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Ammonia oxidizing bacterium enriching device and method suitable for purifying micro-polluted water and application of ammonia oxidizing bacterium enriching device and method

A technology for ammonia oxidizing bacteria and micro-polluted water, which is applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., and can solve the problem that the ammonia-oxidizing bacteria enrichment and cultivation device cannot be used for micro-polluted water purification. and other problems, to achieve the effect of broad spectrum applicability, short enrichment time and high concentration

Active Publication Date: 2014-04-09
CHENGDU DUCHENG ENVIRONMENTAL PROTECTION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the existing ammonia oxidizing bacteria enrichment culture device and method cannot be applied to the purification of slightly polluted water, the present invention provides an ammonia oxidizing bacteria enrichment device, method and application suitable for the purification of slightly polluted water. The device and The method can realize the rapid enrichment of ammonia oxidizing bacteria, and the enriched ammonia oxidizing bacteria can be used in the raw water pipeline or water treatment process of slightly polluted water, and the removal rate of ammonia nitrogen in slightly polluted water can reach more than 83%. The method can also be applied to basic experimental research on ammonia oxidizing bacteria in slightly polluted water

Method used

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  • Ammonia oxidizing bacterium enriching device and method suitable for purifying micro-polluted water and application of ammonia oxidizing bacterium enriching device and method
  • Ammonia oxidizing bacterium enriching device and method suitable for purifying micro-polluted water and application of ammonia oxidizing bacterium enriching device and method
  • Ammonia oxidizing bacterium enriching device and method suitable for purifying micro-polluted water and application of ammonia oxidizing bacterium enriching device and method

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Experimental program
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Effect test

Embodiment 1

[0045] The simulation pipeline for raw water delivery uses polyethylene pipes. The inner and outer diameters of the polyethylene pipes are 20mm and 24mm respectively. When the average concentration of ammonia nitrogen in the raw water transportation simulation pipeline is 2.5mg / L, the average water temperature is 25°C, the average dissolved oxygen concentration is 4.9mg / L, the average pH value is 7.3, and the hydraulic retention time is 1h, the raw water transportation The average removal rate of ammonia nitrogen in the simulated pipeline is 53%. According to Zhou Lingling et al. (Zhou Lingling, Zhang Yongji, Yang Yanling, Li Guibai; a method for measuring the number of adherent heterotrophic bacteria colonies; ZL200810064710.5) for the treatment of adherent heterotrophic bacteria, the present invention is attached to the polyethylene cylinder The ammonia oxidizing bacteria in the biofilm were prepared as ammonia oxidizing bacteria suspension for inoculation, and the scraping ...

Embodiment 2

[0047] The ultrafiltration membrane module adopts polyvinylidene fluoride central control fiber membrane, the nominal pore size is 0.01um, the inner and outer diameters of the membrane wire are 0.85um and 1.45um respectively, the hydraulic retention time is 0.5h, and the average ammonia nitrogen in the ultrafiltration membrane module The concentration is 1.2mg / L, the average water temperature is 25°C, the average dissolved oxygen concentration is 3.7mg / L, and the average pH value is 7.2. The average removal rate of ammonia nitrogen by the ultrafiltration membrane module is 23% during stable operation. According to Zhou Lingling et al. (Zhou Lingling, Zhang Yongji, Yang Yanling, Li Guibai; a method for measuring the number of adherent heterotrophic bacteria colonies; ZL200810064710.5) for the treatment of adherent heterotrophic bacteria, the present invention is attached to the polyethylene cylinder The ammonia oxidizing bacteria in the biofilm were prepared into ammonia oxidizi...

Embodiment 3

[0049] The tap water was taken from the laboratory, and the number of ammonia oxidizing bacteria in the tap water was determined to be 45MPN / mL. The tap water is air-dried to remove chlorine, and according to the treatment method of attached heterotrophic bacteria by Zhou Lingling et al. The ammonia oxidizing bacteria in the biofilm in the polyethylene cylinder was prepared as an ammonia oxidizing bacteria suspension for inoculation, and the area value of the ammonia oxidizing bacteria biofilm was scraped (cm 2 ) to scrape according to 10% of the tap water volume (L). After inoculation, cultivate in dark, and measure the number of ammonia oxidizing bacteria in tap water at 0h, 6h, 12h, 24h, 48h, and 72h of inoculation. The changes of ammonia oxidizing bacteria in tap water with the inoculation time are as follows: Figure 5 shown. from Figure 5 It can be seen from the figure that after the inoculation of ammonia oxidizing bacteria, the number of ammonia oxidizing bacteria ...

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Abstract

The invention discloses an ammonia oxidizing bacterium enriching device and method suitable for purifying micro-polluted water and an application of the ammonia oxidizing bacterium enriching device and method, belonging to the technical field of feed water treatment. The device comprises an ammonia oxidizing bacterium enriching reactor, an ammonia oxidizing bacterium culture solution storage tank and an ammonia oxidizing bacterium nutrition control system. Ammonia oxidizing bacteria are inoculated, an ammonia oxidizing bacterium culture solution is used as the inflow water of the ammonia oxidizing bacterium enriching reactor, and the ammonia oxidizing bacterium nutrition control system is used for maintaining the dissolved oxygen concentration at 5-7mg / L, the pH value at 8.0-8.5 and the ammonia nitrogen concentration at 4-8 mg / L in the culture process, so that an ammonia oxidizing bacterium biofilm grows and attaches a polyethylene cylinder of the ammonia oxidizing bacterium enriching reactor. The concentration of ammonia oxidizing bacteria enriched by using the device and the method is high; when the device and the method are applied to a raw water pipe or water treatment process unit of micro-polluted water, the biological nitrogen removal effect can be effectively improved, and the ammonia nitrogen removal load of a water plant is greatly relieved; the device and the method have the advantages of simple operation, short enriching time and convenience for applying strains.

Description

technical field [0001] The invention belongs to the technical field of water supply treatment, and in particular relates to an ammonia oxidizing bacteria enrichment device, method and application suitable for purifying slightly polluted water. Background technique [0002] At present, my country's urbanization and industrialization are developing rapidly. At the same time, due to the lack of effective supervision and management, the pollutants discharged into natural water show an increasing trend. The eutrophication of water bodies is one of the current problems that need to be solved urgently. The adverse impact on the environment directly increases the pollution removal load of subsequent water purification plants. [0003] In recent years, studies have found that nitrification is prone to occur in water supply pipe networks with high ammonia nitrogen content, which has brought a series of adverse effects on water quality. Therefore, it is particularly important to enhance...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/34
Inventor 杨艳玲相坤李星张达
Owner CHENGDU DUCHENG ENVIRONMENTAL PROTECTION CO LTD
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