Movable biological membrane sewage treater

Abstract

The utility model discloses a movable biological membrane sewage treater and a method, the movable biological membrane sewage treater comprises a reactor body, the reactor body is provided with a sewage inlet and a sewage outlet, a combined suspension filler is placed in the reactor body, and a rotating shaft extending left and right is arranged in the reactor body. A plurality of groups of stirring blades are arranged on the rotating shaft at intervals from left to right, each group of stirring blades consists of 2-8 mechanical net blades, the mechanical net blades are of a gourd ladle-shaped structure, the 2-8 mechanical net blades are mounted on the same circumference, and the directions of gourd ladle openings of the mechanical net blades are consistent with the rotating direction of the rotating shaft; a plurality of filtering holes capable of filtering water are formed in the mechanical net blade, and the diameter of the filtering holes is smaller than the diameter of the filler. The system is high in organic pollutant removal efficiency, good in denitrification effect, low in cost, stable in operation, low in operation cost and simple and convenient to operate and control.

Description

TECHNICAL FIELD

[0001] The utility model relates to a movable biological membrane sewage treater and belongs to the technical field of sewage treatment. BACKGROUND

[0002] The contact oxidation method is a new biochemical treatment method for waste water with the characteristics of activated sludge method and biological membrane method. The main equipment of the method is a biological contact oxidation filter tank. In the aeration tank which is not permeable to air, fillers such as coke, gravel, plastic honeycomb and plastic combined fiber are installed, the fillers are submerged in water, air is blown at the bottom of the fillers by a blower to charge oxygen, this method is called air-blowing aeration, air can be carried upwards with the waste water to be treated, and freely passes through the filter material to reach the water surface, after the air escapes, the waste water returns to the bottom of the tank from the upper part of the filter material. The activated sludge is attached to the surface of the fillers and does not flow with the water, the biological membrane is directly subjected to the strong agitation of the rising air flow and is constantly renewed, thereby improving the purification effect.

[0003] At present, the fillers are fixed in the tank body by a filler frame, the biological membrane can only fall off by itself, the residual sludge is not easy to be discharged, and is easy to cause water quality deterioration and affect the treatment effect by being retained between the filter materials. In addition, the fillers are easy to collapse, the fillers are easy to be blocked, and the short flow phenomenon occurs, the fillers need to be removed and fixed after the water is discharged, the aeration disc is easy to be damaged, the fillers need to be removed and fixed after the water is discharged, and the aeration disc needs to be replaced. In addition, the blower needs to be maintained, the pipeline and the valve also need to be maintained, the operation is complex, the operation and maintenance cost is high, and the equipment investment is high. CONTENT OF THE UTILITY MODEL

[0004] In view of the above problems, the utility model aims at providing a movable biological membrane sewage treater, which has high removal efficiency of organic pollutants, good denitrification effect, low cost, stable system operation, low operation cost, simple and convenient operation and control.

[0005] In order to achieve the above purpose, the technical scheme of the utility model is as follows: a movable biological membrane sewage treater, which comprises a reactor body, a sewage inlet and a sewage outlet are arranged on the reactor body, characterized in that: a combined suspended ball filler is placed in the reactor body, a rotating shaft extending leftward and rightward is arranged in the reactor body, a plurality of groups of stirring blades are arranged on the rotating shaft from left to right at intervals, each group of stirring blades is composed of 2-8 mechanical net leaves, the mechanical net leaves are in a cup-shaped structure, the 2-8 mechanical net leaves are installed on the same circumference, the direction of the cup opening of the mechanical net leaves is consistent with the rotating direction of the rotating shaft, and a plurality of filter holes with a filter hole diameter smaller than the diameter of the filler are arranged on the mechanical net leaves.

[0006] The introduced sewage is subjected to biological adsorption, biological aerobic treatment and biological anoxic denitrification treatment in the movable biological membrane sewage treater, and the sludge-water mixture after the biological oxidation and anoxic denitrification treatment is discharged from the sewage discharge outlet to the next process.

[0007] The mechanical net-leaf rotation can supplement the dissolved oxygen in the sewage in the biological reactor. With the rotation of the leaf, part of the combined suspended ball filler is retained in the ladle-shaped leaf and leaves the water surface. On the one hand, the sewage in the combined suspended ball filler flows down in the leaf that rotates away from the water surface, forming a waterfall aeration. On the other hand, after the combined suspended ball filler leaves the water surface, the microorganisms attached to the filler obtain sufficient oxygen in the air. In addition, with the rotation, the filler slides from the leaf into the sewage, causing splashes that also play a role in reoxygenating the sewage in the biological reactor.

