What’s the Best Way to Brew Aerobic Compost Tea on a Small Scale?

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This Q&A is pulled from a collection of questions posed to me by students of my Online Permaculture Design Course (PDC). Learn more with my free four-part Masterclass series, here:
www.discoverpermaculture.com/...
Question:
What is the best way to brew aerobic compost tea on a small scale? I'm thinking between 5 and 10 gallons might be better than a whole IBC or barrel. How would you approach this inexpensively for the smallholder?
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Permaculture integrates land, resources, people and the environment through mutually beneficial synergies - imitating the no waste, closed-loop systems seen in diverse natural systems. Permaculture applies holistic solutions that are applicable in rural and urban contexts and at any scale. It is a multidisciplinary toolbox including agriculture, water harvesting and hydrology, energy, natural building, forestry, waste management, animal systems, aquaculture, appropriate technology, economics, and community development.
#permaculture #soils #composttea

Опубликовано:

6 фев 2020

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Комментарии : 31

@stefanomoretti3664 3 года назад

Great video as usual, but - for once - dearest Geoff Lawton allow me to be doubtful and express my doubt here. As a biologist dealing with water environment, I know that it is quite difficult to have over-saturated levels of oxygen in water environments. When it happens, it is often the result of abnormal algal growth and it happens only in daylight when photosynthesis allows. Furthermore, it is not only the amount of air that you pump in a given water volume that matters, but the amount of exchange surface is what matters. More bubbles, more surface to exchange, more oxygen flows from air to water. All this said, I'm pretty sure that you can get to full oxygen saturation in a 20 litre bucket ( 5 gallons) with an aquarium air pump and 2 air bubble stones at perhaps 20 US dollars and 3-4 watts energy input.

@slurpyterpy447 2 года назад

I run 400LPH 5 watt aquarium air pumps for 5L in a 30cm diameter bucket, next day I have a nice fat layer of foam on top and plants love it as long as I don't add too much definitely for the small plants only like 50ml, plants in 20L pots I give 500ml when they are well established.

@Raj-yy7xx Год назад

Compost tea is to rapidly rear large quantities of beneficial microbes in 24 hours so the quality of "Aerobic" compost to start is key. The water is just a carrier of propagated microbes from the compost feeding them oxygen and miniscule amounts of food like a oin h of kelp to encourage fungi and less so bacteria. It's important the brewer is cleanable as you want minimal to no anaerobic sludge which are the harmful bacteria. Bubble stones should not be used as they harbour anaerobic bacteria in such a highly active environment. The more oxygen and surface boiling motion of water the better and less likely your tea will remain aerobic and not fall anaerobic. Then immediately sprayed on foliage or to roots.

@jhhggygghchdlfyggxzgdltfugc Год назад

I suspect the contact surface area matters far more than the actual volume of air fed through. One litre of 0.001mm bubbles should have many thousands of times the surface area of one litre of 1mm bubbles. I think as long as the bubbles are bouyant enough to rise to the surface and provide some stirring, keep aiming for smaller bubbles. Seems like a hydroponics or aquaculture diffuser made of porous material would be more efficient, assuming it doesn't just clog up.

@PseudoAccurate Год назад

The compost tea is full of microbe food and organisms. Very high biological oxygen demand, it goes anaerobic very quickly.

@raczyk 3 года назад

Thank you.. very helpful... especially stating you need at the volume of air a minute as the size of the bucket you are brewing you tea in.

@imalamboman12 4 года назад

Just bought one of these Resun GF180 pumps, very keen to start brewing compost teas. Thanks Geoff

@saucywench9122 4 года назад

Maximum aeration, awesome design, thanks for this.

@EnergetikSo4i 4 года назад

Здравствуйте Джефф! У вас очень хорошо получается снимать различные пермакультурные хозяйства по всему миру! Благодаря им я познакомился с пермакультурой! Это и есть мощный рычаг распространения ваших идей! И хочется увидеть как вы озелените новый участок какой нибудь пустыни! )))

@Not_So_Weird_in_Austin 7 месяцев назад

Thanks for the technique I am in Austin Texas metro looking for a 5 gallon aerator for a back yard vegetable and ornamental garden

@shamanking5195 3 года назад

Hi Geoff can we use a nano bubble diffuser to do the same ??? has anybody tried it ???

@googleaccount3555 4 года назад

what I don't really understand is that the fluid that leaches out of the wormbin is anaerobic, is it just this simple that the oxygen favours the condition for aerobic bacteria over the anearobic bacteria this way?

@vasiliostza8470 4 года назад

Does the compost tea better results to the fruit trees than the compost?

@raczyk 3 года назад

Is the small the whole drilled into the hard plastic the better?

@strudelheiman3030 2 года назад

If it smells like a septic tank, probably shouldn’t use it right? 🤦‍♂️

@kathynix6552 3 месяца назад

Mine smelt a little like yoghurt

@ricos1497 4 года назад

For those like me who deal in metric, 1/16in is more like 1.5mm than 2-3mm. If you drill 3mm holes, they'd likely be too big!

@raczyk 3 года назад

Is the smaller the whole the better for oxyginating the water?

@ricos1497 3 года назад

@@raczyk I'm guessing that the pump would work better with smaller holes, but I haven't actually tried it myself, I only mentioned it incase someone drilled holes too big, but a bit of trial and error is probably the best option. Start with 1.5mm and test upwards in size from there.

@pamcreations 9 месяцев назад

Is it possible to turn unaerobic liquid fertiliser to aerobic? I made a brew of 120L (mixture of water + weeds + garden greens) & left it for 2 weeks without stirring up... I recently learnt that air has to be introduced in.

@kathynix6552 3 месяца назад

I’ve never heard of air being introduced into weed tea. Please tell me more 😊

@pamcreations 3 месяца назад

@kathynix6552 introduction of air (oxygen) into the mixture promotes aerobic decomposition meaning that beneficial microbes can thrive and breakdown the organic matter more efficiently..

@jstoecker62 Год назад

Gday , how does the average gardener at home quantify that there is fact an increase in beneficial microbiology activity occurring in the finished brew? What simple test could show me the difference that has occurred from the starting point of aeration of brew to the end

@alexesdohr6485 Год назад

Using a microscope before and after.

@alexesdohr6485 Год назад

See the work of dr Elaine Ingham. She has studied the many ways of compost tea brewing and measured to find the optimum levels of food/ oxygen/temperature etc to multiply beneficial organisms. If done correctly , it works. There are a lot of variables tho so the home gardener just has to take a punt I think.

@jstoecker62 Год назад

@@alexesdohr6485 Yes I have watched a few of her videos , and to quote her words don’t just trust what you are being told but check it for yourself under a microscope- what my question was is there any other way to quantify the brew tea process- heaps of videos of this subject but I have seen no way of testing the brew

@AlmaTlust 7 месяцев назад

Doesn't work without electricity, so isn't applicable to billions of poor small scale farmers in rural areas where there is no electricity. I would LOVE to know an alternative way for those people!

@kathynix6552 3 месяца назад

You can pour it from one bucket to another several times a day🤷