PROCESSING SYSTEM FOR WASTE WATER CONTAINING HEXAVALENT CHROMIUM
PURPOSE:To provide a reduction processing system for waste water containing hexavalent chromium so that addition of a reducing agent can be accurately controlled. CONSTITUTION:In the reduction processing system for waste water containing hexavalent chromium, waste water containing hexavalent chromiu...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | PURPOSE:To provide a reduction processing system for waste water containing hexavalent chromium so that addition of a reducing agent can be accurately controlled. CONSTITUTION:In the reduction processing system for waste water containing hexavalent chromium, waste water containing hexavalent chromium is reduced by addition of a sulfite type reducing agent. The concn. and/or change rate of the concn. of sulfur dioxide gas produced during processing is analyzed by a continuous sulfur dioxide gas analyzer 17 so that the amt. of sulfite type reducing agent to be added is controlled. |
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