SporesandMore
SHORT GUIDE TO MAKING A MUSHROOM WIND TURBINE
INTRODUCTION
I would like to begin with a quote from the book Fungipedia, written by Lawrence Millman.
“How fungi arrived in our world has been a prod to the human imagination. In Lituania, fungi were once considered the fingers of Velnias, the one-eyed Baltic god of the dead, reaching up from the underworld to feed the poor. And in the contemporary inuit in the central canadian artic belive that mushrooms are the anaq (shit) of shooting stars as they often appears on the tundra the morning after a shooting star leaves a trail of detrious across the night sky.”
In our project we are to certain extent reaching for “new imaginaries” in our objective to highlight and contribute to broader discussion and new perspective around resource efficient energy use and practises. On a more conret note and how we partly approach this is by developing alternative energy solutions in the form of small scale prototypes such as mushroom based windturbines and look at how these can be used in regenerative agriculture work of local farming communities.
In our project we introduce a range of what we characterize as regenerative methods and practices Designing with compost-promoting regenerative materials, hybrid combinations of computational tools and biological processes, slow engineering, speculative poetics and a transdisciplinarity situated within the longstanding innvotations and emerging traditions of various agroecological communities.
We among others think that through mycelium (mushrooms own root system) can be a formidable alternative to a regenerative material in constructional applications, so also in windturbines. It hold has the possibility to promote soil health and micro remediation bringing out such as heavy metals from topsoil.
As we now discuss quite often what the future would look like in terms of sustainable energy transition, we find it interesting to pose the question: what if everybody could grow their own energysource?
STERILE ENVIROMENT AND CLEAN WORKING SPACE
It is important to mention that bacterias and molds also like mushrooms or fungi, we want to make sure to reduce the possibility of contaminate our cultivation and out-compete the mushroom culture. Make sure wash your hands and wipe the surface area with any alcohol or hand sanitizer. always wipe all the tools and gear you intend to use as well.
COLLECTING MUSHROOM SAMPLE
There are a number of ways to proceed and this zine should only be seen as a simplified version that is not near a complete guide but rather covers a very basic outline to learn more about growing your own wind turbine.
To start off, you are welcome to collect a spore sample from our “spore tap” but you could sample any fresh or living mushroom (the actual fruitbody of mushroom) and cut it into small pieces. We recommend reshi (you could pick up in the spore tap) as it is a fast growing suitable fungi for making constructional materials.
TRANSFER THE MUSHROOM CULTURE TO STERILIZED GRAIN JAR.
The word mushroom are often refered to a fungus with umbrella-shaped fruiting body, as well as pores and gills beneath the cap. Good to know could be that yeast are not mushrooms, but are aswell fungi. Spores which is refered to aswell here are simply put the reproductive structures of mushrooms. This is how fungi reproduce and spread the fantastic being in through the world. Mushroom spores are esentially microscopic and are usually found on the gills of mushrooms.
The next step is to transfer the liquid culture (from the spore tap or any other mushroom gill sample) into a mason jar or any other similar jar of grain, You can use wheat, brown rice, white rice, wild bird seed and corn. The most commonly used here is arguably rye. However, before you may transfer it, it should really take a number of steps including being sterialised with a pressure cooker.
First is to rinse and clean the grain, soak in water for minimum 12 hours, then cook the grains for 15-20 minutes so that they absorb water. Drain and dry excess moisture from the outside of the grains with a towel. Load grain into mason jars and put to sterilize for 90 minutes at 15 PSI in a pressure cooker. If you dont the PSI, Just make sure to boil to max then lower so it barely lets any steam out and rather go for 120 min instead of 90 min.
When the grain jars have cooled down to room temperature, you could then introduce the liquid culture filled with spores or your other mushroom sample into the grain jar. The mushroom mycelium will start to grow across the grain and eventually taking over the whole jar.
EXPANDING THE GRAIN JAR WITH AGRICULTURAL WASTE AS MAIN MATERIAL
When the mycelium has taken over the jar, it is time to move it all to expand into a bigger bulk of what will be your main turbine material.
