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Treatment method of phosphorus-containing waste water

A treatment method and technology for wastewater, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc. Emission standard treatment methods and other issues, to achieve the effect of convenient operation and simple process

Active Publication Date: 2011-08-03
李开明
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AI Technical Summary

Problems solved by technology

For phosphorus-containing wastewater in the form of non-orthophosphate, the simple direct precipitation method is difficult to achieve the treatment effect, which puts forward higher requirements for the treatment process of phosphorus-containing wastewater. At present, there is no high-level industrial application that meets this requirement. Disposal method of phosphorus-containing wastewater discharge standard

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Embodiment 1

[0024] The acetylene gas clean wastewater produced by the calcium carbide method PVC production process is used as the treated water. After the wastewater is homogenized in the water quality adjustment tank, it enters the oxidation tank, and the oxidant is added (the oxidant can be hydrogen peroxide, Fenton’s reagent, perchloric acid, hypochlorous acid) , nitric acid, aqua regia, ozone and corresponding salt compounds and peroxides or a mixed solution), the mass ratio of oxidant to treated water is between 1-3:1000; the pH value is controlled to be acidic ( pH can be between 3-6), stirred for 150 minutes. Add coagulant, the coagulant can be one of calcium hydroxide, aluminum sulfate, ferrous sulfate, ferric chloride or a mixed solution, the mass ratio of coagulant solution to treated water is 3:1000, Adjust the pH value to be alkaline (pH can be between 7-9), aerate and stir for 15 minutes, then add coagulant aid (such as polyacrylamide solution, PAM), the mass ratio of PAM so...

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Abstract

The invention relates to a treatment method of phosphorus-containing waste water, comprising the following steps of: (1) adding an oxidizer to the phosphorus-containing waste water to regulate pH to be acidic, stirring for oxidation; (2) adding a coagulant to oxidized treating water, regulating the pH to be alkaline, stirring, wherein the coagulant is a composite reagent comprising ferrum, aluminum, calcium and ferrum, aluminum and calcium ions, and the mass ratio of the ferrum to the aluminum to the calcium is (1-2):(0-2):(0-1); (3) adding a coagulant aid solution to the treating water subjected to coagulation reaction, stirring, and participating outflow water; and (4) absorbing and filtering the participated outflow water, and then discharging. The invention can effectively remove the phosphorus-containing compounds contained in the waste water and reduce the turbidity of the outflow water, has the characteristics of simple process flow, high treatment efficiency, and the like and is one of effective methods for treating the phosphorus-containing waste water and especially treating the phosphorus-containing waste water with a non-orthophosphate form.

Description

technical field [0001] The invention relates to a method for treating high-concentration phosphorus-containing wastewater, in particular to a method for treating phosphorus-containing wastewater in the form of non-orthophosphate. Background technique [0002] The concentration of total phosphorus is one of the most critical factors for water eutrophication. The total phosphorus content is greater than 20ug / L, which means water eutrophication. The standard GB8978-96 stipulates that the allowable discharge concentration of total phosphorus in the primary standard is 0.5mg / L, and the allowable discharge concentration of the secondary standard is 1.0mg / L. [0003] In order to prevent eutrophication of water bodies, my country has put forward higher and higher requirements for the discharge water quality of various industries. Most enterprises have implemented the first-level standard in the comprehensive sewage discharge standard, that is, the allowable discharge concentration o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04
Inventor 李开明
Owner 李开明
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