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Aeration-free waste water air floatation complexing agent and its preparation method, use method and use device

An applicator and composite agent technology, applied in chemical instruments and methods, food industry wastewater treatment, natural water treatment, etc., can solve the problem of high operating cost of the treatment process, achieve good floating effect, facilitate application and promotion, and reduce operating costs low effect

Active Publication Date: 2017-02-15
ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the wastewater treatment process, for the suspended particles in the wastewater, the large particles adopt flocculation and sedimentation, and for the small particles or substances with low quality, the method of adding coagulant, aeration and floating and then using scraper to separate is often used. Due to the limitation of coagulants, the existing technology requires continuous aeration, and the operating cost of the entire treatment process is relatively high, and a large part of the operating cost comes from the cost of the aerator. Therefore, it is necessary to develop a biogas that does not require aeration Liquid-air flotation compound agent and preparation, application method and device

Method used

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  • Aeration-free waste water air floatation complexing agent and its preparation method, use method and use device
  • Aeration-free waste water air floatation complexing agent and its preparation method, use method and use device
  • Aeration-free waste water air floatation complexing agent and its preparation method, use method and use device

Examples

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Embodiment 1

[0039] An aeration-free waste water air flotation composite agent, the composite agent includes, by mass fraction, coagulant, 20-50%, which includes iron salt, magnesium salt and polyaluminum chloride; cross-linking agent, 3-5%.

[0040] The cross-linking agent is water-soluble epoxy cross-linking agent or cross-linking agent EH or cationic water-soluble epoxy cross-linking agent EPTA.

[0041] The iron salt is ferric sulfate or ferric chloride or ferrous sulfate, and the magnesium salt is magnesium sulfate or magnesium chloride.

[0042] The coagulant also includes Mn ions and perchlorate.

Embodiment 2

[0044] In conjunction with Example 1, a method for preparing an aeration-free waste water air flotation composite agent, the preparation method includes the pretreatment of the coagulant, and the pretreatment includes the coagulant containing iron salt, magnesium salt and polyaluminum chloride, MnCl 2 and potassium perchlorate are dissolved in water, heated and stirred, and finally dried at 500 degrees Celsius to form powder.

Embodiment 1 and Embodiment 2

[0046] In combination with Example 1 and Example 2, an application method of an aeration-free waste water air flotation compound agent, the steps of the application method are as follows:

[0047] In the first step, the coagulant and crosslinking agent are dissolved in water respectively for later use;

[0048] In the second step, a coagulant is first added to the waste water to cause oxidation and coagulation reaction with the suspended particles in the waste water, and the injection amount of the coagulant is 0.25% of the waste water volume;

[0049] In the third step, a cross-linking agent is finally added to the waste water, and the injection amount of the cross-linking agent is 0.1% of the waste water, thereby forming loose flocs in the waste water;

[0050] In the fourth step, after the reaction, the solid flocs can float up without aeration, and then the floating solid flocs are subjected to solid-liquid separation.

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Abstract

The invention discloses an aeration-free waste water air floatation complexing agent and its preparation method, use method and use device and belongs to the technical field of waste water treatment. The complexing agent comprises, by mass, 20-50% a coagulant including an iron salt, a magnesium salt and polyaluminum chloride and 3-5% of a crosslinking agent. The use method comprises material preparation, coagulant addition, crosslinking agent addition and separation. The use device comprises a water pump, a first mixer, a buffer, a second mixer, a separation tank and an adjustment tank and the above parts are orderly communicated. The separation process is free of an aeration device so that the whole waste water treatment process has a low operation cost. The complexing agent has an advanced formula, good solid suspended particle floating effects and excellent solid-liquid separation effects. The whole device has a simple and reasonable design, is conducive to application and promotion and has a wide market prospect.

Description

technical field [0001] The invention relates to the technical field of waste water treatment, in particular to an aeration-free waste water air flotation composite agent, a preparation and application method and a device. Background technique [0002] In the process of wastewater treatment, for the suspended particles in the wastewater, the large particles adopt flocculation and sedimentation, and for the small particles or substances with low quality, the method of adding coagulant, aeration and floating and then using scraper to separate is often used. Due to the limitation of coagulants, the existing technology requires continuous aeration, and the operating cost of the entire treatment process is relatively high, and a large part of the operating cost comes from the cost of the aerator. Therefore, it is necessary to develop a biogas that does not require aeration Liquid-air flotation compound agent and preparation, application method and device. Contents of the inventi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F1/52C02F1/72C02F103/32
CPCC02F1/24C02F1/5236C02F1/72C02F9/00C02F2103/325
Inventor 张棋徐明飞朱晓明孙彩霞
Owner ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES
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