M&M Work Schedules
Wastewater Treatment Plants
Daily Primary Clarifiers, Trickling Filters, Aeration Tanks, Lagoons, Polishing Filters, Chlorination
Primary Clarifier
·
Check tank surface for solids
carryover, grease and scum build up, floating sludge, gasification, oil, and
unusual or excessive colors and odors
·
Check walls, baffles, weirs,
launders, channels for slime and scum buildup
·
Check skimmer and scraper for
proper movement (smooth, no jerking), excessive and/or unusual noises
(especially banging), vibrations, odors (especially burning)
Þ
Properly collecting scum
Þ
Circular tanks
*
Watch feedwell (stilling ring)
rotating for proper movement
*
Torque indicators
*
Scum build-up on the skimmer
*
Remove rags from skimmer
*
Watch skimmer go over ramp
à
Release, not hung up
à
Not damaged or hung up in chute
à
Proper grease removal
à
Proper water drainage
Þ
Rectangular tanks
*
Check flights for proper alignment
and spacing
*
Check for broken flights
*
Check chain drives (see drives
below)
*
Check to see that sprocket and
chain are properly meshing
*
Remove rags from chain, flights,
sprockets
·
Check motor (see motor below)
·
Check drive chain (see drives
below)
·
Check oil levels
·
Check flow for unusual colors and
odors
·
Check water level upstream,
through, and downstream of the clarifier
·
Check scum trough and box
·
Pump sludge at least twice per day
Þ
Preferably, pump small amounts
frequently
Þ
Eliminate unnecessary water
Þ
Watch sight glass
Þ
Check supernatant return
·
Pump scum at least twice per day
Þ
Eliminate unnecessary water
Þ
Prevent crusting
Þ
Wash down tank walls, weirs,
channels, and excess scum
·
Record amount of scum and sludge
pumped
·
Check and record torque readings
·
Perform housekeeping -- hose down
walls, baffles, weirs, launders, channels, and area; wipe off excess oil and
grease; remove floating and/or lodged debris and rags and dispose of properly;
and clean area
Trickling Filter
·
Check bed surface for debris,
ponding, proper growth, psychoda flies, icing,
·
Check zoogleal mass for proper
color and thickness
·
Check distributor for proper
movement and flow
Þ
Broken parts -- guy wires and
splash plates
·
Check orifices for flow and
plugging
·
Check for unusual and/or excessive
odors
·
Check flow for unusual colors and
odors
·
Check recirculation (flow, color,
odors)
·
Check collection boxes
·
Check underdrain
·
Check for oil leakage near bearing
·
Perform housekeeping -- hose down
area, wipe off excess oil and grease, remove floating and/or lodged debris and
rags, and dispose of properly, and clean area
Aeration Tank
·
Check tank surface for proper
aeration and mixing
Þ
Mixing pattern
Þ Size of air bubbles
Þ Listen to air flow through lines
* Too noisy or too quiet
· Check jet mixers
Þ Watch bubbles
Þ Check for leaks
·
Check floc
·
Check distribution and collection
boxes
·
Check return sludge (flow, color,
odors)
·
Check sludge wasting
·
Check diffusers and header
·
Check floating mixers
·
Check scum and foam build-up on
tank surface and walkways
·
Check foam control spray
Þ
Spray pattern and force
Þ
Clean if necessary
·
Check oil levels
·
Check flow for unusual colors and
odors
·
Check water level upstream, thru,
and downstream of the aeration tank
·
Perform housekeeping -- hose down
area, wipe off excess oil and grease, remove floating and/or lodged debris and
rags, and dispose of properly, and clean area
Lagoon
·
Check dikes
Þ
Check the freeboard
Þ
Check for erosion
Þ
Check for animal damage, such as
cow and horse grazing or muskrats
Þ
Remove emergent vegetation, such
as cattails
Þ
Check road for erosion, pot holes
Þ
Check for leakage outside of the
ponds
·
Ponds
Þ
Check for scum, floating algal
mats, and sludge build-up, especially near inlets, transfer structures, and
corners
Þ
Check for unusual odors such as
hydrogen sulfide and pig pen
Þ
Check color of the water in the
ponds
Þ
Check for unusual or excessive
number of insects
Þ
Check for muskrats and beavers
