How many plants do you need to breathe? TESTED
Summary
TLDRDans cette expérience audacieuse, l'animateur s'isole dans une pièce étanche simulant un vaisseau spatial, confronté à la faillite du soutien vital. Sa quête pour survivre repose sur la capacité des plantes à recycler le dioxyde de carbone en oxygène. D'abord avec des plantes ordinaires, puis en utilisant des algues dans un photo-bioreacteur, il cherche à prolonger la vie dans cet espace confiné. Après de multiples essais, il parvient à stabiliser les niveaux de CO2 grâce à un système d'algues massif, tout en cherchant à établir une équilibre pour une respiration durable.
Takeaways
- 🚀 L'expérience vise à déterminer si les plantes peuvent transformer suffisamment le dioxyde de carbone en oxygène pour maintenir la vie dans une pièce scellée.
- 🌿 La plante-serpent est censée être efficace pour produire de l'oxygène, mais l'expérience met en doute la suffisance de seulement six à huit d'entre elles pour survivre.
- 💭 L'idée de survie en utilisant des plantes dans une chambre scellée a été inspirée par le film 'Mission to Mars' et la situation de Don Cheadle.
- 🌍 La Terre est recouverte de plantes qui traitent l'air pour 8 milliards de personnes, mais la question est de savoir si un nombre suffisant de plantes pourrait le faire pour une personne seule.
- 🔬 L'expérience consiste à créer une chambre étanche et à mesurer le taux d'augmentation du CO2, d'abord sans plantes, puis avec différentes quantités de plantes.
- 🏠 L'expérience a été menée dans une 'salle d'espace' improvisée dans un sous-sol, en utilisant des matériaux de construction de film de science-fiction.
- 🌳 Les résultats des tests avec les plantes-serpents indiquaient une réduction minimale de la concentration de CO2, suggérant que davantage de plantes seraient nécessaires.
- 🍃 L'expérience a ensuite utilisé de l'algue, une forme de plante aquatique, qui a montré un potentiel plus élevé pour produire de l'oxygène en raison de sa croissance rapide et de sa reproduction.
- 💡 L'utilisation d'un photo-bioreacteur, un système qui utilise la lumière pour favoriser la croissance et la production d'oxygène par les algues, a été testée avec succès.
- 🔍 Les tests ont montré que l'augmentation de la concentration de CO2 ralentissait progressivement avec l'augmentation de la quantité d'algue, indiquant une meilleure efficacité à grande échelle.
- 🔄 L'expérience a abouti à une stabilité des niveaux de CO2 grâce à l'utilisation d'une grande quantité d'algue, bien que la stabilité ait été précaire et que la concentration ait légèrement augmenté avec le temps.
Q & A
Le scénario présenté dans le script est-il basé sur une situation réelle ou fictive ?
-Le scénario est fictif, bien que l'expérience décrite dans le script soit basée sur des concepts scientifiques réels concernant la production d'oxygène par les plantes et les algues.
Quel est le but principal de l'expérience décrite dans le script ?
-Le but principal de l'expérience est de déterminer si les plantes peuvent suffire à maintenir un niveau d'oxygène respirable dans une pièce scellée, en transformant le dioxyde de carbone en oxygène.
Quelle plante a été mentionnée dans le script comme étant efficace pour produire de l'oxygène dans une pièce scellée ?
-Le script mentionne le 'snake plant' (dracaena) comme une plante efficace pour produire de l'oxygène dans une pièce scellée.
Combien de temps le narrateur a-t-il passé dans la pièce scellée sans plantes pour établir une base de référence ?
-Le narrateur a passé environ 30 minutes dans la pièce scellée sans plantes pour établir une base de référence.
Quel est le niveau de CO2 considéré comme sûr dans l'air extérieur ?
-Le niveau de CO2 considéré comme sûr dans l'air extérieur est d'environ 400 parties par million (ppm).
Quel est le niveau de CO2 dangereux pour la santé humaine ?
