soma_seeker Posted July 20, 2016 Hey people So I'm going to start working with horse poo for the first time. What I'd really like is to find an electric turkey roaster to use for the pasteurisation of my substrate! (like this one http://www.ebay.com.au/itm/BELLA-13425-Turkey-Roaster-Oven-18-Quart-Stainless-Steel-/112055999234?hash=item1a170edb02:g:dngAAOSwzLlXhwa9 ) The problem is I can't find them for sale ANYWHERE in Australia, and buying from the US doubles the price due to shipping Has anyone looked into buying one of these or something similar before? Are there any significant alternatives I can look into? I've used simpler hot water/bucket methods before when working with coir, but with poo I'd really like to be more precise... Cheers! Share this post Link to post Share on other sites
theuserformallyknownasd00d Posted July 20, 2016 Buy a thermometer and a few big blankets for your bucket tek? Thermo to measure perfect temp and blankets to insulate tub once it reaches perfect temps. Share this post Link to post Share on other sites
theuserformallyknownasd00d Posted July 20, 2016 If all you wanna do is pasteurise horse poo you don't need to spend $100. Share this post Link to post Share on other sites
El Presidente Hillbillios Posted July 20, 2016 ive done it in an esky for a few years 3 Share this post Link to post Share on other sites
soma_seeker Posted July 20, 2016 Fair enough, scrap that idea I guess. It did just seem quite effective and easy, figured it would be worth it in the long run if I could pick one up for $100 or less... Which of these methods would the community recommend? 1. Heating water to temp and transferring to an esky 2. Heating water and sealed bags in a large pot over a gas stove with thermometer and close observation/flame adjustment Cheers Share this post Link to post Share on other sites
El Presidente Hillbillios Posted July 20, 2016 i reckon a few smaller bags rather than one big bag. Lay them out in your esky. get your pot of water upto the temp you need and then tip it in. maybe sure you dont have air in the bags so they dont float. Then just close the lid for an hour or so. while thats happening you can get another pot upto temp, if you want a longer pasturisation 1 Share this post Link to post Share on other sites
soma_seeker Posted July 20, 2016 Cheers This is shameful as an Aussie but I don't actually own an esky! (been living abroad the last couple of years) Think this would suffice? I'll be prep'ing substrate for 1 50L monotub at a time. http://www.kmart.com.au/product/table-top-cooler/819333 Share this post Link to post Share on other sites
Cue Posted July 20, 2016 I use my oven. In fact my oven is full now. For pasteurization you want the substrate between 60C and 71.11C (I'm American so 71.11C is what the F to C calculator gives me for 160F). And you want even the center of the substrate to be with those margins for atleast 2 hours. Now I use straw so I like it even longer 12-24 hours. This should help explain much of why we do what we do. http://extension.psu.edu/publications/ul210 5 Share this post Link to post Share on other sites
soma_seeker Posted July 21, 2016 (edited) Nice. A good friend of mine did his PhD at Penn State. I actually just spent the past year of mine in the US too. I'd thought that the oven might be a viable option, but then I thought that your standard kitchen oven might struggle to maintain a constant and precise temp. within that low a range... A lab oven however Edited July 21, 2016 by soma_seeker Share this post Link to post Share on other sites
Etho Posted July 21, 2016 (edited) Load oven trays with mixture just past field capacity, cover with 2 layers of foil. If your oven has a 'keep warm' setting do a trial run too see what tempreature it attains after 1.5hrs in the centre and edges of the tray, if all good pasteurise for 1.5-2hrs. Done it this way for countless times with no contamination issues across multiple species. Any questions fire away, Edited July 21, 2016 by Etho 2 Share this post Link to post Share on other sites
