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Preparation method of composite phosphorus removing agent for sewage treatment

A compound phosphorus removal agent and sewage treatment technology, which is applied in water/sewage treatment, adsorbed water/sewage treatment, water/sludge/sewage treatment, etc. Insufficient, poor phosphorus removal effect, etc., to achieve the effect of improving phosphorus removal effect, strong complex adsorption performance, and strong specific surface area

Inactive Publication Date: 2018-07-24
TIANJIN HUANCHUANG TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, commercial chemical phosphorus removal agents on the market mainly include polyaluminum chloride, polyferric sulfate, and polyaluminum ferric chloride. Since the aluminum and iron contained in them mainly exist in a polymerized state rather than an ionic state, they interact with phosphorus-containing compounds in sewage. Insufficient, large dosage, poor phosphorus removal effect, high cost of phosphorus removal
When pre-dosing, there is no synergistic COD removal effect, which seriously restricts the promotion and application of chemical phosphorus removal technology

Method used

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  • Preparation method of composite phosphorus removing agent for sewage treatment
  • Preparation method of composite phosphorus removing agent for sewage treatment
  • Preparation method of composite phosphorus removing agent for sewage treatment

Examples

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Effect test

Embodiment 1

[0013] Embodiment 1: the preparation method of composite type dephosphorization agent

[0014] To prepare 150kg compound phosphorus removal agent, the steps are as follows:

[0015] S1 Weighing: Weigh 17kg Fe respectively 2 (SO 4 ) 3 , 15kgAlCl 3 ·6H 2 0, 6kg sodium hypochlorite, 2kg sodium chlorate, 3kg potassium permanganate and 1kg molecular weight are 200-15 million polyacrylamide, measure 106 liters of water in addition;

[0016] S2 feed: the Fe 2 (SO 4 ) 3 and AlCl 3 ·6H 2 0, be placed in the reactor, add water in the reactor, stir while adding, make compound dissolve, obtain ferric sulfate-aluminum chloride liquid; Add sodium hypochlorite, sodium chlorate, potassium permanganate successively, stir to dissolve;

[0017] S3 mixing: adding polyacrylamide to the mixed solution prepared in the above steps;

[0018] S4 emulsification: Start the machine and stir for 2-3 hours to prepare a mixed liquid of the compound phosphorus removal agent.

[0019] In order to f...

Embodiment 2

[0027] Embodiment 2: the application of composite phosphorus removal agent

[0028] a. When dosing at the front of the sewage treatment plant, the dosages of ferric sulfate, aluminum trichloride, sodium hypochlorite, sodium chlorate and potassium permanganate are 80-170g and 70-150g respectively in each cubic meter of sewage. 20-60g, 5-20g, 5-30g.

[0029] b. When dosing after the sewage treatment plant, the dosages of ferric sulfate, aluminum trichloride, sodium hypochlorite, sodium chlorate and potassium permanganate are 80-170kg and 70-150kg respectively in each cubic meter of sewage. 20-60kg, 5-20kg, 1-5g.

[0030] The dosing components in the two cases are the same, and the difference lies in the quality of potassium permanganate in the agent A. Therefore, a compound phosphorus removal agent containing a higher concentration (a) of potassium permanganate is prepared for pre-dosing of sewage treatment; a compound phosphorus removal agent containing a lower concentration ...

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Abstract

The invention relates to a preparation method of a composite phosphorus removing agent for sewage treatment. The composite phosphorus removing agent is prepared from a reagent A and a reagent B. A preparation method of the reagent A comprises the following steps of putting Fe2(SO4)3 solids and AlCl3.6H2O with the mass ratio being (2.5 to 1.1)-(1.0 to 2.5) in a reactor, and adding water in the reactor with the mass ratio of the water and a mixture in the reactor being (2 to 1)-(5 to 1) to enable the mixture to be dissolved to obtain ferric sulfate-aluminium chloride liquid; and sequentially adding a certain quantities of sodium hypochlorite, sodium chlorate and potassium permanganate, and performing uniform mixing. A preparation method of the reagent B comprises the following step of dissolving one or more of polyacrylamide and poly-dimethyl-diallyl-ammonium chloride into water to prepare 0.05-1 percent solution. The composite phosphorus removing agent prepared by the preparation methodhas the characteristics of good phosphorus removal effect, both removal of COD and SS and the like, can be widely used for the fields of black and odorous water body treatment, industrial wastewatertreatment, domestic sewage deep treatment and the like, is simple to operate and is suitable for popularization.

Description

technical field [0001] The invention relates to the technical field of advanced treatment of sewage in environmental protection, in particular to a preparation method of a composite dephosphorization agent for sewage treatment. Background technique [0002] Phosphorus and nitrogen fertilizers are widely used in agricultural production in my country, and urban residents use a large amount of phosphorus-containing washing powder to wash clothes, resulting in a total phosphorus content of 5-20 mg / L in domestic and production sewage. Nitrogen and phosphorus are biological nutrients. If not controlled, It can cause eutrophication of water body, lead to algae outbreak, cause foul smell and bad appearance in water body, and seriously affect the quality of water environment. [0003] In order to effectively reduce the content of nitrogen and phosphorus in wastewater, sewage treatment plants usually use biotechnology. Biological nitrogen and phosphorus removal has the characteristics...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F1/56C02F1/28C02F101/10
CPCC02F1/281C02F1/5236C02F1/56C02F2101/105
Inventor 侯锋邵彦青庞洪涛卢先春张术宝曹效鑫周晓
Owner TIANJIN HUANCHUANG TECH DEV CO LTD
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