-Les niveaux de CO2 supérieurs à 5 000 ppm sont considérés comme dangereux pour la santé humaine, car ils peuvent entraîner des symptômes tels que des maux de tête, de la fatigue, une perte de concentration et une augmentation de la fréquence cardiaque.
Quelle est la différence entre les plantes terrestres et les algues dans la production d'oxygène ?
-Les algues, comme la chlorelle vulgaris mentionnée dans le script, sont des organismes à cellules simples qui se reproduisent rapidement, capables de produire de l'oxygène plus efficacement et plus rapidement que les plantes terrestres à structure complexe.
Quel est le nom scientifique de l'appareil utilisé pour cultiver les algues et produire de l'oxygène ?
-L'appareil utilisé pour cultiver les algues et produire de l'oxygène est appelé un photo-bioreacteur.
Quelle a été la durée la plus longue que le narrateur a réussi à rester dans la pièce scellée avec les algues sans atteindre un niveau de CO2 dangereux ?
-Avec les algues, le narrateur a réussi à rester dans la pièce scellée pendant 55 minutes avant d'atteindre 2 000 ppm de CO2.
Quel était le but de l'expérience finale décrite dans le script ?
-Le but de l'expérience finale était de vérifier si le niveau de CO2 pourrait rester stable ou diminuer avec un grand volume d'algues, en dépassant intentionnellement le niveau de CO2 et en observant les changements随后。
Outlines
🚀 Survivre dans un espace simulé avec des plantes
Le script décrit une expérience de survie simulée dans un espace où le système de soutien vital a échoué. L'idée est de tester si des plantes peuvent transformer le dioxyde de carbone (CO2) en oxygène. L'expérience est inspirée par un post sur les réseaux sociaux affirmant que six à huit serpents d'Alger suffiraient pour survivre dans une pièce scellée. L'expérience va être menée dans une 'basement' transformé en espace pour évaluer si la théorie est vraie et déterminer combien de plantes sont nécessaires pour maintenir un niveau d'oxygène viable.
🌿 Test des plantes serpents pour la production d'oxygène
Dans ce paragraphe, l'expérience commence avec l'achat de plantes serpents d'Alger et la mise en place d'un test scientifique dans une pièce scellée. L'objectif est de vérifier la validité de l'affirmation selon laquelle six à huit de ces plantes sont suffisantes pour survivre sans ventilation. Les résultats montrent que même avec six plantes, le niveau de CO2 augmente rapidement, ce qui indique que le nombre de plantes est insuffisant pour maintenir une qualité d'air viable.
🔬 Échec des plantes serpents et introduction d'une alternative
Après avoir constaté que les plantes serpents d'Alger ne sont pas suffisantes pour réduire significativement les niveaux de CO2, le script introduit une alternative : l'algue Chlorella vulgaris. Cette algue est capable de produire de l'oxygène beaucoup plus rapidement et efficacement que les plantes terrestres, ce qui la rend potentiellement plus utile pour la survie dans un environnement scellé.
🌱 Développement d'un photo-bioreacteur avec de l'algue
Le script détaille le développement d'un photo-bioreacteur, un système qui utilise de l'algue pour convertir du CO2 en oxygène. L'expérience montre que même avec un photo-bioreacteur à petite échelle, les résultats sont décevants, avec une augmentation continue de CO2. L'auteur envisage d'augmenter la taille et la capacité du photo-bioreacteur pour améliorer les résultats.
🛠️ Amélioration du système de photo-bioreacteur avec plus d'algue
Dans ce paragraphe, l'auteur élargit considérablement la taille de son photo-bioreacteur en utilisant des barils de 55 gallons et en améliorant l'éclairage pour une meilleure production d'oxygène par l'algue. Les tests montrent une réduction de l'augmentation de CO2, indiquant que le système est plus efficace que les plantes terrestres.
🔭 Tests intensifs avec un photo-bioreacteur à grande échelle
L'auteur décrit des tests plus poussés avec un photo-bioreacteur à grande échelle, qui inclut l'utilisation d'un CO2 supplémentaire pour accélérer le processus. Les résultats montrent une stabilité des niveaux de CO2, ce qui suggère que le système de photo-bioreacteur peut potentiellement maintenir un équilibre entre la production d'oxygène et la production de CO2.
