·
Check the flow pattern
Mechanically Cleaned Grit Chamber
·
Clean and inspect chamber and
equipment
Þ
Check for grit build-up
Þ
Remove screenings, debris, and
grit from the channel and equipment
Þ
Hose channel, baffles, weirs,
walls, equipment, and walkways
Þ
Check the condition of the
channel, grit removal mechanism (buckets, feet, chain, sprockets, shroud, and
elevator or conveyor), motor, drive, and controls
·
Check the flow pattern
Aerated Grit Chamber
·
Clean and inspect chamber and
equipment
Þ
Check for grit build-up
Þ
Remove screenings, debris, and
grit from the tank and equipment
Þ
Hose tank, channels, baffles,
weirs, walls, equipment, and walkways
Þ
Check the condition of the
channel, aeration equipment, grit removal mechanism (buckets, feet, chain,
sprockets, shroud, and elevator or conveyor, or air line and cyclone), motor,
drive, and controls
Primary Clarifiers
·
Clean and inspect tank and
equipment
Þ
Circular
*
Condition of the rubber wipers on
the skimmer
Þ
Rectangular
*
Condition of the flights, feet,
chain and sprockets
à
Chain tension
*
Grease sprockets
Þ
Watch skimmer and scraper for
proper operation
Þ
Remove screenings and grit from
the channels and equipment
Þ
Hose channel, baffles, weirs,
walls, equipment, and walkways
·
Check the whole weir for even flow
·
Check the coupling
·
Check the flow pattern
·
Fill oilers as necessary
·
Oil drive chains
Trickling Filter
·
Check oil level in the bearings
and drain any accumulated water
·
Clean and inspect equipment
Þ
Check for corrosion
Þ
Inspect and clean arms and splash
plates
*
Open end gates and unplug
orifices, and properly dispose of debris
*
Brush splash plates and arms to
remove slime
*
Level
Þ
Check guy wires and turnbuckles
for proper tension
Þ
Check center column for vibrations
Þ
Hose down inside wall to remove
slime growth
Þ
Remove trash and weeds from filter
surface and dispose of properly
·
Time and record rotation speed and
flow
·
Check vents for proper flow
Activated Sludge Aeration Tank
·
Clean and inspect tank and
equipment
Þ
Check the condition of the air
lines and diffusers
Þ
Remove debris from the channel and
equipment
Þ
Hose channel, baffles, weirs,
walls, equipment, and walkways
Þ
Clean bypass channel
·
Grease turbines
·
Fill oilers as necessary
·
Check the flow pattern
·
Calculate and record F/M, MCRT,
and sludge age
Lagoons
·
Ponds
Þ
Measure and record the depth of
each pond
Þ
Perform housekeeping -- remove
debris and dispose of properly, and clean area
·
Transfer Structures
Þ
Measure and record the depth of
each structure
Þ
Perform housekeeping -- remove
debris and dispose of properly, and clean area
·
Lab Tests
Þ
Collect and analyze influent and
effluent samples for BOD, D.O., pH, settleable solids, suspended solids,
ammonia, nitrates, oil and grease, phosphorus, and temperature
Þ
Collect and analyze effluent
samples for chlorine residual, coliforms, and turbidity
Final Clarifiers
·
Clean and inspect tank and
equipment
Þ
Circular
*
Condition of the rubber wipers on
the skimmer
Þ
Rectangular
*
Condition of the flights, feet,
chain and sprockets
à
Chain tension
*
Grease sprockets
Þ
Watch skimmer and scraper for
proper operation
Þ
Remove debris from the channels
and equipment
Þ
Hose channel, baffles, weirs,
walls, equipment, and walkways
·
Check the whole weir for even flow
·
Check the coupling
·
Check the flow pattern
·
Fill oilers as necessary
·
Oil drive chains
Chlorination
·
Clean and inspect chlorine
