Sewage treatment device for quantitatively conveying solidified algae

Abstract

The utility model discloses a sewage treatment device for quantitatively conveying and solidifying algae, which comprises a solidifying pool, a storage bin, a quantitative feeding assembly and a mixing assembly, the solidifying pool and the storage bin are arranged front and back, a feeding pipe of the quantitative feeding assembly is connected with the storage bin, a discharging pipe of the quantitative feeding assembly is arranged above the solidifying pool, the storage bin is used for storing a fixing agent, and the mixing assembly is arranged above the solidifying pool. The quantitative feeding assembly is used for quantitatively feeding the fixing agent in the discharging bin into the curing pool. Through the arrangement of the quantitative feeding assembly, a fixing agent can be quantitatively added into the solidification pool according to the microalgae density of a microalgae culture solution in the solidification pool, the microalgae cell embedding effect is improved, absorption is easy, growth and metabolism are promoted, and the pollutant removal effect is improved; the cured microalgae culture solution can be used for sewage treatment, is beneficial to low-carbon and resourceful treatment, follows the concept of sustainable development, and brings indirect economic value.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a sewage treatment device for quantitatively conveying solidified algae. Background Art

[0002] With the rapid development of the economy, related environmental problems are emerging one after another. Water pollution, which is closely related to human life and health, is becoming increasingly prominent and, to a certain extent, is also restricting social and economic development. Traditional sewage treatment processes mainly rely on activated sludge to effectively remove pollutants such as COD, nitrogen and phosphorus. They use aeration and other methods to provide oxygen to promote microbial oxidation of COD, and remove nitrogen and phosphorus by adding chemicals. Therefore, the addition of chemicals and other substances for phosphorus removal not only increases operating costs but also may cause secondary pollution. This is actually contrary to the sustainable development concept of low-carbon and energy-saving sewage treatment today and in the future. To a certain extent, it ignores the material cycle and has high investment and operating costs.

[0003] To address these issues, microalgae wastewater treatment technology has emerged. This technology leverages the growth and metabolism of microalgae to efficiently remove harmful substances, such as nitrogen and phosphorus, from wastewater, while also enabling resource recovery and utilization. Compared to traditional wastewater treatment processes, microalgae wastewater treatment technology is more aligned with the principles of low-carbon, energy-saving, and sustainable development. It also eliminates the need for chemical agents and avoids secondary water pollution.

[0004] Although microalgae wastewater treatment technology has many potential advantages, there are still some problems in its actual application. For example, the microalgae solidification process is one of the important steps in microalgae wastewater treatment. It is a process of adding a fixative to the microalgae culture solution to fix the free microalgae cells on a specific carrier to form a stable biofilm. First, during the treatment process, it is difficult to determine the amount of fixative to be added based on the density of the microalgae. If the amount of fixative added is too much, it will limit the normal respiration and photosynthesis of the cells, resulting in a decrease in cell activity. If the amount added is too little, it will not provide enough attachment sites, resulting in the microalgae cells being unable to firmly attach to the carrier and easily falling off, affecting the stability of the biofilm. Secondly, the timing of adding the fixative is also difficult to determine, so there are problems such as complex operation and high technical difficulty. This not only increases the treatment cost and time, but may also affect the embedding effect of the microalgae cells and the sewage treatment effect. Utility Model Content

[0005] The purpose of the present utility model is to provide a wastewater treatment device for quantitatively delivering solidified algae, so as to solve one or more technical problems existing in the above-mentioned background technology.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] A quantitative delivery solidified algae wastewater treatment device comprises a solidification tank, a storage bin, a quantitative feeding component and a mixing component. The solidification tank and the storage bin are arranged in front and behind each other. The feed pipe of the quantitative feeding component is connected to the storage bin. The discharge pipe of the quantitative feeding component is arranged above the solidification tank. The storage bin is used to store a fixing agent. The quantitative feeding component is used to quantitatively feed the fixing agent in the discharge bin into the solidification tank.