🏁 Vers la stabilité des niveaux de CO2 et d'oxygène
Le script conclut avec l'auteur qui envisage de passer une journée entière dans la pièce scellée pour tester la stabilité du système sur une longue période. Il reconnaît que, bien que les niveaux de CO2 semblent stables, il n'a pas encore mesuré les niveaux d'oxygène et qu'il faudra peut-être augmenter la taille du système pour assurer une survie durable.
Mindmap
Keywords
💡espace
💡oxygène
💡dioxyde de carbone
💡plantes
💡photosynthèse
💡réacteur photobiologique
💡chlorella vulgaris
💡tests
💡équilibre gazeux
💡hypoxie
💡aéroculture
Highlights
L'idée d'un test de survie dans une pièce scellée avec des plantes pour recycler l'oxygène à partir de dioxyde de carbone (CO2).
L'influence du film 'Mission to Mars' qui a suscité l'intérêt pour la question de la production d'oxygène à partir de plantes.
Le défi de déterminer le nombre de plantes nécessaires pour maintenir un niveau d'oxygène viable dans une pièce scellée.
L'idée de créer un espace similaire à l'espace dans une cave pour mener les tests.
La construction d'un compartiment étanche à l'aide de panneaux de construction et de ruban adhésif Gorilla Tape.
L'utilisation de plantes de serpent pour tester la théorie d'une production d'oxygène suffisante en une pièce scellée.
L'évaluation de la validité d'une affirmation de médias sociaux sur la capacité des plantes de serpent à produire de l'oxygène.
L'observation que même avec un nombre élevé de plantes de serpent, la concentration de CO2 ne diminue pas significativement.
La découverte que les plantes terrestres nécessitent beaucoup de surface pour produire de l'oxygène efficacement.
Le recours à l'algue Chlorella vulgaris comme une alternative plus efficace pour la production d'oxygène.
La conception et la construction d'un photo-bioreacteur pour cultiver l'algue et produire de l'oxygène.
L'expérimentation avec différents volumes d'algue pour voir l'effet sur la concentration de CO2.
L'amélioration continue du système de photo-bioreacteur pour augmenter la production d'oxygène.
La réalisation que la production d'oxygène par les algues peut être suffisante pour prolonger la durée de survie dans une pièce scellée.
L'ajout de pompes d'air supplémentaires et de réacteurs d'algue pour maximiser l'efficacité de la production d'oxygène.
L'observation que la concentration de CO2 peut rester stable avec un certain équilibre entre production d'oxygène et consommation de CO2.
La nécessité de mesurer les niveaux d'oxygène pour valider la théorie de la production d'oxygène par les algues.
La préparation d'un test final consistant à passer une journée entière dans la pièce scellée avec les réacteurs d'algue.
