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Preparation and application of an immobilized straight cylindrical bioactive filler based on a network carrier

A bioactive and carrier technology, applied in the field of preparation and application of immobilized straight cylindrical bioactive fillers, can solve the problems of poor overall stability, bacterial loss, easy shedding of embedded bodies, etc., to increase strength, avoid the growth of miscellaneous bacteria, The effect of improving hydrophilicity

Active Publication Date: 2016-05-25
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Experimental studies have shown that the bioactive fillers prepared by combining traditional carriers such as Raschig rings, Pall rings, stepped rings, and suspended modified fillers with embedding bodies through adhesion have poor overall stability and embedding The body is easy to fall off, causing problems such as bacterial loss

Method used

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  • Preparation and application of an immobilized straight cylindrical bioactive filler based on a network carrier
  • Preparation and application of an immobilized straight cylindrical bioactive filler based on a network carrier
  • Preparation and application of an immobilized straight cylindrical bioactive filler based on a network carrier

Examples

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example 1

[0029] 1. Preparation of Mesh Support

[0030] Polypropylene and other high molecular polymers are used as the main material, and the hydrophilic material polyvinyl alcohol (PVA) (preferably 5%) is added to make a straight cylindrical structural network with a diameter of 0.5-1.5cm and a height of 0.5-1.5cm The surface carrier has a square mesh shape and a wire diameter of 0.5 mm.

[0031] 2. Treatment of nitrifying bacteria

[0032] Using the residual sludge in the secondary sedimentation tank of the urban sewage plant as the bacterial source, the nitrifying bacteria suspension after screening and enrichment culture was centrifuged and concentrated to obtain 3.5×10 9 A / mL concentration of nitrifying bacteria.

[0033] 3. Acquisition of nitrifying bacteria embedding solution

[0034] Weigh 500g of polyvinyl alcohol, add 4000ml of ultrapure water and heat to 90°C to dissolve for 15min, take it out and stir evenly, then heat to 90°C and dissolve for 5min, take it out, stir ev...

example 2

[0043] 1. Preparation of Mesh Support

[0044] Polyethylene and other high molecular polymers are used as the main material, and the hydrophilic material polyvinyl alcohol (PVA) (content 6%) is added to make a straight cylindrical mesh carrier with a diameter of 1.0-2.0cm and a height of 1.0-2.0cm. The mesh shape is rhombus, and the wire diameter is 0.5mm.

[0045] 2. Treatment of nitrifying bacteria

[0046] Using the residual sludge in the secondary sedimentation tank of the urban sewage plant as the bacterial source, the nitrifying bacteria suspension after screening and enrichment culture was centrifuged and concentrated to obtain 3.5×10 9 A / mL concentration of nitrifying bacteria.

[0047] 3. Acquisition of nitrifying bacteria embedding solution

[0048] Weigh 5kg of polyvinyl alcohol, add 40L of ultrapure water and heat to 90°C to dissolve for 15min, take it out and stir evenly, then heat to 90°C and dissolve for 5min, take it out, stir evenly and cool to 30°C, mix 40L ...

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Abstract

The invention discloses preparation and an application of an immobilized straight-tubular bioactive filler based on a reticulate carrier, and belongs to the technical field of water treatment. The straight-tubular bioactive filler comprises two parts: an embedding body and the carrier; the carrier is a straight-tubular carrier formed by taking polyethylene or polypropylene as a main material, adding a polyvinyl alcohol hydrophilic material and carrying out hot melting or plate hot pressing; with a reticulate structure of the carrier, the embedding body can be allowed to penetrate through meshes to form a riveting fixing structure together with the carrier so as to increase the filler overall stability; an embedding liquid is formed by mixing a bacteria concentrated solution and a polyvinyl alcohol solution; the reticulate carrier is evenly coated with the embedding liquid, and the embedding body is formed after boric acid secondary cross-linking of the embedding liquid and is combined with the reticulate carrier to obtain the bioactive filler. The prepared immobilized straight-tubular bioactive filler not only solves the problems that bacteria are difficult in advantage establishment, easy to lose and the like, but also improves the processing ability of a reactor, shortens the start-up time, and has broad application prospects.

Description

technical field [0001] The invention belongs to the field of water treatment, in particular to the preparation and application of an immobilized straight cylindrical bioactive filler based on a mesh carrier. Background technique [0002] Microbial cell immobilization technology can greatly increase the concentration of microorganisms, make it difficult for microorganisms to lose, shorten the start-up time of the reactor, significantly enhance the ability of anti-toxicity, acid and alkali resistance, and salt resistance, and can purify and create the ecological advantages of characteristic bacteria, and produce characteristic and efficient reactions , showing good application prospects. The commonly used immobilization methods of microbial cells include adsorption, cross-linking and embedding. Among them, the embedding method is the most commonly used, and the materials that have been successfully used for microbial cell embedding include: polyvinyl alcohol, agar, K-carragee...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/34C02F3/10C02F3/00
CPCY02W10/10
Inventor 杨宏尚海源管清坤吴城锋陈伟鄢琳王小乐王猛孟婷陶慕翔胡希佳赵月兰王玉洁姚仁达
Owner BEIJING UNIV OF TECH