Multi-gallery variable-tank-capacity microalgae photobioreactor

Abstract

The utility model discloses a multi-gallery variable-tank-capacity microalgae photobioreactor which comprises a reaction tank, a first partition wall and a third partition wall are sequentially arranged in the reaction tank in the flow direction, the first partition wall and the third partition wall divide the reaction tank into a first-stage tank, a second-stage tank and a third-stage tank, a second partition wall located between the first partition wall and the third partition wall is arranged in the reaction tank, and the first-stage tank, the second-stage tank and the third-stage tank are sequentially arranged in the reaction tank. The second partition wall divides the second-stage tank into at least two second-stage sub-tanks, the second partition wall is of a telescopic structure, and the first partition wall and / or the third partition wall are / is horizontally and movably arranged in the reaction tank. The reactor has the beneficial effects that the reactor is simple in structure and low in manufacturing and using cost, the tank volume can be adjusted according to the sewage inflow, and it is ensured that the reactor is in an efficient operation interval; in the growth process of algae in the pond, nitrogen, phosphorus and other substances in sewage can be effectively utilized, and the content of nitrogen, phosphorus and other pollutants in the sewage is effectively reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of sewage treatment, and particularly relates to a multi-corridor variable-pool-capacity microalgae photobioreactor which can be applied to rural sewage treatment. BACKGROUND

[0002] The rural sewage treatment method is mainly biological treatment and ecological treatment. The biological method mainly adopts an integrated device based on the principle of activated sludge to centrally treat sewage, and has the advantages of low treatment cost and mature method, and is the mainstream centralized sewage treatment method of the current established towns. The ecological treatment mainly adopts stable pond and artificial wetland to treat sewage, and has the characteristics of ecological environmental protection and low investment, and is generally used for scattered households or areas that do not have unified collection and treatment of sewage.

[0003] The microalgae sewage treatment method is a new sewage treatment method, which mainly consumes the pollution components in sewage through the respiration and photosynthesis of microalgae, plays a role in purifying water quality, can effectively remove nitrogen, phosphorus, organic matter and other pollutants in wastewater, promote the recycling of nutrients such as nitrogen and phosphorus, and realize carbon sequestration. Compared with the activated sludge treatment method, it has the advantages of low investment and high resource utilization rate; compared with the traditional ecological treatment method, it has the advantages of good treatment effect and small land occupation.

[0004] At present, the research on the microalgae reactor is a hot spot and a difficulty. The existing research on the microalgae reactor mainly focuses on the fixed volume reactor, however, the influent of the sewage treatment system is easily affected by multiple factors such as rainfall and water use period, and the fixed volume microalgae reactor will be limited in actual application, thereby affecting the performance of the whole treatment system. CONTENT OF THE INVENTION

[0005] The application aims to provide a multi-corridor variable-pool-capacity microalgae photobioreactor, which solves the problem of the microalgae sewage treatment pool that the treatment effect is reduced due to the mismatch between the pool volume and the influent volume. The reactor is an open photobioreactor, which has the characteristics of simple structure, low cost and simple operation, and has the characteristics of multi-corridor variable-pool-capacity, which can effectively treat sewage and realize resource utilization.

[0006] The application achieves the above-mentioned purpose through the following technical solutions.

[0007] The application discloses a multi-corridor variable pool capacity microalgae photobioreactor, which comprises a reaction pool, wherein a first partition wall and a third partition wall are arranged in the reaction pool in sequence along a flow direction, the first partition wall and the third partition wall divide the reaction pool into a first-stage pool, a second-stage pool and a third-stage pool, a second partition wall is arranged in the reaction pool and located between the first partition wall and the third partition wall, the second partition wall divides the second-stage pool into at least two second-stage sub-pools, the second partition wall is of an extendable structure, and the first partition wall and / or the third partition wall is horizontally movably arranged in the reaction pool.

[0008] Further, the reaction pool is provided with a water inlet pipe communicating with the first-stage pool, a cushion layer is arranged in the first-stage pool, the first partition wall is provided with a water distribution pipe communicating with the first-stage pool and the second-stage sub-pool, microalgae organisms are arranged in the second-stage pool, a filter layer is arranged in the third-stage pool, the reaction pool is provided with a water outlet pipe communicating with the third-stage pool, and the reaction pool is covered with a light-transmitting cover plate.

[0009] Further, the second partition wall equally divides the second-stage pool into three second-stage sub-pools, the first partition wall is fixed in the reaction pool, and the third partition wall is horizontally movably arranged in the reaction pool.

