Efficient composite carbon source for denitrification treatment of low-carbon-nitrogen-ratio wastewater and preparation method thereof

A low-carbon-to-nitrogen ratio and composite carbon source technology, applied in the field of water treatment, can solve the problems of not being able to meet the nutritional needs of microorganisms at the same time, increase operation and maintenance costs, etc., to maintain bacterial diversity, improve growth rate and carbon source. The rate of substrate utilization and the effect of regulating cell growth

Inactive Publication Date: 2021-02-09
JIANGSU LASON CHEM ENVIRONMENTAL PROTECTION
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The most commonly used external carbon sources in biological denitrification are single carbon sources such as methanol, ethanol, and acetic acid. However, the microorganisms in wastewater denitrification treatment are of various types and are in different growth stages. Supplementing a single carbon source cannot satisfy the needs of microorganisms in all stages at the same time. Nutritional needs; in addition, multiple sets of feeding equipment are required in the existing technology, which increases the cost of operation and maintenance

Method used

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  • Efficient composite carbon source for denitrification treatment of low-carbon-nitrogen-ratio wastewater and preparation method thereof
  • Efficient composite carbon source for denitrification treatment of low-carbon-nitrogen-ratio wastewater and preparation method thereof

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Effect test

Embodiment 1

[0026] A high-efficiency composite biological carbon source agent for wastewater denitrification treatment, the high-efficiency composite biological carbon source agent is made of the following components in weight ratio: 25% glucose, 3% molasses, 3% sodium citrate, 10% glycerine Alcohol, 3% sodium formate, 4% sodium acetate, 1% potassium dihydrogen phosphate, 0.5% sodium dihydrogen phosphate, 0.2% zinc sulfate, 0.3% manganese sulfate, 0.2% biotin, 0.3% niacin, 49.5% water.

[0027] The denitrification influent and the sludge in a sewage treatment plant were taken for denitrification and denitrification experiments. Glucose, sodium citrate and glycerin were used as single carbon sources for comparison. Oxygen dosage is used. Except for the addition of different carbon sources, the test was carried out under the same conditions, and the total nitrogen in the effluent was used as a reference for carbon source evaluation.

[0028] The total nitrogen in the influent was 104.5mg / L...

Embodiment 2

[0030] A high-efficiency composite biological carbon source agent for wastewater denitrification treatment, the high-efficiency composite biological carbon source agent is made of the following components in weight ratio: 20% glucose, 4% molasses, 3% sodium citrate, 15% glycerine Alcohol, 3% sodium formate, 5% sodium acetate, 0.5% potassium dihydrogen phosphate, 0.5% dipotassium hydrogen phosphate, 1% sodium dihydrogen phosphate, 0.3% ammonium molybdate, 0.5% manganese sulfate, 0.2% copper sulfate, 0.2% Pyrimidine, 0.3% Biotin, 0.5% L-Glutamic Acid, 46% Water.

[0031] The denitrification influent and the sludge in a sewage treatment plant were taken for denitrification and denitrification experiments. Glucose, sodium citrate and glycerin were used as single carbon sources for comparison. Oxygen dosage is used. Except for the addition of different carbon sources, the test was carried out under the same conditions, and the total nitrogen in the effluent was used as a reference...

Embodiment 3

[0034] A high-efficiency composite biological carbon source agent for wastewater denitrification treatment, the high-efficiency composite biological carbon source agent is made of the following components in weight ratio: 15% glucose, 5% molasses, 5% sodium citrate, 20% glycerine Alcohol, 5% sodium formate, 8% sodium acetate, 1% trisodium phosphate, 1% potassium dihydrogen phosphate, 0.2% zinc sulfate, 0.3% manganese sulfate, 0.2% purine, 0.3% niacin, 1% L-glutamic acid , 38% water.

[0035] Take the denitrification influent and the sludge in the tank of a sewage treatment plant to conduct denitrification and denitrification experiments, and conduct denitrification and denitrification experiments in 4 devices. Add the prepared raw water and sludge mixture into the device respectively, and add the carbon source with the same amount of chemical oxygen demand. The following carbon source compositions added correspond to the device numbers one by one:

[0036] The composition of...

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Abstract

The invention discloses an efficient composite carbon source for denitrification treatment of low-carbon-nitrogen-ratio wastewater and a preparation method thereof, and belongs to the field of water treatment. The preparation is prepared from, by weight, 10-25% of glucose, 3-5% of molasses, 1-5% of sodium citrate, 10-20% of glycerol, 3-5% of sodium formate, 3-8% of sodium acetate, 1-3% of inorganic phosphorus salt, 0.5-1% of microelements, 0.5-2% of growth factors and the balance water; the composite biological carbon source preparation disclosed by the invention can meet the nutrition required by microorganisms in different growth stages in a microbiota, realizes efficient denitrification of wastewater, and can improve the growth rate of the microbiota and the utilization rate of a carbonsource matrix by adding inorganic phosphorus salt, trace elements, growth factors and the like according to the quality of the wastewater, thereby further improving the biological denitrification efficiency.

Description

technical field [0001] The invention belongs to the field of water treatment, and relates to a high-efficiency composite carbon source medicament for wastewater treatment and a preparation method thereof, in particular to a high-efficiency composite carbon source medicament for low carbon-to-nitrogen ratio wastewater treatment and a preparation method thereof. Background technique [0002] At present, the carbon-to-nitrogen ratio of the effluent of most sewage plants after biological treatment in my country is low, and the effluent still contains 70-80% nitrate nitrogen. There is a common problem of insufficient carbon sources for denitrification. Denitrification requires carbon sources for production capacity and cell synthesis. Insufficient carbon source is an important factor restricting the efficiency of biological nitrogen removal. [0003] The most commonly used external carbon sources in biological denitrification are single carbon sources such as methanol, ethanol, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34C02F101/16
CPCC02F3/342C02F3/34C02F2305/06C02F2101/16
Inventor 赵振华邵汝英高峰王帅王蔡华蒋伟群
Owner JIANGSU LASON CHEM ENVIRONMENTAL PROTECTION
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