Alcomycete symbiosis synergistic denitrification reaction device based on anaerobic ammonia oxidation

Abstract

The utility model provides an algal-bacterial symbiosis synergistic denitrification reaction device based on anaerobic ammonia oxidation, and relates to the technical field of wastewater treatment. The device comprises a reactor and a plurality of biological ribbons arranged in the reactor, a water inlet and a water outlet are formed in the two ends of the reactor respectively, the biological ribbons are vertically distributed in the reactor in the water flow direction and divide the reactor into a plurality of reaction spaces, and the two ends of the tops of the biological ribbons are fixed to the side wall of the reactor; and the height of the biological ribbon is lower than that of the reactor. The anaerobic ammonia oxidation-phycomycete symbiotic system is introduced into the reactor containing the biological ribbons, low-energy-consumption and low-emission treatment of low-C / N urban domestic sewage is achieved, the biological ribbons are selected as a loading material of the reactor, the interior of the reactor is provided with rich pore structures, and the biological ribbons are loaded on the reactor. A large amount of biological attachment surface area is provided for growth and reproduction of algae and other microorganisms in water, and a large amount of attachment sites and powerful growth conditions are provided, so that the sewage treatment effect is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of wastewater treatment, in particular to an algae-bacteria symbiotic and synergistic denitrification reaction device based on anaerobic ammonia oxidation. BACKGROUND

[0002] Biological denitrification is a process of converting organic nitrogen and ammonia nitrogen in wastewater into nitrogen gas under the action of microorganisms, which has the characteristics of economy, effectiveness, easy operation, no secondary pollution, etc. This process mainly includes three stages of ammonification, nitrification and denitrification.

[0003] Ammonification refers to the conversion of organic nitrogen in wastewater into ammonia nitrogen (NH3-N) through microbial action under anaerobic or anoxic conditions. Nitrification refers to the conversion of ammonia nitrogen into nitrite nitrogen (NO2-N) and nitrate nitrogen (NO3-N) through the action of nitrifying bacteria under aerobic conditions. This process includes two stages of nitrosation and nitrification, which are completed by nitrite bacteria and nitrifying bacteria. Denitrification refers to the reduction of nitrate nitrogen and nitrite nitrogen to nitrogen gas (N2) by denitrifying bacteria using carbon source as electron donor under anoxic conditions, thereby achieving nitrogen removal.

[0004] Anaerobic ammonia oxidation process, as a process widely mentioned in recent years, has good application prospect in the treatment of municipal wastewater. Anaerobic ammonia oxidation process refers to the process in which anaerobic ammonia oxidation bacteria (AnAOB) use CO2 as inorganic carbon source and NH4 + as electron donor to directly oxidize NO2 - to N2 under anaerobic conditions, thereby completing the denitrification process. The theoretical reaction equation is as follows:

[0005] NH4 + + 1.32NO2 - + 0.066HCO3 - + 0.13H + →0.26NO3- + 1.02N2+ 0.066CH2O 0.5 N 0.15 +2.03H2O 。

[0006] As can be seen from the above reaction equation, sufficient reaction substrates NH4 + and NO2 - are required to achieve anaerobic ammonia oxidation. However, the concentration of NH4 + is high and the concentration of NO2 - is almost zero in municipal wastewater. Therefore, the stable and sufficient source of NO2 - becomes a limiting bottleneck for the application of anaerobic ammonia oxidation technology in the field of treating municipal wastewater, resulting in low nitrogen removal rate of anaerobic ammonia oxidation technology in treating municipal wastewater. CONTENT OF THE UTILITY MODEL

[0007] In order to improve the NO2 - The content is low, which leads to the problem that the nitrogen removal rate of the anaerobic ammonia oxidation technology in treating urban domestic wastewater is not high. The application provides an algae-fungus symbiotic synergistic denitrification reaction device based on anaerobic ammonia oxidation.

[0008] The application provides an algae-fungus symbiotic synergistic denitrification reaction device based on anaerobic ammonia oxidation, which adopts the following technical scheme:

[0009] An algae-fungus symbiotic synergistic denitrification reaction device based on anaerobic ammonia oxidation comprises a reactor and a plurality of biological lifebelts arranged in the reactor. The reactor is respectively provided with a water inlet and a water outlet at two ends. The plurality of biological lifebelts are vertically distributed in the reactor along the water flow direction and separate the reactor into a plurality of reaction spaces. The top ends of the biological lifebelts are fixed to the side wall of the reactor, and the height of the biological lifebelts is lower than the height of the reactor.

[0010] Optionally, the number of the biological lifebelts is 3-9.

[0011] Optionally, the biological lifebelts are made of fiber material with a porous structure.

[0012] Optionally, the reactor is provided with a light source inside and / or around the reactor.

[0013] Optionally, the reactor is coated with a heating plate and a heat preservation layer outside. The heating plate is arranged between the outer wall of the reactor and the heat preservation layer.

