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US 4,289,626 AGranted
Wastewater treatment
AssigneeSterling Drug Inc.
InventorsPaul V. Knopp, Walter Burant, Jr.
Life of this patent
Estimating the term…
Abstract
The invention relates to method and apparatus for the treatment of wastewaters using a rotating biological contactor in combination with an adsorbent.
Claims6
A process for treating wastewater comprising the following steps:
- a. contacting wastewater in a stream in a biological contactor apparatus which has a multiplicity of surfaces therein alternately immersed in the stream and air above the stream, for a period of time of at least 1/2 hour while adding co-currently to the stream in the biological contactor apparatus an adsorbent capable of adsorbing impurities from the wastewater;
- and
- b. removing accumulated suspended solids from the contactor apparatus at a rate substantially equivalent to the rate at which solids accumulate within the contactor.
A process for treating wastewater comprising the following steps:
- a. contacting wastewater in a stream in a biological contactor apparatus which has a multiplicity of surfaces therein alternately immersed in the stream and air above the stream, for a period of time of at least 1/2 hour while adding to the stream an adsorbent capable of adsorbing impurities from the wastewater, and
- b. removing accumulated suspended solids from the contactor apparatus at a rate substantially equivalent to the rate at which solids accumulate within the contactor,
- wherein the adsorbent is added at the downstream end of the biological contactor apparatus and is moved by the surfaces in the contactor apparatus in countercurrent relationship with the bulk of the liquid flow.
Dependencies are inferred from the claim text.