Excess sludge reduction bioreactor with variable aeration and worm attachment oblique plate

Abstract

The invention discloses an excess sludge reduction bioreactor with variable aeration and a worm attachment oblique plate, which relates to a bioreactor for excess sludge reduction. The bioreactor solves the problems that that the conventional excess sludge reduction device has low oxygen utilization rate, poor aeration adjustment, easy worm drop, low growth density of worm colony, difficult discharge of inert substances and the like. An automatic gas flow adjustor which is well arranged can automatically adjust the air flow entering a plurality of variable micropore aeration pipes according to the dissolved oxygen concentration of sludge mixed solution in a container, thereby realizing variable aeration for the sludge mixed solution in the container; the dissolved oxygen concentration of the sludge mixed solution can be kept at the maximum dissolved oxygen concentration of the worm sludge reduction through the variable aeration; and a plurality of variable aperture vent holes are uniformly distributed on the variable micropore aeration pipes, and the variable range of the diameters of the vent holes is 0.2 to 0.8 millimeter. The excess sludge reduction bioreactor integrates the worm attachment oblique plate and the variable aeration so as to greatly improve the sludge reduction effect, and the sludge reduction reaches over 90 percent.

Description

technical field

[0001] The invention relates to a bioreactor for reducing excess sludge, which belongs to the technical field of treating excess sludge with biological technology. Background technique

[0002] At present, more than 80% of the sewage treatment plants in the world use the activated sludge method to treat domestic sewage, but it has always had a big disadvantage, that is, a large amount of excess sludge will be generated during sewage treatment. The amount of residual sludge produced by the sewage treatment plant is about 0.5% to 1% of the volume of the treated water, which is a huge amount. Excess sludge also contains a large amount of organic matter, various bacteria, viruses and parasites, and may concentrate heavy metal inorganic compounds such as zinc, copper, lead and cadmium, as well as toxic organic compounds. Improper treatment will cause serious environmental pollution problems. With the development of sewage treatment, the total water volume and tre...

Examples

specific Embodiment approach 1

[0017] Specific implementation mode one: the following combination Figure 1 to Figure 3 Specifically illustrate this embodiment, the residual sludge reduction bioreactor with variable aeration and worm attachment sloping plate described in this embodiment includes a container 6, a mud bucket 7 and a baffle 2; the bioreactor also includes A plurality of worms are attached to the inclined plate 4 and the variable aeration device 5; the mud bucket 7 is positioned at the bottom of the container 6 and the two are connected as one, the upper end of the side wall of the container 6 has an inlet 6-1, and the bottom of the mud bucket 7 has a The outlet 6-2, the baffle plate 2 is arranged in front of the entrance 6-1 in the container 6, and a plurality of worm attachment sloping plates 4 are layered and staggered evenly arranged inside the container 6 along the height direction, and each worm attachment slanting plate 4 is made of filler plate 4-1, fixed shaft 4-2 and packing layer 4-3...

specific Embodiment approach 2

[0019] Specific implementation mode two: the following combination Figure 1 to Figure 3 This embodiment is specifically described. The thickness of the filler layer 4-3 in this embodiment is 1.0-1.2 cm. Other components and connections are the same as those in the first embodiment.

specific Embodiment approach 3

[0020] Specific implementation mode three: the following combination Figure 1 to Figure 3Describe this embodiment in detail. The packing layer 4-3 in this embodiment is made of polyethylene material. There are a large number of holes or gaps with a diameter or width of 2-3 mm evenly distributed on the packing layer 4-3. The large number of holes or The slits criss-cross and communicate up and down, that is, the packing layer 4-3 is a net-like porous packing layer for carrying worms; benthic worms are used as sludge predators, and they are inoculated and fixed in porous worms according to their physiological characteristics. Sexual filler 3 inside. This porous packing 3 has simulated the natural living environment of worms-bottom mud (filling layer 4-3 is similar to the natural living environment of worms), adapts to the drilling characteristics of worms, and worms can freely move in the porous packing Crawl and drill holes. This kind of porous filler can also help the worms...

technical field

[0001] The invention relates to a bioreactor for reducing excess sludge, which belongs to the technical field of treating excess sludge with biological technology. Background technique

[0002] At present, more than 80% of the sewage treatment plants in the world use the activated sludge method to treat domestic sewage, but it has always had a big disadvantage, that is, a large amount of excess sludge will be generated during sewage treatment. The amount of residual sludge produced by the sewage treatment plant is about 0.5% to 1% of the volume of the treated water, which is a huge amount. Excess sludge also contains a large amount of organic matter, various bacteria, viruses and parasites, and may concentrate heavy metal inorganic compounds such as zinc, copper, lead and cadmium, as well as toxic organic compounds. Improper treatment will cause serious environmental pollution problems. With the development of sewage treatment, the total water volume and tre...

Examples

specific Embodiment approach 1

[0017] Specific implementation mode one: the following combination Figure 1 to Figure 3 Specifically illustrate this embodiment, the residual sludge reduction bioreactor with variable aeration and worm attachment sloping plate described in this embodiment includes a container 6, a mud bucket 7 and a baffle 2; the bioreactor also includes A plurality of worms are attached to the inclined plate 4 and the variable aeration device 5; the mud bucket 7 is positioned at the bottom of the container 6 and the two are connected as one, the upper end of the side wall of the container 6 has an inlet 6-1, and the bottom of the mud bucket 7 has a The outlet 6-2, the baffle plate 2 is arranged in front of the entrance 6-1 in the container 6, and a plurality of worm attachment sloping plates 4 are layered and staggered evenly arranged inside the container 6 along the height direction, and each worm attachment slanting plate 4 is made of filler plate 4-1, fixed shaft 4-2 and packing layer 4-3...

specific Embodiment approach 2

[0019] Specific implementation mode two: the following combination Figure 1 to Figure 3 This embodiment is specifically described. The thickness of the filler layer 4-3 in this embodiment is 1.0-1.2 cm. Other components and connections are the same as those in the first embodiment.

specific Embodiment approach 3

[0020] Specific implementation mode three: the following combination Figure 1 to Figure 3Describe this embodiment in detail. The packing layer 4-3 in this embodiment is made of polyethylene material. There are a large number of holes or gaps with a diameter or width of 2-3 mm evenly distributed on the packing layer 4-3. The large number of holes or The slits criss-cross and communicate up and down, that is, the packing layer 4-3 is a net-like porous packing layer for carrying worms; benthic worms are used as sludge predators, and they are inoculated and fixed in porous worms according to their physiological characteristics. Sexual filler 3 inside. This porous packing 3 has simulated the natural living environment of worms-bottom mud (filling layer 4-3 is similar to the natural living environment of worms), adapts to the drilling characteristics of worms, and worms can freely move in the porous packing Crawl and drill holes. This kind of porous filler can also help the worms...

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