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Embedded immobilization microbial carrier, preparation method thereof and sewage treatment method

A technology for immobilizing microorganisms and carriers, which is applied in biological water/sewage treatment, immobilization on/in organic carriers, water/sludge/sewage treatment, etc. The removal effect of nitrate nitrogen and the poor resistance to load shock can achieve the effect of high sewage treatment efficiency, reduction of treatment costs, and improvement of mud age.

Pending Publication Date: 2018-10-12
SHENZHEN CHANGLONG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the nitrogen in metal surface treatment wastewater exists in the form of nitrate nitrogen. Chemical methods can remove toxic and harmful substances and high phosphorus in water well, but cannot achieve a good removal effect on nitrate nitrogen
Due to the slow growth of denitrification bacteria in traditional biological denitrification, it is easy to lose from the system with the water flow, so it is difficult to maintain a high biological concentration in the bioreactor, and has defects such as poor load impact resistance and low volumetric loading rate, which limits its mass use

Method used

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  • Embedded immobilization microbial carrier, preparation method thereof and sewage treatment method
  • Embedded immobilization microbial carrier, preparation method thereof and sewage treatment method
  • Embedded immobilization microbial carrier, preparation method thereof and sewage treatment method

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preparation example Construction

[0050] See figure 1 , The present invention first provides a preparation method for embedding and immobilizing microorganism carriers, which includes the following steps:

[0051] Step 1. Add polyvinyl alcohol (PVA) and sodium alginate (SA) into water, heat to fully dissolve polyvinyl alcohol and sodium alginate to obtain a first gel solution, and cool the first gel solution to 20 ℃-40℃.

[0052] Specifically, in the first gel solution, the mass percentage of polyvinyl alcohol is 10%-15%, and the mass percentage of sodium alginate is 1%-3%.

[0053] Preferably, in the step 1, the water is deionized water.

[0054] Preferably, in the step 1, the first gel solution is cooled to 30°C.

[0055] Specifically, the polyvinyl alcohol refers to polyvinyl alcohol with a degree of polymerization of 1750±100 and a degree of alcoholysis> 98%.

[0056] Specifically, in the step 1, the method of heating to fully dissolve polyvinyl alcohol and sodium alginate is: heating water to which polyvinyl alcoho...

Embodiment 1

[0098] The present invention optimizes the concentration of the gas-producing compound solution used in step 2 of the preparation method of the embedded immobilized microbial carrier, and the specific steps are:

[0099] Step 1). Four sets of experiments were carried out for the preparation method of the embedding and immobilized microbial carrier, the concentration of boric acid in the cross-linking agent used in the four sets of experiments were all 4% (saturated concentration), the steps of the four sets of experiments 2 The gas generating compound solutions used are all sodium bicarbonate solutions. The difference is: in step 2 of the 4 sets of experiments, the concentration of sodium bicarbonate in the second gel solution is 0%, 0.3%, 0.6%, 0.9%, the 4 groups of experiments respectively obtained 4 kinds of embedded and immobilized microbial carriers;

[0100] Step 2). Investigate the mass transfer performance of the embedded and immobilized microbial carriers prepared in the a...

Embodiment 2

[0110] The present invention optimizes the carbon-nitrogen ratio of sewage in the sewage treatment method, and the specific steps are as follows:

[0111] Step 1). Add 20 mL of embedded and immobilized microbial carrier to 100 mL test bottles numbered 1, 2, 3, 4, 5, and 6, and then add nitrate nitrogen to each test bottle at a concentration of 126.3 mg / L of metal surface treatment wastewater and anhydrous sodium acetate (ie carbon source) to a total volume of 100 mL, the carbon to nitrogen ratios in the test bottles numbered 1 (control), 2, 3, 4, 5, and 6 were respectively 0, 1.0, 1.5, 2.0, 2.5, 3.0;

[0112] The case where the carbon-to-nitrogen ratio is 0 is the case where no carbon source is added to the metal surface treatment wastewater. At this time, the amount of carbon source in the metal surface treatment wastewater is almost zero.

[0113] Step 2). Place the measuring bottle in step 1) in a shaker and incubate at 200 rpm at 30°C. At the treatment time points of 0h, 5h, 10...

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Abstract

The invention discloses an embedded immobilization microbial carrier, a preparation method thereof and a sewage treatment method. The preparation method of the embedded immobilization microbial carrier comprises the following steps: adding polyvinyl alcohol and sodium alginate into water, heating for fully dissolving the polyvinyl alcohol and sodium alginate to obtain a first gel solution, and cooling the first gel solution to 20 to 40 DEG C; providing a bacteria solution and a gas-producing compound solution, wherein the gas-producing compound is a compound which can react with hydrogen ionsto generate gas; uniformly mixing the bacteria solution, the gas-producing compound solution and the first gel solution to obtain a second gel solution; providing a crosslinking agent, wherein the crosslinking agent is an aqueous solution containing calcium chloride and boric acid; dropwise dripping the second gel solution into the crosslinking agent to obtain the embedded immobilization microbialcarrier. The embedded immobilization microbial carrier is gel beads with a porous structure.

Description

Technical field [0001] The invention relates to the field of sewage treatment, in particular to an embedded and immobilized microbial carrier, a preparation method thereof, and a sewage treatment method. Background technique [0002] With the rapid rise of my country's manufacturing industry, industries such as mechanical processing, electroplating and smelting often need to wash the metal surface when performing metal surface treatment, which generates a large amount of washing and washing wastewater. Metal surface treatment wastewater is rich in various organic matter, high phosphorus, high nitrogen and toxic and harmful heavy metals. The high content of nitrogen will not only cause eutrophication of the water body, but also cause serious damage to human health. Therefore, the denitrification treatment of this type of wastewater is very important. [0003] At this stage, the most widely used methods for treating metal surface treatment wastewater at home and abroad are mainly ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12N11/10C12N11/04C02F3/34
CPCC02F3/34C12N11/04C12N11/10
Inventor 董红红周晓青周小峰杨庆杨路滨李海天董林辉蔡振山
Owner SHENZHEN CHANGLONG TECH CO LTD
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