Preparation method of slow-release carbon source filter material taking starch and polyvinyl alcohol as substrates

A polyvinyl alcohol and slow-release carbon source technology, which is applied in the field of water treatment, can solve problems such as excess and insufficient carbon sources, and achieve the effect of prolonging the service life and weakening the carbon release rate

Inactive Publication Date: 2014-08-06
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Low C/N treatment of raw water biological denitrification requires additional carbon source. In order to solve the problem of insufficient or excessive addition of trad

Method used

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  • Preparation method of slow-release carbon source filter material taking starch and polyvinyl alcohol as substrates
  • Preparation method of slow-release carbon source filter material taking starch and polyvinyl alcohol as substrates
  • Preparation method of slow-release carbon source filter material taking starch and polyvinyl alcohol as substrates

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Production of slow-release carbon source filter material:

[0050] In the internal carbon source, according to the ratio of starch acetate:PVA=1:1, weigh 10g and 10g respectively, put them into a beaker, and add 80mL of water and 1mL of SPAN80. Put the beaker in a water bath at 100°C, and stir the mixture in the cup until it is evenly blended and becomes a paste with a uniform texture. Pour the pasty liquid into a flat plate mold with a shallow groove, spread it flat, put it in a -7°C refrigerator and freeze it into blocks, and then thaw it at room temperature after freezing to form a jelly, and cut the jelly into 1-2cm 3 The pellets are then subjected to two "freezing-thawing" processes. Dry in an oven at 85°C to form a 0.3-0.5cm 3 The size of the pellets, ready to use.

[0051] In the external carbon source, according to the ratio of ordinary cornstarch:PVA=1:2, weigh 2g and 4g respectively, put them into a beaker, and add 34mL of water and 0.3mL of SPAN80. Put th...

Embodiment 2

[0058] Production of slow-release carbon source filter material:

[0059] In the internal carbon source, according to the ratio of starch acetate:PVA=2:1, weigh 10g and 5g respectively, put them into a beaker, and add 60mL of water and 0.75mL of SPAN80. Put the beaker in a water bath at 100°C, and stir the mixture in the cup until it is evenly blended and becomes a paste with a uniform texture. Pour the pasty liquid into a flat plate mold with a shallow groove, spread it flat, put it in a -7°C refrigerator and freeze it into blocks, and then thaw it at room temperature after freezing to form a jelly, and cut the jelly into 1-2cm 3 The pellets are then subjected to two "freezing-thawing" processes. Dry in an oven at 85°C to form a 0.3-0.5cm 3 The size of the pellets, ready to use.

[0060] In the external carbon source, according to the ratio of ordinary cornstarch:PVA=1:2, weigh 2g and 4g respectively, put them into a beaker, and add 34mL of water and 0.3mL of SPAN80. Put ...

Embodiment 3

[0067] Production of slow-release carbon source filter material:

[0068] In the internal carbon source, according to the ratio of starch acetate:PVA=3:1, weigh 15g and 5g respectively, put them into a beaker, and add 80mL of water and 1mL of SPAN80. Put the beaker in a water bath at 100°C, and stir the mixture in the cup until it is evenly blended and becomes a paste with a uniform texture. Pour the pasty liquid into a flat plate mold with a shallow groove, spread it flat, put it in a -7°C refrigerator and freeze it into blocks, and then thaw it at room temperature after freezing to form a jelly, and cut the jelly into 1-2cm 3 The pellets are then subjected to two "freezing-thawing" processes. Dry in an oven at 85°C to form a 0.3-0.5cm 3 The size of the pellets, ready to use.

[0069] In the external carbon source, according to the ratio of ordinary cornstarch:PVA=1:2, weigh 2g and 4g respectively, put them into a beaker, and add 34mL of water and 0.3mL of SPAN80. Put the...

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Abstract

The invention discloses a preparation method of a slow-release carbon source filter material taking starch and polyvinyl alcohol as substrates, is applied to one-time adding of carbon sources for biological denitrification of raw water with a low carbon nitrogen ratio, and belongs to the technical field of water treatment. The preparation method of the filter material comprises steps as follows: (1), starch acetate, an emulsifying agent and polyvinyl alcohol are uniformly blended in hot water, cooled, cut and dried into solid grains, and the solid grains are taken as internal carbon sources for standby; (2), ordinary corn starch, an emulsifying agent and polyvinyl alcohol are uniformly blended in hot water, sulfur powder and the internal carbon source grains are added, the internal carbon sources are secondarily packaged and injected into a mold for cooling forming; (3), the packaged carbon source filter material is put into a boric acid solution for soaking, surface crosslinking is performed, and then the material is dried and washed for standby. The prepared slow-release carbon source filter material meets requirements of mechanical strength, carbon release rate, carbon source quality and long use period, and stable carbon sources and growth and metabolism occasions are provided for microorganism denitrification.

Description

technical field [0001] The invention relates to a preparation method of a slow-release carbon source filter material with two kinds of starch and polyvinyl alcohol (PVA) as the base material, which is applicable to biological The invention relates to one-time dosing of a carbon source for denitrification and denitrification, and belongs to the technical field of water treatment. Background technique [0002] At present, the key problem of the shortage of raw water carbon source is involved in the use of biological denitrification and denitrification process in the recycling of sewage, the restoration of nitrate pollution in groundwater and the treatment of lake water pollution, which has become a constraint to the development of such water treatment projects. Key factor. In actual engineering, in order to obtain the ideal effect of biological denitrification denitrification, the method of adding small molecule carbon source is often adopted to supplement the electron donor ...

Claims

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Application Information

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IPC IPC(8): C02F3/00C02F101/16
Inventor 郝瑞霞王润众王建超赵文莉任晓克徐鹏程徐忠强张娅
Owner BEIJING UNIV OF TECH
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