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Thread: Offline Chaff Cleaner

  1. #1
    Senior Member GrahamK's Avatar
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    Offline Chaff Cleaner

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    I wondered if any of you superb "gadget making" types have had a go at creating a small post-roast chaff extractor or cleaner. The Hottop does an excellent job of all the other aspects of roasting including cooling, but as you possibly know, its chaff extraction can be a bit ordinary. This is not a big problem for myself, but when providing beans to others I would prefer to have them a bit cleaner. I usually swirl them around in a collander and blow on them, but besides the hygenic aspects of that, its no great shakes especially if the wind is blowing the wrong way, not to mention the bouts of dizziness that follow. [smiley=embarassed.gif]

    I have noticed a few setups using vacuum cleaners and 5kg plastic buckets and pipes everywhere designed for cooling/chaff collection, but I envisioned something a bit smaller just for 250g-500g batches.

    Any ideas for a starting point?

    Graham

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    Re: Offline Chaff Cleaner

    Quote Originally Posted by 77425158515D7B300 link=1276125334/0#0 date=1276125334
    I wondered if any of you superb "gadget making" types have had a go at creating a small post-roast chaff extractor or cleaner.
    You have the right idea... just pour the beans through the air from one container to another in front of (or behind) a fan. When the chaff is blown away and the beans are not on the floor, you have the correct distance and fan speed. Its how the chaff was separated from teh wheat in the old days... Green wind power!

    I used the fan method to clean about 25 pounds of the filthiest "sweep" you can find- bits of pop rivets, jute strings, dust, dirt, pebbles, telephone hook up wire, etc. I laid out a tarp and used a high speed fan and just poured the coffee in front of the fan.

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    Re: Offline Chaff Cleaner

    I just remove the cooling tray with the beans in it and give it a bit of a shake over the garden, seems to work fine.

    Just an idea, but if you have a popcorn popper you dont need you could (safely!) disconnect the heating element and just put the beans in that. The airflow should be enough to blow out the chaff without removing the beans. You may have to do it in two batches but I reckon itd work. Ill give this a try next time I do a roast, my old Popasaurus never had enough heat to roast past FC so I think it can be gutted! ;)

    Greg

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    Re: Offline Chaff Cleaner

    Quote Originally Posted by 5045525047425B5B5A5659370 link=1276125334/2#2 date=1276133200
    I just remove the cooling tray with the beans in it and give it a bit of a shake over the garden, seems to work fine.
    Thats the go, some beans need more than others but a bit of a shake and a swirl in the breeze gets them chaff free. I had toyed with the idea of a bigger fan but then the chaff would finish up all over my roasting area instead of over the garden so I hadnt bothered.

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    Senior Member GrahamK's Avatar
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    Re: Offline Chaff Cleaner

    Well, I eventually decided to create my own Heath-Robinson style chaff cleaner in the true CoffeeSnobs spirit, so I am posting the results with pictures for interest sake. While the other suggestions were workable, they could be troublesome in my circumstance. So I tried the following:

    The first was a Plastic cereal style container with a hole made to slot in an attachment for a handheld Dyson vacuum, and some stainless mesh in the bottom. Holes are also needed underneath to suck the air up, just enough of them to prevent the beans getting sucked up, but allowing the chaff to do so.

    The second is a cheap salad spinner, with holed drilled in the bottom for similar reasons, and a hole in the top to insert a vacuum as well.

    I actually found that both of them work to a degree, and by using both, it really helps clean up the chaff. I use the salad spinner first WITHOUT the vacuum in fact, just spin the beans back and forth briefly, and a fair proportion of the chaff drops through the basket or sticks to the side. I then empty into the cereal container, with the vacuum attached close the lid and shake it around with the vacuum going for final cleaning.

