A multi-stage water drop biological tower treatment device

Abstract

The invention relates to a multi-stage water-drop biological tower treatment device, comprising a tower body, a water distribution component, a water-drop purification component, a biological annular plate and a water outlet pipe; the outer wall of the tower body is a conical surface which is narrow at the top and wide at the bottom, and the interior of the tower body is provided with a hydrolysis acidification chamber; the water distribution component comprises a water inlet end and a water outlet end, the water inlet end is externally connected to sewage, and the water outlet end is communicated with the hydrolysis acidification chamber; the water-drop purification component comprises a plurality of water-drop annular plates which are sequentially arranged in a top-to-bottom direction, the plurality of water-drop annular plates are coaxially sleeved on the tower body, the upper part of the water-drop annular plates and the conical surface are combined to form a water-drop annular groove, and the water-drop annular groove is filled with filter material; the biological annular plate is located at the bottom of the water-drop purification component, the biological annular plate is sleeved on the tower body, the top of the biological annular plate and the tower body are combined to form a biological annular groove; the water outlet pipe is communicated with the biological annular groove; the problem that the existing water treatment technology cannot simultaneously meet the requirements of small footprint, low operating cost and simple maintenance and management is solved.

Description

Technical Field

[0001] The invention relates to the technical field of water treatment, and in particular to a multi-stage water-falling biological tower treatment device. Background Art

[0002] At present, for medium and low concentration organic polluted wastewater similar to domestic sewage, such as rural domestic sewage, aquaculture wastewater, domestic sewage in tourist attractions, etc., due to the small amount of sewage in the project, the remote geographical location, and the inability to be covered by the sewage collection network, the method of on-site treatment is generally adopted. Commonly used treatment technologies include: artificial wetland, MBR membrane bioreactor, ordinary activated sludge method, etc.

[0003] However, artificial wetlands have limitations such as large footprint, easy clogging of wetland fillers, and treatment effects greatly affected by climate; the MBR process has problems such as many equipment (ultrafiltration membrane components, aeration equipment, sludge return equipment, water production pumps, cleaning equipment, etc.), high investment and operating costs, and complex operation and control; the ordinary activated sludge method has problems such as more equipment (aeration and oxygenation equipment, sedimentation tanks and sludge return equipment), long bacterial cultivation time, high requirements for operation and management technology, and easy generation of sludge bulking during operation.

[0004] Therefore, for this type of low-to-medium concentration organic polluted wastewater located in remote areas and lacking professional operation and management personnel, the existing water treatment technology cannot simultaneously meet the requirements of small footprint, low operating costs, and simple maintenance and management. Summary of the invention

[0005] In view of this, it is necessary to provide a multi-stage waterfall biological tower treatment device to solve the problem that the existing water treatment technology cannot simultaneously meet the requirements of small footprint, low operating costs, and simple maintenance and management.

[0006] The present invention provides a multi-stage water-drop biological tower assembly for sewage treatment, comprising a tower body, a water distribution component, a water-drop purification component, a biological annular plate and a water outlet pipe; the outer wall of the tower body is a conical surface that is narrow at the top and wide at the bottom, and the interior of the tower body is provided with a hydrolysis acidification chamber; the water distribution component comprises an inlet end and a water outlet end, the inlet end is externally connected to sewage, and the water outlet end is connected to the hydrolysis acidification chamber; the water-drop purification component comprises a plurality of water-drop annular plates arranged in sequence from top to bottom, and the plurality of water-drop annular plates are coaxially sleeved on the tower body. The tower body is provided with a water film on the conical surface and the water drop annular plate so that the sewage overflowing from the top of the hydrolysis and acidification chamber can form a water film. The top of the water drop annular plate and the conical surface together form a water drop annular groove, and the water drop annular groove is filled with filter material. The biological annular plate is located at the bottom of the water drop purification component, and the biological annular plate is sleeved on the tower body. The top of the biological annular plate and the tower body together form a biological annular groove, and a pebble layer is laid in the biological annular groove. The water inlet of the outlet pipe extends into the pebble layer.

[0007] Furthermore, the tower body is in the shape of a hollow truncated cone, the cross-sectional area of ​​the tower body is small at the top and large at the bottom, the hydrolysis and acidification chamber is a conical cavity which is small at the top and large at the bottom, and biologically activated sludge is added into the tower body.

