U.S. flag An official website of the United States government.
Official websites use .gov

A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS

A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

i

Aeration Efficiency of the In-Line Aeration and Neutralization System

Public Domain


Details

  • Personal Author:
  • Description:
    Acid mine drainage treatment typically involves the removal of soluble metals by neutralization, oxidation, and precipitation. The chemical reactions are frequently limited by the availability of dissolved oxygen. For this reason a study was conducted in the laboratory to establish the aeration efficiency of the In Line Aeration and Neutralization System (ILS). This patented treatment system, developed by the Bureau of Mines, treats mine discharge in a pipeline and involves no moving parts. It consists of two components: a jet pump and a static mixer. Testing procedures were performed in accordance with the American Society of Civil Engineers (A Standard for the Measurement of Oxygen Transfer in Clean Water). The standard requires deoxygenation of a tank of clean water before aeration. The dissolved oxygen concentration in the water is measured over time as it is continuously pumped through the ILS until saturation is achieved. Corrections are made for ambient water temperature and barometric pressure. A total of twenty-eight tests were conducted using two different jet pumps and seven types of static mixers. Each combination of jet pump and static mixer was tested at two operating pressures: 20 psig and 50 psig. The results indicated that there were significant differences in aeration efficiency based principally on the water pressure. All systems transferred more oxygen when operated at 50 psig. Differences between the two jet pumps and four of the mixers do not appear to be significant. The Standard Oxygen Transfer Rates (SOTR) for the best jet pump/static mixer combinations are comparable to those cited by manufacturers of mechanical type aerators. [Description provided by NIOSH]
  • Subjects:
  • Keywords:
  • Series:
    Mining Publications
  • Publisher:
    U.S. Bureau of Mines
  • Document Type:
    Text
  • Genre:
  • Place as Subject:
  • CIO:
    National Institute for Occupational Safety and Health (NIOSH)
  • Division:
    PRC - Pittsburgh Research Center
  • Topic:
    Workplace Safety & Health
  • Location:
    North America
  • NIOSHTIC Number:
    nn:20024758
  • Citation:
    Mine Drainage and Surface Mine Reclamation. Volume I: Mine Water and Mine Waste. Pittsburgh, PA: U.S. Bureau of Mines, 1988 Apr; :403
  • Federal Fiscal Year:
    1988
  • Peer Reviewed:
    False
  • Source Full Name:
    Mine Drainage and Surface Mine Reclamation. Volume I: Mine Water and Mine Waste
  • Collection(s):
  • Main Document Checksum:
    urn:sha-512:057415c0c0cc071e2613443689fa1b36366c1971e0e6263b96a90107d1a7cf9153063bc84e4e5d188a89fc739f1687abbcee9db0bbba6d4d8b1469f74edddc65
  • Download URL:
  • File Type:
    Filetype[PDF - 378.08 KB ]
PREVIOUS
ON THIS PAGE
Details
CDC STACKS serves as an archival repository of CDC-published products including scientific findings, journal articles, guidelines, recommendations, or other public health information authored or co-authored by CDC or funded partners.

As a repository, CDC STACKS retains documents in their original published format to ensure public access to scientific information.
BACK TO TOP