Compound carbon source agent for wastewater treatment

A technology of compound carbon sources and chemicals, applied in the field of water treatment, can solve the problems of lower denitrification rate than methanol and sodium acetate, increase effluent COD, affect effluent quality, etc., so as to reduce treatment costs and sewage volume, and adapt to sludge bacteria species. Fast, low sludge yield

Inactive Publication Date: 2018-11-30
YIXING HEDA WATER SOLUTION
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 toxic effects. When it is used for emergency dosing in sewage plants, the effect is not good; the denitrification rate of ethanol is not as good as methanol and sodium acetate; glucose is used as an external carbon source. The treatment effect is good, but as a multi-molecular compound, it is easy to cause a large number of bacteria to multiply, leading to sludge bulking, increasing COD of effluent, and affecting the quality of effluent water. Compared with alcohol carbon sources, glucose is more likely to produce nitrous state The phenomenon of nitrogen accumulation, so it is not recommended to use a large amount of glucose as an external carbon source; the advantage of sodium acetate is that it can respond to the denitrification process immediately, and can be used for emergency treatment during water plant operation, because it is a small molecule organic acid , denitrifying bacteria are 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 sewage Large-scale dosing of the plant is almost impossible

Method used

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  • Compound carbon source agent for wastewater treatment
  • Compound carbon source agent for wastewater treatment
  • Compound carbon source agent for wastewater treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] In the obtained composite carbon source agent: 0.5% of sodium formate, 5.5% of sodium acetate, 5.5% of sodium propionate, 44.5% of carbohydrates (glucose and fructose with a mass ratio of 2:1), and the rest is water.

[0043] Put the formic acid solution with a mass concentration of 20%, the acetic acid solution with a mass concentration of 20%, and the propionic acid solution with a mass concentration of 20% into the reactor in sequence according to the weight of 1.5%, 19%, and 19%, and gradually add the weight It is 16% sodium hydroxide solution with a mass concentration of 32%, and the rest is water. Start stirring, and after stirring for half an hour, control the temperature to 65-75°C, pH6.5-7.5, stop adding sodium hydroxide solution, and then slowly add glucose and fructose (mass ratio 2:1), continue to stir for 1 hour to mature, the reaction end temperature is 50°C (at this time COD 20-250,000 mg / L), filter to obtain a composite carbon source agent.

Embodiment 2

[0045] In the obtained composite carbon source agent: 0.7% of sodium formate, 5% of sodium acetate, 5% of sodium propionate, 45.5% of carbohydrates (xylose and fructose with a mass ratio of 1:1), and the rest is water.

[0046] Put the formic acid solution with a mass concentration of 20%, the acetic acid solution with a mass concentration of 20%, and the propionic acid solution with a mass concentration of 20% according to the weight of 2%, 18.5%, and 18.5% into the reactor in sequence, and slowly add the weight 15.5%, the mass concentration is 32% sodium hydroxide solution, the rest is water, and start stirring, after stirring for half an hour, control the temperature at 65-75°C, pH6.5-7.5, then slowly add xylose and fructose (mass Ratio 1:1), continue to stir for 1 hour to mature, the reaction end point temperature is about 50°C (at this time, COD reaches 200,000-250,000 mg / L), filter to obtain a composite carbon source agent.

[0047] Dosing point during wastewater treatme...

Embodiment 3

[0050] The obtained compound carbon source agent: contains 0.6% of sodium formate, 5.3% of sodium acetate, 5% of sodium propionate, 44.9% of carbohydrates (xylose and sucrose with a mass ratio of 1:1), and the rest is water.

[0051] Put the formic acid solution with a mass concentration of 20%, the acetic acid solution with a mass concentration of 20%, and the propionic acid solution with a mass concentration of 20% according to the weight of 1.8%, 18.8%, and 18.5% into the reactor in sequence, and slowly add the materials in batches The weight is 16%, the mass concentration is 32% sodium hydroxide solution, the rest is water, start stirring, after stirring for half an hour, control the temperature to 65-75°C, pH6.5-7.5, stop adding sodium hydroxide solution, and then slowly Add carbohydrates, continue to stir for 1 hour to mature, and the temperature at the end of the reaction is about 50°C (at this time, the COD reaches 200,000-250,000 mg / L), and filter to obtain a composite...

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Abstract

The invention discloses a compound carbon source agent for wastewater treatment, wherein the compound carbon source supplement is prepared from the following components by weight: 0.5-1.0% of sodium formate, 4.5-5.5% of sodium acetate, 5-6% of sodium propionate, 40-50% of carbohydrates and 40-45% of water, wherein the carbohydrates are a carbohydrate mixture with the COD more than 300000 mg / ml. The composite carbon source supplement belongs to an energy-saving, high-quality, high-efficiency and environmental-friendly water treatment agent, has the denitrification effect 1.5 times or more thatof traditional water treatment chemicals, and can well adapt to and meet the market demand.

Description

technical field [0001] The invention belongs to the field of water treatment, and in particular relates to a composite carbon source medicament for wastewater treatment. The composite carbon source medicament is a composite carbon source supplement regulator based on sodium formate, sodium acetate, sodium propionate and polysaccharides. Background technique [0002] Due to the continuous acceleration of urbanization, the discharge of domestic sewage and eutrophication substances have increased, resulting in increasingly serious eutrophication of lakes and reservoirs. At present, relevant departments have required sewage treatment plants to first use biological nitrogen and phosphorus removal before discharging sewage into receiving water bodies to prevent environmental pollution. Nitrification and denitrification denitrification is an efficient biological denitrification technology, which is widely used in the field of sewage treatment. In terms of microbial nitrogen remova...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28
CPCC02F3/28C02F2305/06
Inventor 曹锐曹正平邹鹏张彪
Owner YIXING HEDA WATER SOLUTION
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