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Efficient nitrification embedded bioactive filler and preparation method thereof

A biologically active and efficient technology, applied in chemical instruments and methods, sustainable biological treatment, biological water/sewage treatment, etc., can solve the problems of high efficiency, high technical requirements, production cost and production efficiency, etc. The effect of good fluidization state, strengthening nitrification reaction and reducing requirements

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 carried out a large number of long-term pilot tests and production application tests by using the net-shaped straight cylindrical embedded bioactive filler. We found that the filler was produced and used in the process of the filler. In the preparation process, production cost and filler structure There is a lot of room for improvement in the complexity of the form

Method used

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  • Efficient nitrification embedded bioactive filler and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1. Preparation of filler (1)

[0024] The directional culture of nitrifying bacteria was carried out with the residual sludge in the secondary sedimentation tank of the urban sewage plant as the bacterial source, and the nitrifying bacteria suspension after screening and enrichment culture was centrifugally dehydrated and concentrated to obtain a nitrifying bacteria culture with a water content of 80%.

[0025] Utilize 90 ℃ of water dissolving PVA to be prepared into the PVA solution of 40% mass concentration; According to (PVA addition is 25%; Nitrobacter concentrated solution 50% (concentration is 10%) 9 1 / mL); diatomite 15%; 100 mesh wood activated carbon 4%; calcium carbonate 5%; the remaining 1% is sodium phosphate, magnesium sulfate, iron 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 (weight ratio: 5:21:21:52:0.4:0.15:0.15:0.15:0.15) is mixed in proportion; the above ...

Embodiment 2

[0030]1. the preparation of filler (1) (same as example 1)

[0031] 2. Application of nitrification bioactive filler ( 150 mg / L concentration )

[0032] Add 100 suspension balls prepared in 1. with filler (1) in the reactor with an effective volume of 100L, and finally form nitrifying bacteria embedded biologically active filler with a filling rate of 20%, water temperature of 25±2°C, HRT= 4h , the pH is 7.5-8.5, the dissolved oxygen is controlled at 4.0-5.0mg / L, and NH is prepared by using municipal sewage that has been placed for more than a week 4 + - Raw water with an N concentration of 150mg / L, the filler (1) is in a suspended fluidized state under the action of air lift, and the nitrification effect of the reactor is measured regularly. The test results of the effluent showed that the ammonia nitrogen oxidation rate of the reactor reached over 99% after 10 days of culture recovery, and the effluent NH 4 + -N concentration is below 1mg / L, the bioactive filler reac...

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Abstract

The invention discloses an efficient nitrification embedded bioactive filler and a preparation method thereof, which belong to the field of sewage and wastewater treatment. The nitrification embeddedbioactive filler comprises the following components in percentage by mass: 20-30% of PVA; 50% of a nitrobacteria concentrated solution; 15-20% of diatomite; 4-6% of 100-mesh wood activated carbon; 4-5% of calcium carbonate; and balance of 1% of an inorganic mixture; a colloidal embedding material is prepared, extruding is carried out to form a tube-strip-shaped extrudate, crosslinking is carried out in a saturated boric acid solution for 4 hours, and steps of cleaning, cutting, and soaking are carried out in a 5% sodium sulfate solution for 4 hours to form the final embedding filler product. The nitrification efficiency is improved, and the operation mode is simple and convenient.

Description

Technical field: [0001] The invention belongs to the field of sewage and wastewater treatment, in particular to a high-efficiency nitrification-embedded bioactive filler and a preparation method thereof. Background technique: [0002] At present, the treatment methods for ammonia nitrogen pollution and wastewater 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 method. In the traditional activated sludge method, the amount of bacteria is maintained by sludge reflux. In order 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 lim...

Claims

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Application Information

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IPC IPC(8): C02F3/08C02F3/10C02F3/34C02F101/16
CPCC02F3/085C02F3/105C02F3/108C02F3/107C02F3/109C02F3/348C02F2101/16Y02W10/10
Inventor 杨宏
Owner BEIJING UNIV OF TECH
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