[0008] In addition, the mechanical net-leaf rotation can also promote the movement of the combined suspended ball filler in the biological reactor. The low-speed rotation of the mechanical net-leaf pushes the combined suspended ball filler to move in the biological reactor, increasing the contact between the microorganisms attached to the combined suspended ball filler and the pollutants in the sewage.

[0009] Due to the large specific surface area of the combined suspended ball filler, a large number of biological bacteria can be attached. In the process of metabolism, the biological bacteria consume the organic pollutants, nitrogen, phosphorus nutrients and dissolved oxygen brought in by the sewage, can simultaneously carry out organic carbonization, nitrification and denitrification, thereby effectively removing the pollutants in the sewage and improving the removal efficiency of the pollutants.

[0010] The microorganisms grow on the surface of the filler. With the thickening of the microorganism attachment layer, the microorganism membrane forms anoxic layer (even anaerobic layer) and aerobic layer from inside to outside, can simultaneously carry out anoxic denitrification biological reaction and aerobic biological reaction, achieving a better effect of removing pollutants.

[0011] The combined suspended ball filler added in the biological reactor continuously moves in the reactor under the stirring action of the mechanical net-leaf rotation, the biological membrane attached to the surface of the filler is continuously shed and renewed in the collision, maintaining the activity of the biological membrane and improving the biological treatment effect.

[0012] The stirring blade and the rotating shaft can be made of stainless steel, carbon steel (subjected to corrosion treatment), alloy or non-metallic material.

[0013] In the above scheme, the sewage inlet and the sewage outlet are respectively located on the left and right sides of the reactor body. Located at the upper end, a water passing hole is arranged on the vertical partition plate at the bottom of the other side of the sewage inlet and outlet, increasing the flow path of the sewage in the biological reactor.

[0014] In the above scheme, the two ends of the rotating shaft are respectively installed on the left and right side walls of the reactor body through bearings, and one end extends out of the reactor body and is connected with the motor with a speed reducer. The motor is a variable frequency motor, and a frequency converter is arranged to flexibly adjust the rotating speed according to the actual working condition.

[0015] In the above scheme: the reactor body is provided with front and rear extending vertical partition, the vertical partition is provided with water passing hole at the bottom of the other side of water inlet and outlet, the water passing hole and the sewage outlet are provided with filter screen. The filter screen aperture is smaller than the filler diameter. The filter screen aperture is 10-50mm, which is used for intercepting and avoiding the filler flowing out.

[0016] In the above scheme: the sewage inlet, water passing hole and sewage outlet are staggered in front and back and up and down.

[0017] In the above scheme: the filter hole aperture of the mechanical net blade is 10-30mm, the hole spacing is 30-50mm, the combined suspension ball filler diameter is 80-150mm, and the specific surface area of the combined suspension ball filler is greater than 800m 2 / m 3 .

[0018] In the above scheme: the reactor body is provided with on-line dissolved oxygen meter, the on-line dissolved oxygen meter is connected with control system, and the dissolved oxygen in the biological reactor is monitored and controlled on-line.

[0019] In the above scheme: each group of stirring blades is composed of 3-4 mechanical net blades.

[0020] The sewage enters the movable biofilm sewage treatment device from the sewage inlet, the mechanical net blade is partially immersed in the sewage, the stirring speed is controlled to be 0.2-20r / min low speed rotation, oxygen is continuously supplied to the reactor body, the sewage is fully contacted with the filler for reaction, and then is discharged from the sewage outlet. The maximum immersion depth of the mechanical net blade can reach two-thirds to four-fifths of the length of the mechanical net blade.

[0021] In order to realize modular design and operation, the biological reactor can be connected in series, connected in parallel or connected in series and parallel combination according to the needs of sewage treatment process, so that different sewage quantity, different water quality and other working conditions can be adapted, and better pollutant removal effect can be achieved.

[0022] Compared with the prior art, the beneficial effects of the utility model are:

[0023] The utility model discloses a process of adsorption of microorganism to pollutant, biological aerobic treatment, biological anoxic nitrogen removal treatment is realized in the same bioreactor, and the alternate contact of the microorganism adhered to the surface of the combined suspension ball filler in sewage and air is realized through the slow rotation of mechanical net leaf, and the purpose of the reoxygenation of sewage such as the falling of combined suspension ball filler, sewage exposure is realized, and the microorganism adhered to the surface of combined suspension ball filler absorbs the organic matter in water when being immersed, and absorbs the oxygen in the atmosphere when being exposed in the air, and the process of " oxygen-rich - anoxic " is alternated constantly, and it is favorable to the oxidation decomposition of the adsorbed organic matter and the biological denitrification treatment of sewage, thereby achieving the purpose of purifying water quality. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is the top view of the utility model.