soma_seeker Posted July 21, 2016 Thanks I hadn't heard of that approach. Would be much safer for me too since I have a gas oven (would avoid the risk of putting flammable oven/spawn bags in an oven that has a naked flame). I also have a digital thermometer with a wired probe. Whatever approach I go for I was planning on having the probe in the centre of one of the containers of material. That way I can start my timer when the temp. reads 65 C. What do you think? Share this post Link to post Share on other sites
waterboy 2.0 Posted July 21, 2016 (edited) Quote I use my oven. In fact my oven is full now. lol..the Mrs would KILL me Cue thats a cooler Soma It'll probably leak, go a hard one if going that way It'll hold heat better and will last forever. or a Chilly Bin if ya are of kiwi heritage Edited July 21, 2016 by waterboy 2.0 Share this post Link to post Share on other sites
soma_seeker Posted July 21, 2016 Righto, cheers The oven method is looking good to me at the moment... Share this post Link to post Share on other sites
El Presidente Hillbillios Posted July 21, 2016 If cue is a fan of that method, then it works. he is a bit of a legend 1 Share this post Link to post Share on other sites
theuserformallyknownasd00d Posted July 21, 2016 The oven..!! Holy shit never thought of that for poo/straw... Thanks cue! Share this post Link to post Share on other sites
Amazonian Posted July 21, 2016 I'm a fan of oven bags for pasturisation hey. Share this post Link to post Share on other sites
soma_seeker Posted July 21, 2016 Oven bags in the oven, pot on the stove, or in an esky with heated water? 1 Share this post Link to post Share on other sites
theuserformallyknownasd00d Posted July 21, 2016 This thread just saved ya some $ hey man!? 2 Share this post Link to post Share on other sites
Amazonian Posted July 21, 2016 1 hour ago, soma_seeker said: Oven bags in the oven, pot on the stove, or in an esky with heated water? ^ All of those methods 1 Share this post Link to post Share on other sites
Cue Posted July 22, 2016 (edited) On 7/21/2016 at 9:18 PM, waterboy 2.0 said: the Mrs would KILL me Cue I told my Mrs. "It will be pasteurized, so you could even eat it if you wanted to". Now as a disclaimer I use composted bagged cow manure in my substrate that only smells like dirt. So, you probably want to make sure if you use manure that it is well composted. On 7/21/2016 at 8:12 PM, soma_seeker said: A good friend of mine did his PhD at Penn State. The thing about our state of Pennsylvania is that there mushroom farming is a big business. They have many abandoned coal mines that they use as mushroom farms. On 7/21/2016 at 3:49 AM, El Presidente Hillbillios said: If cue is a fan of that method, then it works. he is a bit of a legend There is a private site filled experienced growers, and there I am humbled. It was there where we started viewing the substrate as entire ecosystem, and encourage the grow of symbiotic microbes. Now when talking about bacteria I always specify whether the bacteria is aerobic or anaerobic. I hope that I'm getting off topic here, and maybe I should start a thread just about this, but aerobic bacteria is important for the nitrogen cycle. https://en.wikipedia.org/wiki/Nitrogen_cycle Edited July 22, 2016 by Cue 2 Share this post Link to post Share on other sites
waterboy 2.0 Posted July 22, 2016 I've done too much "bad stuff" in the kitchen...LOL....and I've been blackbanned. It is simply pure genius though....and I'm seriously thinking about finding one that someone is parting with after a reno for the man cave (workshop). I reckon that topic could stimulate some serious thought Cue 2 Share this post Link to post Share on other sites
Cue Posted July 30, 2016 (edited) I'm considering purchasing one of these. This a pic of 4' proofing hot box, but they also come in 6'. I've seen used 6' (2 meters) ones for $500.00USD Past temps are from 140F-160F, and these max out at 180F. Edited July 30, 2016 by Cue 2 Share this post Link to post Share on other sites
waterboy 2.0 Posted July 31, 2016 (edited) Thats another great idea....hmmm also gotta have a chat with me baker mate then about equipment becoming surplus Prover would be very mobile and a lot lighter.... Edited July 31, 2016 by waterboy 2.0 Share this post Link to post Share on other sites