Basf Aktiengesellschaft

Basf Corporation

Walter Weisbrodt

Wolfgang Habermann

Theo Proll

Peter Hammes

Werner Bochnitschek

William C Hiatt

Uwe Wegmann

Walter V Burnham

Johann Fritzmann

Edward G Madzy

A method and a reactor system for continuous waste water treatment are disclosed. The method involves the steps of continuously flowing an influent into a treatment basin and continuously flowing an effluent out of the treatment basin into a clarifier. The influent is continuously and completely mixed in the treatment basin. In an additional step, oxygen is introduced into the basin for a first predetermined time period. The introduction of oxygen into the basin is then stopped for a second predetermined time period and then the steps of introducing and stopping the oxygen are repeated. The reactor system includes a treatment basin having an inlet for continuously receiving an influent stream, an outlet for continuously discharging an effluent stream, and contains a mixed liquor. At least one mixer completely and homogeneously mixes the mixed liquor. At least one source of oxygen discharges into the mixed liquor and a controller connected to the source of oxygen cycles the source of oxygen on and off In another embodiment the present invention is a reactor system for treating waste water comprising: a treatment basin having an inlet for continuously receiving an influent stream, an outlet for continuously discharging an effluent stream, and containing a mixed liquor; at least one mixer, said at least one mixer completely and homogeneously mixing said mixed liquor; at least one source of oxygen, said at least one source of oxygen discharging oxygen into said mixed liquor; and a controller connected to said at least one source of oxygen, said controller cycling said at least one source of oxygen on and off to provide alternating cycles of aerobic and anoxic conditions in the basin.

Continuous flow completely mixed waste water treatment method

Alkali metal sulfates are electrolyzed to more concentrated solutions of alkali metal hydroxide and sulfuric acid by using a three-compartment electrodialysis cell at temperatures of .gtoreq.70.degree. to .gtoreq.150.degree. C. and current densities of from 0.5 to 15 kA/m.sup.2 using an anion exchange membrane whose polymeric ion exchange matrix comprises a styrene/divinylbenzene copolymer containing very strongly basic quaternary ammonium groups and a hydronium ion blocker, on whose central compartment side is an ion exchange layer or membrane containing tertiary or secondary amino groups.

Electrolysis of alkali metal sulfates

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Deidesheim, Germany

Walter Weisbrodt