[0025] Figure 2 For Figure 1 It is the A-A section view of the utility model. DETAILED DESCRIPTION

[0026] The utility model is further described below through examples and combining with the drawings:

[0027] As Figure 1 And 2 Shown, a kind of movable biofilm sewage treatment device, including reactor body 1, reactor body is provided with sewage inlet 2 and sewage outlet 3, and sewage inlet and sewage outlet are respectively located on the left side and right side upper end of reactor body, and combined suspension filler 10 is placed in reactor body, and the diameter of combined suspension ball filler is 80-150mm, and the specific surface area of combined suspension ball filler is greater than 800m 2 / m 3 .

[0028] The reactor body 1 is provided with a left and right extending rotating shaft 5, the two ends of the rotating shaft 5 are respectively installed on the left and right side walls of the reactor body through bearings, and one end thereof extends out of the reactor body and is connected with a motor 6 with a speed reducer. The motor is selected as a variable frequency speed regulation motor.

[0029] A plurality of groups of stirring blades are arranged on the rotating shaft 5 from left to right, and according to the length of the reactor body 1, 2-8 groups of stirring blades can be arranged. Each group of stirring blades is composed of 2-8 mechanical net leaves 4, preferably 3-4 mechanical net leaves 4. The mechanical net leaf 4 has a ladle-shaped structure, and the 2-8 mechanical net leaves 4 are installed on the same circumference, and the direction of the ladle opening of the mechanical net leaf 4 is consistent with the rotating direction of the rotating shaft, as shown in the figure, so as to facilitate the retention of the filler in the mechanical net leaf. A plurality of filter holes with a diameter smaller than that of the filler are arranged on the mechanical net leaf 4. The filter hole diameter of the mechanical net leaf is 10-30 mm, and the hole spacing is 30-50 mm. Figure 2

[0030] A front and rear extending vertical partition plate 7 can be arranged in the reactor body, and the rotating shaft 5 is located above the vertical partition plate 7 and can be fixed through the support arranged on the vertical partition plate 7. The water passing hole 8 is arranged on the vertical partition plate 7, and the water passing hole 8 is located at the bottom on the other side of the sewage inlet and outlet. A filter screen is arranged on the water passing hole 8 and the sewage outlet. The sewage inlet, the water passing hole and the sewage outlet are arranged staggered in front and back and up and down. That is, as shown in the figure, when there is only one vertical partition plate 7, the sewage inlet is arranged at the upper end of the front side, the sewage outlet is arranged at the upper end of the front side, and the water passing hole is arranged at the lower end of the rear side. In this way, the flow path of the sewage in the biological reactor is increased.

[0031] An on-line dissolved oxygen meter 9 is arranged in the reactor body.

[0032] In use, the sewage enters the movable biological membrane sewage treatment device from the sewage inlet, and the mechanical net leaf is partially immersed in the sewage. The maximum immersion depth of the mechanical net leaf can reach two-thirds to four-fifths of the length of the mechanical net leaf. The stirring speed is controlled to be 0.2-20 revolutions per minute, and oxygen is continuously supplied to the reactor body. After the sewage and the filler are fully contacted and reacted, the sewage is discharged from the sewage outlet.

[0033] ​The introduced sewage is subjected to biological adsorption, biological aerobic treatment and biological anoxic nitrogen removal treatment in the mobile biofilm sewage treatment device, and the sludge-water mixture after the biological oxidation and anoxic nitrogen removal treatment is discharged from the sewage outlet into the next process. The rotation of the mechanical net blade can supplement the dissolved oxygen of the sewage in the biological reactor. With the rotation of the blade, part of the combined suspended ball filler is retained in the leaf-shaped blade and leaves the water surface. On the one hand, the sewage in the combined suspended ball filler flows down in the rotating blade that leaves the water surface, forming a waterfall aeration. On the other hand, after the combined suspended ball filler leaves the water surface, the microorganisms attached to the filler obtain sufficient oxygen in the air. In addition, with the rotation, the filler slides from the blade into the sewage, causing splashing water that also plays a role in reoxygenating the sewage in the biological reactor. At the same time, the rotation of the mechanical net blade also promotes the movement of the combined suspended ball filler in the biological reactor. The low-speed rotation of the mechanical net blade promotes the movement of the combined suspended ball filler in the biological reactor, increasing the contact between the microorganisms attached to the combined suspended ball filler and the pollutants in the sewage.

