Eric: Created Page + Added Basic Sections/Info

2025-12-01T14:22:17Z

Created Page + Added Basic Sections/Info

New page

=Basics=
*This page aims to go over the “Why, When, and How” a [[Biodigester]] would need to be [[Decommissioning|Decommissioned]]
*This is as a part of [[Design for Decommissioning]] / [[Cradle-to-Grave]] / Product Lifecycle Management etc

=Why=
*Nothing lasts forever, so EVENTUALLY some components will fail
*For some, such as a [[Macerator Pump]] etc, or some [[Biofouling]] , this will be a matter of ([[Preventative Maintenance|Preventative]] ) [[Biodigester Maintenance]]
*Large Accumulation of [[Sludge]] / [[Digestate]] Precipitate and/or Leaks forming in the [[IBC Tote]] (or other “main” container) COULD BE solved via a small scale equivalent of [[Shutdown Work]] and “bandaid fixes” such as Cleaning then Lining the tank (in a manner akin to [[Cured-In-Place-Pipelining]] ) or converting the tank to a smaller [[PVC Tank Liner]] system (or equivalent) ARE POSSIBLE but are similarly expensive for a less “complete” fix, and often introduce their own problems/risks
*This, combined with eventual Moves/Changes in Desires/[[Demolition]] etc EVENTUALLY means that a Full Decommissioning (or at least [[Demolition to Slab then Rebuild]] will be needed

=When=
*When Major Components, such as the [[IBC Tote]] are reaching the end of their [[Service Life]]
**As per the principles of [[Preventative Maintenance]] , as well as the costs of [[Emergency Response]] work (in that a Plumber or additional help when you can afford to “shop around” vs when your house is flooding with [[Blackwater]] etc, there is an advantage in swapping a tank SLIGHTLY before it’s [[EOSL]] date, despite there being SOME waste in this.
*Forming a [[Decision Making Matrix]] type [[Biodigester Routine Inspection Checklist]] + Having an [[Inspection Schedule]] (+ Potential Routine PM) would be worthwhile
**While WAY less easy, especially in tough times, having a gradually Saved Up Fund, or some sort of non-crappy decentralized insurance / [[Biodigester as a Service]] plan is advisable (Depending on the cost of the whole endeavor
**Depending on the [[Product Lifespan]] / [[Service Life]] of the biodigester, this may become an issue of [[Intergenerational Wealth]] / [[Intergenerational Debt/Liability]] too wherein for the Parent who buys it, it works great, but upon their death the kids ALSO have to clean up a Dry Rotted IBC Tote leaking Blackwater in their house (before selling it or something etc) which is something noone would want to be dealing with then

=How=
==Initial Shutdown==
*RE [[Biodigester Shutdown]] BUT
*All power going to it will be [[Lock Out Tag Out]] shut off at minimum, “Air Gapping” / “ [[Isolation of Hazardous Energy| Isolated]] “ is preferable
**Although IN THE PROCESS of Airgapping/“Frying Pan”-ing off stuff, work under LOTO will need to be done
*Once all the [[Hazardous Energy]] (Mainly electrical, although leaking Water/Greywater is a low risk but related concept) (Residual [[Biogas]] is a related concern, and [[Fuel Tank Inerting]] / HEAVY rinsedown with water/soap or [[Degreaser]] is advisable pre-doing any work
**Much of this would be pending a [[Site Specific Job Hazard Analysis]] and a [[Tailgate Safety Meeting]] with the whole crew (Although Templates/MOST of the points could be made and put on this page in advance)

==Removal of Majority of Product==
*This could be done via Gravity Drainage, although a [[Macerator Pump]] (potentially the built in one, although a “Decomissioning Cart” / [[Skid Mount]] type thing may be nice too) or [[Vac Truck]] is preferable
*Attaching A [[Cam Lock]] fitting (2in or up) to the Biodigester would aid in this
*IBC Totes CAN be rinsed out, but a [[Cone Bottom Tank]] woild be especially useful for this as well
*Trying to Pump Out Before Rinsing can reduce volume of [[Industrial Wastewater]] (although depending on content/regulation compliance issues etc this could MAYBE be pumped into another [[Biodigester]] system, in a manner to [[RV Pumpouts]] via [[Macerator Pump]] into Municipal (Home) Sewer
**HOWEVER if sludge/precipitate is especially thick, using a [[Pressure Washer]] or [[Chicago Hose]] to “get it going” / liquify things may be required
**[[Tank Materials]] / [[Tank Linings]] and Routine Maintenance will reduce this difficulty however

==Cleaning Process==
*It is difficult to clean what one cannot see or access
*A [[Clean in Place]] Tool such as a “Gamma Jet” can work, although as of now these are rather pricey, and similarly require high PSI/GPM Pressure Washers
**Furthermore some do not “like” Hot Water from [[Hot Water Pressure Washers]] which MAY be of use otherwise
*Either way suction/pumping is kept on, and the tank is Rinsed (with optional occasional spray of Degreaser / Soap / Solvents etc) until it is considered “Clean”
**[[How Clean is Clean]] is another important consideration, worth putting down in Paperwork+Communicating to ALL workers
**In the case of Decommissioning however “ [[Demolition Clean]] “ / “ [[Scrap Clean]] “ / “ [[DOG Transportable Clean” is probably all that is required
**To what degree the debris will get “stuck” in the plastic like Pasta Sauce in Clear Plastic Leftover Bins is another bit to consider

==Final Disassembly and Removal==
*Final Assemblies can be Dissasmbled
*Larger Objects can be transported via a [[Flatbed Truck]] / [[Low Bow Truck]] / [[Lift Gate]] / Box Truck]]
*Another option would be more conventional dumpsters / [[Roll Off Boxes]]
*While it isn’t great for reuse/recycling, using a [[Reciprocating Saw]] (Sawzall) or [[Oscillating Tool]] (“Multitool”), may be necessary to make larger components into workable pieces
*Cleanup of any Splatter, as well as “hidden dust” with a Broom/Dustpan then Vacuum and/or Mop etc is also advisable vs “rip it out and run”

==Final Documentation of Recovered Materials + Waste Management==
*[[Reuse | Reusable]] components can be collected + cleaned + logges
*Recyclable Scrap/Materials are sorted and sent to those locations + logged
*”Waste” is set aside for [[W2E]]

=Internal Links=
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=External Links=
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Biodigester Decommissioning - Revision history

Eric: Created Page + Added Basic Sections/Info