[0008] Furthermore, the water distribution assembly includes a water inlet pipe and a water distributor, the water distributor is built into the bottom of the hydrolysis acidification chamber, one end of the water inlet pipe is connected to the sewage lifting pump, and the other end of the water inlet pipe is connected to the water distributor.

[0009] Furthermore, the water distributor includes a water distribution main pipe and two water distribution branch pipe groups. The water distribution main pipe is horizontally built-in at the bottom of the hydrolysis acidification chamber, the water distribution main pipe is connected to the water inlet pipe, and the two water distribution branch pipe groups are symmetrically arranged on both sides of the water distribution main pipe. Each of the water distribution branch pipe groups includes multiple water distribution branches, and the multiple water distribution branches in each water distribution branch pipe group are arranged in sequence along the length direction of the water distribution branch pipe. The water distribution branch pipe is connected to the water distribution main pipe, and the water distribution branch pipe is arranged perpendicular to the water distribution main pipe, and the two sides of the water distribution branch pipe are staggered and opened obliquely downward.

[0010] Furthermore, the annular plate for water drop includes an annular inclined plate and an annular vertical plate, the annular inclined plate is arranged obliquely upward from the inside to the outside, the inner wall of the annular inclined plate is connected to the conical surface of the tower body, the outer wall of the annular inclined plate is connected to the bottom of the annular vertical plate, and the annular inclined plate, the annular vertical plate and the conical surface of the tower body form the annular groove for water drop.

[0011] Furthermore, the angle between the bottom of the annular inclined plate and the conical surface is 100-110 degrees.

[0012] Furthermore, the vertical height difference between two adjacent drop ring grooves is 700-900 mm.

[0013] Furthermore, the filter material is polyurethane sponge ball biological filler, and the filling amount of the polyurethane sponge ball biological filler is 2 / 3 of the volume of the waterfall annular groove.

[0014] Furthermore, the bottom of the biological annular plate and the bottom of the tower body are located in the same horizontal plane.

[0015] Furthermore, the water inlet of the water outlet pipe is trumpet-shaped.

[0016] Compared with the prior art, the tower body is provided with a hydrolysis acidification chamber, so that the anaerobic hydrolysis acidification process can be realized, and the sewage overflowing from the top of the hydrolysis acidification chamber forms a water film on the conical surface of the tower body and the waterfall annular plate, so that the biofilm process can be realized. At the same time, water-loving plants can be planted in the waterfall annular groove, and ornamental fish that feed on residues can be raised in the biological annular groove, so that the plant and aquatic organism purification process can be realized. At the same time, the waterfall annular groove is filled with filter material, and the biological annular groove is paved with a pebble layer, so the sewage filtration process is realized. The present invention combines the anaerobic hydrolysis acidification process, the biofilm process, the plant and aquatic organism purification process. The purification process and filtration process are rationally integrated and combined with multiple sewage treatment process technologies, and the synergistic effect of multiple processes is used to purify sewage, which effectively improves the sewage treatment efficiency. At the same time, the structural design of the tower body is laid out in a three-dimensional space, which effectively saves floor space. The water film formed above can be naturally oxygenated, which strengthens the contact and mass transfer between sewage and oxygen in the air, improves the sewage oxygenation efficiency, and eliminates the need for aeration equipment, saving operating costs. The device has a simple structure and is easy to operate and maintain, and can achieve fully automatic unattended operation. At the same time, it cleverly combines sewage treatment and landscape design, reflecting the harmonious unity of man and nature. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the overall structure of a multi-stage water-falling biological tower treatment device embodiment provided by the present invention;

[0018] Figure 2 A schematic structural diagram of a water distribution assembly in an embodiment of a multi-stage water drop biological tower treatment device provided by the present invention;

[0019] Figure 3 A multi-stage water drop biological tower treatment device provided by the present invention Figure 1 Enlarged schematic diagram of part A in the middle. DETAILED DESCRIPTION

[0020] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0021] like Figure 1 As shown, a multi-stage waterfall biological tower treatment device in this embodiment is used for sewage treatment, including a tower body 100, a water distribution component 200, a waterfall purification component 300, a biological annular plate 400 and an outlet pipe 500, wherein the water distribution component 200 is built in the tower body 100, the waterfall purification component 300 and the biological annular plate 400 are both connected to the outer wall of the tower body 100, the waterfall purification component 300 is located above the biological annular plate 400, and the outlet pipe 500 is connected to the biological annular plate 400.