[0014] Optionally, a plurality of dissolved oxygen detectors are arranged in the reactor and are uniformly distributed along the water flow direction.

[0015] Optionally, the device further comprises an adjusting tank. The adjusting tank is communicated with the water inlet through a water inlet pump. The front end of the adjusting tank is connected with a water distribution tank.

[0016] Optionally, the device further comprises a sedimentation tank. The sedimentation tank is communicated with the water outlet. The sedimentation tank is communicated with the adjusting tank through a backflow pump.

[0017] Optionally, the sedimentation tank is provided with a sludge discharge port at the bottom.

[0018] In summary, the application has at least one of the following beneficial effects:

[0019] 1、The application introduces an anaerobic ammonia oxidation-algal bacteria symbiotic system into a reactor containing biological streamers, realizes low-energy consumption and low-emission treatment of low C / N municipal sewage, and selects biological streamers as a load material, which is used to simulate plants in water and has rich pore structures inside, provides a large amount of biological attachment surface area for the growth and reproduction of algae and other microorganisms in water, provides a large number of attachment sites and strong growth conditions, thereby improving the treatment effect of sewage.

[0020] 2、The application uses chlorella as photosynthetic bacteria, which not only uses oxygen produced by photosynthesis to provide oxygen for heterotrophic bacteria, but also absorbs nitrogen, phosphorus and other nutrients in wastewater and anaerobic ammonia oxidation reaction organic products at the same time, for its own growth, to remove pollutants such as ammonia nitrogen (NH4 + -N), total nitrogen (TN) and chemical oxygen demand (COD) to improve its degradation capacity; in addition, chlorella improves the settling performance of anaerobic ammonia oxidation sludge through mucus production, particle aggregation, surface charge, biological adhesion, pH adjustment, oxygen supply, organic matter degradation and microbial community structure.

[0021] 3、The application further degrades organic matter by attaching heterotrophic bacteria such as nitrifying bacteria and denitrifying bacteria on the surface and inside of the biological streamers, and uses oxygen produced by chlorella photosynthesis to oxidize residual ammonia nitrogen; under anaerobic conditions inside the biological streamers, anaerobic ammonia oxidation bacteria convert ammonia nitrogen (NH4 + -N) and nitrite nitrogen (NO2 - -N) in wastewater into nitrogen (N2), thereby achieving efficient denitrification effect.

[0022] 4、The application uses oxygen produced by chlorella photosynthesis to replace aeration, maximally reduces energy consumption, and does not need to add carbon source, thereby reducing denitrification cost and carbon emission, so it shows full superiority in treating low C / N municipal sewage, and the method does not need COD removal pretreatment, thereby improving the overall denitrification effect of the system. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a connection relationship diagram of an anaerobic ammonia oxidation-based algal bacteria symbiotic collaborative denitrification reaction device according to an embodiment of the application;

[0024] Figure 2 is Figure 1 a process flow diagram of the anaerobic ammonia oxidation-based algal bacteria symbiotic collaborative denitrification reaction device shown in

[0025] In the figure: 1, water distribution tank; 2, adjusting pool; 3, reactor; 4, LED energy-saving lamp strip; 5, dissolved oxygen detector; 6, sedimentation tank; 7, biological floating belt; 8, reflux pump; 9, water inlet pump; 10, heating plate; 11, water inlet; 12, water outlet. DETAILED DESCRIPTION

[0026] Reference Figures 1-2 , one embodiment of the present application provides an anaerobic ammonia oxidation-based algae-bacteria symbiotic synergistic denitrification reaction device, which comprises a reactor 3 and a plurality of biological floating belts 7 arranged in the reactor 3. The reactor 3 is made of organic glass, with a length of 40 cm, a width and a height of 15 cm, a volume of 9 L, and an effective volume of 7.8 L. The reactor 3 has a sealable upper cover, which facilitates the collection of water samples and the replacement of fillers in different reaction spaces. The reactor 3 is provided with a water inlet 11 and a water outlet 12 at both ends, and the water flow direction in the reactor 3 can be determined by the water inlet 11 and the water outlet 12.

[0027] As shown in Figure 2 , the plurality of biological floating belts 7 are vertically distributed in the reactor 3 along the water flow direction and divide the reactor 3 into a plurality of reaction spaces. The top ends of the biological floating belts 7 are fixed to the side walls of the reactor 3, and the height of the biological floating belts 7 is lower than the height of the reactor 3.

[0028] In a preferred embodiment, the number of biological floating belts 7 can be 3-9. Referring to Figure 2 , the reactor 3 in this embodiment is provided with six biological floating belts 7, thereby dividing the reactor 3 into seven reaction spaces.

