Method for realizing synchronous nitrification and denitrification nitrogen removal by utilizing immobilized microorganism technology

A technology of immobilized microorganisms and synchronous nitrification, applied in chemical instruments and methods, biological water/sewage treatment, water pollutants, etc., can solve the problems of low batch reuse, low denitrification efficiency, difficult promotion and application, etc. , to achieve the effect of reducing the number of structures, increasing reusable batches, and reducing operating costs

Inactive Publication Date: 2019-11-22
CHAMBROAD CHEM IND RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the immobilized gel beads prepared under the existing technical conditions are easily broken in the biochemical system, have low mechanical strength, low reusable batches, poor mass transfer performance, and low nitrogen removal efficiency. The application of chemical microbial technology in the field of sewage treatment; although there have been technical solutions using carrier-loaded microbial treatment agents in the prior art, the above-mentioned solutions require directional domestication and cultivation of the loaded microorganisms, which require a lot of time and effort. It can only be completed with energy, and because the results of domestication and cultivation are unknown, the effects vary greatly, and it is difficult to promote and apply better

Method used

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  • Method for realizing synchronous nitrification and denitrification nitrogen removal by utilizing immobilized microorganism technology

Examples

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Effect test

Embodiment 1

[0063] Polyvinyl alcohol / sodium alginate-boric acid / calcium chloride embedding method immobilized microorganism technology to realize simultaneous nitrification and denitrification denitrification process of tannery wastewater. The specific steps are as follows:

[0064] 1. Preparation of embedding agent

[0065] Slowly add 13g of polyvinyl alcohol into 150mL of 100°C distilled water while stirring, stir until completely dissolved; in another beaker, slowly add 1.6g of sodium alginate into 150mL of 85°C distilled water while stirring, fully stir until completely dissolved; Under the condition of sufficient stirring, slowly pour the polyvinyl alcohol solution into the sodium alginate solution, and mix for 30 minutes to obtain the embedding agent; stop heating, cool the embedding agent to room temperature, and set aside.

[0066] 2. Preparation of crosslinking agent

[0067] Add 2% (W / V) calcium chloride to the saturated boric acid solution, stir to dissolve, use saturated sodi...

Embodiment 2

[0078] Carrageenan-potassium chloride embedding method immobilized microorganism technology to realize petrochemical wastewater simultaneous nitrification and denitrification denitrification process, the specific steps are as follows:

[0079] 1. Preparation of embedding agent

[0080] In a beaker, slowly add 4.43g of carrageenan to 150mL of 90°C distilled water while stirring, stir well until completely dissolved to obtain the embedding agent, keep warm at 50-55°C, and set aside.

[0081] 2. Preparation of crosslinking agent

[0082] Prepare 2-4% (W / V) potassium chloride solution, and put it into the refrigerator to refrigerate to 6°C.

[0083] 3. Preparation of bacterial suspension

[0084] Take the nitrifying bacteria agent culture solution and the denitrification bacteria agent culture solution obtained by enriching activated sludge respectively, centrifuge at 8000rpm for 10min, discard the supernatant, suspend the bacterial cell sediment with sterile water, centrifuge a...

Embodiment 3

[0093] The comparison between simultaneous nitrification and denitrification denitrification by sodium alginate-calcium chloride embedding method immobilized microorganism technology and traditional A / O process denitrification, the specific steps are as follows:

[0094] 1. Preparation of embedding agent

[0095] In a beaker, slowly add 5g of sodium alginate to 150mL of 85°C distilled water while stirring, stir well until it is completely dissolved to obtain the embedding agent; stop heating, cool the embedding agent to room temperature, and set aside.

[0096] 2. Preparation of crosslinking agent

[0097] Prepare a 5% (W / V) calcium chloride solution, and put it in a refrigerator to refrigerate to 4°C.

[0098] 3. Preparation of bacterial suspension

[0099] Take the nitrifying bacteria agent culture solution and the denitrification bacteria agent culture solution obtained by enriching activated sludge respectively, centrifuge at 8000rpm for 10min, discard the supernatant, s...

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Abstract

The invention relates to the technical field of sewage treatment. The invention particularly provides a method for realizing synchronous nitrification and denitrification nitrogen removal by utilizingan immobilized microorganism technology. The adopted immobilized microorganism technology comprises the following steps: mixing a nitrifying bacterium agent and a denitrifying bacterium agent according to a certain ratio and adsorbing the mixture by using an adsorbent; embedding the adsorbed microbial inoculum by adopting an embedding agent; after embedding, adding dropwise a gel solution into across-linking agent to form gel beads with biological activity. The prepared gel beads sequentially form aerobic, anoxic and anaerobic environments from the surface to the inside which perform nitrification reaction, denitrification reaction and hydrolytic acidification respectively, nitrification liquid backflow is not needed, and synchronous nitrification and denitrification nitrogen removal canbe realized. Compared with a traditional biological denitrification process, the method has higher denitrification efficiency, and is simple in operation process, convenient to maintain and manage and easy to popularize.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, and specifically provides a method for preparing synchronous nitrification and denitrification denitrification microbial pellets by using immobilized microorganism technology and a process for using the pellets to perform synchronous nitrification and denitrification denitrification. Background technique [0002] With the continuous occurrence of eutrophication in water bodies, the problem of nitrogen pollution has attracted people's attention. Traditional biological denitrification is achieved through two processes of nitrification and denitrification. In the past three decades, despite the great development of biological denitrification technology, the two processes of nitrification and denitrification still need to be carried out in two isolated reactors or in different stages of the same reactor. The traditional biological denitrification process occupies a large area and requires h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34C02F3/30C02F101/38C02F101/30C02F101/16
CPCC02F3/34C02F3/30C02F2101/16C02F2101/30C02F2101/38
Inventor 薛飞马韵升吴文雷徐泽平杨传伦车树刚吴书超王珍周倩
Owner CHAMBROAD CHEM IND RES INST CO LTD
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