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Polyethylene glycol-containing composite carbon source for biological denitrification of sewage, and preparation method thereof

A polyethylene glycol and composite carbon source technology, applied in chemical instruments and methods, water/sludge/sewage treatment, special compound water treatment, etc.

Pending Publication Date: 2021-11-19
南京苏楻生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the microorganisms in the activated sludge age, they will also dissolve certain organic matter. Relevant scholars have studied this organic matter as a carbon source and found that the denitrification rate of this product is only 15%. Carbon sources are still in the research phase

Method used

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  • Polyethylene glycol-containing composite carbon source for biological denitrification of sewage, and preparation method thereof

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Effect test

Embodiment 1

[0023] This embodiment provides a polyethylene glycol-containing composite carbon source for biological denitrification of sewage. The composite carbon source includes, in parts by mass: polyethylene glycol 600: 15%, glycerol: 15%, glucose: 10%, cane molasses: 25%, sodium acetate: 5%, calcium acetate: 1%, fungicide: 0.5%, defoamer: 0.2%, the balance is water, the sum of the above components is 100%.

[0024] The preparation method of the above-mentioned polyethylene glycol-containing sewage biological denitrification composite carbon source specifically comprises the following steps:

[0025] (1) Dissolve 10% glucose, 5% sodium acetate, and 1% calcium acetate in 28.3% water respectively according to the mass ratio, mix well and stir well;

[0026] (2) 15% glycerol, 25% cane molasses, 15% polyethylene glycol 600, 0.5% bactericide and 0.2% defoamer are added to step (1) in sequence according to the mass ratio, and the stirring temperature is 20°C , the stirring time is 30 minut...

Embodiment 2

[0028] This embodiment provides a polyethylene glycol-containing composite carbon source for biological denitrification of sewage, the composite carbon source includes, in parts by mass: polyethylene glycol 600: 10%, ethylene glycol: 10%, glucose: 20%, beet molasses: 20%, sodium acetate: 10%, calcium acetate: 3%, bactericide: 0.2%, defoamer: 0.1%, the balance is water, the sum of the above components is 100%.

[0029] The preparation method of the above-mentioned polyethylene glycol-containing sewage biological denitrification composite carbon source specifically comprises the following steps:

[0030] (1) Dissolve 20% glucose, 10% sodium acetate, and 3% calcium acetate in 26.7% water respectively according to the mass ratio, mix well and stir well;

[0031](2) 10% ethylene glycol, 20% beet molasses, 10% polyethylene glycol 600, 0.2% bactericide and 0.1% defoamer are added in step 1 successively according to mass ratio, and stirring temperature is between 40 ℃ , the stirring ...

Embodiment 3

[0033] This embodiment provides a polyethylene glycol-containing composite carbon source for biological denitrification of sewage. The composite carbon source includes, in parts by mass: polyethylene glycol 600: 15%, glycerol: 10%, glucose: 10%, cane molasses: 20%, sodium acetate: 5%, calcium acetate: 1%, bactericide: 0.5%, defoamer: 0.2%, the balance is water, the sum of the above components is 100%.

[0034] The preparation method of the above-mentioned polyethylene glycol-containing sewage biological denitrification composite carbon source specifically comprises the following steps:

[0035] (1) Dissolve 10% glucose, 5% sodium acetate, and 1% calcium acetate in 28.3% water respectively according to the mass ratio, mix well and stir well;

[0036] (2) 10% glycerol, 20% sugar cane molasses, 15% polyethylene glycol 600, 0.5% bactericide and 0.2% defoamer are added in step 1 successively according to mass ratio, and stirring temperature is between 20 ℃ , the stirring time is 3...

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Abstract

The invention discloses a polyethylene glycol-containing composite carbon source for biological denitrification of sewage. The composite carbon source comprises, by mass, 10-15% of polyethylene glycol, 10-15% of polyol, 10-20% of glucose, 20-25% of molasses, 5-10% of sodium acetate, 1-3% of calcium acetate, 0.2-0.5% of bactericide, 0.1-0.2% of defoaming agent, and the balance of water, and the sum of the components is 100%. The invention also relates to a preparation method of the polyethylene glycol-containing composite carbon source for biological denitrification of sewage.The composite carbon source can meet the nutrition required by microorganisms in different growth stages in microbiota, and high-efficiency denitrification of wastewater is realized, so that the problems of insufficient carbon source in low-temperature seasons and high nitrogen removal efficiency in the prior art are solved. The technical problems that the price of a carbon source is high, and long-term addition of a single carbon source affects bacterial microorganisms in a denitrification section and structural diversity of denitrifying bacterial communities. The composite carbon source is free of harmful substances, low in price and capable of overcoming the defects of existing carbon sources.

Description

technical field [0001] The invention relates to a polyethylene glycol-containing composite carbon source for biological denitrification of sewage and a preparation method thereof. The composite carbon source is mainly used as a supplementary carbon source for biological denitrification of sewage with a low C / N ratio, and belongs to the technical field of water treatment. . Background technique [0002] With the rapid economic development and the continuous improvement of people's living standards, the discharge of urban sewage has gradually increased, and the water pollution has become increasingly serious. A large amount of untreated sewage is discharged into the river, resulting in COD, NH in the water body 3 -N, TP and other pollutants are seriously exceeding the standard, which are easy to cause eutrophication of water bodies and lead to the occurrence of black and odorous water bodies in rivers, and damage the water environment and ecosystem. The eutrophication problem...

Claims

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Application Information

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IPC IPC(8): C02F3/28
CPCC02F3/28C02F2305/06
Inventor 史传叶黄琼时红兵徐德福陈凯
Owner 南京苏楻生物科技有限公司
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