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Preparation method of immobilized pellets containing activated sludge

A technology of immobilized pellets and activated sludge, applied in biochemical equipment and methods, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problem of inhibiting the activity of bacterial strains and reducing the ball formation rate of immobilized pellets , easy adhesion and other problems

Pending Publication Date: 2022-03-01
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a commonly used embedding material, polyvinyl alcohol has the problem of easy adhesion when dripping, resulting in a decrease in the ball formation rate of immobilized pellets
At the same time, saturated boric acid aqueous solution is the most commonly used cross-linking agent when polyvinyl alcohol is used as embedding material, but boric acid has a certain acidity, which may inhibit the activity of the strain

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Formulation of crosslinking agents: 1.5 g of calcium chloride was added to 98 mL of saturated boric acid solution, and the crosslinking agent was prepared, and the pH was adjusted with sodium carbonate to 6.0.

[0019] (2) Active sludge coating: Nanjing Chemical Research Institute Co., Ltd. provides the remaining sludge collected by the sewage treatment plant, removing its particulate matter and impurities, loading the sludge bottle, adding the medium; wherein the amount of sludge and medium The volume ratio was 1: 4, and the temperature culture was 30 ° C in anaerobic incubator, replaced once every 5 days, so that the sulfate resection SrB occupied the strength of the flora, and finally centrifugally to the supernatant, and produce domestication The active sludge. Where medium ingredients: MGS0 4 · 7h 2 00.05g / L; NA 2 S0 4 4G / L; KH 2 P0 4 0.4g / L; CAS0 4 0.9g / L; NH 4 Ci 0.8g / L; FES0 4 · 7h 2 0 0.008g / L; CACL 2 · H 2 0 0.05 g / L; yeast extract 0.5 g / L; sod...

Embodiment 2

[0022] (1) Formulation of crosslinking agent: 2G calcium chloride is added to 98 mL of saturated aqueous solution of saturated boric acid, and the crosslinking agent is obtained, and the pH is adjusted to 6.4 with sodium carbonate.

[0023] (2) Active sludge coating: Nanjing Chemical Research Institute Co., Ltd. provides the remaining sludge collected by the sewage treatment plant, removing its particulate matter and impurities, loading the sludge bottle, adding the medium; wherein the amount of sludge and medium The volume ratio was 1: 4.5, and the thermostatic culture medium was cultured in an anaerobic incubator. The medium was replaced once every 6 days, so that the sulfate reachaeson SRB occupied the strength of the flora, and finally the domesticated active sludge was taken. . Where the medium formulation is: MGS0 4 · 7h 2 0 0.06g / L; NA 2 S0 4 4.5g / L; kh 2 P0 4 0.5g / L; CAS0 4 1g / L; NH 4 Ci 1g / L; FES0 4 · 7h 2 0 0.01g / L; CACL 2 · H 2 0.0.06 g / L; yeast extract 1 ...

Embodiment 3

[0026] (1) Formulation of crosslinking agents: 2.5 g of calcium chloride is added to 100 ml of saturated aqueous solution of saturated boric acid, and the crosslinking agent is obtained, and the pH is adjusted with sodium carbonate to 6.7.

[0027] (2) Active sludge coating: Nanjing Chemical Research Institute Co., Ltd. provides the remaining sludge collected by the sewage treatment plant, removing its particulate matter and impurities, loading the sludge bottle, adding the medium; wherein the amount of sludge and medium The volume ratio is 1: 5, and the temperature culture 21D is replaced at an anaerobic incubator, and the medium is replaced every 7 days, so that the sulfate reducing bacteria SRB occupies the strength of the flora, and finally the domesticated active sludge is taken. . Where the medium formulation is: MGS0 4 · 7h 2 0 0.07g / L; NA 2 S0 4 5g / L; kh 2 P0 4 0.6g / L; CAS0 4 1.1g / L; NH 4 Ci 1.2g / L; FES0 4 · 7h 20 0.012g / L; CaCl 2 · H 2 0.0.065g / L; yeast extr...

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Abstract

The invention relates to a preparation method of immobilized pellets containing activated sludge, which comprises the following specific steps: 1) adding polyvinyl alcohol, sodium alginate, activated carbon and silicon dioxide into an aqueous solution, heating to 90-100 DEG C, and uniformly stirring to obtain mixed slurry; 2) after the temperature of the mixed slurry is reduced to 30-40 DEG C, adding domesticated activated sludge into the mixed slurry, and uniformly stirring to prepare a mixed solution containing sludge; 3) dropwise adding the sludge-containing mixed solution into a cross-linking agent, and standing to obtain immobilized pellets; and 4) washing the immobilized pellets with a NaCl aqueous solution. The small balls prepared by the method are relatively good in mass transfer performance, and have a certain prospect when being used for treating sulfur-containing wastewater.

Description

Technical field [0001] The present invention relates to the field of sulfate wastewater treatment techniques, and more particularly to a method of preparing an active sludge immobilization might. Background technique [0002] With the rapid development of the economy and the growing population, the emissions of urban life sewage and industrial wastewater have increased year by year, and sulfate in wastewater is one of the main components. [0003] Compared to the traditional physicochemical method, the microbial treatment method has the advantages of high removal rate, and the processing process consumes less energy, is the current environmental economy. However, there is a problem of severe strain loss in conventional biological treatment, and slowly reproduction of bacteria and the instability of the reaction system, and is susceptible to external effects. In order to solve the above problems, immobilized microbiological technology is developed. The technique is to limit the fr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12N1/00C02F3/34C02F101/10
CPCC12N1/00C02F3/345C02F3/34C02F2101/101C02F2305/06
Inventor 胡永红汪婷叶竞灵程欣欣王志崔子龙杨文革
Owner NANJING UNIV OF TECH
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