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Re:Why Isn't Landfill Mining More Popular? by gruez on Friday November 24, 2023 @02:10PM (#38407111)
>you don't have literal square miles of landfills that occupy land

Land area is a non-issue. Google says Switzerland produces "80 to 90 million tonnes" of garbage per year. Assuming that garbage has the same density of water, and a landfill is 10 meters deep, a 1 sq mi landfill will last 287 years. Moreover, Wikipedia says Switzerland has 15,940 square miles of land, so that will only take up 0.006% of the country's land area.

>eventually will leak lovely chemicals into groundwater

this is a non-issue in modern landfills because they're designed with various mechanisms to prevent that from happening (eg. lining).

Re:Why Isn't Landfill Mining More Popular? by morsch on Friday November 24, 2023 @02:44PM (#38407431)
Is your math right? 90 million tons of water/10 m gets me 1.7 km2, so a 1 sq mi landfill would last around ... 1 year, not 287.

That said, of the 90 million of waste, 60-70 million is construction waste, and just 6 million tons is municipal waste. On the other hand, I'm not sure you can just assume that waste has the same density as water; from a cursory glance it seems to about 1/3.

https://www.bafu.admin.ch/bafu/en/home/topics/waste/in-brief...

https://www.wolframalpha.com/input?i=%28volume+of+90+million... (sorry I was all out of napkins)

Re:Why Isn't Landfill Mining More Popular? by lanna on Friday November 24, 2023 @04:59PM (#38408836)
A mile is 1609m

A sq mile is 1609x1609 = 2,588,881 square meters

Times 10m, 25,888,810 cubic meters

A cubic meter of water weighs 1000 Kg

Re:Why Isn't Landfill Mining More Popular? by lgessler on Friday November 24, 2023 @04:52PM (#38408779)
Re:Why Isn't Landfill Mining More Popular? by fisherjeff on Friday November 24, 2023 @04:51PM (#38408773)
Don’t think it’s even a year… should be 8-9e6 m^2 per year, or 3-3.5 mi^2 per year.
Re:Why Isn't Landfill Mining More Popular? by gruez on Friday November 24, 2023 @05:15PM (#38408982)
> Is your math right? 90 million tons of water/10 m gets me 1.7 km2, so a 1 sq mi landfill would last around ... 1 year, not 287.

You're right, looks like I forgot to convert liters to tons.

>On the other hand, I'm not sure you can just assume that waste has the same density as water; from a cursory glance it seems to about 1/3.

is this before or after compaction? Intuitively speaking, most things I throw out would sink in water. A garbage bin/trash bag might float because it has a bunch of air, but presumably that will all get pushed out when buried 10 meters deep.

Re:Why Isn't Landfill Mining More Popular? by user_named on Saturday November 25, 2023 @11:09AM (#38414363)
Well you clearly don't have great intuition
Re:Why Isn't Landfill Mining More Popular? by sgregnt on Saturday November 25, 2023 @06:42PM (#38417867)
Why is that, could you elabotate?
Re:Why Isn't Landfill Mining More Popular? by notfromhere on Friday November 24, 2023 @02:16PM (#38407168)
There is no evidence that those mechanisms will last longer than the pollution from the landfill. Nor should we base plans on "nothing bad will definitely happen"
Re:Why Isn't Landfill Mining More Popular? by justinator on Friday November 24, 2023 @04:35PM (#38408630)
>Assuming that garbage has the same density of water

It is probably much less dense.

>Moreover, Wikipedia says Switzerland has 15,940 square miles of land, so that will only take up 0.006% of the country's land area.

I do not think many landfills are located in mountains and Switzerland is fairly mountainous. The available livable and arable land is a fraction of its total land area.

Re:Why Isn't Landfill Mining More Popular? by avion23 on Friday November 24, 2023 @02:32PM (#38407312)
this non-issue happened in a modern landfill near my hometown.

They just used a different grade of material and pocketed the difference.

The chemicals area leaching now into the groundwater. Any researchers reporting on that are sued. Even police is used for intimidation.

Country is Germany.

Re:Why Isn't Landfill Mining More Popular? by lapphi on Friday November 24, 2023 @05:17PM (#38408995)
I think many of us get so used to modeling problems in closed systems that we have a blind spot about human behavior irl.
Re:Why Isn't Landfill Mining More Popular? by dmos62 on Friday November 24, 2023 @06:51PM (#38409691)
I'm continually surprised by blatant corruption in first world countries. It's like I expect privilege to translate into integrity.
Re:Why Isn't Landfill Mining More Popular? by kappuchino on Saturday November 25, 2023 @02:53AM (#38412014)
Can you elaborate which town and landfill?
Re:Why Isn't Landfill Mining More Popular? by Teever on Friday November 24, 2023 @05:26PM (#38409080)
Just because something is designed to do something doesn't mean that it will.

Especially on long time scales.