[0008] Preferably, a chlorophyll fluorescence meter is further included, wherein the detection probe of the chlorophyll fluorescence meter extends into the solidification tank, and the chlorophyll fluorescence meter is used to detect the density of microalgae in the solidification tank.

[0009] Preferably, the quantitative feeding assembly includes a quantitative cylinder, a movable plug, a one-way valve and a driving component. The movable plug is arranged in the quantitative cylinder. The changing chamber of the quantitative cylinder is respectively connected to the feed pipe and the discharge pipe. The feed pipe and the discharge pipe are both provided with a one-way valve. The movable plug is connected to the movable end of the driving component, and the driving component is used to drive the movable plug to move back and forth.

[0010] Preferably, the driving component includes a servo motor, a lead screw and a lead screw nut, the rotating shaft end of the servo motor is connected to one end of the lead screw, the other end of the lead screw is provided with a bearing seat, the lead screw nut is engaged with the lead screw, and the lead screw nut is connected to the movable plug.

[0011] Preferably, the driving component further includes a guide rail and a slider, the guide rail is arranged parallel to the movable plug, the slider is slidably engaged with the guide rail, and the slider is connected to the piston rod of the movable plug.

[0012] Preferably, the mixing assembly includes a horizontal connecting rod, a vertical connecting rod and a plurality of connecting plates, one end of the horizontal connecting rod is connected to the movable end of the driving component, the other end of the horizontal connecting rod extends to the top of the solidification pool and is connected to the vertical connecting rod, and the plurality of connecting plates are evenly distributed on the outside of the vertical connecting rod.

[0013] Preferably, the mixing assembly further comprises a guide sleeve, the guide sleeve is provided between the solidification tank and the storage bin, and the horizontal connecting rod is in sliding engagement with the guide sleeve.

[0014] Preferably, an electric valve is provided at the bottom of the solidification tank.

[0015] The beneficial effects of the utility model are as follows: by setting a quantitative feeding component, a fixative can be quantitatively added to the solidification pool according to the microalgae density of the microalgae culture solution in the solidification pool, thereby improving the embedding effect of the microalgae cells, facilitating absorption and promoting growth metabolism, and thus facilitating improving the pollutant removal effect; the solidified microalgae culture solution can be used for sewage treatment, which is conducive to low-carbon and resource-based treatment, adheres to the concept of sustainable development, and brings indirect economic value. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings further illustrate the present invention, but the contents in the accompanying drawings do not constitute any limitation to the present invention.

[0017] Figure 1 It is a schematic diagram of the overall structure of one embodiment of the present utility model.

[0018] Among them: solidification tank 1, storage bin 2, quantitative feeding component 3, feed pipe 381, discharge pipe 382, mixing component 5, chlorophyll fluorescence meter 6, quantitative cylinder 31, movable plug 32, piston rod 321, one-way valve 33, servo motor 37, screw 39, screw nut 391, guide rail 34, slider 35, horizontal connecting rod 52, vertical connecting rod 54, connecting plate 53, guide sleeve 51, electric valve 44. DETAILED DESCRIPTION

[0019] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0020] A quantitative transport solidified algae wastewater treatment device of this embodiment is shown in the attached Figure 1 , including a curing pool 1, a storage bin 2, a quantitative feeding component 3 and a mixing component 5. The curing pool 1 and the storage bin 2 are arranged in front and behind. The feed pipe 381 of the quantitative feeding component 3 is connected to the storage bin 2. The discharge pipe 382 of the quantitative feeding component 3 is arranged above the curing pool 1. The storage bin 2 is used to store the fixing agent, and the quantitative feeding component 3 is used to quantitatively feed the fixing agent in the discharge bin into the curing pool 1.

[0021] By setting up the quantitative feeding component 3, the fixative can be quantitatively added to the solidification pool 1 according to the microalgae density of the microalgae culture solution in the solidification pool 1, thereby improving the embedding effect of the microalgae cells, facilitating absorption and promoting growth and metabolism, and thus improving its pollutant removal effect.