Þ
Remove emergent vegetation, such
as cattails
·
Transfer Structures
Þ
Check to see if water is
transferring
Þ
Check water level in the structure
Þ
Check flow for unusual colors and
odors
Þ
Check for erosion around structure
Þ
Check transfer pipes
*
Plugged
*
Erosion near inlet or outlet pipes
*
Depth of water in outlet pipe
Þ
Check control device (gate valve,
boards) for proper position and corrosion
Þ
Check lids
Þ
Remove floating and/or lodged
debris, including nests, and dispose of properly
Final Clarifier
·
Check tank surface for solids
carryover, grease and scum build up, floating sludge, gasification, oil, and
unusual or excessive colors and odors
·
Check walls, baffles, weirs,
launders, channels for slime and scum buildup
·
Check skimmer and scraper for
proper movement (smooth, no jerking), excessive and/or unusual noises
(especially banging), vibrations, odors (especially burning)
Þ
Properly collecting scum
Þ
Circular tanks
*
Watch feedwell (stilling ring)
rotating for proper movement
*
Torque indicators
*
Scum build-up on the skimmer
*
Remove rags from skimmer
*
Watch skimmer go over ramp
à
Release, not hung up
à
Not damaged or hung up in chute
à
Proper grease removal
à
Proper water drainage
Þ
Rectangular tanks
*
Check flights for proper alignment
and spacing
*
Check for broken flights
*
Check chain drive (see drives
below)
*
Remove rags from chain, flights,
sprockets
·
Check motor (see motor below)
·
Check drive chain (see drives
below)
·
Check oil levels
·
Check flow for unusual colors and
odors
·
Check water level upstream, thru,
and downstream of the clarifier
·
Check scum trough and box
·
Pump sludge at least twice per day
Þ
Preferably, pump small amounts
frequently
Þ
Eliminate unnecessary water
Þ
Watch sight glass
·
Pump scum at least twice per day
Þ
Eliminate unnecessary water
Þ
Prevent crusting
·
Record amount of scum and sludge
pumped
·
Check and record torque readings
·
Perform housekeeping -- hose down
area, wipe off excess oil and grease, remove floating and/or lodged debris and
rags, and dispose of properly, and clean area
Þ
Wash down tank walls, weirs,
channels, and excess scum
Polishing Filter
·
Check filter surface for solids
build up, debris, cracks, mudballs, and unusual or excessive colors and odors
·
Check walls, baffles, weirs,
launders, channels for slime and scum buildup
·
Check the water level
·
Check and record the head loss
·
Check flow for unusual colors and
odors
·
Check water level upstream, thru,
and downstream of the filter
·
Backwash
·
Record length of filter run
·
Perform housekeeping -- hose down
walls, baffles, weirs, launders, channels, and area; wipe off excess oil and
grease; remove floating and/or lodged debris and dispose of properly; and clean
area
Chlorinator Room
·
Check for leaks
·
Check dosage rate (rotameter)
·
Check injector suction vacuum
·
Check chlorine pressure gauge
·
Check water pressure gauge
·
Feel temperature of lines
·
Check room temperature and lights
·
Check exhaust fans and vents
·
Check alarm
·
Check neutralization system
·
Record dosage rate
·
Perform housekeeping -- remove
debris and dispose of properly, and clean area
Chlorine Cylinder and Manifold
·
Check cylinder
·
Check for leaks
·
Feel temperature of cylinder and
lines
·
Check room temperature and lights
·
Check exhaust fans and vents
·
Record weight of cylinder in use
and amount of chlorine used each day
·
Compare dosage rate with weight
used
·
Perform housekeeping -- remove
debris and dispose of properly, and clean area
Chlorine Contact Chamber
·
Check for leaks
·
Check foam build-up on tank
surface and walkways
·
Check flow for unusual colors and
odors
·
Check water level upstream, thru,
and downstream of the contact chamber
·
Perform housekeeping -- hose down
area, wipe off excess oil and grease, remove floating and/or lodged debris and
rags, and dispose of properly, and clean area
Return to M&M Work Schedules
For more information, call 515-232-1663