francisco

joined 1 year ago
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"Oakland Unified School District began this school year with some unsettling news: the drinking water in the district’s schools had tested positive for dangerously high levels of lead.

The district had found high levels of lead in the water during tests conducted over spring and summer, but it didn’t share those results with parents and staff until this August.

Lead testing hasn’t been required in California schools for the last five years. That means Oakland Unified is unusual among California school districts in that it knows that there’s a lead problem at all."

 

[ not exactly about water but about what to do when there‘s no water. It‘s Punk, but not stellar ]

[–] francisco 2 points 9 months ago (2 children)

Yes, I thought that too. Been avoiding running plastic stuff in my dishwasher for 5 years ...and always using these packs.. Colour me 'not cynical enough'.

[–] francisco 1 points 9 months ago

Microplastics pilling on.

[–] francisco 1 points 11 months ago

10w is impressively low. And totally justifies the convenience in a lot of cases.

Thanks for the info.

[–] francisco 2 points 11 months ago (2 children)

10watts on stand-by? That's impressive. I didn't find that info on the website. Can you point me to where that is? plz

[–] francisco 9 points 11 months ago (3 children)

Better for what?

Moving parts and complexity makes it more prone to failure.

Also, how much energy do you need to keep this working? It's not said on the website.

Granted, both kettle and this zori trade energy and complexity/failure-potential for convenience. Much more so the zori. How much is unknown. On the simple, less-energy end, you'd use an electrical resistance in an insulated jar.

All electric kettles will fail at some point. They have moving parts and are designed for obsolescence.

In my place I use a kettle that allows me to boil 1 cup of water. The filter mesh has failed long ago but the water does not have hardness. Instead I use a small improvised cap to keep the flow of vapour to the cut off thermostat (usually at the bottom of the handle).

[–] francisco 1 points 11 months ago* (last edited 11 months ago)

Sounds well intentioned. But..

I feel that there are any metrics supporting claims of environmental benefits, like saving water, treating water, removing pollutants.

Is iron oxide a pollutant? By itself I would not have though so.

What makes this different from finding a mineral resource and extracting it to sell?

EDIT: A couple of informative and interesting follow up links

Wikipedia on Acid mine drainage.

Professor [Carl Kirby] paints a bright picture with 'yellow boy' [from Pennsylvania's acid mine drainage]

[–] francisco 2 points 11 months ago (14 children)

small scale solar like this is quite inefficient compared to grid-scale stations.

grid-scale generation is much more effective, both in cost and generation efficiency.

Can you explain a bit better on the magnitude of these differences and why they exist? Thx

[–] francisco 2 points 1 year ago* (last edited 1 year ago)

It was good advice.

The basic goal for treated wastewater is to have a low amount of easily digestible carbon source food.

Then usually the goal is about reducing the amount of other nutrients as nitrogen, then phosphorus..

All of this designed to avoid an unbalanced overgrowth of microbes in the water body that receives the wastewater stream. Were dilution, the sun and natural microbial predation are expected to further stabilize the (waste)water and allow for the death of contagious disease carrying microorganisms.

In the last couple of decades the research focus also looks at maybe reducing the amount of micropullutants these wastewaters are carrying


like non degraded medicines or other substances that have been found to have nefarious effects on the environment and maybe humans. ---research.

When the goal is recycling the water, consideration is made to the content of disease causing microorganisms, like E. Coli, Staph., and a wide miriad of parasites that the current modern world best practices (barely) keep at bay - like tenías, giardia, etc., etc., etc.. And not much is known about wastewater and the spread of viruses (like the COVID one).

Recycled water can be improved, usually at a higher cost of treatment. And always regarding specific targets. The unknowns and unmeasurables are not considered.*

So, yes, not all recycled water is brought to the same quality.

..It was good advise.

EDIT: * nowaday, at research level there are a few million dollar plus equipments that are quite a bit thorough on measuring stuff. And the unknown unknowns can be quite more controlled. But at a legal level things are far from it.

[–] francisco 3 points 1 year ago

Look for "Portugal: How much of the country’s electricity comes from renewables?" in the bottom quarter.

[–] francisco 0 points 1 year ago* (last edited 1 year ago)

Is it hard to believe or have you not thought about it hard enough?

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