Advanced Maintenance Provider  Aeration Equipment …

Advanced Maintenance Provider Aeration Equipment …  Outline / Objectives…  Function / Purpose  Regulatory Requirements  Types by Functionality  Maintenance Activities  Tools  Trouble Shooting  Safety Concerns

Advanced Maintenance Provider Aeration Equipment …  Function / Purpose …  Used to supply air (oxygen) to the delivery system in aeration chamber of aerobic plant.

Advanced Maintenance Provider Aeration Equipment … Aeration Equipment …  Regulatory Requirements …  Maintain manufacturer’s specifications at NSF testing for plant size.  Air Flow  Air Pressure  NOTE: Make & Model may change !  Maintained according to manufacturer’s specifications.

Advanced Maintenance Provider Aeration Equipment … Aeration Equipment …  Types by Functionality…  Air Generation  Compressors  Rotary  Linear  Aerators  Air Supply  Air Delivery  Aspirator  Diffusers  Piping with slotted or drilled holes

Advanced Maintenance Provider Aeration Equipment … Aeration Equipment …  Types … Compressors  Rotary  Motor rotating disk with 3-4 carbon vanes.

Advanced Maintenance Provider Aeration Equipment … Aeration Equipment …  Types … Compressors  Linear  Shuttle arm attached to diaphragms

Advanced Maintenance Provider Aeration Equipment … Aeration Equipment …  Types … Aerators  Used in Jet & Norweco systems.  Hollow shaft extending into water.  Aspirator shears air into small bubbles.

Advanced Maintenance Provider Aeration Equipment … Aeration Equipment …  Types … Aerators  Used in Multi-Flow systems.  Located 12” off bottom of aeration chamber.  Motor turns impeller which reduces pressure to draw air through air pipe.

Advanced Maintenance Provider Aeration Equipment … Aeration Equipment …  Types … Air Supply  Piping … Compressors  Hollow Shaft – Aerators - Jet & Norweco  Air Intake Pipe – Aerator - Multi Flow

Advanced Maintenance Provider Aeration Equipment … Aeration Equipment …  Types … Air Delivery  Aspirator

Advanced Maintenance Provider Aeration Equipment … Aeration Equipment …  Types … Air Delivery  Aspirator

Advanced Maintenance Provider Aeration Equipment … Aeration Equipment …  Types … Air Delivery  Diffusers

Advanced Maintenance Provider Aeration Equipment … Aeration Equipment …  Types … Air Delivery  Pipe with drilled holes

Advanced Maintenance Provider Aeration Equipment … Aeration Equipment …  Maintenance Activities …  Check Pressure / Air Flow  ? Within Manfg. Specs.  ? Flock level in plant  ? Summer vs Winter

Advanced Maintenance Provider Aeration Equipment… Aeration Equipment…  Maintenance Activities …  Check Temperature  ? Too Hot to hold hand on  High temperatures shorten life on …  Bearings  O-Rings  Diaphragms

Advanced Maintenance Provider Aeration Equipment… Aeration Equipment…  Maintenance Activities…  Check Noise  ? Rubber sounding thump  ? Metal pinging / grinding  Indicators of …  Diaphragms / bearings going out  Sticking vane

Advanced Maintenance Provider Aeration Equipment… Aeration Equipment…  Maintenance Activities…  Check for signs of water

Advanced Maintenance Provider Aeration Equipment… Aeration Equipment…  Maintenance Activities…  Check for signs of ants  NOTE: Report to customer!

Advanced Maintenance Provider Aeration Equipment… Aeration Equipment…  Maintenance Activities…  Ant solution …  Ant Poison  Elevate Compressor  Medicated cattle ear tags  Do Not Apply Poison!!!!  Why?  License Needed  Lasts about 30 days  Liability

Advanced Maintenance Provider Aeration Equipment… Aeration Equipment…  Maintenance Activities…  Clean Filters  Check O-Rings  Check Filter Housing  Clean Air Shaft  Clean Aspirator  NOTE: Re-check pressure after cleaning filters

Advanced Maintenance Provider Aeration Equipment… Aeration Equipment…  Maintenance Activities…  Clean Air Shaft  Clean Aspirator  Check for vibration  Look for buildup or debris on foam restrictor / shaft  NOTES…  Re-check air flow after cleaning shaft or aspirator.  Never put pressure on shaft

Advanced Maintenance Provider Aeration Equipment… Aeration Equipment…  Maintenance Activities …  Change out / Clean diffusers ???  NOTE: Depends on your contract !

Advanced Maintenance Provider Aeration Equipment…  Tools…  Air Gauges  Brushes to clean air shafts and aspirators  Spray bottle with soapy water to detect air leaks

Advanced Maintenance Provider Aeration Equipment… Aeration Equipment…  Trouble Shooting…  Low Air Flow  Causes …  Restricted or clogged air intake on shaft or aspirator  Aerator may be installed too deep  NOTE: Never run Multi Flow with less than 2’ of water covering it

Advanced Maintenance Provider Aeration Equipment… Aeration Equipment…  Trouble Shooting…  Low Pressure  Causes …  Restricted or clogged air intake filter

Advanced Maintenance Provider Aeration Equipment… Aeration Equipment…  Trouble Shooting…  Low Pressure  Causes …  Leak on output side of compressor  Filter Housing  Gasket

Advanced Maintenance Provider Aeration Equipment… Aeration Equipment…  Trouble Shooting…  Low Pressure  Causes …  Worn / stuck vanes  Worn diaphragms  Check valve flap  Crack in tubing from diaphragms to air chamber in base.

Advanced Maintenance Provider Aeration Equipment… Aeration Equipment… Trouble Shooting… Trouble Shooting… Low PressureLow Pressure Causes … Causes … Leak in air supply line due to…Leak in air supply line due to… Heat Heat Ground shifting Ground shifting

Advanced Maintenance Provider Aeration Equipment… Aeration Equipment…  Trouble Shooting…  Low Pressure  Causes …  Cracked or blown…  Diffuser  O-Ring  Air Yoke  Air Drop

Advanced Maintenance Provider Aeration Equipment… Aeration Equipment…  Trouble Shooting…  Water on filters.  Hint … High Pressure and Humidity  Results in …

Advanced Maintenance Provider Aeration Equipment… Aeration Equipment…  Trouble Shooting…  Pressure different at compressor and tank.  Causes …  What about friction loss? (This was a 147’ run!) (This was a 147’ run!) Check manufacturer’s requirements!

Advanced Maintenance Provider Aeration Equipment… Aeration Equipment…  Trouble Shooting…  High Air Pressure  Causes …  Clogged air supply line  Clogged air diffuser

Advanced Maintenance Provider Aeration Equipment… Aeration Equipment…  Trouble Shooting…  Un-even air flow on diffusers / dead zones  Causes …  Un-level tank installation  Air drops different length  Clogged diffusers  Build up

Advanced Maintenance Provider Aeration Equipment… Aeration Equipment…  Safety Concerns …  Electrical  Bacterial  Chemical  Animal / Insect  Snakes  Spiders  Wasps