We typical use sawdust consisting of softwoods but also sometimes mixed hardwoods from a wood workshop or carpentry nearby. But you could essentially use any mix of agricultural waste typical substrates include straw, saw dust, or compost. Depending on the type of substrate that you use, it will also have to be pasteurized or sterilized prior to inoculation. How much you could expand your grain jar is hard to say, but roughly its good practise to stay between a ratio of 1:5 – 1:10 ratio of grain jar to every agricultural waste you wish to expand. It is also to give it more food and nutrion by adding some wheatflour to the mix, approx around 25g per kg substrate. Make sure to spray some water to keep the whole mix lightly humid. We usually use a plastic storage box, typically made of polypropolyne but there are special growbags with airfilters such as the one in this photo: (photo of growbag) but you could take any plastic bowl and cover it with clingfilm/foodwrap and poke tiny holes in the film every 4-5 cm or so. Remember to sterilise it by wipe it down with some alcohol first.
You will now let is grow and colonise the full box, which would take around 7-10 days if you use reshi.
It should then look something like this (photo 3)
MAKING A MOULD & MIX IN THE SUBSTRATE
You are welcome to use our molds by either, download from our webpage (website link) and 3D-print them yourself if you have access to a 3D-printer or makerspace. Or, you could also borrow a 3D-printed mold here from the library.
You could choose from two different kinds of wind turbine.
The helix variant “the spinny spinny” has a horisontal axis and is more efficient in lower winds on low altitude such on low land on the ground.
The “Finny Finny” has a vertical axis and is more suitble for being located higher up, such as a balcony or tower.
You would now take the bulk of mycelium that you have grown and break it into small pieces. add additional wheatflour approx 25-50 grams per kilo of substrate. This should make the substrate somewhat “sticky” and managble to give it the consistancy to mould it. Spray water or add more wheatflour to achive a “sticky or sculpting” mix. When you have achive the right concistancy, You need to pat the substrate down so it adhears to the mould. If you like, it is also good to wrap the mold in clingfilm/foodwrap, its will aid the process of de-moulding and getting the final part out later.
Place the moulds with substrate in a plastic box so it may hold its humidity and to once more grow its mycelium across the substrate and bind together a wing. This will take roughly 4-7 days. It is then time for the next step.
DE-MOULD AND DRY MYCELIUM WING
The substrate in the mould(s) should be all covered with white mycelium, it is then time to de-mould your part.
Take your mould(s) out from the box and leave them to air-dry approx 5 days-10 days dependent on the thickness. You are then ready to demould you final mycelium piece from the 3D print. If you like, it is possible but not required to strenthen them and make them even more tougher by placing them in the oven lat +/- 40° C with the door a bit open so the moisture can escape for 3-4 hours. then bake off at 80°C for 2 hours.
ASSEMBLE AND ENJOY YOUR CREATIONS
You may download the rest of the 3D printed parts to assemble a “stem” with the myceliym wings.
MAKING ELECTRICITY FROM E-WASTE MOTORS
How it works: If you give electric current to a motor, it will spin. But if you spin the motor, it will give you an electric current due to the electro-magnetic field created between the copper coil and the magnets of the motor. It’s super important to make good use of old motors, like other e-waste, as the mining of these non-renewable raw minerals, as well as the recycling disposal of these components, are hazardous to human and environmental health.
What works the best is to find an AC generator – these you can find in many appliances. We are using motors from an old industrial fridge which was being thrown out by our local grocery store, and work super well! Small DC motors are more common in e-waste, but they generate much less energy and so they may need some other energy harvesting circuitry to use, depending on your application.
You will need to make some kind of adapter for the motor to the turbine, and it’s important that it is really straight and centred, otherwise it wobbles a lot. We have some 3D files online that you can download and modify for fan-type motors (shaft motors coming soon!)
If you use an AC motor you will need to convert the AC (Alternating current) electricity to DC (Direct current) to use with most low-voltage components, such as lights, capacitors, phone chargers, etc. To do this you will need a bridge rectifier, which you can buy as a single component, or make with 4 diodes.
PLEASE SHARE YOUR CREATIONS WITH US
We would so, so much love it you would like to share your wind turbine creations, related stories and photos and the struggles of “slow enginnering”. Email us at: team@regenerative-energy-communities.org