[0022] The outer wall of the tower body 100 in this embodiment is a conical surface that is narrow at the top and wide at the bottom, and a hydrolysis acidification chamber 110 is provided inside the tower body 100 .

[0023] The tower body 100 in this embodiment is in the shape of a hollow truncated cone, and the cross-sectional area of ​​the tower body 100 is small at the top and large at the bottom. The hydrolysis and acidification chamber 110 is a conical cavity that is small at the top and large at the bottom.

[0024] It is understandable that the cross section of the tower body 100 is a frame-shaped frame, which can be a circular frame, a rectangular frame, or a polygonal frame without limitation.

[0025] Among them, the angle between the inner wall of the tower body 100 and the ground should be selected to be an appropriate value. On the one hand, the stability of the tower body 100 can be improved. Specifically, it can prevent the outer wall of the tower body 100 from being excessively tilted, resulting in excessive force on the bottom of the tower body 100. On the other hand, it is convenient for the sewage overflowing from the hydrolysis acidification chamber 110 at the top of the top tower body 100 to form a water film on the conical surface. Specifically, if the angle between the inner wall of the tower body 100 and the ground is set too large, the sewage flows downward too fast and the sewage treatment effect is poor. If the angle between the inner wall of the tower body 100 and the ground is set too small, a large area is occupied to achieve the same sewage treatment effect. Therefore, an appropriate value should be selected. The angle between the inner wall of the tower body 100 and the ground in this embodiment is 65 degrees to 72 degrees.

[0026] Biologically activated sludge is added into the tower body 100, and the sludge concentration is 5-8g / L. The main functions are to intercept suspended solids, improve the biodegradability of sewage, and reduce organic load.

[0027] The water distribution component 200 in this embodiment includes a water inlet and a water outlet. The water inlet is connected to sewage, and the water outlet is connected to the hydrolysis acidification chamber 110. The sewage to be treated is introduced into the hydrolysis acidification chamber 110 through the water distribution component 200.

[0028] The water distribution component 200 in this embodiment includes a water inlet pipe 210 and a water distributor. The water distributor is built into the bottom of the hydrolysis acidification chamber 110. One end of the water inlet pipe 210 is connected to a sewage lift pump, and the other end of the water inlet pipe 210 is connected to the water distributor.

[0029] It should be understood that the domestic activated sludge in the hydrolysis acidification chamber 110 is located at the bottom of the hydrolysis acidification chamber 110. Therefore, the water distributor is arranged at the bottom of the hydrolysis acidification chamber 110, and the sewage flowing out of the water distributor effectively contacts the domestic activated sludge.

[0030] Among them, one end of the water inlet pipe 210 is located outside the tower body 100, externally connected to a lift pump, which pumps sewage into the water inlet pipe 210 and then guides it into the water distributor.

[0031] In order to evenly distribute the sewage entering the hydrolysis acidification chamber 110, as Figure 2 shown, the water distributor in this embodiment includes a water distribution main pipe 220 and two groups of water distribution branch pipes 230. The water distribution main pipe 220 is horizontally built into the bottom of the hydrolysis acidification chamber 110. The water distribution main pipe 220 is connected to the water inlet pipe 210. The two groups of water distribution branch pipes 230 are symmetrically arranged on both sides of the water distribution main pipe 220. Each group of water distribution branch pipes 230 includes multiple water distribution branch pipes 230. The multiple water distribution branch pipes 230 in each group of water distribution branch pipes 230 are arranged in sequence along the length direction of the water distribution branch pipe 230. The water distribution branch pipe 230 is connected to the water distribution main pipe 220, and the water distribution branch pipe 230 is perpendicular to the water distribution main pipe 220.

[0032] It should be noted that through the above "abundant" - shaped water distributor, the sewage can be evenly distributed to a certain horizontal plane at the bottom of the hydrolysis acidification chamber 110.

[0033] Furthermore, the two sides of the water distribution branch pipe 230 are obliquely opened downward at 45 degrees. The sewage led out through the water distribution branch pipe 230 impacts obliquely downward on the bottom of the hydrolysis acidification chamber 110, moves upward after hitting the bottom of the tower body 100, and finally overflows from the top of the hydrolysis acidification chamber 110. During the whole process, it effectively contacts the biological activated sludge, effectively intercepts the suspended solids in the sewage, improves the biochemical property of the sewage, and reduces the organic load.

