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Slow-release carbon source material using sodium alginate as base material and preparation method thereof

A sodium alginate and slow-release carbon source technology, applied in the field of water treatment, can solve the problems of poor denitrification and denitrification effects, and achieve the effects of overcoming the decline in microbial metabolic function, strong operability, and simple process

Inactive Publication Date: 2012-07-18
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the problem of poor denitrification and denitrification effect caused by insufficient carbon source in sewage treatment plants, and provide a slow-release carbon source material based on sodium alginate and its preparation method

Method used

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  • Slow-release carbon source material using sodium alginate as base material and preparation method thereof
  • Slow-release carbon source material using sodium alginate as base material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0027] In this example, the preparation method of the slow-release carbon source material with sodium alginate as the base material is as follows: Weigh 16 g of sodium alginate and 20 g of starch and dissolve them in 400 mL of pure water to prepare a mixture containing 4% sodium alginate, A mixed solution of starch with a mass volume concentration of 5%, the mass ratio of sodium alginate to starch is 0.8:1, the above solution is heated to 40°C in a water bath and stirred at a speed of 200r / min, and mixed evenly to obtain a mixed solution, the above The mixed solution was cooled to room temperature. Add 20 g CaCl to 500 mL deionized water 2 , to obtain a mass volume concentration of 5% CaCl 2 Drop the above-mentioned cooled mixed solution into the cross-linking agent solution at a rate of 1 drop / s with a syringe, granulate into spherical particles with a particle size of 4-6 mm, and cross-link at 4°C for 24 hours Finally, after washing with pure water, the slow-release carbon...

Embodiment 2

[0030] In this example, the preparation method of the slow-release carbon source material based on sodium alginate is as follows: Weigh 24 g of sodium alginate and 20 g of starch and dissolve them in 400 mL of pure water to prepare a mixture containing 6% sodium alginate, A mixed solution of starch with a mass volume concentration of 5%, the mass ratio of sodium alginate and starch is 1.2:1, the above solution is heated to 35 °C in a water bath and stirred at a speed of 250 r / min, and mixed evenly to obtain a mixed solution, the above The mixed solution was cooled to room temperature. Add 8 g of CaCl to 500 mL of deionized water 2 , to obtain a mass volume concentration of 2% CaCl 2 Drop the above-mentioned cooled mixed solution into the cross-linking agent solution at a rate of 2 drops / s with a dropper, granulate into spherical particles with a particle size of 4-6mm, and cross-link at 3°C After 20 h, wash with pure water to obtain the slow-release carbon source material ba...

Embodiment 3

[0033]In this example, the preparation method of the slow-release carbon source material with sodium alginate as the base material is as follows: Weigh 32 g of sodium alginate and 20 g of starch and dissolve them in 400 mL of pure water to prepare a mixture containing 8% sodium alginate, A mixed solution of starch with a mass volume concentration of 5%, the mass ratio of sodium alginate to starch is 1.6:1, the above solution is heated to 45°C in a water bath and stirred at a speed of 300 r / min, and mixed evenly to obtain a mixed solution, the above The mixed solution was cooled to room temperature. Add 24 g CaCl to 500 mL deionized water 2 , to obtain a mass volume concentration of 6% CaCl 2 Drop the above-mentioned cooled mixed solution into the cross-linking agent solution at a rate of 3 drops / s with a dropper, granulate into spherical particles with a particle size of 4-6mm, and cross-link at 4°C After 30 h, wash with pure water to obtain the slow-release carbon source ma...

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Abstract

The invention discloses a slow-release carbon source material using sodium alginate as a base material and a preparation method of the slow-release carbon source material, and belongs to the technical field of water treatment. The slow-release carbon source material disclosed by the invention comprises the following ingredients in parts by weight: 5 parts of starch, 4 to 8 parts of sodium alginate and 2 to 6 parts of calcium chloride (CaCl2). According to the slow-release carbon source material, the sodium alginate is used as a carrier of a fixed carbon source, the starch is used as a carbon source, the materials are jointly dissolved in water to obtain mixed solution, CaCl2 solution is used as a crosslinking agent, the mixed solution is dripped into the crosslinking agent through an injector and is crosslinked for 20 to 30 hours in the crosslinking agent, and the slow-release carbon source material can be used through being cleaned by pure water. The slow-release carbon source material disclosed by the invention has the advantages that the carbon source can be slowly released, the carbon source is provided for the denitrification denitrifying process, the slow release places can also be provided for microorganisms, and the denitrifying effect is enhanced.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a slow-release carbon source material with sodium alginate as a base material and a preparation method thereof. Background technique [0002] Since most denitrifying bacteria are heterotrophs, they need to use carbon sources to grow and metabolize. However, water bodies polluted by nitrates and sewage treatment plants in southern cities in my country generally have insufficient carbon sources, which has become an important factor restricting the efficiency of biological nitrogen removal. In order to achieve the desired denitrification and denitrification effect, an external carbon source is needed to supplement the denitrification and denitrification electron donor. Traditional carbon sources are mainly liquid carbon sources such as low-molecular organic substances (such as methanol, ethanol, acetic acid) and sugar substances (such as glucose, sucrose), but t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30
Inventor 任洪强闫续耿金菊许柯郭瑞昕
Owner NANJING UNIV
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