[0029] The biological floating belt 7 is made of a fiber cloth strip with a porous structure, with a length of 15 cm and a width of 13 cm, which is used to simulate water grass in water bodies and provide attachment points for microorganisms. The advantages are that algae and microorganisms are easier to attach, the biofilm forms faster, the price is low, and the cost performance is outstanding. It should be particularly noted that the biological floating belt 7 used in the present application is purchased from Xiangtan Yunfan New Material Co., Ltd.

[0030] Referring to Figure 1 or Figure 2 , a light source is arranged inside and / or around the reactor 3, which can be specifically an LED energy-saving lamp strip 4, which is used to simulate sunlight to ensure that the algae and microorganisms in the reactor 3 grow in suitable conditions.

[0031] In a preferred embodiment of the present application, the reactor 3 is wrapped with a heating plate 10 and a heat preservation layer (not shown in the figure), and the heating plate 10 is arranged between the outer wall of the reactor 3 and the heat preservation layer. At the same time, the reactor 3 is wrapped with the heating plate 10, which is used to adjust the temperature in the reactor 3, so that the temperature is maintained at 30±2℃. Since light has a certain inhibitory effect on anaerobic ammonia oxidation bacteria, the heat preservation layer can also play a role in shading.

[0032] Referring to Figure 2 , the reactor 3 is provided with a plurality of dissolved oxygen detectors 5, and the plurality of dissolved oxygen detectors 5 are uniformly distributed along the water flow direction. The growth position and quantity of chlorella in each reaction space can be controlled by inoculating the quantity of chlorella and light, so as to control the dissolved oxygen concentration in the reactor 3, so as to promote the reaction.

[0033] As Figure 1 or Figure 2 , the reaction device further comprises an adjusting tank 2 located at the water inlet 11 of the reactor 3 and a sedimentation tank 6 located at the water outlet 12 of the reactor 3, the adjusting tank 2 is communicated with the water inlet 11 of the reactor 3 through a water inlet pump 9, the sedimentation tank 6 is communicated with the water outlet 12 of the reactor 3, and the sedimentation tank 6 is communicated with the adjusting tank 2 through a backflow pump 8, and the front end of the adjusting tank 2 is connected with a water distribution tank 1.

[0034] As Figure 1 or Figure 2 , the sedimentation tank 6 is provided with a sludge discharge port at the bottom, and part of the sludge discharged from the sludge discharge port can be backflowed into the reactor 3 to supplement the microbial concentration lost in the reactor 3.

[0035] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape, principle of the present application shall be covered within the protection scope of the present application.

Claims

1. An algae-bacteria symbiotic synergistic denitrification reaction device based on anaerobic ammonia oxidation, characterized in that, The application relates to a reactor (3) and a plurality of biological streamers (7) arranged in the reactor (3), wherein the reactor (3) is provided with a water inlet (11) and a water outlet (12) at two ends respectively, the plurality of biological streamers (7) are vertically distributed in the reactor (3) along the water flow direction and separate the reactor (3) into a plurality of reaction spaces, the top ends of the biological streamers (7) are fixed to the side walls of the reactor (3), and the height of the biological streamers (7) is lower than the height of the reactor (3). The number of the biological streamers (7) is 3-9.

2. The ANAMMOX-based algal-bacterial symbiotic synergistic denitrification reaction device according to claim 1, characterized in that, The biological streamers (7) are made of fiber materials with porous structures. 3.The canobionic algae-bacteria symbiotic synergistic denitrification reaction device based on anammox according to claim 1, characterized in that, The reactor (3) is provided with light sources inside and / or around the reactor (3). 4.The canobio-synergetic denitrification reaction device based on anammox according to claim 1, characterized in that, The reactor (3) is coated with a heating plate (10) and a heat preservation layer, and the heating plate (10) is arranged between the outer wall of the reactor (3) and the heat preservation layer.

5. The ANAMMOX-based algal-bacterial symbiotic synergistic denitrification reaction device according to claim 1, characterized in that, A plurality of dissolved oxygen detectors (5) are arranged in the reactor (3) and are uniformly distributed along the water flow direction.

6. The CANON-based algal-bacterial symbiotic synergistic nitrogen removal reaction apparatus according to claim 5, characterized in that, The application further comprises an adjusting pool (2) which is communicated with the water inlet (11) through a water inlet pump (9), and the front end of the adjusting pool (2) is connected with a water distribution tank (1).

7. The CANON-based algal-bacterial symbiotic synergistic nitrogen removal reaction device according to any one of claims 1-6, characterized in that, The application further comprises a sedimentation pool (6) which is communicated with the water outlet (12) and communicated with the adjusting pool (2) through a backflow pump (8). 8.The CANON-based algal-bacterial symbiotic synergistic nitrogen removal reaction device according to claim 7, characterized in that, The sedimentation pool (6) is provided with a sludge discharge port at the bottom. 9.The CANON-based algal-bacterial symbiotic synergistic nitrogen removal reaction device according to claim 8, characterized in that, ​

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