Nitrogen and phosphorus removing MNBR biofiller
A biological filler, nitrogen and phosphorus removal technology, applied in the direction of sustainable biological treatment, biological water/sewage treatment, water pollutants, etc., can solve problems such as uneven distribution of water and air, clogging of water outlet grids, clogging of filter materials, etc. , to achieve the effects of accelerated formation and adhesion, fast film formation, and strong impact resistance
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Embodiment 1
[0026] Such as Figure 1-2 As shown, the present invention provides a MNBR biological filler for denitrification and phosphorus removal. The biological filler is cylindrical as a whole; the biological filler includes: an inner ring layer 1, a middle ring layer 2, an outer ring layer 3, and a filler matrix; the filler matrix includes a membrane shell Skeleton 4, tie bars 5, central axis 6; outer ring layer 3 is set on the periphery of the packing matrix; central axis 6 runs through the entire packing matrix up and down; tie bars 5 are supported between the central axis 6 and middle ring layer 2; inner ring layer 1 Set in the middle of the membrane shell skeleton 4; the middle ring layer 2 is set on the periphery of the inner ring layer 1; the middle ring layer 2 is filled with three-dimensional porous fibers; the outer ring layer 3 is radially distributed filamentary fibers 7; the outer ring layer 3 is provided with 8 sets of filaments Shaped fiber 7; Each group of filamentous ...
Embodiment 2
[0040] Biological filler structure is the same as embodiment one
[0041] The filler matrix includes the following raw materials in parts by weight: 45 parts of polypropylene, 32 parts of polyvinyl chloride, 14 parts of polyvinyl alcohol, 5 parts of polyacrylamide, 2 parts of antioxidant, and the antioxidant is 1:0.03:0.6 in mass ratio A composition of molecular sieves, 2,6-di-tert-butyl-p-cresol and boron nitride;
[0042] The preparation method of filler matrix comprises the following steps:
[0043] S1. Molecular sieves, 2,6-di-tert-butyl-p-cresol and boron nitride are jointly added to a fine grinder according to the mass ratio, and fully ground for 0.4h to obtain an antioxidant;
[0044] S2. Add the polypropylene, polyvinyl chloride, polyvinyl alcohol, polyacrylamide and antioxidant of the specific gravity into the high mixer, and mix thoroughly to obtain a mixture;
[0045] S3. Add the mixture to a twin-screw extruder, and melt and extrude it at a temperature of 200°C t...
Embodiment 3
[0048] Biological filler structure is the same as embodiment one
[0049] The filler matrix includes the following raw materials in parts by weight: 50 parts of polypropylene, 40 parts of polyvinyl chloride, 18 parts of polyvinyl alcohol, 8 parts of polyacrylamide, 3 parts of antioxidant, and the antioxidant is a mass ratio of 1:0.05:0.8 A composition of molecular sieves, 2,6-di-tert-butyl-p-cresol and boron nitride;
[0050] The preparation method of filler matrix comprises the following steps:
[0051] S1. Molecular sieves, 2,6-di-tert-butyl-p-cresol and boron nitride are added to a fine grinder according to the mass ratio, and fully ground for 0.5h to obtain an antioxidant;
[0052] S2. Add the polypropylene, polyvinyl chloride, polyvinyl alcohol, polyacrylamide and antioxidant of the specific gravity into the high mixer, and mix thoroughly to obtain a mixture;
[0053] S3. Add the mixture to a twin-screw extruder, melt and extrude it at a temperature of 220°C to make a p...
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