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Gasification of Level 4 Organic Wastes

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  • Gasification of Level 4 Organic Wastes

    Under the Waste Transformation model, Level 4 organic wastes...low value non-putrescent materials...are gasified to produce high-grade heat and biochar.

    Dr Paul Olivier has designed a range of small top it updraft (TLUD) gasifiers that burn level 4 wastes like rice hulls, nutshells and other dry wastes of consistent particle size. These little units are ideal replacements for the smoky solid fuel stoves often used in developing countries. Read more about them...HERE.

    Paul has even developed a roaster attachment capable of roasting a kilogram of coffee beans. You can see a video...HERE.
    "All truth passes through three stages. First, it is ridiculed. Second, it is violently opposed. Third, it is accepted as being self-evident." - Arthur Schopenhauer

    www.garydonaldson.net - my main website.

    https://www.facebook.com/gary.donaldson.161 - my Facebook page.

    https://www.facebook.com/groups/1167267703372756/ - my Microponics and Waste Transformation Farming Facebook Group

    https://www.facebook.com/groups/1318946951452383/ - my iAVs Facebook Group

    www.urbanaquaponics.com.au - the current home of the Online Urban Aquaponics Manual.

  • #2
    Last night, I was treated to a home-cooked meal of Tennessee-style pork ribs, chips (fries) and grilled vegetables...cooked on a gasifier fuelled by rice hulls. Burning rice hulls in the gasifier not only provided the heat to grill the food but it also yielded several litres of high quality granular biochar. This is waste transformation at its best.
    "All truth passes through three stages. First, it is ridiculed. Second, it is violently opposed. Third, it is accepted as being self-evident." - Arthur Schopenhauer

    www.garydonaldson.net - my main website.

    https://www.facebook.com/gary.donaldson.161 - my Facebook page.

    https://www.facebook.com/groups/1167267703372756/ - my Microponics and Waste Transformation Farming Facebook Group

    https://www.facebook.com/groups/1318946951452383/ - my iAVs Facebook Group

    www.urbanaquaponics.com.au - the current home of the Online Urban Aquaponics Manual.

    Comment


    • #3
      Hi Gary
      I miss a picture of the biochar prouced from one cooking
      Also wondering if these gasifiers are available for sale for me in Europe ?
      I think it would/could, make a nice camping/outdoors cooking tool alternative, you can run them on uniform zized woodpellets I take it ?

      cheers

      Comment


      • #4
        Hi Ande...I don't think they are sold in Europe but you may be able to import one from Vietnam. I'll ask the person responsible for getting them built over here. The very small unit...like the one that I have at home...would be perfect for camping. Wood pellets are a perfect fuel for them...providing a useful burn time and excellent biochar.

        The amount of biochar that you get from each burn is approximately that the volume of the combustion chamber. The fuel largely maintains its form with only a small reduction in overall volume.
        "All truth passes through three stages. First, it is ridiculed. Second, it is violently opposed. Third, it is accepted as being self-evident." - Arthur Schopenhauer

        www.garydonaldson.net - my main website.

        https://www.facebook.com/gary.donaldson.161 - my Facebook page.

        https://www.facebook.com/groups/1167267703372756/ - my Microponics and Waste Transformation Farming Facebook Group

        https://www.facebook.com/groups/1318946951452383/ - my iAVs Facebook Group

        www.urbanaquaponics.com.au - the current home of the Online Urban Aquaponics Manual.

        Comment


        • #5
          Yesterday, I observed another firing of a small top lit updraft gasifier. Once again, the fuel was rice hulls...but, this time, it was the 100 model....the smallest one (just like the one I bought on my previous trip to Vietnam in 2015.

          I've also attached a photo of a coffee roaster (capacity about 1.7kg) that fits on the Model 150 that I saw trialled several days ago.
          "All truth passes through three stages. First, it is ridiculed. Second, it is violently opposed. Third, it is accepted as being self-evident." - Arthur Schopenhauer

          www.garydonaldson.net - my main website.

          https://www.facebook.com/gary.donaldson.161 - my Facebook page.

          https://www.facebook.com/groups/1167267703372756/ - my Microponics and Waste Transformation Farming Facebook Group

          https://www.facebook.com/groups/1318946951452383/ - my iAVs Facebook Group

          www.urbanaquaponics.com.au - the current home of the Online Urban Aquaponics Manual.

          Comment


          • #6
            I forgot to mention that the burn time for the small Model 100 gasifier...using rice hulls...is about 20 minutes...enough to cook breakfast. If you use wood pellets, the burn time is extended to about 90 minutes.
            "All truth passes through three stages. First, it is ridiculed. Second, it is violently opposed. Third, it is accepted as being self-evident." - Arthur Schopenhauer

            www.garydonaldson.net - my main website.

            https://www.facebook.com/gary.donaldson.161 - my Facebook page.

            https://www.facebook.com/groups/1167267703372756/ - my Microponics and Waste Transformation Farming Facebook Group

            https://www.facebook.com/groups/1318946951452383/ - my iAVs Facebook Group

            www.urbanaquaponics.com.au - the current home of the Online Urban Aquaponics Manual.

