Anaerobic membrane bioreactor and application thereof in sewage treatment

[0005] Based on this, it is necessary to provide an anaerobic membrane bioreactor and its application in sewage treatment in view of ...

In one embodiment, the top of housing 100 is provided with the first biogas outlet 132, and the first biogas outlet 132 communicates with the gas collection device 134 outside the housing 100, and the organic matter in anaerobic sludge and sewage The biogas formed by the reaction is collected in the gas collection device 134 through the first biogas outlet 132 . The anaerobic membrane bioreactor can also include an aeration assembly, and the aeration assembly can include an aeration pipe 146 arranged at the bottom of the inner chamber, a second pipe body 144 connected to the aeration pipe 146 and an aeration pump 148, and the housing The top of 100 can also be provided with a second biogas outlet 142, the second biogas outlet 142 can communicate with the second pipe body 144, a part of the reactor formed in the inner cavity can be collected by the gas collection device 134, and a part can enter the aeration A gas source for aeration in the module. The aeration at the bottom of the inner cavity by the aeration component realizes the flow of anaerobic sludge and sewage inside the casing 100, improves mass transfer efficiency, and improves sewage degradation efficiency.

In one embodiment, there are at least two plate-shaped iron-based materials 300 in the housing 100, the hollow membrane body 200 is cylindrical, and the length of the hollow membrane body 200 is along the The vertical direction of the inner chamber extends, that is to say, the length of the water purification chamber extends along the vertical direction of the inner chamber. Along the direction perpendicular to the length of the hollow membrane body 200 , that is, along the horizontal direction of the inner cavity, the two plate-shaped iron-based materials 300 are respectively disposed on both sides of the hollow membrane body 200 . The plate-shaped iron-based material 300 is arranged on both sides of the hollow membrane body 200 to play the role of diversion. Under the action of the aeration component, the anaerobic sludge in the shell 100 can flow around the plate-shaped iron-based material 300 Carry out circulation flow, promote the mixing of anaerobic sludge and sewage, and speed up sewage treatment. The columnar shape of the hollow membrane body can be a square column, a cylinder or an irregular column. Here, the vertical direction of the inner cavity is the direction from the bottom of the inner cavity to the top of the inner cavity.

Please refer to Fig. 2, in one embodiment, described anaerobic membrane bioreactor can also comprise deflector 400, and the length of deflector 400 is arranged along the vertical direction of inner cavity, and described deflector The length of 400 may be greater than that of the iron-based material 300 , and the deflector 400 may be disposed on a side of the iron-based material 300 close to the inner surface of the casing 100 . In the vertical direction of the cavity, the top of the deflector 400 is closer to the top of the cavity than the top of the iron-based material 300, and the bottom of the deflector 400 is closer to the top of the cavity than the top of the iron-based material 300. The bottom end of the iron-based material 300 is closer to the bottom of the cavity. That is, both ends of the deflector 400 protrude from both ends of the iron-based material 300. Since the iron-based material 300 will be consumed to a certain extent during the sewage treatment process, the ability of the iron-based material 300 to resist fluid impact may be reduced. It will be affected to a certain extent. In order to reduce the load of the iron-based material 300, a separate deflector 400 is provided. The deflector 400 can be a material with high mechanical strength and does not participate in the degradation of sewage. The length of the deflector 400 is longer than the iron-based material 300, the top of the deflector 400 can be set higher than the top of the iron-based material 300, and the bottom of the deflector 400 can be set lower than the bottom of the iron-based material 300, Most of the impact force of anaerobic sludge and sewage can be shared on the deflector 400 , reducing the load on the iron-based material 300 . Moreover, the iron-based material 300 and the deflector 400 form a stepped diversion structure, which can increase the disturbance of anaerobic sludge and sewage, promote the circulation of anaerobic sludge in the inner cavity and the mixing of anaerobic sludge and sewage .

The anaerobic membrane bioreactor of the embodiment of the present invention is when carrying out sewage, can release volatile fatty acid in the organic matter anaerobic digestion and degradation process in sewage, and the zero-valent iron elemental meeting in anaerobic membrane bioreactor and volatilization Ferrous ions are formed by the reaction of fatty acids, which will be hydrolyzed in the anaerobic sludge and sewage mixture to produce Fe(OH)2 with flocculation. Catching, colloidal destabilization, etc. remove the dissolved or colloidal organic matter of membrane fouling in the sludge mixture, promote the growth of sludge floc particle size, and then improve the filterability of the sludge-sewage mixture and slow down the occurrence of membrane fouling Speed, prolong membrane fouling cycle. The zero-valent iron element used in the anaerobic membrane bioreactor of the embodiment of the present invention is a green and economical material. Compared with traditional industrial flocculants, the zero-valent ir...