[0034] As Figure 1 and Figure 3As shown, the waterfall purification assembly 300 in this embodiment includes a plurality of waterfall annular plates 310 arranged in sequence from top to bottom, and the plurality of waterfall annular plates 310 are coaxially sleeved on the tower body 100, so that the sewage overflowing from the top of the hydrolysis acidification chamber 110 forms a water film on the conical surface and the waterfall annular plates 310, and the upper part of the waterfall annular plates 310 and the conical surface are surrounded to form a waterfall annular groove 311, and the waterfall annular groove 311 is filled with filter material 320. Specifically, the sewage overflowing from the top of the hydrolysis acidification chamber 110 flows along the conical surface under the action of gravity. The outer wall of the surface flows downward, forming a water film on the conical surface. At the same time, when the sewage flows through the drop ring plate 310, the sewage first flows into the drop ring groove 311 until it overflows from the drop ring groove 311 and flows downward along the bottom of the drop ring plate 310 to the conical surface. At the same time, the sewage forms a water film at the bottom of the drop ring plate 310. Through the formed water film, the contact and mass transfer between the sewage and the oxygen in the air are strengthened, and the sewage oxygenation efficiency is improved. At the same time, the filter material 320 placed in the drop ring groove 311 can filter and intercept suspended matter in the sewage.

[0035] The annular plate 310 of the water drop in this embodiment includes an annular inclined plate and an annular vertical plate. The annular inclined plate is arranged obliquely upward from the inside to the outside. The inner wall of the annular inclined plate is connected to the conical surface of the tower body 100, and the outer wall of the annular inclined plate is connected to the bottom of the annular vertical plate. The annular inclined plate, the annular vertical plate and the conical surface of the tower body 100 form a water drop annular groove 311.

[0036] Among them, the angle between the bottom of the annular inclined plate and the conical surface is 100-110 degrees. Through the design of the above-mentioned dimensions, the sewage in the waterfall annular groove 311 can flow along the outer wall of the annular vertical plate and the bottom of the annular inclined plate to the conical surface of the tower body 100. Of course, it is not limited to the above-mentioned settings, as long as the sewage in the waterfall annular groove 311 can overflow to the conical surface of the tower body 100.

[0037] The width of the annular drop groove 311 in this embodiment is 600-700 mm, the depth is 300-450 mm, and the vertical height difference between two adjacent annular drop grooves 311 is 700-900 mm.

[0038] The filter material 320 in this embodiment is a polyurethane sponge ball biological filler, the diameter of the polyurethane sponge ball biological filler is 5-8 mm, and the filling amount of the polyurethane sponge ball biological filler is 2 / 3 of the volume of the waterfall annular groove 311.

[0039] Specifically, because the sponge ball has a porous structure, strong water absorption, a rough outer surface and a large specific surface area, it can not only filter and intercept suspended matter in sewage, but also be very suitable as a carrier for the growth and reproduction of microorganisms, with fast biofilm formation and large biomass.

[0040] Furthermore, in the embodiment, small water-loving plants such as green radish can be planted in the annular groove 311 of the waterfall, with a planting density of 10-20 plants / square. It can be understood that during the growth of plants, nitrogen and phosphorus nutrients in the sewage are absorbed by the root system to achieve nitrogen and phosphorus removal of the sewage. The developed root system of the plant can penetrate into the sponge ball, and the sewage can be further oxygenated through the root system oxygen supply. At the same time, the sponge ball is fixed to prevent the sponge ball from being lost with the water.

[0041] The biological annular plate 400 in this embodiment is located at the bottom of the waterfall purification component 300, and the biological annular plate 400 is mounted on the tower body 100. The top of the biological annular plate 400 and the tower body 100 are surrounded by a biological annular groove 410, and a pebble layer is laid in the biological annular groove 410. The sewage passes through the cone of the tower body 100 and multiple waterfall annular plates 310 and finally flows into the biological annular groove 410. Under the action of gravity, impurities in the sewage are blocked by the pebble layer.

[0042] The bottom of the biological annular plate 400 in this embodiment is located in the same horizontal plane as the bottom of the tower body 100 , and the width of the biological annular groove 410 is 800-1000 mm and the depth is 600-800 mm.

[0043] The particle diameter of the pebbles in the pebble layer in this embodiment is 50-80 mm, and the thickness of the pebble layer is 100-150 mm.

