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Liquid Purification

Biological-phosphorous-removal-from-wastewater-using-multiple-recombinable-basins

Purification process

OF THE INVENTION Any water-soluble inorganic carbonate or bicarbonate can be used in this ...

Method for removal of monovalent ions from ZnSO.sub.4 electrolyte by electrodialysis

We claim: 1. A method for the purification of zinc sulfate electrolyte containing concentrations of ...

Method of producing acids and alkalis

In order to solve the above-mentioned problems, the present inventors have conducted keen study and ...

Multiple capillary biochemical analyzer with barrier member

OF PREFERRED EMBODIMENTS Reference is first made to FIGS. 1 and 2, which show an analyzer 20 for ...

Blood and tissue detoxification apparatus

FIG. 1 shows schematically, partly in section and partly in plan view, an implantable cell in ...

Process and apparatus for the quantitative determination of cations or anions by ion chromatography

OF THE PREFERRED EMBODIMENTS The invention consists of a procedure and an apparatus as follows: ...

Method for balancing background conductivity for ion chromatography

In accordance with the invention, a method has been provided for balancing the background ...

Apparatus for chromatographic analysis of ionic species

It is, therefore, an object of the invention to provide an apparatus and method for the ion ...

Electodeionization apparatus and method

The present invention provides a method and apparatus capable of continuously producing water of up ...

Separation of protein antigens of Bordetella bacteria by affinity chromatography

What is claimed is: 1. A process for purifying protein antigens of bacteria of the Bordetella genus ...

Biological phosphorous removal from wastewater using multiple recombinable basins

Details

Inventors: Todd, Michael D.; Cox, Raleigh L.;
Assignee: United Industries, Inc. (Baton Rouge, LA)
Primary Examiner: Wyse; Tom
Assistant Examiner:
Attorney, Agent or Firm: Kiesel; William David, Tucker; Robert C., Monahan; Timothy J.

A process for treating wastewater to biologically remove phosphorous as well as lowering ammonia, TSS and BOD levels is provided. The process employs a plurality of basins which may be individually controlled to achieve anaerobic, anoxic or aerobic conditions. The basins are reconfigurable in that the flow of influent to a basin, transfer of mixed liquor between basins and effluent discharge from a basin can be varied to create a treatment cycle which has features of both continuous and batch processes while minimizing recycle rates and hydraulic level changes.

DETAILED DESCRIPTION Therefore, one object of the invention is to provide a wastewater treatment plant featuring biological phosphorous removal and reduction of ammonia and total nitrogen in the plant effluent as well as traditional removal of TSS and BOD.
Another object of the invention is to provide a treatment plant having features of a continuous process while minimizing recycle of mixed liquor between tanks.
Another object of the invention is to provide a treatment plant having individual tanks which convert from anaerobic/ aerobic/anoxic states while minimizing hydraulic level changes within the tanks.
Another object of the invention is to provide a process which can be installed by retrofitting existing plants having oxidation ditches.

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