    Bear in mind its only for small amounts 200g-250g. The Yemen for instance, really needed cleaning up, but it was also more troublesome because of so many small beans getting through the mesh basket. But I had fun anyway *[smiley=happy.gif]

    Graham








  6. #6
    Senior Member Koffee_Kosmo's Avatar
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    Re: Offline Chaff Cleaner

    Sorry I am coming in late to the thread

    An easy way to remove chaff and you dont need to buy or make anything except to use 2 household devices

    1] A colander or a salad bowl
    2] A hair drier

    Just shake the beans around while blowing over them with the hair drier

    It works a treat

    KK


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    Senior Member GrahamK's Avatar
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    Re: Offline Chaff Cleaner

    That sounds pretty good KK, But where does the chaff end up? that was my problem. If you have easy access to outside, then the hairdryer is a much simpler option, I am attempting to prevent a major cleanup job afterwards. *[smiley=sad.gif]

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    Re: Offline Chaff Cleaner

    Hey GrahamK how does the salad spinner go...I was thinking about this the other day. After my roast and trying to pour without a spout and separate chaff got all messy. Does the chaff get removed from beans without the need of a hoover ? Or does this need the vacuum to get things going. Wondering if I could use my bean cooler and place the salad spinner on top to get the chaff. But still needs tidy up unless in the garden and it becomes part of the garden :).

  9. #9
    Senior Member Yelta's Avatar
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    Re: Offline Chaff Cleaner

    The roasted beans from my Coretto are 99% chaff free on roast completion, the heat gun expels the chaff from the breadmaker and a strategically placed fan blows most of it through an open shed window into the chook yard :D whatever hits the shed floor is just a matter of a quick broom job at end of roast.
    Any chaff that remains with the beans is removed through the large mesh of my bucket cooler and expelled onto the floor, guess I could arrange a chaff collector under the cooler but there is that little its not worth the effort.
    So with no effort on my part my finished product is completely chaff free. ;)

  10. #10
    Senior Member Yelta's Avatar
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    Re: Offline Chaff Cleaner

    Quote Originally Posted by 4570636A636F49020 link=1276125334/6#6 date=1278450272
    That sounds pretty good KK, But where does the chaff end up? that was my problem. If you have easy access to outside, then the hairdryer is a much simpler option, I am attempting to prevent a major cleanup job afterwards. *[smiley=sad.gif]
    A bucket cooler with a large mesh sieve and a chaff collection bag attached to the bottom will solve the problem cheaply and effectively.
    Simply tip the roasted beans into the sieve agitate with a wooden spoon for 30 seconds or so (I use a paint scraper) or similar) and the beans are chaff free.
    Ive mentioned the large mesh gem sieve before but it went down like a lead balloon, too expensive, unnecessary etc, but the fact is it works.
    Promise I wont mention it again. ;)

  11. #11
    Sleep is overrated Thundergod's Avatar
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    Re: Offline Chaff Cleaner

    When using my previous corretto, a pedestal fan blowing above took care of the chaff as it was expelled from the roasting chamber.
    From there it found its way into the garden.

    With my new KKTO, most of the chaff is collected in the second pot.
    Any left over is taken care of by said fan and pouring between my new and old cooling sieves several times.

  12. #12
    Senior Member GrahamK's Avatar
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    Re: Offline Chaff Cleaner

    Quote Originally Posted by 2E3E323131322D2E5D0 link=1276125334/7#7 date=1278458866
    Does the chaff get removed from beans without the need of a hoover ?
    Hi Scollops,

    I actually found the ol cheap salad spinner does a reasonable job without the vacuum, and without the holes required for the vacuum it should drop less onto the bench top.

    Because I roast under the range-hood in the kitchen I do not have easy access to to the "chook yard", and the chaff embedded into the carpet in a trail to the balcony prompted my needing something. I have no real need for a cooler, being one of the good features of a Hottop, but reckon integrating a chaff collector into a cooler would be a good way to go as suggested.

    Graham

  13. #13
    Senior Member Yelta's Avatar
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    Re: Offline Chaff Cleaner

    Behmor Coffee Roaster
    Quote Originally Posted by 5F6A7970797553180 link=1276125334/11#11 date=1278475685
    I do not have easy access to to the "chook yard"
    Thought that may draw a comment, :D



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