            Comment


            • #7
              Biochar is, along with high grade heat, a byproduct of gasification of Level 4 organic wastes. I found this useful document on Biochar...HERE.
              "All truth passes through three stages. First, it is ridiculed. Second, it is violently opposed. Third, it is accepted as being self-evident." - Arthur Schopenhauer

              www.garydonaldson.net - my main website.

              https://www.facebook.com/gary.donaldson.161 - my Facebook page.

              https://www.facebook.com/groups/1167267703372756/ - my Microponics and Waste Transformation Farming Facebook Group

              https://www.facebook.com/groups/1318946951452383/ - my iAVs Facebook Group

              www.urbanaquaponics.com.au - the current home of the Online Urban Aquaponics Manual.

              Comment


              • #8
                I couldn't resist bringing one of Paul Olivier's Model 150 gasifiers back home with me. I intended to get the coffee roaster attachment, too...but then I remembered that I don't even drink coffee - much less process it.
                "All truth passes through three stages. First, it is ridiculed. Second, it is violently opposed. Third, it is accepted as being self-evident." - Arthur Schopenhauer

                www.garydonaldson.net - my main website.

                https://www.facebook.com/gary.donaldson.161 - my Facebook page.

                https://www.facebook.com/groups/1167267703372756/ - my Microponics and Waste Transformation Farming Facebook Group

                https://www.facebook.com/groups/1318946951452383/ - my iAVs Facebook Group

                www.urbanaquaponics.com.au - the current home of the Online Urban Aquaponics Manual.

                Comment


                • #9
                  I've been hoping that, sooner or later, I'd overcome my inhibition around gasification...and actually do it.

                  Well, this morning wasn't that time.

                  I attempted to use one of my gasifiers to convert wood pellets into high-grade heat and biochar. While things got hot, and I did end up with some black stuff that looks like biochar (although much less than I'd have expected), I don't think I achieved gasification.



                  I started by assembling all of the stuff....the gasifier, wood pellets, steel wool, and a lighter.

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                  I filled the gasifier with wood pellets and inserted some coiled steel wool. When lit, the steel wool acts as a source of radiant heat - to light the wood pellets evenly.

                  I lit the steel wool. It seemed to be working but, when it had burned out, it had not ignited the pellets. So, I tore up some strips of cardboard and used them to get the pellets burning. That was successful.

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                  Although there was vigorous burning, the colour of the flame suggests that the pellets were burning rather than giving off the syngas that should have been evident.

                  I tried different air flow rates...



                  ...and the burn continued until the flame extinguished itself.

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                  Anyway, long story short, this is what I ended up with....about a quarter of the volume of the wood pellets that I started with.

                  With gasification (like everything else), seeing ain't doing.

                  Suffice to say, I have to consult with the experts. More later.
                  "All truth passes through three stages. First, it is ridiculed. Second, it is violently opposed. Third, it is accepted as being self-evident." - Arthur Schopenhauer

                  www.garydonaldson.net - my main website.

                  https://www.facebook.com/gary.donaldson.161 - my Facebook page.

                  https://www.facebook.com/groups/1167267703372756/ - my Microponics and Waste Transformation Farming Facebook Group

                  https://www.facebook.com/groups/1318946951452383/ - my iAVs Facebook Group

                  www.urbanaquaponics.com.au - the current home of the Online Urban Aquaponics Manual.

                  Comment


                  • #10
                    Today, I made the second attempt to make biochar...having consulted with Paul Olivier. Arising out of that conversation - and today's effort - it seems that I actually made biochar on my previous attempt. Regrettably, some of it was burned because I failed to discontinue the process when the syngas was exhausted.

                    I also learned that different feedstocks behave in different ways. For example, the pine wood pellets that I'm using currently do not gasify with a blue flame (but rather a yellow one)...and the volume of biochar produced is less...about 50% of the orginal volume of the wood pellets. I also managed to terminate the burn at the correct time so I ended up with a satisfying haul of biochar this time.

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                    While I'd have judged the flame in the photo to be combustion rather than gasification, it turned out to be the syngas that was burning rather than the wood pellets. The flame also behaves very differently when a pot is placed on the gasifier.
                    "All truth passes through three stages. First, it is ridiculed. Second, it is violently opposed. Third, it is accepted as being self-evident." - Arthur Schopenhauer

                    www.garydonaldson.net - my main website.

                    https://www.facebook.com/gary.donaldson.161 - my Facebook page.

                    https://www.facebook.com/groups/1167267703372756/ - my Microponics and Waste Transformation Farming Facebook Group

                    https://www.facebook.com/groups/1318946951452383/ - my iAVs Facebook Group

                    www.urbanaquaponics.com.au - the current home of the Online Urban Aquaponics Manual.

                    Comment


                    • ande
                      ande commented
                      Editing a comment
                      Hi Gary this post does not appear in the search function "Today's Posts" even dough it's posted today ?
                      I found it thru a notification because I follow the thread. Some forum bug ?
                      cheers
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