[0010] Further, the reaction pool comprises a base plate at the bottom and a surrounding wall around the periphery, the base plate is of a reinforced concrete structure, and the surrounding wall is of a masonry structure.

[0011] Further, the water inlet pipe is of a variable diameter and made of PE material, the water distribution pipe and the water outlet pipe are made of PE material, and the water distribution pipe and the water outlet pipe are provided with filter screens at inlets.

[0012] Further, the first partition wall is of a masonry structure, the second partition wall is of a stainless steel structure, and the third partition wall is of a prefabricated reinforced concrete structure.

[0013] Further, the cushion layer comprises a lower soil filling layer and an upper impermeable concrete layer, an aeration disc is arranged in the second-stage sub-pool, and the filter layer is a biochar layer.

[0014] Further, an insect-proof net is arranged between the reaction pool and the light-transmitting cover plate.

[0015] Further, the light-transmitting cover plate is made of tempered glass material, and the insect-proof net is made of nylon wire material.

[0016] Further, a root-puncture-resistant waterproof coating is brushed on sewage contact surfaces of the reaction pool, the first partition wall, the second partition wall and the third partition wall.

[0017] The application has the following beneficial effects:

[0018] 1. The reactor has simple structure, low manufacturing and using cost, can adjust pool capacity according to sewage inflow, and can ensure that the reactor is in a high-efficiency operation range.

[0019] 2. In the growth process of algae species in the pool, nitrogen, phosphorus and other substances in the sewage can be effectively utilized, and the content of nitrogen, phosphorus and other pollutants in the sewage can be effectively reduced.

[0020] 3. Microalgae can effectively fix carbon dioxide in the atmosphere under light conditions.

[0021] 4. After the growth and reproduction of microalgae, microalgae fertilizer and high-quality protein feed can be made, and resource utilization can be realized.

[0022] The foregoing main scheme of the present application and each further selected scheme thereof can be freely combined to form multiple schemes, all of which are the schemes that can be adopted and claimed by the present application; and the present application can also be freely combined between (each non-conflicting selection) selections and between other selections. Those skilled in the art can understand that there are many combinations according to the prior art and common knowledge after understanding the present scheme, all of which are the technical schemes claimed by the present application, and are not listed here. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a structural top view of the present application.

[0024] Figure 2 is an A-A sectional view of Figure 1 .

[0025] In the figure: 1 - reaction pool, 2 - water inlet pipe, 3 - first partition wall, 4 - cushion layer, 5 - water distribution pipe, 6 - second partition wall, 7 - third partition wall, 8 - filter layer, 9 - water outlet pipe, 10 - light-transmitting cover plate, 11 - base plate, 12 - enclosing wall, 13 - filter screen, 14 - soil layer, 15 - impermeable concrete layer, 16 - insect screen. DETAILED DESCRIPTION

[0026] The present application will be further described below in combination with specific embodiments and drawings.

[0027] Referring to Figure 1 and Figure 2 , a multi-corridor variable pool capacity microalgae photobioreactor includes a reaction pool 1 (including a base plate 11 and an enclosing wall 12), a water inlet pipe 2, a first partition wall 3, a cushion layer 4 (including a soil layer 14 and an impermeable concrete layer 15), a water distribution pipe 5, a second partition wall 6, a third partition wall 7, a filter layer 8, a water outlet pipe 9, a light-transmitting cover plate 10, a filter screen 13 and an insect screen 16.

[0028] The first partition wall 3 and the third partition wall 7 are arranged in the reaction pool 1 in sequence along the flow direction, the first partition wall 3 and the third partition wall 7 divide the reaction pool 1 into a first-stage pool, a second-stage pool and a third-stage pool, the second partition wall 6 is arranged in the reaction pool 1 between the first partition wall 3 and the third partition wall 7, the second partition wall 6 divides the second-stage pool into at least two second-stage sub-pools, the second partition wall 6 is of an extendable structure, and the first partition wall 3 and / or the third partition wall 7 is horizontally movably arranged in the reaction pool 1.

[0029] The telescopic end of the second partition wall 6 is fixed on the first partition wall 3 and / or the third partition wall 7, and when the first partition wall 3 and / or the third partition wall 7 moves horizontally, the second partition wall 6 is driven to move synchronously, so as to change the volume of the reaction tank 1 and ensure that the reactor is in the high-efficiency operation range.

