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Preparation and application of a high accumulation rate short-range nitrification composite bacteria-embedded bioactive filler

A technology of short-range nitrification and biological activity, which is applied in the field of preparation and application of high-accumulation rate short-range nitrification compound bacteria-embedded bioactive fillers, can solve the problems of high efficiency, production cost and production efficiency, and high technical requirements, and achieve reduction Small requirements, improved stability, and excellent hydraulic conditions

Active Publication Date: 2022-03-29
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.
[0006] In recent years, we have used the embedding technology in (ZL201410137401.1) to produce ammonia oxidation-embedded bioactive fillers. We have carried out pilot and productive application tests by using the net-shaped straight cylindrical ammonia oxidation-embedded bioactive fillers. , the filler is found in the process of making and using the filler, and there is a large room for improvement in the preparation process, manufacturing cost and complexity of the filler structure

Method used

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  • Preparation and application of a high accumulation rate short-range nitrification composite bacteria-embedded bioactive filler

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1. Preparation of filler

[0026] Using the returned sludge from the urban sewage plant as the source of the bacteria, the short-range nitrifying bacteria were cultured in a directional way, and the short-path nitrifying bacteria suspension was concentrated by centrifugation and dehydration after enrichment and screening to obtain a culture of short-range nitrifying bacteria with a moisture content of 80%. There is a sewage treatment plant with nitrification ability to return sludge (water content 99%), the sediment is concentrated to a water content of 97%, and added to the bacterial culture tank, the volume is 1 / 3 of the effective volume of the culture tank; at a low temperature of 100r / min Under the condition of strong stirring, add ammonia nitrogen, the dosage of ammonia nitrogen is controlled to keep the concentration of free ammonia in the range of 16-18mg / L under a certain pH condition, and this state is maintained for 24 hours; then, start to introduce air for ae...

Embodiment 2

[0032] 1. short-range nitrifying bacteria culture culture and filler preparation (same as example 1)

[0033] 2. Application of short-range nitrification embedded active filler (municipal sewage)

[0034] The reactor continues the experiment of Example 1, the water temperature is 25±2°C, HRT=3h, and the pH is 6.8-7.3 (manual control is removed); the municipal sewage is used as the raw water, the reactor runs continuously for 24 hours a day, and the ammonia nitrogen in the reactor is measured every day Oxidation, nitrite and nitrate production. The test results of the effluent showed that the nitrite accumulation rate reached 91.6%, the ammonia nitrogen in the effluent was less than 1mg / L, and the biologically active filler reaction tank was continuously operated for nearly 4 months, and the biochemical effect was stable.

[0035] Effects of the present invention: 1. The wall thickness of the embedding filler is 1.5-2.5 mm. Under the premise of maintaining good permeability, t...

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Abstract

The invention relates to the preparation and application of a high-accumulation-rate short-range nitrification composite bacteria-embedded bioactive filler, which belongs to the field of sewage and wastewater treatment. Using advanced control methods, optimize and strengthen the cultivation of composite bacteria with a high proportion of AOB bacteria content, and then use bacterial embedding technology to make short-range nitrification embedded bioactive fillers, that is, to strengthen short-range nitrification composite bacteria-embedded bioactive fillers, and use this filler to establish short-range nitrification. The nitrification reaction process can realize the short-range nitrification control of nitrogenous pollution and wastewater biological treatment. The result is a simple and efficient process without complicated control process.

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 short-range nitrification compound bacteria-embedded bioactive filler with high accumulation rate. Background technique: [0002] In the biological treatment of nitrogenous pollution and wastewater, the nitrification reaction is completed by the joint action of ammonia oxidizing bacteria (AOB) and nitrite oxidizing bacteria (NOB). AOB oxidizes ammonia nitrogen into nitrite nitrogen, and NOB further converts nitrous into nitric acid. salt nitrogen. Short-range nitrification is also called nitrosation. This process can reduce 25% of nitrification oxygen demand, 40% of denitrification carbon source, 50% of sludge production and denitrification tank volume in the whole denitrification process. Based on the above advantages, the short-cut nitrification reaction control, that is, the high nitrite accumulation rate in the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12N11/04C02F3/10C02F3/14C02F101/16
CPCC02F3/109C02F3/105C02F3/108C02F3/348C02F2101/16Y02W10/10
Inventor 杨宏
Owner 天朝环境科技(北京)有限公司
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