Fluidized bed puts zip into electrolytic recovery of metals from wastewater

Article Abstract:

Konica Corp., based in Tokyo, Japan, has developed an electrolytic system, that integrates a fluidized bed so that heavy and noble metals could be recovered from industrial wastewaters. The firm said that compared to ion exchange or chemical precipitation, the method is uncomplicated and less expensive. The first commercial application of the device, which is said to have an improved electrical efficiency, will have a September 1998 start-up. The equipment, which will be utilized at a Japanese copper refinery, will treat 50 m.t./d of wastewater.

Comment:

Develops an electrolytic system, that includes a fluidized bed to recover heavy and noble metals from industrial wastewaters

Konica Corp.

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A shot of oxygen doubles the capacity of fluidized-bed reactors

Article Abstract:

Messer Griesheim GmbH of Kresfeld, Germnay, has put into operational status its oxygen-injection process for its fluidized-bed reactors. The process introduces pure fluidized oxygen into the distributor plate at a flow speed of Mach 2 to ensure a maximum of 36.8% potent concentration. The oxygen-introduction application is done across the fluidizing air flow that amplifies mixing, mass- and heat-transfer. Messer collaborated with Bayer AG in developing the process which took them two years to complete.

Comment:

Has put into operational status its oxygen-injection process for its fluidized-bed reactors

Germany, Nonmanufacturing technology, Messer Griesheim GmbH

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Improving wastewater pH control

Article Abstract:

The success of the biological, physical and chemical treatment of wastewater depends on the achievement of desired hydrogen-ion concentration (pH). To effectively implement this task, a pH-control system that was designed based on the rational analysis of flow, pH and titration data from samples drawn during the periods when the pH fuctuates the most should be employed.

Water Supply and Irrigation Systems, Water Treatment

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