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  1. dirkbouma

    Where to Find Factory Specification Drawings??

    I sometimes buy my parts on Ebay and have to identify what is what before I do. I use the Ron Ayers website, which has all the parts of many motorcycles, in 3-d diagrams. It covers my Kaw Vulcan 750, and the diagrams are entirely broken down. Cannot say if it has the detail you need, though...
  2. dirkbouma

    Soil bentonite slurry wall, maximum bottom slope

    Consider: your slope on your sidewalls is vertical. The S/B holds them up. Why would it be any different for the floor?
  3. dirkbouma

    Anaerobic digester accident

    The real danger has to do with confined spaces. Aerobic digestion takes place 9x faster than anaerobic, and will use up the oxygen well in advance of significant methane production. Putting personnel in a confined space without oxygen would be a more significant hazard.
  4. dirkbouma

    Anaerobic digester purge

    Agree with your senior engineer. Normal microbial consortia in digesters will use up the oxygen, converting it to CO2. Gas production pressurizes your system, so you shouldn't need to purge.
  5. dirkbouma

    Shop: Protection for Stainless Work

    This is an amazing thread, thank you all! A landfill gas pilot project has had two failures of a S/S bellows pump (the sales engineer has not been helpful in describing the composition of the stainless steel, other than to say it is not passivated). In one case corrosion appears to be the...
  6. dirkbouma

    Spill cleanup

    An article detailing the nature and source of releases of drycleaning fluids (contamination) in Florida can be found at http://www.drycleancoalition.org/download/leaks/ . I also very much like the article at...
  7. dirkbouma

    Wastewater 'decant' tank

    Does the density change in each of the phases signficantly? Are there suspended solids? elguero notes separation issues without mentioning parallel plate clarifiers or centrifuges, both which are used for more rapid approaches to separation if needed. bimr's approach is sensible, but there...
  8. dirkbouma

    earthen houses

    According to Dominic Dowling, about a third of the world's population lives in mud-brick houses. His note is hopeful and pragmatic regarding construction in earthquake prone areas: http://www.abc.net.au/ra/innovations/stories/s1473553.htm Personally, having survived the Loma Prieta...
  9. dirkbouma

    nickel in spent pickling acid

    Hi Ken, The references to compounds containing 75% dioxane should include a disclaimer on the environmental aspects... it is characterized by USEPA as a Class II B potential carcinogen, and the regulatory picture is firming up with respect to its use, treatment and disposal in the U.S. The...

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