Feces to fortune: US sewage may contain billions in

Mar 23, 2015· One place has already figured out how to profit from poop: A sewage treatment facility in Japan has been mining sludge for gold since 2009, Reuters reported at the time. The Nagano prefecture, northwest of Tokyo, once recorded finding 1,890 grams of gold per ton of ash from incinerated sludge.

Mining for iron oxides in coal mine sludgeEARTH Magazine

Mining for iron oxides in coal mine sludge A young miner in Pittston, Pa., in 1911. Over the past 200 years, miners have extracted billions of tons of coal in Pennsylvania, but drainage from abandoned mines has left the waterways polluted.

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Thickener Level Controller SludgeThickening, Filtering

To participate in the 911Metallurgist Forums, be sure to JOIN & LOGIN Use Add New Topic to ask a New Question/Discussion about Thickening, Filtering or Tailings and Water. OR Select a Topic that Interests you. Use Add Reply = to Reply/Participate in a Topic/Discussion most frequent. Using Add Reply allows you to Attach Images or PDF files and provide a more complete input. Use Add Comment

Tailings Thickener JustificationThickening, Filtering

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Gold mined from sewage sludge ~ Pink Tentacle

Jan 30, 2009· A sewage plant in Japan's Nagano prefecture has started mining gold from sludge, earning a cool 5 million yen $56,000 in its first month of operation. On January 28, sewage plant operator Nagano Prefecture Suwa Construction Office announced that approximately 1.9 kilograms 4.2 lbs of gold can be mined from each ton of molten fly ash

tailing thickener, tailing thickener Suppliers and

495 tailing thickener products are offered for sale by suppliers on Alibaba.com, of which mining thickener accounts for 50%, petroleum additives accounts for 1%, and paper chemicals accounts for 1%. A wide variety of tailing thickener options are available to you, such as chemical auxiliary agent.

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Millions of Dollars Worth of Gold And Silver Lurk in

Jan 20, 2015· Millions of Dollars Worth of Gold And Silver Lurk in SewageAbout 60 percent of sludge is used to fertilize fields and forests, Caldwell reports.mining those landfills might even pay off.

Coal sludgeSourceWatch

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ThickeningResource Book

thickener in a peripheral launder. The conventional thickener relies on the settling velocity of the particles, due to gravity, being greater than the upward velocity of water being displaced to the overflow launder. The conventional thickener can be used with or without flocculants, depending upon the application. If

Dewatering of Mine Drainage SludgeEPA

Dewatering of Mine Drainage Sludge by Coal Research Bureau West Virginia University Morgantown, West Virginia 26506 for the ENVIRONMENTAL PROTECTION AGENCY Project 14010 FJX December, 1971 For sale by the Superintendent of Documents, U.S. Government Printing Office, Washington, D.C. 20402Price $1.00