CadeJohnson

joined 1 year ago
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[–] [email protected] 1 points 9 months ago (2 children)

We are going to need a lot more of this kind of work. I read on permaculture sites about the need to pre-load biochar with nutrients - planting seeded biochar without nutrients could be unproductive. Biochar loading also depends on soil type, how the biochar is made, and how it is applied (tilled in or top-dressed). Size probably matters - big chunks will eventually break apart, but moderate size reduction gives better distribution. Fine dust will not provide the same degree of soil aeration. So, the devil is in the details.

[–] [email protected] 16 points 10 months ago

gotta admit, that is a lot safer approach than trying some shit on the real thing

[–] [email protected] 8 points 10 months ago (1 children)

The statistic of low Firefox use is based on accessing US government websites. Could it be that there is significantly LESS government site access by the population of users that prefer Firefox? As a corollary I recently read that game companies observed significantly HIGHER bug reporting from Linux users on Steam, not because there were more Linux-related bugs, but simply because that set of users were more likely to initiate bug reports. Of course Firefox is not Linux and Steam is not the world, but a statistic from a relatively narrow segment of the internet should not be assumed representative of the whole.

[–] [email protected] 1 points 10 months ago

Biochar is such an expanding area of investigation, it would be difficult to write a comprehensive book at this point. Of course the root idea of partial-combustion to make soil amendment is well-enough known, but there is much being learned about how to alter the properties of the char by how the pyrolysis is performed. There is much to be learned about how much char to add and how to pretreat the char. Beside burning to make char, there are other ways it can be heated and those affect the type of pyrolysis products that form - molten salt, steam, and subcritical hot water are all gaining prominence. The management and use of the pyrolysis products aside from the char is also a complex topic.

[–] [email protected] 2 points 10 months ago

sorry nobody has replied - I'm no help for you from here in Puerto Rico. Are you familiar with the site iNaturalist.org? When we're looking for a species that seems to be missing, we use iNaturalist to check for sightings in the region. You can filter by dates.

[–] [email protected] 1 points 10 months ago

I also recently read about "hydrocarbonization" which is another approach for pyrolyzing sewage sludge. Pyrolysis of biomass on a dry basis is often energy-intensive in part because of moisture in the biomass. Nowhere is this more relevant than with sewage sludge, which leaves a wastewater plant at only about 25% solids, typically (though it has a solid appearance like damp clay). If the pyrolysis is performed IN water (which means under pressure if one wants to avoid evaporating the contained water), it can not only still occur, but the water at high temperature and pressure is an active medium for converting some of the biomass into smaller organic molecules.

Upshot is that there is quite a lot of work going on nowadays to be creative with biomass management - that seemed to be of low interest even a decade ago.

[–] [email protected] 1 points 10 months ago

wrong, western philosophy is often based on dichotomies - something is either this or that, but it is more of an analytical tool (I am not nature despite that I am a part of nature). Eastern philosophies are often mystic, though there is western mysticism - that some aspects of existence are incomprehensible on a rational basis and therefore dichotomies are illusory. But such a perspective does not inherently make people better stewards of the environment - in fact they might conclude that their every action is "natural" by definition.

[–] [email protected] 5 points 10 months ago
[–] [email protected] 2 points 11 months ago

In the US, stove burners are rated in the confusing units of "BTUs" which is actually a unit of energy, not power. When they say BTU, they mean BTU/hour. The highest-rated burners on a typical stove are about 10,000 Btu (per hour), but high-end stoves can get up to about 18000 - that is equivalent to about 5000 watts. My single-element induction top is only rated for about 1000 watts. So although it heats and cools rapidly, I suspect it is not up to the demands of wok cooking (unless one wants to cook only very small portions).

[–] [email protected] 1 points 11 months ago (2 children)

not Chinese, but I cook a lot with a wok. I also have a single induction cooktop and surprisingly, the wok has enough iron to work with it while some old cheap conventional cookware did not. However, wok cooking needs to be hot all over the wok and not just in that little point where the wok is close enough to the induction coil.

