Waste treatment process
AssigneeEcolotrol, Inc.
InventorJohn S. Jeris
Life of this patent
Estimating the term…
Abstract
A biological process for removing biochemical oxygen demand from waste water by forming a fluidized bed of microorganisms attached to a solid particulate carrier, continuously passing waste water to be treated through said fluidized bed, retaining the waste water in the fluidized bed for a sufficient period of time while controlling other necessary parameters to biologically convert substantially all of the biochemical oxygen demand to be removed from the waste water to methane gas, carbon dioxide and cellular material, and thence withdrawing the biologically converted products. In one form of the invention nitrified effluent is added to the waste water and the mixture is biologically converted to methane gas, carbon dioxide, nitrogen gas and cellular material.
Claims11
A biological process for removing biochemical oxygen demand from waste water, which comprises:
- forming a fluidized bed of acid forming, including methane forming, microorganisms attached to a solid particulate carrier,
- continuously passing waste water consisting essentially of biochemical oxygen demand to be treated through said fluidized bed,
- retaining said waste water in said fluidized bed for a sufficient period of time while maintaining said fluidized bed at a sufficient temperature and while maintaining said fluidized bed under substantially anaerobic conditions to biologically convert substantially all of the biochemical oxygen demand to be removed from the waste water to methane gas, carbon dioxide and cellular material;
- and
- continuously withdrawing said methane gas and carbon dioxide from said fluidized bed, and removing excess cellular material from said particulate carrier to leave a thin layer of said microorganisms on said particulate carrier.
Dependencies are inferred from the claim text.