M&M Work Schedules
Wastewater Treatment Plants
Daily Digesters, Drying Beds, and Lagoons
Single Stage Anaerobic Digester
·
Check sludge level
·
Check floating lid and gas seal
Þ
Check condition of seal
Þ
Check height of lid
Þ
Check to see that lid is not
cocked and that it is freely moving up and down
Þ
Check for sludge messes on lid and
walls, and clean
·
Check fixed cover
Þ
Check seal
Þ
Check for gas leaks
·
Check gas pressure
·
Check regulator
·
Check pressure/vacuum relief
valves
·
Check piping for leaks and failure
·
Check digester temperature
·
Check room temperature, lights,
and ventilation
·
Check motor (see motor below)
·
Check drive chain (see drives
below)
·
Check oil levels
·
Check furnace
Þ
Check temperature
Þ
Check flame to see that it is
proper
Þ
Check pilot light
·
Check heat exchanger
Þ
Check inlet and outlet water
temperatures
Þ
Check inlet and outlet sludge
temperatures
·
Check mixer
Þ
Gas mixer
*
Check compressor and motor (see
compressor and motor below)
*
Check drip traps and drain when
necessary
*
Check gas pressure
*
Check for leaks
*
Feel temperature of lines
Þ
Propeller or draft tubes
*
Check motor (see motor below)
*
Check to see that mixer is
operating
*
Reverse direction for propeller
mixer at least once daily
Þ
Propeller or draft tubes
*
Check motor (see motor below)
*
Check to see that mixer is
operating
*
Reverse direction for propeller
mixer at least once daily
·
Check waste gas burner
·
Record gas production
·
Withdraw supernatant
·
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
Two Stage Anaerobic Digesters
·
Primary Digester
Þ
Check sludge level
Þ
Check floating lid and gas seal
*
Check condition of seal
*
Check height of lid
*
Check to see that lid is not
cocked and that it is freely moving up and down
*
Check for sludge messes on lid and
walls, and clean
Þ
Check fixed cover
*
Check seal
*
Check for gas leaks
Þ
Check gas pressure
Þ
Check regulator
Þ
Check pressure/vacuum relief valve
Þ
Check piping for leaks and failure
Þ
Check drip traps and drain when
necessary
Þ
Check digester temperature
Þ
Check room temperature, lights,
and ventilation
Þ
Check motor (see motor below)
Þ
Check oil levels
Þ
Check furnace
*
Check temperature
*
Check flame to see that it is
proper
*
Check pilot light
Þ
Check heat exchanger
*
Check inlet and outlet water
temperatures
*
Check inlet and outlet sludge
temperatures
Þ
Check mixer
*
Gas mixer
à
Check compressor and motor (see
compressor and motor below)
à
Check drip traps and drain when
necessary
à
Check gas pressure
à
Check for leaks
à
Feel temperature of lines
*
Propeller or draft tubes
à
Check motor (see motor below)
à
Check to see that mixer is
operating
à
Reverse direction for propeller
mixer at least once daily
Þ
Transfer sludge to secondary
digester
Þ
Perform housekeeping -- wipe off
excess oil and grease, remove debris and dispose of properly, and clean area
·
Secondary Digester
Þ
Check sludge level
Þ
Check floating lid and gas seal
*
Check condition of seal
*
Check height of lid
*
Check to see that lid is not
cocked and that it is freely moving up and down
*
Check for sludge messes on lid and
walls, and clean
Þ
Check fixed cover
*
Check seal
*
Check for gas leaks
Þ
Check gas pressure
Þ
Check regulator
Þ
Check pressure/vacuum relief valve
Þ
Check piping for leaks and failure
Þ
Check drip traps and drain when
necessary
Þ
Check digester temperature
Þ
Check room temperature, lights,
and ventilation
Þ
Check ventilation
Þ
Check motor (see motor below)
Þ
Check oil levels
Þ
Check furnace
*
Check temperature
*
Check flame to see that it is
proper
*
Check pilot light
Þ
Check heat exchanger
*
Check inlet and outlet water
temperatures
*
Check inlet and outlet sludge
temperatures
Þ
Check mixer
*
Gas mixer
à
Check compressor and motor (see
compressor and motor below)
à
Check drip traps and drain when
necessary
à
Check gas pressure
à
Check for leaks
à
Feel temperature of lines
*
Propeller or draft tubes
à
Check motor (see motor below)
à
Check to see that mixer is
operating
à
Reverse direction for propeller
mixer at least once daily
Þ
Withdraw supernatant
Þ
Perform housekeeping -- wipe off
excess oil and grease, remove debris and dispose of properly, and clean area
·
Check waste gas burner and pilot
light
·
Record gas production
Aerobic Digesters
·
Check tank surface for proper
aeration -- pattern and size of air bubbles
·
Check floc
·
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 motor (see motor below)
·
Check oil levels
·
Check flow for unusual colors and
odors
·
Check water level upstream, thru,
and downstream of the aerobic digester
·
Decant
·
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
Drying Beds
·
Check sludge
Þ
Progress of drying
Þ
Look for new water or sludge in
beds
·
Record number of beds in use
·
Perform housekeeping -- remove
debris and dispose of properly, and clean area
Biosolids Lagoon
·
Check dikes
Þ
Check the freeboard
Þ
Check for erosion
Þ
Check for damage
Þ
Remove emergent vegetation, such
as cattails
Þ
Check road for erosion, pot holes
Þ
Check for leakage outside of the
lagoons
·
Lagoons
Þ
Check level
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
Return to M&M Work Schedules
For more information, call 515-232-1663