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Sewage treatment agent and usage method therefor

A technology for sewage treatment and sewage, which is applied in the direction of neutralization water/sewage treatment, flocculation/sedimentation water/sewage treatment, etc. It can solve the problems of many control points, large alkali consumption, and difficult control, so as to achieve easy operation and reduce The effect of consuming and shortening the process

Inactive Publication Date: 2015-11-11
TANGSHAN SANYOU GRP DONGGUANG PULP CO LTD
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Problems solved by technology

In the process of use, there are disadvantages such as long process flow, many control points, difficult control, large consumption of acid, hydrogen peroxide, ferrous iron and alkali, and there are also residual Fe in water due to short-term and large changes in pH. 3+ Unable to completely sink and remove the phenomenon of color reversion of the water body

Method used

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  • Sewage treatment agent and usage method therefor

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0015] See attached figure 1 , The sewage treatment reagent disclosed in the present invention includes a pre-reaction reagent and a post-stage flocculant. The chemical composition contained in the previous reaction reagent is H 2 SO 4 and FeSO 4 , Fe in this reagent 2+ and H + The mass ratio is 0.75-1.20. where Fe 2+ and H + The mass ratio depends on the PH value and COD concentration of the water to be treated. When PH=7.0-8.5: COD≤1000mg / L, Fe 2+ / H + =0.75; COD1000-2000mg / L, Fe 2+ / H + =0.8-1.1; COD≥2000mg / L, Fe 2+ / H + =1.20.

[0016] The chemical composition contained in the flocculant used in the later stage is SiO 2 , NaOH, PAM, the mass ratio of these three components is 3:2:1.

[0017] The usage method of this sewage treatment reagent is as follows.

[0018] a. Add the chemical components required by the pre-reaction reagents ...

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Abstract

Provided by the present invention is a sewage treatment agent. The sewage treatment agent comprises an early reaction agent and a late flocculant. The reaction agent contains chemical components of H2SO4 and FeSO4, wherein the mass ratio of Fe2+ to H+ in the agent is 0.75:1.20. The flocculant contains chemical components of SiO2, NaOH and PAM, wherein the mass ratio of SiO2 to NaOH to PAM is 3: 2: 1. The early reaction agent is added into an agent blending tank for blending. To-be-treated sewage reacts and then enters into a decoloring aeration tank; the treated water is aerated for 30-40 mins in the aeration tank; then, the flocculant is added; the treated sewage after the reaction enters into a final precipitation tank for such late reactions as precipitation; and precipitated mud is sent into a dewatering house and a supernatant liquid is discharged. By adding the agent disclosed by the invention, PH adjustment before treatment is performed simultaneously with the reaction agent, and PH adjustment after treatment is performed simultaneously with the flocculant. The sewage treatment agent and usage method provided by the invention have the advantages of shortening procedures, convenient operation and reducing consumption, and can meet different sewage treatment requirements.

Description

technical field [0001] The invention relates to the sewage treatment industry, in particular to a chemical reagent for realizing efficient sewage treatment and a method for using the sewage treatment reagent. Background technique [0002] At present, the Fenton method used in sewage treatment adopts the method of first adjusting the pH value of sewage, and then adding Fe 2+ , and finally add hydrogen peroxide to react, the reaction condition pH value is 3-3.5, and finally carry out pH callback to meet the national standard discharge requirements. In the process of use, there are disadvantages such as long process flow, many control points, difficult control, large consumption of acid, hydrogen peroxide, ferrous iron and alkali, and there are also residual Fe in water due to short-term and large changes in pH. 3+ The phenomenon of color reversion caused by water cannot be completely sank. Contents of the invention [0003] The present invention aims at many defects in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/66C02F1/52
Inventor 高庆光方振东张恒陈玉彬王忠学张聿武
Owner TANGSHAN SANYOU GRP DONGGUANG PULP CO LTD
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