[0030] The reaction tank 1 is provided with a water inlet pipe 2 connected to the primary tank, so as to realize the entry of sewage into the primary tank. The primary tank is mainly used for water distribution and diversion. A cushion layer 4 is arranged in the primary tank, so as to reduce the water storage in the primary tank. The first partition wall 3 is provided with water distribution pipes 5 connected to the secondary tanks, and the water distribution pipes 5 are arranged one-to-one with the secondary tanks and are kept at the same height, so as to realize the uniform distribution of sewage to the secondary tanks. Microalgae organisms are arranged in the secondary tanks, and the microalgae organisms are used for biological treatment of sewage.

[0031] The secondary tanks and the tertiary tank are not connected by a pipeline, and when the sewage is higher than the third partition wall 7, the sewage can directly flow into the tertiary tank. A filter layer 8 is arranged in the tertiary tank, and the reaction tank 1 is provided with a water outlet pipe 9 connected to the tertiary tank, so as to discharge the filtered sewage. The reaction tank 1 is covered with a light-transmitting cover plate 10, so as to cover and protect the reaction tank 1, avoid the influence of the external environment on the sewage treatment, and at the same time, the cover plate can transmit light to meet the light requirement of the microalgae photosynthesis.

[0032] The second partition wall 6 is preferably arranged on two sides, and the two second partition walls 6 divide the secondary tank into three secondary tanks. Since the cushion layer 4 is a rigid structure and the filter layer 8 is a flexible bulk material structure, the first partition wall 3 is preferably fixed in the reaction tank 1, and the third partition wall 7 is horizontally movable and arranged in the reaction tank 1.

[0033] The reaction tank 1 is a rectangular structure, and the structure size is 2.8m x 2.4m in length and width and 1m in height. The reaction tank 1 includes a base plate 11 at the bottom and a surrounding wall 12 around the periphery. The base plate 11 is a reinforced concrete structure (thickness 200mm), and the surrounding wall 12 is a masonry structure (thickness 200mm). A water inlet is reserved 100mm away from the top surface of the surrounding wall 12, and a water inlet pipe 2 is installed. The water inlet pipe 2 is made of PE material and has a variable diameter ranging from 20mm to 50mm.

[0034] The first partition wall 3 is a masonry structure (thickness 100mm) perpendicular to the flow direction. Three circular holes (diameter 50mm) are reserved 600mm away from the bottom of the first partition wall 3, and water distribution pipes 5 (diameter 50mm) are installed. The water distribution pipes 5 are made of PE material, and the inlets of the water distribution pipes 5 are provided with filter screens 13 to filter impurities and garbage.

[0035] The second partition wall 6 is a stainless steel telescopic structure parallel to the flow direction, with a length of 1000 mm, a thickness of 100 mm, and a height of 500 mm, and a telescopic range of 600 mm-1000 mm. The specific telescopic form of the second partition wall 6 can adopt a stacked wall form, including a fixed stacked wall and a movable stacked wall arranged vertically, the fixed stacked wall and the movable stacked wall are stacked together and have a part overlapping each other, the movable stacked wall moves horizontally relative to the base plate 11 and the fixed stacked wall, and waterproof sealing treatment is made between the movable stacked wall and the fixed stacked wall and between the movable stacked wall and the base plate during horizontal movement of the movable stacked wall.

[0036] The third partition wall 7 is a prefabricated reinforced concrete structure (thickness 100 mm) perpendicular to the flow direction, and the internal reinforcement can use a steel mesh sheet. The third partition wall 7 moves horizontally along the flow direction relative to the base plate 11, and synchronously telescopes along the flow direction with the second partition wall 6 to control the size of the internal pool volume of the reaction pool. At the same time, waterproof sealing treatment is needed between the third partition wall 7 and the base plate 11 during horizontal movement of the third partition wall 7.

[0037] The bottom of the surrounding wall 12 is reserved for a water outlet, and the water outlet is provided with a water outlet pipe 9 (diameter DN32) made of PE material. The inlet of the water outlet pipe 9 is provided with a filter screen 13 to prevent the filter material in the three-stage pool from flowing out.

[0038] The cushion layer 4 includes a lower fill layer 14 and an upper impermeable concrete layer 15. The fill layer has a height of 400 mm from the top surface of the foundation, and the top surface of the backfill is 100 mm thick P6 impermeable C20 concrete. The fill layer fills and raises the internal part of the first-stage pool to avoid excessive water storage in the first-stage pool and quickly achieve the water distribution and diversion function.

