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Application of compound carbon-sourced agent in wastewater treatment

A composite carbon source and wastewater treatment technology, applied in the field of water treatment, can solve the problems of affecting the quality of effluent water, the denitrification rate is not as good as methanol and sodium acetate, and the effect is not good, so as to reduce the production volume and treatment difficulty, avoid high risk and high Cost, water quality and wide application range

Inactive Publication Date: 2018-12-07
YIXING HEDA WATER SOLUTION
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  • Summary
  • 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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  • Application of compound carbon-sourced agent in wastewater treatment
  • Application of compound carbon-sourced agent in wastewater treatment
  • Application of compound carbon-sourced agent in wastewater treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] In the obtained composite carbon source medicament: 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.

[0037] 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 turn according to the weight of 1.5%, 19%, and 19%. It is a 16% sodium hydroxide solution with a mass concentration of 32% and the rest is water. Turn on the stirring. After stirring for half an hour, control the temperature to 65-75°C, pH 6.5-7.5, 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 end temperature of the reaction is 50 ℃ (at this time COD 20-25 million mg / L), filter to obtain the composite carbon source agent. See the above-mentioned inve...

Embodiment 2

[0039] In the obtained composite carbon source medicament: 0.7% of sodium formate, 5% of sodium acetate, 5% of sodium propionate, 45.5% of sugars (xylose and fructose with a mass ratio of 1:1), and the rest is water.

[0040] Put 20% by mass formic acid solution, 20% by mass acetic acid solution and 20% by mass concentration of propionic acid solution into the reaction kettle according to the weight of 2%, 18.5%, and 18.5%, and slowly add the weight in portions Sodium hydroxide solution with 15.5% by mass and 32% by mass, the rest is water, and the stirring is turned on. After stirring for half an hour, the temperature is controlled at 65-75°C and the pH is 6.5-7.5, and then xylose and fructose are slowly added in sequence (quality Ratio 1:1), continue to stir and mature for 1 hour, the end temperature of the reaction is about 50 ℃ (at this time COD to 200,000-250,000 mg / L), filter to obtain the composite carbon source agent.

[0041] Dosing point for wastewater treatment: biochemi...

Embodiment 3

[0044] The obtained composite carbon source medicament contains 0.6% of sodium formate, 5.3% of sodium acetate, 5% of sodium propionate, 44.9% of sugars (xylose and sucrose with a mass ratio of 1:1), and the rest is water.

[0045] 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 order of 1.8%, 18.8%, and 18.5% by weight, and slowly add the batching 16% by weight, 32% by weight sodium hydroxide solution, the rest is water, turn on the stirring, after stirring for half an hour, control the temperature to 65-75℃, pH 6.5-7.5, stop adding sodium hydroxide solution, and then slowly Add carbohydrates, continue to stir for 1 hour to mature, and the end temperature of the reaction is about 50°C (at this time, COD is 200,000-250,000 mg / L), filtered to obtain the composite carbon source agent.

[0046] Dosing point for wastewater treatm...

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Abstract

The invention discloses application of a compound carbon-sourced agent in wastewater treatment. The compound carbon-sourced agent is prepared from the following components in percentage by weight: 0.2-1.8 percent of sodium formate, 4-6 percent of sodium acetate, 4-6 percent of sodium propionate, 40-50 percent of carbohydrate, 35-45 percent of water, wherein the carbohydrate is carbohydrate mixturehaving COD being more than 300000mg / ml. The compound carbon-sourced agent is applied to wastewater treatment, has energy conservation, high quality, high efficiency and environmental friendliness, has a denitrification effect of more than 1.5 times that of traditional water treatment chemicals, and can well adaptive to and meet the market requirement.

Description

Technical field [0001] The invention belongs to the field of water treatment, and specifically relates to the application of a composite carbon source agent in wastewater treatment. 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, the relevant departments have required the sewage treatment plant to first use biological nitrogen and phosphorus removal, and then discharge the sewage into the receiving water body to prevent environmental pollution. Nitrification and denitrification is an efficient biological denitrification technology, which is currently widely used in the field of sewage treatment. In terms of microbial denitrification, when performing denitrification, heterotrophic denitrifying bacteria need to consume additional organic matter as a carbon source and provide energy. C...

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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