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Equipment for treating waste water

  • US 4,824,563 A
  • Filed: 07/28/1986
  • Issued: 04/25/1989
  • Est. Priority Date: 12/04/1985
  • Status: Expired due to Term
First Claim
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1. An equipment for treating waste water comprising:

  • (a) a source of waste water including organic substances;

    (b) an anaerobic tank having a flow path having an inlet connected to the waste water source for having a supply of the waste water from the waste water source, the flow path having an outlet;

    (c) means for supplying anaerobic bacteria into the flow path at a first position for anaerobically treating the waste water;

    (d) at least one biological contact zone provided in the flow path at a second position downstream of the first position;

    (e) a bacteria culture tank for culturing methane bacteria;

    (f) means for supplying the cultured methane bacteria from the bacteria culture tank to the at least one biological contact zone to further anaerobically treat the waste water passing the at least one biological contact zone;

    (g) an aerobic tank connected to the outlet of the flow path of the anaerobic tank for having a supply of the waste water from the anaerobic tank, the aerobic tank containing activated sludge including aerobic bacteria for aerobically treating the waste water discharged from the anaerobic tank; and

    (h) means for discharging the treated waste water from the aerobic tank.

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