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Insitu anaerobic reactive zone for insitu metals precipitation and to achieve microbial de-nitrification

  • US 5,554,290 A
  • Filed: 04/11/1995
  • Issued: 09/10/1996
  • Est. Priority Date: 04/11/1995
  • Status: Expired due to Term
First Claim
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1. A method for removing contaminants dissolved in ground water, comprising the steps of:

  • establishing an injection well from the ground surface to a saturated zone contaminated with heavy metal compounds;

    placing a conduit within said injection well, wherein said conduit has a fluid-permeable section below the water table of said contaminated saturated zone; and

    supplying carbohydrates and sulfates capable of being utilized by an indigenous population of microorganisms to said conduit such that said carbohydrates and said sulfates are forced out of said fluid-permeable section into said contaminated saturated zone whereby the indigenous population of microorganism will metabolize said carbohydrates leading to the formation of anaerobic conditions and will metabolize said sulfates to produce sulfide ions which will cause the in-situ precipitation of the heavy metal compounds.

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