[0044] The water inlet of the water outlet pipe 500 in this embodiment extends into the pebble layer. The water inlet of the water outlet pipe 500 is trumpet-shaped, and the purified sewage is pumped out through the filtering effect of the pebble layer.

[0045] Furthermore, ornamental fishes that feed on plant residues are stocked in the biological annular trough 410 to further purify the water quality.

[0046] Working process: under the action of the lifting pump, the water inlet pipe 210 draws the sewage into the water distribution pipe, and the sewage is evenly introduced into the bottom of the hydrolysis acidification chamber 110 through the water distribution main pipe 220 and the water distribution branch pipe 230. The sewage entering the hydrolysis acidification chamber 110 is evenly mixed and reacted with the activated sludge, and the pollutants in the water are absorbed and decomposed by the metabolism of microorganisms in the activated sludge. The reacted sewage rises with the water flow to the top of the hydrolysis acidification tower and overflows. First, the sewage flows downward along the conical surface of the tower body 100 until it flows into the drop ring groove 311 of the drop ring plate 310. As the water level in the drop ring groove 311 continues to rise, the sewage in the drop ring groove 311 overflows and flows downward along the outer wall of the drop ring plate 310 to the conical surface of the tower body 100. According to the above arrangement, the sewage flows downward and forms a thin layer on the outer wall of the drop ring plate 310 and the conical surface of the tower body 100. The thin water film, as the sewage continues to flow through, during the contact between the sewage and the air, the oxygen in the air is transferred to the surface of the water film to achieve the effect of waterfall oxygenation. At the same time, the filter material 320 in the waterfall annular plate 310 can effectively intercept the suspended matter in the sewage flowing through. At the same time, the water-loving plants planted in the waterfall annular groove 311 can absorb nutrients such as nitrogen and phosphorus in the sewage, and the roots supply oxygen to further oxygenate the sewage. Finally, the sewage that has been hydrolyzed and acidified, oxygenated by the biofilm, and purified by plants is introduced into the biological annular groove 410. Since the water inlet end of the outlet pipe 500 extends into the pebble layer, the sewage needs to pass through the pebble layer to be discharged from the outlet pipe 500, thereby realizing the filtering function. At the same time, the ornamental fish that feed on plant residues in the biological annular groove 410 can clean the impurities intercepted by the above-mentioned pebble layer, further purify the water quality, and complete the entire sewage treatment process.

[0047] Compared with the prior art: by providing a hydrolysis acidification chamber 110 in the tower body 100, an anaerobic hydrolysis acidification process can be realized, and the sewage overflowing from the top of the hydrolysis acidification chamber 110 forms a water film on the conical surface of the tower body 100 and the waterfall annular plate 310, so as to realize the biofilm process, and at the same time, water-loving plants can be planted in the waterfall annular groove 311, and ornamental fish that feed on residues can be raised in the biological annular groove 410, so as to realize the plant and aquatic biological purification process. At the same time, the waterfall annular groove 311 is filled with filter material 320, and the biological annular groove 410 is paved with a pebble layer, so as to realize the sewage filtration process. The present invention combines the anaerobic hydrolysis acidification process, The multiple sewage treatment process technologies of biofilm process, plant and aquatic biological purification process and filtration process are rationally integrated and combined, and the synergistic effect of multiple processes is used to purify sewage, which effectively improves the sewage treatment efficiency; at the same time, the structural design of the tower body 100 is arranged in a three-dimensional space, which effectively saves floor space; the water film formed above can be naturally oxygenated, strengthens the contact and mass transfer between sewage and oxygen in the air, improves the sewage oxygenation efficiency, and at the same time eliminates the need for aeration equipment, saving operating costs; the device has a simple structure and is easy to operate and maintain, and can achieve fully automatic unattended and fully automatic operation; at the same time, it cleverly combines sewage treatment and landscape design, reflecting the harmonious unity of man and nature.