Transcripts
picture this you're trapped inside of a
spaceship and life support has failed in
just a few minutes you're going to run
out of air obviously you can't open the
door so you open your emergency Air
Supply instead but you're only delaying
the inevitable if only there was a way
to transform your toxic carbon dioxide
breath back into lifegiving oxygen then
you hear
it plants is it really that simple
though the Earth is covered with plants
and they process the air for 8 billion
people but for just one person in a
sealed room how many plants would they
need that's what I'm going to find out
and even though our story ends in
pretend space it All Began on the real
toilet scrolling through social media I
Came Upon a post that said the snake
plant is so effective at producing
oxygen that if you were in a sealed room
with no air flow you would only need six
to eight of them to survive and that's
according to n
now I've personally thought about this
problem ever since I saw Mission to Mars
back in the year 2000 when I was 10 you
see space hipster Don cheel was getting
stranded on Mars way before Matt Damon
ever made it cool and the only reason
Don was able to survive was because it
works you know I I give them CO2 and
light and they give me oxygen and food
but even though this scenario has been
randomly popping into my head for the
last 25 years for most other people the
conversation went like this have you
ever wondered how many PL that you would
need to
breathe no so if you're wondering why
you should care about this question
let's get some perspective people can
survive some truly harsh places Siberia
the
Sahara Cleveland but all of those places
have actual breathable air we take for
granted that right now we can breathe
everywhere we go on Earth but last I
checked we haven't discovered any plants
in space not to mention we have cut down
quite a few of them here who knows in
the future knowing the number of plants
that you need to survive could become
something that you reference every day
leaving the house wallet keys phone
plants but do you need a green house or
just a green backpack could scuba divers
carry a succulent should astronauts just
sniff a ficus it's a fascinating
question and I can't wait to find out
but we can't go to outer space to do it
so we're just going to have to bring
outer space to my inner basement now
there weren't any used space capsules
for sale on Market place so I'm going to
make my own and all we really need to do
is create an airtight box one that we
can open and close with just enough room
for me and some plants but not so much
room that it takes forever to run out of
air once inside I'll just breathe and as
my breath turns oxygen into carbon
dioxide I will monitor that CO2 level
and use a stopwatch to time how long it
takes to reach an unsafe level then I'll
do the same thing but with different
amounts of plants and compare the times
my first objective is to see if this
post about the snake plants is true or
false but either way my final objective
is to find a way to stay in that room
and never run out of air using just
plants so I guess I better build it and
this is where things get pretty cool and
really convenient you see a few years
ago I built a science fiction movie set
out of fular board and for some reason
I've kept it in storage all this time so
not only do I not need to buy these now
much more expensive material
but I also don't need to paint them
because they already look like an old
spaceship we'll tape up the seams we'll
fill that stupid Gap we'll get the TV
screen there I'm building a real
spaceship I mean it's not real but it's
it's real for our purposes I'm going to
be able to seal this thing up and then
I'm going to be able to time how long
does it take to saturate it with carbon
dioxide and then when we have plants in
here how much of an effect will it
actually have this is really exciting
oh I like it I like it a lot so my
brother who has built actual houses
seemed to kind of approve of the concept
and with a massive TV that I repaired a
while back I now had a window into space
but this airtight room needs to be
airtight meaning every little Gap and
crack needs to be covered and that's
where the Gorilla Tape comes in the only
way this works is if we seal up every
crack this thing has to be at least
99% I have a feeling I'm going to go
through a lot of tape now in the places
that needed to stay clear I used heat
shrinking window we weatherproofing
plastic that includes the light fixtures
in the walls my pretend window and my
actual window SL emergency exit I think
I'm just going to go ahead and seal up
the rest of it and we'll see how long it
takes to become a truly toxic work
environment the Final Touch is a
resealable door that has to be taped
shut each time and as a quick test I
decided to fill the room with fog and
then look for fog leaking on the outside
not seeing any leaking out oh damn
that's fancy and after a bit of ing
around it was finally time for us to
establish a
baseline good thing the smoke alarms
work all right bro you ready for test
one test one I've got my stopwatch I got
my pul socks I got my emergency uh stop
button which is this so yeah a baseline
