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Sewage-treating agent, preparation thereof and method for treating sewerage by using the same

A sewage treatment agent and sewage technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problem of low removal rate of suspended solids

Inactive Publication Date: 2009-04-22
乔占印
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] For the treatment of steel mills, power plants and urban sewage, the technologies currently used include ferrous chloride or aluminum sulfate liquid for treatment, and the most commonly used ferrous sulfate or polyaluminum chloride liquid for treatment. The chemical requirements of the above-mentioned treatment agents for sewage The removal rate of oxygen (COD) and suspended solids (SS) is low, generally no more than 20%

Method used

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Embodiment Construction

[0004] The method for preparing sewage treatment agent of the present invention, (1) put 0.1-0.6 tons of aluminum hydroxide powder and 0.5-0.8 tons of hydrochloric acid in the reaction kettle to react for 1-2 hours, then add sulfuric acid to continue the reaction for 1-2 hours , (2) adjust the pH value to 5 with sodium hydroxide to obtain polyaluminum sulfate chloride liquid (ie the sewage treatment agent of the present invention).

[0005] The method for removing COD and SS in power plants, steel mills or urban sewage with the polyaluminum sulfate chloride of above-mentioned preparation is,

[0006] First, dilute the polyaluminum sulfate solution with clear water to a concentration of 10-30%, according to the volume ratio of sewage: polyaluminum sulfate solution of 1000:1-5, slowly add polyaluminum sulfate solution into the sewage under stirring , COD and SS in sewage (power plant sewage, steel mill sewage or urban sewage) can be removed in 3-5 minutes, and the removal rate c...

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PUM

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Abstract

The invention discloses a sewage treatment agent, a preparation method thereof and a method for using the sewage treatment agent to treat sewage, and relates to sewage treatment. The invention aims to provide a sewage treatment agent which has high removal rate to COD and SS of the sewage, a preparation method thereof and a method for using the sewage treatment agent to treat the sewage. The technical proposal of the invention is as follows: the sewage treatment agent is polyaluminum sulfatochloride. A method for preparing the polyaluminum sulfatochloride comprises the following steps: (1) 0.1 to 0.6 ton of aluminum hydroxide powder with a concentration of between 10 and 30 percent and 0.5 to 0.8 ton of hydrochloric acid are added into a reaction kettle to react for 1 to 2 hours at normal temperature; and (2) sulfuric acid is added into the reaction kettle to react for 1 to 2 hours to obtain liquid polyaluminum sulfatochloride, namely the sewage treatment agent. The invention is used for the sewage treatment.

Description

Technical field: [0001] The invention relates to sewage treatment, in particular to a sewage treatment agent and its preparation method and its method for treating sewage. Background technique: [0002] For the treatment of steel mills, power plants and urban sewage, the technologies currently used include ferrous chloride or aluminum sulfate liquid for treatment, and the most commonly used ferrous sulfate or polyaluminum chloride liquid for treatment. The chemical requirements of the above-mentioned treatment agents for sewage The removal rate of oxygen (COD) and suspended solids (SS) is relatively low, generally no more than 20%. Invention content: [0003] The purpose of the present invention is to provide a kind of sewage treatment agent with high removal rate of COD and SS in sewage, its preparation method and its method for treating sewage. The technical solution of the present invention is a sewage treatment agent, which is characterized in that it is a polyaluminu...

Claims

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Application Information

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IPC IPC(8): C02F1/52
Inventor 乔占印
Owner 乔占印