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Efficient composite carbon source agent and preparation method thereof

A composite carbon source and high-efficiency technology, applied in chemical instruments and methods, water treatment parameter control, special compound water treatment, etc., can solve the problems of nitrite nitrogen accumulation, affecting effluent water quality, slow response time, etc., and achieve denitrification Fast speed, meet the water quality discharge requirements, and adapt to the effect of fast

Inactive Publication Date: 2020-04-17
宁夏中宁县兴日晟环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When methanol is used as a carbon source, the cost is relatively high, the response time is slow, and it has certain poisonous effects. When it is used for emergency dosing in sewage plants, the effect is not good, and the denitrification rate of ethanol is not as good as methanol and sodium acetate glucose as an external carbon source. Yes, but as a multi-molecular compound, it is easy to cause a large number of bacteria to multiply, leading to sludge bulking, increasing effluent, and affecting effluent water quality. Compared with alcohol carbon sources, glucose is more likely to produce nitrite nitrogen accumulation. Phenomena, therefore, it is not recommended to use a large amount of glucose as the external carbon source. The advantage of sodium acetate is that it can immediately respond to the denitrification process and can be used for emergency treatment during water plant operation. Because it is a small molecule organic acid, denitrifying bacteria It is easy to use, and the denitrification effect is the best, but due to the high price and high sludge yield, and the sludge disposal problem in sewage plants is also a big problem, so sodium acetate is used in large-scale sewage plants Dosing is almost impossible

Method used

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  • Efficient composite carbon source agent and preparation method thereof
  • Efficient composite carbon source agent and preparation method thereof
  • Efficient composite carbon source agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A high-efficiency composite carbon source agent for wastewater treatment, which includes the following components in mass fractions: 4.5% sodium acetate, 40% carbohydrates, 1% methanol, and the rest is water.

[0027] The above-mentioned medicament is prepared by the following method:

[0028] S1. Put the sodium acetate solution and the methanol solution into the reaction kettle in turn, slowly add the sodium hydroxide solution in stages, and add water to the rest;

[0029] S2. Start stirring, after stirring for half an hour, control the temperature to 65°C and pH to 6.5, stop adding sodium hydroxide solution, then slowly add carbohydrates for aging, continue stirring until COD reaches 250,000 mg / L, filter to obtain composite carbon source medicine.

Embodiment 2

[0031] A high-efficiency composite carbon source agent for wastewater treatment, which includes the following components in mass fractions: 5.5% sodium acetate, 50% carbohydrates, 3% methanol, and the rest is water.

[0032] The above-mentioned medicament is prepared by the following method:

[0033] S1. Put the sodium acetate solution and the methanol solution into the reaction kettle in turn, slowly add the sodium hydroxide solution in stages, and add water to the rest;

[0034] S2. Start stirring, after stirring for half an hour, control the temperature to 75°C and pH to 7.5, stop adding sodium hydroxide solution, then slowly add carbohydrates for aging, continue stirring until the COD reaches 450,000 mg / L, filter to obtain composite carbon source medicine.

Embodiment 3

[0036] A high-efficiency composite carbon source agent for wastewater treatment, which includes the following components in mass fractions: 5% sodium acetate, 45% carbohydrates, 2% methanol, and the rest is water.

[0037] The above-mentioned medicament is prepared by the following method:

[0038] S1. Put the sodium acetate solution and the methanol solution into the reaction kettle in turn, slowly add the sodium hydroxide solution in stages, and add water to the rest;

[0039] S2. Start stirring, and after stirring for half an hour, control the temperature to 70°C and pH to 7, stop adding sodium hydroxide solution, then slowly add carbohydrates for aging, continue stirring until COD reaches 350,000 mg / L, filter to obtain composite carbon source medicine.

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Abstract

The invention discloses an efficient composite carbon source agent for wastewater treatment. The efficient composite carbon source agent comprises the following components in percentage by mass: 4.5-5.5% of sodium acetate, 40-50% of carbohydrates, 1-3% of methanol and the balance of water. According to the invention, the requirements of the market on high-quality and high-efficiency water treatment chemicals can be met; and the efficient biological composite carbon source can effectively provide enough carbon source for biological flora in a biochemical system, and can ensure the safety of theuse process.

Description

technical field [0001] The invention relates to a high-efficiency composite carbon source agent and a preparation method thereof. Background technique [0002] With the increasing prosperity and development of industry, the composition of sewage is becoming more and more complex. The original physical and chemical methods are far from meeting the needs of sewage treatment. In recent years, biochemical treatment has been applied to many sewage treatment fields. Small energy, high efficiency, low cost, and simple operation are favored. At present, most sewage denitrification processes use single carbon source organic substances (such as methanol, ethanol, acetic acid, sodium acetate, glycerol, etc.) and sugar substances (glucose, sucrose, xylose, etc.) as a liquid carbon source. [0003] At present, a series of studies have been carried out on the types and amounts of external carbon sources added at home and abroad, and it is found that different external carbon sources have...

Claims

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Application Information

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IPC IPC(8): C02F3/34
CPCC02F3/34C02F2209/08C02F2305/06
Inventor 刘洋乔雪梅熊瑞佳
Owner 宁夏中宁县兴日晟环保科技有限公司
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