test basically means just sitting and
waiting under the watchful eye of my
brother Charles you going to keep me
alive it's day one we're on the surface
of Mars and I am waiting for my imminent
Doom we're going to wait till we get to
about 5,000 parts per million of CO2 and
then I think I'm going to call it quits
this test will tell us how long I can
stay in the room with no plants and
somewhat limited Avenues of
entertainment and the barrel is just a
physical placeholder so that when we
bring the plants in we'll still be
starting with a similar volume of air
and as CO2 level steadily Rose I found
myself waxing eloquent optimism is the
lifeblood of a spacecraft without
optimism you would
die and O oxygen is also important now
what do these numbers actually mean well
the air outside usually sits at around
400 parts per million that means that
for every million bits of air 400 of
them are CO2 or about
.4% to contrast the air that you breathe
out sits at around 38,000 parts per
million now above 2,000 parts per
million is where things start to get
really spicy these levels are associated
with headaches fatigue loss of Focus
nausea increased heart rate and they're
often an indicator that there's less
oxygen in your home because you're
probably just breathing the same exhale
breath over and over again now OSHA's
personal exposure limit is 5,000 parts
per million anything above that and
you're basically just slowly dying but
back up on Mars it was taking a long
time to actually get to 5,000 then I
realized yeah why do I need to go to
5,000 I could just go to 2,000 right you
see I really just needed something to
aim at this was taking longer than I
thought and conveniently I was about to
hit 2,000 right at 30
minutes smells like wrong dog in here
all right I'm going to eat lunch say the
word so where do you get a bunch of
snake plants well your local orange Home
Improvement store has them for about 25
bucks each but that would be $200 for
eight what if I need more but what am I
going to do it's not like I'm going to
just stumble upon a bunch of cheap snake
plants from some random dude on
Marketplace
[Music]
so the random dude on Marketplace was
named Charles and after showing me his
home ecosystem and after paying him a
mere $70 I now had a lot of snake plants
and since the social media post says as
few as six snake plants that's what I
decided to start with the bare minimum
bro you ready for this very scientific
test lock you in a box there we got a
bunch of plants going on lights going on
a box it's got a window cut into the box
yes well it's it's a very scientific box
so the post said 6 to8 snake plants in a
sealed room I figured it would make
sense to test the minimum six right
because any random person reading that
is going to go huh why' you put six
snake plants in a room I'll be fine all
right door's closed starting timer we
are starting with a base reading of 836
parts per million well last time I was
at 670 but we've got we've got six snake
plants there's no that these snake
plants won't be able to offset that
extra amount the the post said this
would work and of course we all know the
post never lies test number two almost
15 minutes CO2 M freaking out I forgot
to turn off the alarm there we go if
it's not beeping it's not a problem so
the first test started at 670 and then
hit 2,000 parts per million at 30
minutes giving us a CO2 saturation rate
of 44.4 parts per million per minute or
ppmm which is why it was surprising that
even with the six plants CO2 was still
climbing pretty darn quick I just
thought of like a question that I didn't
really
ask what do I do if I have to poop we're
at 30 minutes and we're at
2120 pretty much a wash from the first
test six snake
plants you're going to die that's right
our PPM PM went from 44.4 to 42.8
meaning at most we had like 4% reduction
in CO2 but I'm willing to bet that our
margin of error is at least 5% so best
to get more green give it another try
side note I am going to be at Open sauce
the weekend of June 14th a place where
all your wildest dreams come true in so
much as they conform to their scheduled
offerings but I am seriously excited and
you should definitely check out the
website and get some tickets I'd love to
see you there and I even have one ticket
to give away so leave me a comment let
me know what funny thing would you say
if you saw me in the crowd and maybe
you'll get a chance to say it for real
what are your predictions I don't think
that 12 snake plants would be
like enough you saw the post it said 6
to eight snake plants and yet somehow
with now 12 snake plants double the
minimum and 50% more than their claimed
Max our CO2 saturation rate looked
eerily familiar it's full of snake
plants how can it still be basically the
same rate we know that there's going to
be little variances here and there my
metabolic rate in the actual volume of
stuff taking up plate space in the room
right but the point is that like if
these things would make you live
according to that post with six well
then double that should easily easily
make up for any variances or at the very
least make a dent and I could fit like
you know maybe six more snake plants but