[0034] Due to the large specific surface area of the combined suspended ball filler, a large number of biological bacteria can be attached. In the process of metabolism, the biological bacteria consume the organic pollutants, nitrogen and phosphorus nutrients and dissolved oxygen brought by the sewage inlet, can simultaneously perform organic oxidation, nitrification and denitrification, thereby effectively removing the pollutants in the sewage and improving the removal efficiency of the pollutants. The microorganisms grow on the surface of the filler. With the thickening of the microorganism attachment layer, the microorganism membrane forms an anoxic layer (even an anaerobic layer) and an aerobic layer from inside to outside, can simultaneously perform anoxic denitrification biological reaction and aerobic biological reaction, and achieves a better effect of removing pollutants.

[0035] The combined suspended ball filler added in the biological reactor moves continuously in the reactor under the stirring action of the mechanical net blade. The biological membrane attached to the surface of the filler is continuously shed and renewed in the collision, maintains the activity of the biological membrane and improves the biological treatment effect.

[0036] Compared with the traditional biological membrane-attached filler contact oxidation, the water quality of the water inlet and outlet of the mobile biofilm sewage treatment device is shown in Table 1.

[0037] Table 1: Life sewage treatment table

[0038]

[0039] It can be seen that, compared with the traditional contact oxidation method, the mobile biofilm sewage treatment device only has a reaction tank, a combined suspended ball filler and a mechanical net blade, while the traditional system is composed of a reaction tank, a biological filler, a filler support, an aeration disc, a pipeline, a valve, a fan and a fan room, a flow meter, a pressure gauge and the like, and the system is simpler in composition.

[0040] The system only needs to maintain the mechanical net leaf, and the existing contact oxidation needs to maintain the fixed filler to avoid filler collapse, blockage, short flow, and removal, and needs to maintain the aerator, fan, pipeline, valve and the like.

[0041] The maintenance cost is low.

[0042] The process control only needs to control the rotating speed of the mechanical net leaf, and the traditional one needs to control the start and stop of the fan, air flow, pressure, valve switch, sewage dissolved oxygen and the like.

[0043] The system has lower operation cost, smaller land occupation, simpler system composition, simpler operation and maintenance, better treatment effect and effluent water quality, and meets the requirements of the national sewage discharge standard.

[0044] The utility model is not limited to the above-mentioned embodiments, and those skilled in the art can understand that: without departing from the principles and purposes of the utility model, various changes, modifications, replacements and modifications can be made to these embodiments, and the scope of the utility model is defined by the claims and equivalents thereof.

Claims

1. A moving biofilm wastewater treatment apparatus comprising a reactor body having a wastewater inlet and a wastewater outlet provided thereon, characterised in that: The reactor body is provided with combined suspension ball fillers, and a rotating shaft extending left and right is arranged in the reactor body, and a plurality of groups of stirring blades are arranged on the rotating shaft from left to right, each group of stirring blades is composed of 2-8 mechanical net leaves, the mechanical net leaves are in a ladle-shaped structure, the 2-8 mechanical net leaves are installed on the same circle, the direction of the ladle opening of the mechanical net leaves is consistent with the rotating direction of the rotating shaft, and a plurality of filter holes with a filter hole diameter smaller than the filler diameter are arranged on the mechanical net leaves.

2. The living biofilm wastewater treatment system of claim 1, wherein: The sewage inlet and the sewage outlet are respectively arranged on the left and right sides of the reactor body.

3. A moving bed biofilm reactor according to claim 1 or 2, characterised in that: The two ends of the rotating shaft are respectively installed on the left and right side walls of the reactor body through bearings, and one end extends out of the reactor body and is connected with a motor with a speed reducer.

4. The living biofilm wastewater treatment system of claim 3, wherein: The reactor body is provided with a vertical partition plate extending front and back, the vertical partition plate is provided with a water passing hole at the bottom on the other side of the water inlet and outlet, and a filter screen is arranged on the water passing hole and the sewage outlet.

5. The living biofilm wastewater treatment system of claim 4, wherein: The sewage inlet, the water passing hole and the sewage outlet are staggered front and back and up and down.

6. The living biofilm wastewater treatment system of claim 5, wherein: The filter hole aperture of the mechanical net leaf is 10-30mm, the hole spacing is 30-50mm, the combined suspension ball filler diameter is 80-150mm, and the specific surface area of the combined suspension ball filler is greater than 800m 2 / m 3 .

7. The living biofilm wastewater treatment system of claim 1 wherein: The reactor body is provided with an on-line dissolved oxygen meter.

8. The living biofilm wastewater treatment system of claim 1 wherein: Each group of stirring blades is composed of 3-4 mechanical net leaves.

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