[0039] An aeration disc is arranged in the second-stage sub-pool to increase the oxygen content in the second-stage pool and optimize the reaction effect in the second-stage pool. The filter layer 8 is a biochar layer that filters the discharged water to improve the purification effect. The sewage contact surfaces of the reaction pool 1, the first partition wall 3, the second partition wall 6, and the third partition wall 7 are coated with a (SBS modified) root-penetrating-resistant waterproof coating for waterproof treatment of the internal part of the reaction pool 1 to avoid water leakage and seepage.

[0040] The light-transmitting cover plate 10 is made of tempered glass, which meets the light transmission requirement and has reliable strength. The distance between the light-transmitting cover plate 10 and the top surface of the surrounding wall 12 is 50 mm, and the 50 mm between the reaction pool 1 and the light-transmitting cover plate 10 is provided with an insect screen 16 made of nylon wire to prevent mosquitoes and insects from entering the internal part of the reaction pool 1.

[0041] The construction process of the present application is as follows:

[0042] 1. Select an appropriate site with a size of 3.2m x 2.8m, set the reaction pool base elevation according to the sewage drainage ditch elevation, and excavate the earthwork according to the elevation. After the excavation is completed, the site is leveled.

[0043] 2. Pouring the base pad of the reaction pool, the base pad is poured with C15 fine stone concrete, and the thickness is 50 mm.

[0044] 3. The base plate of the reaction pool is a reinforced concrete structure, the size is 2.8 m x 2.4 m, and the thickness is 200 mm, the structure adopts HRB400 steel bars with a diameter of 12 mm, the steel bars are arranged in double layers and two directions with a spacing of 200 mm.

[0045] 4. After the steel binding is completed, the side formwork of the base plate structure of the reaction pool is installed, the side formwork is installed and reinforced with shaped steel formwork. After the installation of the formwork is completed, the concrete is poured, the concrete is poured with P6 anti-permeable C30 concrete, when the concrete reaches a certain strength and meets the conditions for removing the formwork, the side formwork is removed, and timely maintenance is performed.

[0046] 5. The surrounding wall is built with shale solid bricks, the outline of the surrounding wall is the outline of the base plate, and the thickness of the surrounding wall is 200 mm. The water inlet is reserved at a position 100 mm away from the top surface of the surrounding wall 12 at one end of the surrounding wall 12, and the water inlet pipe 2 is installed, the water inlet pipe 2 is made of PE material with variable diameter, and the variable diameter range is 20 mm to 50 mm. The water outlet is reserved at the bottom of the other end of the surrounding wall 12, and the water outlet pipe 9 (with a diameter of DN32) is installed, and the inlet of the water outlet pipe 9 is arranged with a filter screen 13.

[0047] 6. The first partition wall is built with shale solid bricks, the thickness of the first partition wall is 100 mm, three circular holes (with a diameter of 50 mm) are reserved at a position 600 mm away from the bottom, and a PE pipe (with a diameter of 50 mm) is installed as a water distribution pipe, the positions of the PE pipe on the first partition wall are: 600 mm, 1200 mm, and 1800 mm away from the end of the wall body respectively. A stainless steel filter screen is installed at the inlet end of the PE pipe to prevent solid impurities from entering the pool.

[0048] 7. The second partition wall is installed, the fixed end of the second partition wall is fixedly connected with the first partition wall, and the gap between the second partition wall and the base plate is waterproofed. The thickness of the second partition wall is 100 mm, the height is 500 mm, and the second partition walls are evenly spaced.

[0049] 8. The third partition wall is a prefabricated monolithic concrete member, the thickness is 100 mm, the height is the same as that of the second partition wall, and the third partition wall is installed and connected at the expansion end of the second partition wall and can move along the direction of the second partition wall to control the sizes of the three secondary pools of the reaction pool.

[0050] 9. A light-transmitting tempered glass cover plate is installed at the top of the reaction pool, the distance between the glass cover plate and the top surface of the surrounding wall is 50 mm, the glass cover plate is supported by wood blocks with a size of 50 mm x 50 mm x 50 mm, and the spacing between the wood blocks is 500 mm. A nylon wire insect screen is installed in the gap between the glass cover plate and the top surface of the surrounding wall, the inner diameter of the screen holes is 0.6 mm, to prevent mosquitoes and insects from entering the reaction pool.

[0051] 10. Fill the earth in the primary pool, the filling height is 400mm from the top surface of the foundation, and compact and level, pour 100mm thick P6 impermeable C20 concrete on the backfill top surface.

[0052] 11. The sewage contact surface of the bottom and internal partition wall in the reaction pool is coated with SBS modified root-penetrating resistant waterproof paint.