we already know that adding another 30%
of no appreciable difference is is 30%
of nothing and think about it this is
like who has this many house plants and
it's not even enough to make a
measurable difference in your own CO2
output isn't that crazy a person with
what most would consider a lot of house
plants isn't even making the dent we're
going to have to seriously re-evaluate
just what I'm doing here because I want
to be trapped in this room with plants
and I want them to keep me alive but
they're letting me down that post let me
down this is not looking good so what do
you do when regular Plants just aren't
going to cut it well here's where I may
have misled you just a little bit not
about plants we're still going to do
this with plants but I kind of already
knew that snake plants weren't going to
be enough you see I try and do a little
research before I do a project and I
quickly found that you need like a lot
of plants to make this work which is why
in the background I've secretly been
preparing a plan B that fits neatly into
this little vial chlorella vulgaris a
plant that we've actually already
started experimenting with in space to
the average person this is just algae
the green goo that grows in water it's
still a plant but with some very very
special attributes you see land plants
like the snake plant have a variety of
complex structures leaves roots stems
and on the resource balance sheet
specialized Parts just require more cost
and means they take longer to grow and
they only really produce oxygen when
they're growing algae like chlorella
they're just like cells they're like the
bacteria version of plants just
reproducing over and over again meaning
they can produce way more oxygen way
quicker and with way less space but not
everyone was impressed by the idea or at
least not impressed by my first small
growing
chamber you're just like blowing bubbles
into a piss bottle when I came down here
I was expecting to see like multiple
fish tanks but there's just this one
little bucket with a fish bottle in it
that's all you have
yes you're going to be you're going to
die it's not even green it's just like
that's after like a week of growth yes
one week gave me this yellowed bottle
and then I transferred that bottle to an
even bigger bottle and after another
week that bottle had turned into this
bottle that is green which quickly
became these bottles and were
transferred to these
bottles satisfying isn't
[Applause]
it these five 2 L bottles in a 5G bucket
were my first prototype for a portable
photo bioreactor now what is a photo
bioreactor well it's a fancy word for
something really simple photo refers to
light bio refers to life and reactor
while the life reacts to the light to
convert CO2 to oxygen as it grows and we
maximize the CO2 that the life is
exposed to by pumping air into the
bottoms of the bottles but just how
powerful is this little glowing bucket
well there is a consumer product called
the Arium which is basically a photo
bioreactor marketed to the average Joe
with a tank that appears to be around
the size of one 2 L bottle they say that
their reactor has the power of 25 plants
and that's using less efficient
spirulina algae so under optimal
conditions this little bucket could
theoretically be more effective than
125 plants but will that be enough it's
time to go back to space and find out
close me in brother all right the door
is closed test number four our number
one algae test running the algae
generator 1000 this is Uncharted
Territory for me but I'm excited I got
algae in a bucket Mission Log day four I
can either look out this lovely window
right here or I can look out this one
guess this window right here is quite
lovely all jokes aside and as I slowly
dissociated beyond the surface of Mars I
reflected on just how far I had come
that is until I noticed a malfunction
one of my pumps ain't pumping we're only
operating at 80% for this first test
that's just the way it's going to be not
a big deal um you know that we're doing
multiple tests but even with our 80% or
100 plant power the CO2 still steadily
Rose in a surprisingly familiar fashion
we're approaching 2,000 parts per
million and we're approaching 30
minutes dang
it yesterday we tested with just four of
the tanks bubbling didn't really notice
a difference I thought wow this reactor
should really be like multiple times
stronger than the plants well this time
I've taken the a
little
um that so back before I multiplied my
first 2 L bottle I began growing a
separate batch using 4 gallon bottles
this was a bit of an experiment since my
2 L bottles started with completely pure
distilled water and these would use the
regular bottled water that they came
with from the store I did aate them
ahead of time to try and ensure that any
potential chlorine or chloramine was
fully evaporated and then I meticulously
prepped the water with baking soda
minerals and plant food the same thing I
had done with all the algae water up to
this point I then evenly distributed the
algae and kept this batch running in the
background in case something happened to
the primary batch or just in case I
needed more and it was pretty clear by
test 5 that I needed more here are our