I have a conventional propane stove which I need to keep, because here in Puerto Rico the power system is quite unreliable (especially during a bad hurricane year). But the conventional stove burners are not really hot enough. With a 1/16 - inch drill bit I could increase one of the burners capacity substantially. I painted the stove knob red so people have some warning when they light that burner! It burns more gas, but wok cooking is really fast, so in the long run it is probably more efficient than lots of other cooking approaches.

I would definitely consider a wok-shaped induction heater. Induction heating is quite remarkable.

[–] [email protected] 3 points 11 months ago (1 children)

Have you tried your hand at biochar? I know composting the chips for mulch is high value in a farm operation, but a few tons of biochar can work like a permanent upgrade - improving the soil permanently with one addition - though ongoing permaculture operation continues. I am about to make a biochar cooker out of two steel barrels - inner fuel chamber and outer draft shell. It would probably be more effective with wood scraps than chips though - some air passages through the fuel.

To test it out for myself, I made a miniature version documented at https://github.com/jcadej/TLUD-biochar-reactor (uses a gallon paint can for the fuel chamber. You could test it small and see how it does with wood chips. When I make my bigger version, I will add it to the github project. My rough idea is to cut one barrel down the side and squeeze it smaller and bolt it so it fits inside the other.

[–] [email protected] 2 points 11 months ago (1 children)

I'd hate to think modern society is based on a giant elaboration of poker, but I can't rule it out - it MIGHT not be the worst outcome, but a pseudo-equilibrium far from the best. Every young person knows something accessible in the past is now lost to them - not sure what it is, but there is a hole. And yet, the social track laid out is almost unavoidable.

I traveled a good bit the past 20 years and I've experienced first-hand the really hard work and the immense gratification of simple farming. Nobody wants to live like that (at least so they think). Having done it, I can't even say I recommend it over what modern society seems to offer. But since the best option on offer is not a true equilibrium, as the climate is making abundantly clear, what is on offer may be illusory. An alternative equilibrium - tried and true - is worth considering when opportunity arises: subsistence farming. It is NOT simple or easy - don't wait until there is no other option.

 

This is a bit tangential, but it is a well-framed commentary which applies when we think about CDR.

cross-posted from: https://aus.social/users/ajsadauskas/statuses/111062337668091472

Right now, could you prepare a slice of toast with zero embodied carbon emissions?

Since at least the 2000s, big polluters have tried to frame carbon emissions as an issue to be solved through the purchasing choices of individual consumers.

Solving climate change, we've been told, is not a matter of public policy or infrastructure. Instead, it's about convincing individual consumers to reduce their "carbon footprint" (a term coined by BP: https://amp.theguardian.com/commentisfree/2021/aug/23/big-oil-coined-carbon-footprints-to-blame-us-for-their-greed-keep-them-on-the-hook).

Yet, right now, millions of people couldn't prepare a slice of toast without causing carbon emissions, even if they wanted to.

In many low-density single-use-zoned suburbs, the only realistic option for getting to the store to get a loaf of bread is to drive. The power coming out of the mains includes energy from coal or gas.

But.

Even if they invested in solar panels, and an inverter, and a battery system, and only used an electric toaster, and baked the loaf themselves in an electric oven, and walked/cycled/drove an EV to the store to get flour and yeast, there are still embodied carbon emissions in that loaf of bread.

Just think about the diesel powered trucks used to transport the grains and packaging to the flour factory, the energy used to power the milling equipment, and the diesel fuel used to transport that flour to the store.

Basically, unless you go completely off grid and grow your own organic wheat, your zero emissions toast just ain't happening.

And that's for the most basic of food products!

Unless we get the infrastructure in place to move to a 100% renewables and storage grid, and use it to power fully electric freight rail and zero emissions passenger transport, pretty much all of our decarbonisation efforts are non-starters.

This is fundamentally an infrastructure and public policy problem, not a problem of individual consumer choice.

#ClimateChange #urbanism #infrastructure #energy #grid #politics #power @green

 

tldr several BILLION tons per year by 2050! Roughly equivalent to the total mass of all the cars in the world - every year.

