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Preparation and application of ammonia oxidizing bacteria immobilized star-shaped bioactive filler based on reticulate carrier

An ammonia oxidizing bacteria and biological activity technology, applied in the field of water treatment, can solve the problems of bacterial loss, easy shedding of the embedded body, poor overall stability, etc., and achieve the effects of large encapsulated bacteria, improved hydrophilicity and stable performance.

Active Publication Date: 2014-07-30
湖南汨罗循环经济产业园区科技创新服务中心
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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 ammonia oxidizing bacteria immobilized star-shaped bioactive filler based on reticulate carrier
  • Preparation and application of ammonia oxidizing bacteria immobilized star-shaped bioactive filler based on reticulate carrier
  • Preparation and application of ammonia oxidizing bacteria immobilized star-shaped bioactive filler based on reticulate carrier

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Experimental program
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Effect test

Embodiment 1

[0028] 1. Preparation of Mesh Support

[0029] Using high molecular polymers such as polypropylene as the main material, add 10wt% polyvinyl alcohol (PVA) to make a sheet-shaped mesh carrier with a length of 2.0cm and a width of 1.5cm. The shape of the mesh is square, the side length is 2mm, and the wire diameter is 1.55mm. Six pieces of the above-mentioned sheet-shaped carriers are melted and bonded to form a star-shaped mesh carrier with an included angle of 60°.

[0030] 2. Treatment of ammonia oxidizing bacteria

[0031] Using the residual sludge in the secondary sedimentation tank of the urban sewage plant as the bacterial source, the ammonia-oxidizing bacteria suspension after screening and enrichment culture was centrifuged and concentrated to obtain 4.0×10 9 Ammonia oxidizing bacteria concentrate per mL.

[0032] 3. Acquisition of ammonia oxidizing bacteria embedding solution

[0033] Weigh 5kg of polyvinyl alcohol, add 25L of ultrapure water and heat to 90°C to di...

Embodiment 2

[0041] 1. Preparation of Mesh Support

[0042] Polyethylene and other high molecular polymers are used as the main material, and the hydrophilic material polyvinyl alcohol (PVA) is added to make a sheet-shaped mesh carrier with a length of 2.0 cm and a width of 1.0 cm. The shape of the mesh is rectangular, the length is 2mm, the width is 1.5mm, and the wire diameter is 1mm. Five sheets of the above-mentioned sheet-shaped carriers are thermally melted and bonded to form a star-shaped mesh carrier with an included angle of 72°.

[0043] 2. Treatment of ammonia oxidizing bacteria

[0044] Using the residual sludge in the secondary sedimentation tank of the urban sewage plant as the bacterial source, the ammonia-oxidizing bacteria suspension after screening and enrichment culture was centrifuged and concentrated to obtain 3.0×10 9 Ammonia oxidizing bacteria concentrate per mL.

[0045] 3. Acquisition of ammonia oxidizing bacteria embedding solution

[0046] Weigh 5kg of polyvi...

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Abstract

The invention discloses an ammonia oxidizing bacteria immobilized star-shaped bioactive filler based on a reticulate carrier, and preparation and an application thereof, and belongs to the technical field of water treatment. The star-shaped bioactive filler comprises two parts: an embedding body and the carrier; the carrier is a star-shaped reticulate 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 so as to increase the filler overall stability; an embedding liquid is formed by mixing an ammonia oxidizing 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 and is combined with the reticulate carrier to obtain the ammonia oxidizing bacteria bioactive filler. The prepared ammonia oxidizing bacteria immobilized star-shaped bioactive filler not only solves the problems that ammonia oxidizing 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 relates to the field of water treatment, in particular to the preparation and application of a star-shaped bioactive filler for immobilizing ammonia oxidizing bacteria based on a mesh carrier. Background technique [0002] Today, the problem of ammonia nitrogen pollution is becoming more and more serious. Ammonia nitrogen has become a new constraint indicator for emission reduction during the 12th Five-Year Plan. Improving the level of ammonia nitrogen pollution prevention and control has become a necessary measure to improve the quality of water environment. At present, ammonia nitrogen wastewater treatment methods are divided into three categories, physical and chemical methods, biochemical methods and advanced oxidation methods. Due to the mature process and stable performance, the biochemical method is recognized as an economical, effective and most promising method. Biochemical methods include activated sludge method and biofilm met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34C02F3/10
CPCY02W10/10
Inventor 杨宏管清坤吴城锋尚海源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 湖南汨罗循环经济产业园区科技创新服务中心
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