five 4G tanks got a lot of light light
shining right now got a little fan
helping to circulate that I got a fan
here helping to circulate little fan
here pulling air through these holes
even though yesterday the small photo
bioreactor was only running at 80%
capacity it still didn't show anything
so I didn't want to do a test right just
ran it at 100% capacity just to show
that it still didn't really do anything
appreciable so that's why right now
we're running both systems if this ends
up being more than enough then I'll just
back it off and find out exactly how
much I need but it quickly became clear
that backing off wouldn't be our problem
seems like we're on track to have about
the same result I just want to get to a
point where at the very least there's a
measurable amount like instead of being
only a half an hour in this room before
reaching 2,000 it's 40 minutes that
would blow my mind and of course this
isn't a laboratory I mean I'm a guy in
my basement but I want to demonstrate
that it's possible that it's doable and
just about how much that would
take okay I think something might be
happening everything seemed on track but
now we're at 27 1/2 minutes and we're
only at
1730 no I mean the plants run on co2 so
as the CO2 concentration increases in
the room maybe they become more
efficient they start growing faster I
ended that test with
41.6 PPM PM the lowest ever and when I
ran the same test again the next day 30
minutes and we're at 1805 that's pretty
good I'll check in when we hit 2,000 all
right 2,000 at 35 minutes and 50 seconds
we were definitely in a downward Trend
and this test had averaged an even lower
39.1 PPM PM but these results could
still possibly be within my margin of
error how could I possibly know without
doing way more tests or growing way more
algae so remember when I said that I had
the second system growing in the
background well it wasn't the only other
system that I had growing okay so in my
reading I saw that the Russians had done
something similar to this in the 1970s
and it required like a lot of algae so I
decided to grow a lot of algae and to
try and be smart about it giant clear
containers aren't easy to find or cheap
but these 55g food grade barrels were
less than $10 each yeah that actually
just smells like a like a light kombucha
yeah exactly now algae needs a lot of
light distributed as evenly as possible
but these opaque sides rule out an
external light source and the only
immersive algae light that I could find
was
$22,000 so I decided to design my own
with some Amazon grow lights clear heat
shrink and hot glue the materials for
two of these cost me only 5% of that 2
Grand and with the addition of some
tubing and aquarium air rating stones to
produce fine bubbles they could now
slide down the middle of the tank and
shine out in all directions through the
well aerated algae even though these
lights are quite bright it didn't take
long for the algae to make them much
darker the light is barely getting
through now or for them to really start
scrubbing out the CO2 I did it I now
have 100 Gall of algae tomorrow I'm
going to try and breathe using just this
algae and the algae that's already you
know in the room all right we are at
test number seven I think this is a very
special test now we have 100 4 gallons
of algae it's crazy I'm so excited for
this one because this is the one where
something's going to happen and I have
this tube my breath is the most
dangerous thing in this room because it
has the highest concentration of carbon
dioxide so this tube is connected to the
intake of the air pumps that way it runs
my breath directly through the algae
giving them more food and scrubbing out
as much CO2 as possible right away we
got the beeping going cuz we just
crossed into 1,500 territory 1,500 we at
almost 24 minutes I think we're doing
really well and now for the first time
in this whole process I was surprised in
a good way wa no way no way it's only
gone up 75 parts per million in the last
6 minutes how is that possible 30
minutes and we're at
1588 I'm just going to sit here puffing
on this for a while the CO2 increase
kept slowing down the higher it got
maybe because the algae was getting more
efficient or maybe because we were
approaching equilibrium but either way I
wasn't complaining okay we are at 39
minutes and we're at 1760 the CO2 is
crawling it's that 99 we're at 99 I'm
not feeling like headit or anything I'm
feeling perfectly normal 1,800 we just
reached 1,800 parts per million and now
we're at 43 minutes and just like that
the 40-minute Milestone was in the rear
view mirror can't believe I've made it
this far like 2 months ago I was like I
should probably start growing algae and
while I was looking in that rear view
mirror I found myself reflecting know
I've had a lot of projects lately like
my rubber band car that only went you
know like not even 5 m hour I'm not
going to complain and say it's hard like
obviously it's hard it's a it's a ton of
work but I'm glad I did this one you
know a part of me wonders I don't know
if this video will do well it's kind of
I think it's really cool I think it's
really cool
[Music]
he said as he breathed into a
tube with our over 100 gallons of algae
