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Denitrification reinforcing agent for constructed wetland, and preparation method and application method thereof

A technology of constructed wetlands and enhancers, applied in chemical instruments and methods, water/sludge/sewage treatment, biological water/sewage treatment, etc., can solve the problem of low microbial activity, affecting the treatment effect of constructed wetlands, and the total nitrogen of effluent is not up to standard and other issues, to achieve the effect of rich sources, low price, and improved denitrification capacity

Inactive Publication Date: 2017-03-29
SHENYANG ALUMINIUM MAGNESIUM INSTITUTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the sewage treatment system of constructed wetlands, microorganisms and plants are the main forces to degrade pollutants in water bodies. However, in winter in the north, it is relatively cold, and the activity of microorganisms is relatively low. At the same time, plants basically stop growing, which seriously affects the treatment effect of constructed wetlands. Therefore, it is urgent to develop a sewage treatment technology to solve this shortcoming

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0027] In a specific embodiment, the preparation method of the artificial wetland denitrification enhancer is to dissolve the constituent materials in 0.5wt% sodium chloride solution, and the denitrification enhancer prepared by stirring, filtering and other processes is a light brown liquid, pH The value is approximately neutral 6.5 ~ 7.5, the preparation steps are as follows:

[0028] The first step: dissolve; weigh beef extract, amino acids, vitamins, cytokinin, biotin, humic acid, trace elements according to the stated ratio, and add the weighed substances to a sodium chloride solution with a concentration of 0.5wt% , to make a mixture;

[0029] The second step: stirring; the mixture was stirred slowly for 3 hours to achieve uniform mixing.

[0030] The third step: Filtration; filter the mixed liquid, and the obtained filtrate is the prepared denitrification enhancer, dilute the denitrification enhancer with water 15 times, add it to the water inlet or distribution well o...

Embodiment 1

[0032] Example 1: Treatment of an urban sewage treatment plant in a certain place in Liaoning

[0033] In this embodiment, the artificial wetland denitrification enhancer contains beef extract, amino acids, vitamins, cytokinin, biotin, humic acid, trace elements and other substances, and the mass percentages of each substance are: beef extract 3.0%; amino acid 1.8 %; vitamin 2.5% (vitamin B3); cytokinin 0.56%; biotin 0.046%; humic acid 0.9%; Magnesium 2: Iron 0.5: Copper 0.2: Zinc 0.1: Selenium 0.2), and the balance is an aqueous solution of sodium chloride with a concentration of 0.5 wt%.

[0034] By comparing the experimental data before and after use, the denitrification effect of the constructed wetland system with the addition of denitrification enhancer is significantly increased, and the total nitrogen in the effluent is lower than 15mg / l, which can meet the "Pollutant Discharge Standards for Urban Sewage Treatment Plants" GB18918-2002 Grade A standard.

Embodiment 2

[0036]The difference from Example 1 is that the artificial wetland denitrification enhancer of this example contains substances such as beef extract, amino acids, vitamins, cytokinins, biotin, humic acid, trace elements, and the mass percentage of each substance is : beef extract 4.0%; amino acid 1.6%; vitamin 1.5% (vitamin B3, B5, mass ratio is 1:1); cytokinin 0.30%; biotin 0.043%; humic acid 1.0%; trace element 1.0% (trace element Among the elements, the respective mass ratios are sulfur 8: potassium 6: calcium 8: magnesium 1: iron 0.3: copper 0.3: zinc 0.3: selenium 0.15), and the balance is a sodium chloride aqueous solution with a concentration of 0.5 wt%.

[0037] By comparing the experimental data before and after use, the denitrification effect of the constructed wetland system with the addition of denitrification enhancer is significantly increased, and the total nitrogen in the effluent is lower than 15mg / l, which can meet the "Pollutant Discharge Standards for Urban ...

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Abstract

The invention specifically discloses a denitrification reinforcing agent for a constructed wetland, and a preparation method and an application method thereof, belonging to the technical field of environmental engineering sewage treatment and biological reinforcement. According to the invention, the denitrification reinforcing agent without any bacterial strain is developed according to the demands of microbes in the constructed wetland for nutriments in growth; the denitrification reinforcing agent reinforces the activity of nitrobacteria and denitrifying bacteria in indigenous microorganisms in the constructed wetland and allows the nitrobacteria and denitrifying bacteria to propagate rapidly; and pollutants in sewage are removed through cometabolism of microbes, so the denitrification capability of the constructed wetland is substantially improved. The denitrification reinforcing agent mainly comprises beef extract, amino acid, biotin, cytokinin, humic acid, vitamin, trace elements, etc. The raw materials of the denitrification reinforcing agent are widely available and cheap; the preparation method is simple; and the denitrification reinforcing agent is applicable to a constructed wetland sewage treatment system in the North in winter and has good application prospects as an auxiliary process.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering sewage treatment and bioaugmentation, and specifically relates to a constructed wetland denitrification enhancer and its preparation method and use method, that is, to develop a denitrification enhancer without bacteria and add it to the constructed wetland sewage In the treatment system, in order to strengthen the nitrogen removal capacity of the system. Background technique [0002] Bioremediation technology is an emerging technology developed in recent years. Because of its low investment and no secondary pollution, it has become a rapidly developing treatment technology. There are two main forms of microbial remediation technology: one is to use indigenous microorganisms to provide a suitable living environment for indigenous microorganisms, just like sewage treatment, to provide dissolved oxygen, nutrients, suitable pH value, temperature and other conditions to promote the d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32C02F3/34
Inventor 孟得磊
Owner SHENYANG ALUMINIUM MAGNESIUM INSTITUTE
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