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Floculant for treating sewage

A technology of sewage treatment and flocculant, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of wide application range, low flocculation speed and high operating cost

Inactive Publication Date: 2005-01-05
孙传斌
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the main method for treating industrial and domestic waste water is chemical flocculation and sedimentation. At present, the shortcomings of known chemical flocculants in practical applications are low flocculation speed, high operating costs, and wide application range.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] The weight composition of materials used for the preparation of high-efficiency flocculants for waste water treatment is:

[0074] 20 parts of polyacrylamide 16 parts of salt

[0075] Catalyst (1) 16.5 parts water 1000 parts

[0076] Among them, the catalyst (1) is the first formula, which consists of 8.5 parts of formaldehyde and 8 parts of dimethylamine, and the temperature is controlled at 38 ° C ±. If the temperature exceeds the temperature, use cold water to cool down or stop adding formaldehyde, and then add it after the temperature drops. After adding, Moisturizing at 40°C for 30-60 minutes is the finished product.

[0077] Preparation process: First, heat 1,000 parts of domestic water into the reactor to 30°C-40°C, add salt with a small amount of hot water to deepen it, add polyacrylamide slowly while stirring, after adding, gradually heat up, and keep stirring Make the polyacrylamide melt completely, control the temperature within 100°C, the optimum temperatu...

Embodiment 2

[0082] The weight composition of materials used for the preparation of high-efficiency flocculants for waste water treatment is;

[0083] 20 parts of polyacrylamide 16 parts of salt

[0084] Catalyst (1) 16.5 parts sulfuric acid or hydrochloric acid (note)

[0085] 1000 parts of water

[0086] Note: when using acid, according to the alkali pH value of the sewage, the amount to be adjusted according to the offset alkali value, in the preparation process, the input of the acid is not in any order; according to the actual application effect, acid or acid can be added to any formula in the present invention substance. (Except for the formula of Alkali, example actual example 5).

Embodiment 3

[0088] The weight composition of materials used for the preparation of high-efficiency flocculants for waste water treatment is;

[0089] 20 parts of polyacrylamide 15 parts of salt

[0090] Catalyst (1) 16.5 parts Aluminum sulfate 30-100 parts (note)

[0091] 1000 parts of water

[0092] Note: The amount of aluminum sulfate is determined by the test. The test is based on the PH and turbidity of the waste water and the COD removal rate. According to the needs of wastewater treatment, one or more aluminum salts and potassium can be used respectively. Salt, iron salt, chimney, etc.; the above-mentioned additives can also be added separately with this high-efficiency flocculant in the process of treating waste water. Water purifying agent to achieve the purpose of treatment.

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PUM

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Abstract

A flocculant for treating sewage is prepared from polyacrylamide (1-40 wt portions), NaCl (1-40), catalyst (5-35) and water (800-1500). The said catalyst is prepared from formaldehyde (10-90 wt. portions), dimethylamine (15-95) and ammonia solution (or urea) (1-80). Its advantages include high speed (1-5) seconds), siple equipment, low cost, and no secondary pollution.

Description

technical field [0001] The invention relates to a waste water treatment agent, in particular to a flocculant for waste water treatment. Background technique [0002] Improving the utilization rate of water, reducing the discharge of waste water and protecting the living environment of human beings is one of the important tasks of the governments of various countries today. In the prior art, the main method for treating industrial and domestic waste water is chemical flocculation and sedimentation. At present, the shortcomings of known chemical flocculants in practical application are low flocculation speed, high operating cost, and wide application range. Contents of the invention [0003] The object of the present invention is to provide a polymer flocculant for waste water treatment with low flocculation speed, high operation cost and wide application range. [0004] The object of the present invention can be realized b...

Claims

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Application Information

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IPC IPC(8): C02F1/56C08K3/10C08K5/04C08K5/07C08L79/02
Inventor 孙传斌林沛孙新孙峰徐振东
Owner 孙传斌
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