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septic tank

a tank in which solid organic sewage is decomposed and purified by anaerobic bacteria.
1900-05 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for septic tank
  • Do not use a garbage grinder or disposal, which feeds into the septic tank.
  • The change in chemical composition is due to fertilizer run off, run off from a pig farm and from septic tank overflows.
  • In one of these, the septic tank has been out of order for several months.
  • Stucco abounds, pastels are the rage and every where you turn are fliers for septic tank pumping or driveway repair.
  • septic tank filters are designed to keep solid particles in the septic tank.
  • Effluent flows into the pump chamber from the septic tank.
  • In this case the septic tank is located off to the left out of sight.
  • Report of a septic tank overflowing into a catch basin.
  • Funds were also awarded to establish a septic tank pump-out rebate program.
British Dictionary definitions for septic tank

septic tank

a tank, usually below ground, for containing sewage to be decomposed by anaerobic bacteria
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Encyclopedia Article for septic tank

sewage-disposal unit used principally for single residences not connected to sewer lines. It consists ordinarily of either a single- or double-compartment concrete or steel tank buried in the ground, so arranged that settled sludge is in contact with the waste water as it flows through the tank and thence to a tile drain field. Solids are decomposed by the anaerobic bacterial action of the sludge. After several years the accumulation of sludge interferes with the action, and a scavenger unit must pump the sludge out of the tank for disposal elsewhere.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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