[0048] In summary:

[0049] (1) The present invention rationally integrates and combines sewage treatment process technologies such as anaerobic hydrolysis acidification process, biofilm process, plant and aquatic biological purification, etc., utilizes the synergistic effect of multiple processes to purify sewage, and improves sewage treatment efficiency;

[0050] (2) The truncated cone structure is used for layout in three-dimensional space, effectively saving floor space;

[0051] (3) The multi-stage waterfall and water film are used to achieve natural oxygenation by using the gravity height difference, which strengthens the contact and mass transfer between sewage and oxygen in the air, improves the sewage oxygenation efficiency, and eliminates the need for aeration equipment, thus saving operating costs;

[0052] (4) The device has a simple structure, is easy to operate and maintain, and can achieve fully automatic unattended operation;

[0053] (5) The ingenious combination of sewage treatment and landscape design embodies the harmonious unity between man and nature.

[0054] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A multi-stage biological tower treatment device for sewage treatment, characterized in that: It includes a tower body, a water distribution component, a waterfall purification component, a biological annular plate and a water outlet pipe; The outer wall of the tower body is a conical surface that is narrow at the top and wide at the bottom, and the interior of the tower body is provided with a hydrolysis acidification chamber; The water distribution assembly includes a water inlet and a water outlet, the water inlet is externally connected to sewage, and the water outlet is connected to the hydrolysis and acidification chamber; The water distribution assembly includes a water inlet pipe and a water distributor, the water distributor is built in the bottom of the hydrolysis acidification chamber, one end of the water inlet pipe is connected to the sewage lifting pump, and the other end of the water inlet pipe is connected to the water distributor, the water distributor includes a water distribution main pipe and two water distribution branch pipe groups, the water distribution main pipe is horizontally built in the bottom of the hydrolysis acidification chamber, the water distribution main pipe is connected to the water inlet pipe, the two water distribution branch pipe groups are symmetrically arranged on both sides of the water distribution main pipe, each of the water distribution branch pipe groups includes a plurality of water distribution branch pipes, and the plurality of water distribution branch pipes in each of the water distribution branch pipe groups are sequentially arranged along the length direction of the water distribution branch pipes, the water distribution branch pipes are connected to the water distribution main pipe, the water distribution branch pipes are arranged perpendicular to the water distribution main pipe, and the two sides of the water distribution branch pipes are staggered and opened obliquely downward; The drop water purification assembly comprises a plurality of drop water annular plates arranged in sequence from top to bottom, and the plurality of drop water annular plates are coaxially sleeved on the tower body, so that the sewage overflowing from the top of the hydrolysis acidification chamber forms a water film on the conical surface and the drop water annular plates, and the upper part of the drop water annular plates and the conical surface form a drop water annular groove, and the drop water annular groove is filled with filter material; The biological annular plate is located at the bottom of the waterfall purification component, the biological annular plate is sleeved on the tower body, the top of the biological annular plate and the tower body are surrounded to form a biological annular groove, and a pebble layer is laid in the biological annular groove; The water inlet of the water outlet pipe extends into the pebble layer; The water drop annular plate comprises an annular inclined plate and an annular vertical plate, the annular inclined plate is arranged obliquely upward from the inside to the outside, the inner wall of the annular inclined plate is connected to the conical surface of the tower body, the outer wall of the annular inclined plate is connected to the bottom of the annular vertical plate, and the annular inclined plate, the annular vertical plate and the conical surface of the tower body form the water drop annular groove; The included angle between the bottom of the annular inclined plate and the conical surface is 100-110 degrees, which facilitates the sewage in the waterfall annular groove to flow along the outer wall of the annular vertical plate and the bottom of the annular inclined plate to the conical surface of the tower body.

2. The multi-stage water-falling biological tower treatment device according to claim 1 is characterized in that: The tower body is in the shape of a hollow truncated cone, the cross-sectional area of ​​the tower body is small at the top and large at the bottom, the hydrolysis and acidification chamber is a conical cavity which is small at the top and large at the bottom, and biologically activated sludge is added into the tower body.

3. The multi-stage water-falling biological tower treatment device according to claim 1 is characterized in that: The vertical height difference between two adjacent drop ring grooves is 700-900 mm.

4. The multi-stage water-falling biological tower treatment device according to claim 1 is characterized in that: The filter material is polyurethane sponge ball biological filler, and the filling amount of the polyurethane sponge ball biological filler is 2 / 3 of the volume of the waterfall annular groove.

5. The multi-stage water-fall biological tower treatment device according to claim 1, characterized in that: The bottom of the biological annular plate and the bottom of the tower body are located in the same horizontal plane.

6. The multi-stage water-fall biological tower treatment device according to claim 1, characterized in that: The water inlet of the water outlet pipe is trumpet-shaped.

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