[0053] 12. Install aeration discs at the bottom of the three secondary sub-pools, and put microalgae seeds in the three secondary sub-pools.

[0054] 13. Place biochar as a filter layer in the tertiary pool.

[0055] The workflow of the present application: sewage flows into the primary pool from the water inlet, when the sewage in the primary pool reaches a certain height, it flows from three water distribution pipes to three secondary sub-pools. When the sewage in the three secondary sub-pools accumulates to 200mm high, start the aeration disc and put in the microalgae seeds. Put biochar in the tertiary pool, the height is 400mm. When the sewage in the three secondary sub-pools accumulates to the upper limit, it flows over the top of the third partition wall to the tertiary pool, and the water filtered by biochar flows out from the water outlet, which can be recycled.

[0056] The foregoing basic examples and each further selected example of the present application can be freely combined to form multiple embodiments, all of which are embodiments that can be used and claimed by the present application. In the present application, each selected example can be arbitrarily combined with any basic example and selected example.

[0057] The above is only the preferred embodiment of the present application, and does not limit the present application, any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A multi-channel variable-volume microalgae photobioreactor, comprising a reaction tank (1), characterized in that: The reaction tank (1) is arranged with a first partition wall (3) and a third partition wall (7) in sequence along the flow direction. The first partition wall (3) and the third partition wall (7) divide the reaction tank (1) into a primary tank, a secondary tank and a tertiary tank. A second partition wall (6) is arranged in the reaction tank (1) between the first partition wall (3) and the third partition wall (7). The second partition wall (6) divides the secondary tank into at least two secondary sub-tanks. The second partition wall (6) is a telescopic structure. The first partition wall (3) and / or the third partition wall (7) are horizontally movable in the reaction tank (1).

2. The multi-channel variable-volume microalgae photobioreactor according to claim 1, characterized in that: The reaction tank (1) is equipped with an inlet pipe (2) that connects to the first-stage tank. A cushion layer (4) is arranged in the first-stage tank. A water distribution pipe (5) that connects the first-stage tank and the second-stage sub-tank is arranged on the first partition wall (3). Microalgae are present in the second-stage tank. A filter layer (8) is arranged in the third-stage tank. An outlet pipe (9) that connects to the third-stage tank is arranged on the reaction tank (1). A light-transmitting cover plate (10) covers the reaction tank (1).

3. The multi-channel variable-volume microalgae photobioreactor according to claim 1 or 2, characterized in that: The second partition wall (6) divides the secondary pool into three secondary sub-pools. The first partition wall (3) is fixed inside the reaction pool (1), and the third partition wall (7) is horizontally movable inside the reaction pool (1).

4. The multi-channel variable-volume microalgae photobioreactor according to claim 1 or 2, characterized in that: The reaction tank (1) includes a base plate (11) at the bottom and a surrounding wall (12). The base plate (11) is a reinforced concrete structure and the surrounding wall (12) is a masonry structure.

5. The multi-channel variable-volume microalgae photobioreactor according to claim 2, characterized in that: The inlet pipe (2) is made of variable diameter PE material, the water distribution pipe (5) and the outlet pipe (9) are made of PE material, and the inlet of the water distribution pipe (5) and the outlet pipe (9) is equipped with a filter screen (13).

6. The multi-channel variable-volume microalgae photobioreactor according to claim 1 or 2, characterized in that: The first partition wall (3) is a masonry structure, the second partition wall (6) is a stainless steel structure, and the third partition wall (7) is a precast reinforced concrete structure.

7. The multi-channel variable-volume microalgae photobioreactor according to claim 2, characterized in that: The cushion layer (4) includes a lower fill layer (14) and an upper impermeable concrete layer (15). An aeration disc is arranged in the secondary sub-pool, and the filter layer (8) is a biochar layer.

8. The multi-channel variable-volume microalgae photobioreactor according to claim 2, characterized in that: An insect-proof net (16) is provided between the reaction tank (1) and the light-transmitting cover plate (10).

9. The multi-channel variable-volume microalgae photobioreactor according to claim 8, characterized in that: The light-transmitting cover (10) is made of tempered glass, and the insect-proof net (16) is made of nylon thread.

10. The multi-channel variable-volume microalgae photobioreactor according to claim 1 or 2, characterized in that: The wastewater contact surfaces of the reaction tank (1), the first partition wall (3), the second partition wall (6) and the third partition wall (7) are all coated with a root-penetration resistant waterproof coating.

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