9
Northern Bishop (slrpnk.net)
submitted 1 year ago* (last edited 1 year ago) by [email protected] to c/[email protected]
 

At Laguna Cartagena, near Cabo Rojo, Puerto Rico (red bird with black chest and mask, perched on green leaves, lit by sunrise)

 

cross-posted from: https://mander.xyz/post/2421501

There seems to be a huge number of miscellaneous projects for a specific type of environmental restoration or some other activity that is specifically aimed at carbon sequestration. For example, seagrass restoration alone has a plethora(1,2,3). Is there a decent list of these projects? I found this cool list of CCS projects(4), but that’s different.

If such a list exists, I have another question: Is there an objective way to compare their effectiveness?

https://www.projectseagrass.org

https://www.medseafoundation.org/index.php/en/portfolio-ita-2/a-sea-forest-to-save-the-planet/34

https://www.seegraswiesen.de/en/

https://en.m.wikipedia.org/wiki/List_of_carbon_capture_and_storage_projects

 

This is a video of my off-grid house in the Dominican Republic, which is featured in this community's title background. It is for sale, so buy it and you can be famous! lolz https://drive.google.com/file/d/16s22L6fgJRtxPQ-a6_aEWy8QJsgsWexN/view?usp=sharing

 

Net Zero is when the bathtub quits overflowing, CDR is how we mop up the water and pump out the flooded basement.

 

These EG4 batteries from Signature Solar look like a pretty good deal to me; $265/kWh according to their calculation. I paid a little over $500/kWh for some 12V form-factor lithium batteries at the start of the year and thought those were a reasonable price.

 

cross-posted from: https://beehaw.org/post/2196737

Like many of you, birds are very special to me. I connect with them like I don’t any other living creature, save my wife and kids. I photograph them. I’ve covered my body in nothing but bird tattoos.

To see that a THIRD of them have disappeared is like a knife to the heart.

 

Today's adventure: a couple of rainy days caused low battery levels, but not too low I thought - still 30% or so; these are lithium batteries and can deep cycle. They are "smart" batteries and if one is full in series, none can charge further - so they should all be at the same charge level all the time. But a couple had gotten out of step somehow and when they reached zero everything shut down.

How to bootstrap it? With no battery output (since a zero battery turned itself off and would not let the battery bank show any voltage!) - there is no way to activate the inverter and let street power run the battery charger. With no battery power, there is no way to turn on the MPPT controller and charge the batteries!

I could rearrange the banks to put four batteries with remaining charge in series because I have an 8-battery system, and get things restarted; but if there had been only four like when I first installed the system - I'd be in trouble.

Another thing that happened. Before I figured out the battery problem, I was trying to switch back to street-power. Because power from the street comes to the inverter first and then the inverter powers the distribution panel, when the batteries are down, I cannot get street power to the distribution panel. I could install a manual bypass, but it is not a commonly needed item and it is a large amp switch. So I removed the inputs and outputs at the inverter and bypassed manually. That worked fine. But in the process of disconnecting or reconnecting, I must have loosened the neutral connection to the inverter. So when the inverter was working again and I checked voltage, I only checked across the two hot legs - yay, 240V. I did not check that each leg was 120v from neutral! They were not: one leg was at zero and the other was at 240. I found this discrepancy fairly quickly after only destroying an outlet strip, the oven control electronics from a very old stove we were wanting to replace, and the controls of an old Sharp microwave oven with the 4, 7, 9 and Clear buttons not working. Woohoo we have a new stove out of the deal!

 

cross-posted from: https://slrpnk.net/post/611077

I have been thinking on how to claim every energy that comes on my plot. Technology goes more and more into harvesting the smaller left over energy. Ive seen examples in the Netherlands where startups try to get energy from a chip (I have been thinking on how to claim every energy that comes on my plot. Technology goes more and more into harvesting the smaller left over energy. Ive seen examples in the Netherlands where startups try to get energy from a chip (http://www.nowi-energy.com, https://memsys.nl) and a transparent solar panel layer on windows etc. Here in Lithuania sometimes the whole day has an overcast sky and that is the solar energy that we are getting. I know that with heavy overcast days a standard solar panels output can be as low as 10%. So a 5kWp can generate instead of 3.75kW produce only a meager 370W. My question to you, arent there other solar technologies that are adjusted to this overcast circumstances? So to gain more efficiency from diffuse lighting or from frequencies that can pierce the clouds more (like infrared spectrum)?

Some sunday morning pondering....

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