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Thread: Filter Large Particles

  1. #1
    Join Date
    Sep 2018

    Filter Large Particles

    We are using some fruit powders (ie and dried herbs to flavour kombucha.

    We then need to filter all of this out. What would be the best way to do this?

    We have a plate filter but it would get blocked up pretty quickly. This looked pretty good but I think it would get blocked up as well:

    We are doing batch sizes of 1000 litres.

  2. #2
    Join Date
    Oct 2013
    Stuart, FL
    Define the particle size(s) you have and use the proper sized medium in your plate filter. I am guessing your filter has sheets that compress with a screw mechanism?

    If you have one, or can source one from the filter manufacturer, put in a diverter plate so you can use two different pore sheets on one pass. Either way, you want pores large enough to trap the particulate (depth filtration) and not so tight the filter blinds (coats without penetrating). Two stage filtration should allow you to remove larger particulate first to help prevent blinding.

    Alternately, use a fining agent first to reduce the solid load, then filter with appropriately sized sheets. If you are using loose DE, the try a more coarse grade. Be sure to filter at the appropriate flow rates too. A lot of filtration issues come from operations.

  3. #3
    Join Date
    Aug 2018
    Hickory, NC

    Lots of ways to help

    When it comes to filtering you want to make sure that you can get the liquid cold and that you can leave it to settle after your additions. Brewers that dry hope with pellets will have a particle load similar to what you're experiencing and the first step is to cold crash and let it settle. The second is to make sure that you're doing this in a cylindroconical tank with a racking arm (sorry if you already know this). Then you just position the racking arm to sit just above the sediment layer you want to avoid. From there there are a few solutions to help but the one I'd try first is to simply put something like this, inline with a plate and frame filter. The stainless strainer will catch larger particles, we use one when we rack out of bourbon barrels to catch char. Another option is the diverter plate that was already suggested, for a 10bbl batch that would likely be sufficient assuming you have an appropriately sized plate and frame. Secondly, you could play around with fining agents, reach out to a supplier like Gusmer and they can give you advice and more importantly samples to try out.

    Good luck,

  4. #4
    Join Date
    Aug 2018
    New Zealand
    Check out this thread for a little bit of a cheaper option than gw kent.

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