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Activated metal salt flocculant and process for producing same

A technology of active metals and manufacturing methods, applied in separation methods, chemical instruments and methods, metallurgical wastewater treatment, etc., can solve the problems of anaerobic bacteria death, poor ability to remove dissolved organic matter, and inability to use anaerobic bacteria treatment, etc. , to achieve strong cohesion and improve performance

Inactive Publication Date: 2011-02-09
YAMAGUCHI UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, the metal salt coagulants that have been used in the past have the following disadvantages due to their poor ability to remove dissolved organic matter. Therefore, for sewage with a lot of dissolved organic matter, it has the following disadvantages: it must be processed by using a large amount of coagulant or by Reprocessing to decompose organic matter etc.
[0012] Another problem is that when using the above-mentioned metal salt-based coagulants, especially those containing chlorine, there is the disadvantage that it often occurs that in the case of treatment with the above-mentioned electrolysis, for example in the treatment of agricultural wastewater, etc. It often happens that the treatment with anaerobic bacteria cannot be carried out (the anaerobic bacteria die) after the frequent coagulant treatment

Method used

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  • Activated metal salt flocculant and process for producing same
  • Activated metal salt flocculant and process for producing same
  • Activated metal salt flocculant and process for producing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] The following apparatus was used as an electrolysis apparatus.

[0085] An electrolytic cell was used in which platinum wires were installed as electrodes (diameter 0.3 mm, length 12.5 mm (effective length 40 mm), distance between electrodes 13 mm) in a cylindrical glass container with an inner diameter of 18 mm and a height of 50 mm.

[0086] The electrolytic treatment conditions are as follows:

[0087] Applied voltage DC 45V (below)

[0088] Current value 30mA (constant current control)

[0089] Water temperature 23°C

[0090] Processing time 90 minutes

[0091] Electricity 16 coulomb / g

[0092] Add 10mL polyaluminum chloride (PAC: [Al 2 (OH) n Cl 16-n ] m ) (n=1 to 5, m≦10) (manufactured by Hokkaido Soda Co., Ltd.) was energized and electrolytically treated to obtain activated PAC as an activated metal salt flocculant.

[0093] 1 mL of the above-obtained activated PAC was mixed with 1 mL of water as a sample. In addition, the PAC which was not electrolyzed...

Embodiment 2

[0099] The same test as in Example 1 was carried out using an aqueous solution of albumin (concentration: 50 μM) instead of the aqueous solution of globulin. In addition, the same experiment was performed on PAC which was not electrolytically treated, and this was defined as Comparative Example 2. The result is as figure 2 shown. exist figure 2 Among them, C1~C7 are the results of Comparative Example 2, and D1~D7 are the results of Example 2, respectively showing the results after standing for 0 minutes, 5 minutes, 10 minutes, 30 minutes, 60 minutes, 90 minutes and 120 minutes. result.

[0100] In Comparative Example 2, the PSI sample was added to the albumin aqueous solution in the beaker and stirred, and immediately became cloudy, but precipitates aggregated immediately after standing, and the solution became transparent (C1). Thereafter, no change in the aggregates at the bottom of the beaker was observed, but 30 minutes later, aggregates floated on the water surface....

Embodiment 3

[0108] Investigate the relationship between electrolytic processing and absorption spectra.

[0109]Same as Example 1, carry out electrolytic treatment to polyaluminum chloride, before electrolytic treatment starts, after electrolytic treatment starts 5 minutes, after electrolytic treatment starts 10 minutes, and afterwards every 10 minutes take sample, until 90 minutes, with automatic The absorption spectrum was measured with a recording spectrophotometer (manufactured by Hitachi, Ltd.: U-3500). The result is as image 3 shown.

[0110] like image 3 It can be seen that, if electrolytic treatment is performed, the absorbance increases in the entire ultraviolet-visible light region, but as the electrolytic treatment time increases, light absorption bands appear around 5.2-5.4eV and 4.0-4.2eV.

[0111] Subtract the initial absorption spectrum from the absorption spectrum of PAC treated at each treatment time above to obtain the light absorption increase component changed by ...

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PUM

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Abstract

Disclosed is an activated metal salt flocculant in which the flocculation activity of a metal salt flocculant is significantly improved. The activated metal salt flocculant is produced by electrolyzing a metal salt flocculant or an aqueous solution containing the metal salt flocculant.

Description

technical field [0001] The invention relates to a coagulant used for purification of clean water, discharge water, industrial waste water, agricultural waste water and other sewage. In particular, it relates to an active coagulant having remarkable effects on sewage containing water-soluble and colloidal organic matter and a production method thereof. Background technique [0002] For the purification of discharge water (the discharge water refers to agricultural wastewater, industrial wastewater, and household wastewater containing floating turbidity and water-soluble removal target substances) or source water as drinking water (in this specification, they are collectively referred to as For the purification of sewage), there are the following methods: suspended solids and dissolved impurities can be removed by physical and chemical methods such as filtration separation treatment, adsorption separation treatment, coagulation sedimentation treatment, coagulation flotation tr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/56C02F1/52B01D21/01C01F7/57
CPCC02F1/463C01F7/56C02F2103/10C02F2103/20C02F2103/16C02F2103/28C01F7/57B01D21/01
Inventor 三木俊克村田卓也深石准
Owner YAMAGUCHI UNIV
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