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Preparation of denitrification nitrogen removal embedded biological cyclic active filler and application thereof

An active filler, nitrification and denitrification technology, applied in the direction of biological water/sewage treatment, water pollutants, anaerobic digestion treatment, etc., can solve the problems of difficult high efficiency, production cost and production efficiency, high technical requirements, etc., to achieve Good fluidization state, easy to fall off, and strengthen the effect of denitrification reaction

Active Publication Date: 2020-08-04
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high technical requirements for the production of mesh carriers, it is difficult to achieve high efficiency in the output of a single machine, resulting in problems in production cost and production efficiency.
[0005] In recent years, we have used (ZL201410137270.7) reticular straight cylindrical denitrification to embed biologically active fillers. We have carried out a large number of long-term pilot tests and production application tests. The fillers were found during the production and use of the fillers. In the preparation process There is a large room for improvement in the complexity of the process, production cost and packing structure

Method used

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  • Preparation of denitrification nitrogen removal embedded biological cyclic active filler and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1. Preparation of filler

[0024] The directional culture of denitrifying bacteria was carried out with the remaining sludge in the secondary sedimentation tank of the urban sewage plant as the bacterial source, and the denitrifying bacteria suspension after screening and enrichment culture was centrifugally dehydrated and concentrated to obtain a denitrifying bacteria concentrated solution with a bacterial concentration of 10 8 -10 9 individual / mL.

[0025] Utilize 90 ℃ of water dissolving PVAs to be prepared into the PVA solution of 40% mass concentration; According to (PVA addition is 25%; Denitrifying bacteria culture 50%; Diatomite 15%; 100 mesh wood activated carbon 4%; Calcium carbonate 5% ; The remaining 1% is sodium phosphate, magnesium sulfate, ferrous sulfate, manganese sulfate, and ZnSO 4 ·7H 2 O. NaMoO 4 2H 2 O, CoCl 2 ·6H 2 O, NiCl 2 ·6H 2 O, CuSO 4 ·5H 2 The mixture composed of O (percentage by weight: 5:21:30:43:0.4:0.15:0.15:0.15:0.15)) is mi...

Embodiment 2

[0031] 1. the preparation of filler (1) (same as example 1)

[0032] 2. Application of high-concentration chemical wastewater denitrification bioactive filler ( Nitrate concentration 2400mg / L )

[0033] Add 100 suspended balls prepared in 1. with filler (1) to the reactor with an effective volume of 120L, and finally form denitrifying bacteria embedded bioactive filler. The filling rate is 12.5%, and the water temperature is 28±2°C. , HRT= 8h , the pH is 7.5-8.0, the raw water is high-concentration wastewater produced by chemical fertilizer production, the nitrate concentration is 2400±200mg / L, the denitrification carbon source is sodium acetate, and the dosage ratio is 3.5-4.0 times that of nitrate nitrogen. The denitrification reactor Every 5 days of continuous operation, the packing is flushed by backwashing, and the nitrate nitrogen in the effluent of the reactor is measured on time. The test results of the effluent showed that after 15 days of culture recovery, the co...

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Abstract

The invention discloses preparation of denitrification nitrogen removal embedded biological cyclic active filler and an application thereof, which belong to the field of sewage and wastewater treatment. The embedding material is prepared from the following raw materials in percentage by mass: 20 to 30% of PVA; 50% of a denitrifying bacteria concentrated solution; 15-20% of diatomite; 4-6% of 100-mesh wood activated carbon; 4-5% of calcium carbonate; and the balance of an inorganic substance mixture; the preparation comprises the followings steps: adding the components into PVA hydrosol according to the adding materials of the components to prepare a colloidal embedding material; extruding a pipe strip-shaped object, placing the pipe strip-shaped object in a saturated boric acid solution tobe subjected to crosslinking, cleaning and cutting, and placing the pipe strip-shaped object in a 5% sodium sulfate solution to be soaked and cleaned to form a final embedded filler product. The denitrification reaction of denitrifying bacteria can be enhanced.

Description

Technical field: [0001] The invention belongs to the field of sewage and wastewater treatment, and in particular relates to the preparation and application of a denitrification and denitrification embedded bioactive filler. Background technique: [0002] At present, the biochemical method is recognized as an economical and effective method for nitrogenous pollution and wastewater treatment due to its mature technology and stable performance. Biochemical methods include: activated sludge method and biofilm method. In the activated sludge method, the amount of bacteria is maintained by sludge reflux. To obtain high efficiency, the concentration of bacteria in the biochemical reaction tank must be increased. However, the content of nitrifying bacteria in the mixed sludge of the single-sludge system currently used is extremely limited. If you want to increase The content of denitrifying bacteria can only be greatly increased as a whole if the sludge concentration in the reactio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28C02F3/34C02F101/16
CPCC02F3/2806C02F3/348C02F2101/163
Inventor 杨宏
Owner BEIJING UNIV OF TECH
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