cylinders, chlorinator, piping, contact chambers, exhaust fans, and scales
Þ
Remove debris from the channels
and equipment
Þ
Hose channel, baffles, weirs,
walls, equipment, and walkways
·
Check and clean water screen
·
Check the flow pattern in contact
chamber
Anaerobic Digesters
·
Clean and inspect lid, gas piping,
mixer, furnace, heat exchanger, relief valves, waste gas burner, pressure
regulators, and exhaust fan
Þ
Check draft tubes for plugging
·
Transfer sludge from bottom of the
primary digester to the secondary digester
·
Work floating cover seal
·
Withdraw excess digested sludge
·
Record amount of sludge withdrawn
·
Backflush sludge lines
·
Fill oilers as necessary
Aerobic Digesters
·
Clean and inspect equipment
Þ
Remove debris from the channels
and equipment
Þ
Hose channel, baffles, weirs,
walls, equipment, and walkways
·
Transfer sludge from bottom of the
primary digester to the secondary digester
·
Withdraw excess digested sludge
·
Record amount of sludge withdrawn
·
Backflush sludge lines
·
Fill oilers as necessary
Drying Beds
·
Clean as soon as sludge is dry
Þ
Clean and inspect all parts and
equipment before refilling
·
Properly dispose of dried sludge
·
Record amount of sludge removed
Sludge Lagoons
·
Measure and record the depth of
each lagoon
Control Panel
·
Clean and inspect panels,
switches, alarms, gauges, lights and timers
Motors
·
Clean and inspect
·
Fill oilers as necessary
Drives
·
Clean and inspect
·
Fill oilers as necessary
·
Shaft
Þ
Grease pillow block bearings
·
Gear Reduction Units
Þ
Check to see that shims are in
place
Pumps
·
Clean and inspect
*
Centrifugal pumps
*
Follower, slinger, casting, and
seal
Þ
Piston pumps
*
Piston, seal, shear pin,
eccentric, connecting rods, guides, pressure gauges, pillow block bearings,
expansion tanks, ball check valves, and oil dripper
*
Change oil over wrist pin
*
Grease guides
Þ
Progressive cavity
*
Seal and pressure gauges
·
Repack as necessary
Þ
Check for metal parts
Þ
Properly replace lantern ring
Þ
Check wear sleeve or shaft for
wear and roughness
·
Fill oilers as necessary
Blowers and Compressors
·
Clean and inspect
Þ
Seal, pressure gauges, cooling
water, and drip traps
·
Record temperatures
·
Fill oilers as necessary
Flow Meter and Recorder
·
Clean and inspect channel and
stilling well
Þ
Check float and cable for wear
Þ
Remove grit and scum
Þ
Check float and cable for wear
·
Clean and inspect recorder
Þ
Wind clock
Þ
Change chart
Þ
Check chain
Þ
Check and fill ink reservoir as
necessary
·
Check the flow pattern
Wet Wells
·
Clean and inspect wet well and
equipment
Þ
Remove debris from the channels
and equipment
Þ
Hose channel, baffles, weirs,
walls, equipment, and walkways
·
Check the flow pattern
Standby Generators
·
Exercise the generators
Þ
Check voltage
Þ
Check cycles
Þ
Check engine
*
Check for unusual and/or excessive
heat, noises, vibrations, and odors, especially burning
*
Oil levels
*
Oil pressure
*
Temperature of manifold, after
cooler, and heat exchanger
*
Hoses for leaks
*
Fuel pressure
*
Cooling fan and radiator
*
Water circulation pumps
Þ
Check battery
*
Charge rate
*
Water level
·
Fill oilers as necessary
General
·
Gates and Fences
Þ
Check for vandalism (holes,
sections torn down, burrowing under the fence)
Þ
Perform housekeeping -- remove
debris and dispose of properly, and clean area
·
Surrounding Area
Þ
Check for leaking and ponding
Þ
Perform housekeeping -- remove
debris and dispose of properly, and clean area
Return to M&M Work Schedules
For more information, call 515-232-1663