It turns out that human scattering contains rare metals such as gold, silver and copper for several hundred billion yen

ByBullion Vault

Studies have shown that rare metals such as gold are contained in human excreta and that rare metals equivalent to worth of $ 13 million (about 1.6 billion yen) per million Americans are discharged . This means that there is a possibility that rare metals equivalent to 480 billion yen can be taken from the excretion of the whole Americans by a simple calculation.

Characterization, Recovery Opportunities, and Valuation of Metals in Municipal Sludges from U. S. Wastewater Treatment Plants Nationwide - Environmental Science & Technology (ACS Publications)
http://pubs.acs.org/doi/abs/10.1021/es505329q

Sewage - yes, poop - could be a source of valuable metals and critical elements | EurekAlert! Science News
http://www.eurekalert.org/pub_releases/2015-03/acs-s-y022015.php

US Geological Survey (USGS)Dr. Catherine · Smith and his colleagues analyzed the components of sludge discharged from the US sewage and discharged to the soil and river by electron microscopy and found that yttrium (Y), lanthanum (La), cerium (Ce) , Polaceodium (Pr), Neodymium (Nd), etc.LanthanoidDiscovered that metals such as ruthenium (Ru), rhodium (Rh), palladium (Pd), silver (Ag) are derived from "people", whereas they are derived from soil components. That is, these metals exude into the soil from human excrement.


Dr. Smith's research calculates the value of 13 particularly useful metals such as silver, gold, copper, phosphorus, zinc, iron, palladium, manganese among other metals derived from humans, with about 1 million Americans It is estimated that the emissions per capita will increase to 13 million dollars (about 1.6 billion yen). Also, according to Dr. Smith, if we can remove metal components derived from people discharged into forests and rivers, we will have two benefits in terms of protecting the natural environment with economic value. In the United States, half of the sludge treated by the sewage treatment plant is sprayed as landfill and the other half as fertilizer in the forest, but Dr. Smith develops a method to separate valuable metals from sludge and collect them We point out the necessity.

ByDbarronoss

The hidden "gold mine" lurking in such a modern society is known not only to man-made but also a wide variety, and even in JapanHow to take out gold and rare metals from PCs and electric appliances boards (motherboards) and smartphonesAndHow to remove pure gold from ash stuck to the chimney of the factoryAnd so on are being executed.