it took us 55 minutes to reach 2,000
parts per million for an insane average
PPM PM of
24.5 and I had a plan to do even better
I'm going to get more air pumps we're
going to let the algae keep growing I'm
going to do this again tomorrow I don't
even why am I still breathing into this
tube I don't just got another pump more
tubing in aquarium stones I'm super
excited we're going to double the air
flow through it certainly there was no
way we were maximizing the surface area
of that algae this could make all the
difference this could be the final brick
in the foundation of being able to
breathe in space or in this sealed space
in my basement I'm excited test number
eight got the two air pumps I've got
them both hooked up to this funnel
that's a weird feeling when this sucks
to your
face ow we're at 15 minutes and we're at
110 parts per million I don't know it's
so nonlinear not even worth really
speculating meaning like always we
probably wouldn't see a big difference
until the levels got higher this thing
keeps sucking to my face I just realized
that as I get closer and closer to the
Finish Line I'm going to have to spend a
lot more time in this room you see as a
differential approaches equilibrium it
slows down big gap big movement small
Gap small movement so finding the level
where the CO2 who actually stops going
up could take a long time I'm the one
who devised this whole premise in these
experiments it's my decision it's still
a long time to sit in a room with a
funnel on your face but I had never been
this close to Victory and patiently
passed the minutes to get there 30
minutes 1363 but since I was only
measuring CO2 and not the oxygen in the
air I thought it would be a good idea to
do a little research let's read the
symptoms of hypoxia restlessness
headache confusion anxiety rapid heart
rate rapid breathing difficulty
breathing or shortness of breath so if I
get a headache while I'm in here if I
start having anxiety while I'm in here a
rapid heart rate I'm going to pull the
plug difficulty breathing definitely
pulling the plug confusion I mean I'm
always a bit confused so in good health
I pushed forward and man were we going
forward we're just about to cross the
60-minute line 1700 parts per million
going very slowly but it's not stopping
I wish it was sto we're approaching 1
hour 20 minutes 18:31 it was creeping
and all a sudden it just shot up 2040
cuz I wasn't breathing in this I was
taking a selfie and all of a sudden boo
but um so 30 minutes had become an hour
and 30 minutes but that's just to 2,000
parts per million and during my next
test I realized that my breath after
coming out of the algae was being
reduced by over 90% meaning the ru might
stabilize around 3,500 parts per million
the most concentrated anything is what's
coming right out of my mouth right now
and putting the reading right at the
output what I'm going to get is the
highest concentration post algae
theoretically this room shouldn't get
any higher than that reading but getting
there could take a very long time so for
the next test I came up with a
plan yes that is a CO2 tank and the plan
is to jump the CO2 into the high 3000s
and then wait and see see does it go
down it's holding right around 3557
let's see if we can make it go down once
the CO2 had mixed evenly into the air
and the meter stabilized I started
exhaling only into the funnel and waited
for 29 minutes it's going up really
slowly but it won't go down I didn't
dare speak and accidentally leak some
CO2 but I checked the meter and timer
religiously waiting for the flip then it
happened and all I could do was silently
freak out out but the battle wasn't over
yet I still had to make sure that this
was really happening but as the CO2
slowly began creeping up again I checked
the output of the algae tank and it
wasn't great all right I can talk hey
the room has held it's held right around
there it's dropped gone up a little
dropped it seemed like it's holding
steady but I will say that the air
coming out of the big algae tanks is
it's like 4,100 so it's elevated the
success is tenuous at best it's probably
just going to slowly Elevate over time
this is a system it's just it's
underpowered I'm thinking that I
probably would need another 50g setup so
I built another 50g
setup the following test seemed to show
stability in the high 3000s so I added
another 50 Gall which seemed to
stabilize in the high 2000s but all of
this was with artificially introduced
CO2 and each test only took place over
the course of an hour or so it was like
29 15 14 13 and then it was 29 17 19 now
it's 2910 and you know I just wasn't
certain that this really proved that it
was working plus up to this point I had
still never measured the actual oxygen
levels of the room and I realized that
there was no way around it I was going
to need to get an oxygen gas meter do a
new Baseline test all the way to 5,000
with the reactors turned off then turn
them back on and settle in for the
biggest test of of all and that's what
I'm going to do spend a day in the
sealed room but I haven't done it yet
because it's a big deal to spend an
entire day in a sealed room
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