Ammonia oxidizing bacteria fixed-type bioactive fillers, and preparation and application thereof

A technology of ammonia oxidizing bacteria and bioactivity, applied in the field of water treatment, can solve the problems of unsatisfactory effect of bioactive fillers, poor stability of bioactive fillers, easy detachment of embedded bodies, etc., achieve good substrate mass transfer effect, shorten start-up The effect of time and strong acid and alkali resistance

Active Publication Date: 2014-07-30
BEIJING UNIV OF TECH
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Problems solved by technology

After experimental research and comparison, we found that the bioactive fillers prepared based on the traditional filler structure and embedding method did not perform well in the test, and there were many problems such as poor overall stability of the bioactive filler, easy falling off of the embedded body, and water-soluble swelling. question

Method used

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  • Ammonia oxidizing bacteria fixed-type bioactive fillers, and preparation and application thereof

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example 1

[0029] (1) Preparation of ammonia oxidizing bacteria concentrate

[0030] 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 15L3.5×10 9 Individual / mL ammonia oxidizing bacteria concentrate;

[0031] (2) Preparation of polyvinyl alcohol solution

[0032] Take 5.0kg of polyvinyl alcohol in a water bath and heat it to 90°C and dissolve it in 35L of water to obtain a polyvinyl alcohol solution;

[0033] (3) Acquisition of embedding solution

[0034] Cool the polyvinyl alcohol solution in step (2) to 30°C and fully mix it with 15L of ammonia-oxidizing bacteria concentrate obtained in step (1) to obtain 50L of embedding fluid. The mass concentration of polyvinyl alcohol in the embedding fluid is 100g / L;

[0035] (4) Preparation of embedding carrier

[0036] Lay four layers of polyvinyl alcohol...

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Abstract

The invention discloses ammonia oxidizing bacteria fixed-type bioactive fillers, and preparation and an application thereof, and belongs to the technical field of water treatment. Bioactive fillers are each composed of a carrier and an embedding body loaded with ammonia oxidizing bacteria, and the fillers are fixed on a prefabricated frame to form the fixed-type bioactive fillers; each carrier is prepared by sewing multiple layers of polyvinyl alcohol non-woven fabrics and one layer of textile fabric; each embedding body is formed by boric acid cross-linking immobilization of an embedding liquid; the embedding liquid is formed by mixing an ammonia oxidizing bacteria concentrated solution and a polyvinyl alcohol solution. Each carrier is soaked in the embedding liquid, through boric acid secondary cross-linking, the non-woven fabrics and the embedding body are firmly bound together, the embedding body penetrates through textile fabric meshes to form an overall riveting fixing structure and does not easily fall off, and the good tensile property of the textile fabric improves the overall stability of the bioactive filler. The prepared ammonia oxidizing bacteria fixed-type bioactive fillers not only solve the problems that the ammonia oxidizing bacteria are difficult in advantage establishment, easy to lose and the like, but also improve the processing ability of a reactor, and have a good application prospect.

Description

technical field [0001] The invention relates to the preparation and application of an ammonia-oxidizing bacteria immobilized biologically active filler in water treatment, in particular to an ammonia-oxidizing bacteria-immobilized biologically active filler with textiles and polyvinyl alcohol non-woven fabrics as carriers, which belongs to water treatment technology field. 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 biochemic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34C02F3/10C02F101/16
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
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