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Preparation and application of a kind of denitrification and denitrification embedded bio-ring active packing

An active filler, nitrification and denitrification technology, applied in biochemical equipment and methods, biological water/sewage treatment, water pollutants, etc., can solve problems such as difficult high efficiency, high technical requirements, production cost and production efficiency , to achieve the effect of good fluidization state, single weight reduction, and reduction of requirements

Active Publication Date: 2022-03-22
天朝环境科技(北京)有限公司
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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 and application of a kind of denitrification and denitrification embedded bio-ring active packing

Examples

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 relates to the preparation and application of a denitrification and denitrification embedded bio-annular active filler, which belongs to the field of sewage and wastewater treatment. The mass percentage composition of raw materials for embedding materials: PVA 20‑30%; denitrifying bacteria concentrate 50%; diatomite 15‑20%; 100 mesh wood activated carbon 4‑6%; calcium carbonate 4‑5%; the rest 1% It is a mixture of inorganic substances; then add materials according to the above-mentioned components and add them to PVA hydrosol to make colloidal embedding materials; extrude tube strips, place them in saturated boric acid solution for glue connection, clean and cut, and place them in 5 % sodium sulfate solution for soaking and cleaning to form the final embedding filler product. It can strengthen the denitrification reaction of denitrifying bacteria.

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 Patents(China)
IPC IPC(8): C12N11/04C12N11/084C02F3/28C02F3/34C02F101/16
CPCC02F3/2806C02F3/348C02F2101/163
Inventor 杨宏
Owner 天朝环境科技(北京)有限公司
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