[0022] Preferably, a chlorophyll fluorescence meter 6 is also included, with its detection probe extending into the solidification tank 1. The chlorophyll fluorescence meter 6 is used to detect the density of microalgae within the solidification tank 1. The chlorophyll fluorescence meter 6 utilizes the absorption and emission peaks of chlorophyll in the spectrum to emit monochromatic light of a specific wavelength into the water. Chlorophyll A in the water absorbs the energy of this monochromatic light and releases monochromatic light of another wavelength. The intensity of the light emitted by chlorophyll A is proportional to the chlorophyll A content in the water. This is used to calculate the chlorophyll concentration in the water and, in turn, to estimate the microalgae cell density. Thus, by installing the chlorophyll fluorescence meter 6, the microalgae density in the microalgae culture solution can be detected, facilitating the adjustment of the timing and amount of subsequent fixative addition.

[0023] Preferably, the quantitative feeding assembly 3 includes a quantitative cylinder 31, a movable plug 32, a one-way valve 33 and a driving component. The movable plug 32 is arranged in the quantitative cylinder 31. The changing chamber of the quantitative cylinder 31 is respectively connected to the feed pipe 381 and the discharge pipe 382. The feed pipe 381 and the discharge pipe 382 are both provided with a one-way valve 33. The movable plug 32 is connected to the movable end of the driving component, and the driving component is used to drive the movable plug 32 to move back and forth.

[0024] Thus, during the dosing process, the driving component drives the movable plug 32 to move within the metering cylinder 31, causing the variable chamber of the metering cylinder 31 to expand, and the fixative is extracted and fills the variable chamber of the metering cylinder 31, thereby achieving quantitative extraction of the fixative. The driving component then drives the movable plug 32 to move in the opposite direction, and the fixative temporarily stored in the metering cylinder 31 is sprayed out from the discharge pipe 382, thereby achieving quantitative dosing of the fixative. By providing one-way valves 33 on the feed pipe 381 and the discharge pipe 382, backflow of the fixative is prevented, ensuring the normal operation of the device.

[0025] Furthermore, the drive components include a servo motor 37, a lead screw 39, and a lead screw nut 391. The rotating shaft end of the servo motor 37 is connected to one end of the lead screw 39. The other end of the lead screw 39 is provided with a bearing seat. The lead screw nut 391 engages with the lead screw 39, and the lead screw nut 391 is connected to the movable plug 32. The servo motor 37 drives the rotation of the lead screw 39, and the engagement of the lead screw 39 and the lead screw nut 391 achieves efficient conversion of rotational motion to linear motion, resulting in high transmission efficiency and ensuring the feeding accuracy of the quantitative feeding assembly 3.

[0026] Preferably, the driving component further includes a guide rail 34 and a slider 35. The guide rail 34 is arranged parallel to the movable plug 32. The slider 35 slides with the guide rail 34 and is connected to the piston rod 321 of the movable plug 32. The guide rail 34 is used to guide the linear motion of the piston rod 321, further ensuring the accuracy of feeding.

[0027] Preferably, the mixing assembly 5 includes a horizontal connecting rod 52, a vertical connecting rod 54, and a plurality of connecting pieces 53. One end of the horizontal connecting rod 52 is connected to the movable end of the driving component, and the other end of the horizontal connecting rod 52 extends above the curing tank 1 and is connected to the vertical connecting rod 54. The plurality of connecting pieces 53 are evenly distributed on the outside of the vertical connecting rod 54. The horizontal connecting rod 52 is connected to the slider 35 so that when the servo motor 37 drives the movable plug 32 to move, the horizontal connecting rod 52 also drives the vertical connecting rod 54 to move back and forth, so that the fixing agent is evenly distributed in the curing tank 1.

[0028] Preferably, the mixing assembly 5 further includes a guide sleeve 51 , which is provided between the solidification tank 1 and the storage bin 2 , and the horizontal connecting rod 52 is slidably fitted with the guide sleeve 51 . The guide sleeve 51 supports the horizontal connecting rod 52 .

[0029] Preferably, an electric valve 44 is provided at the bottom of the solidification tank 1. The electric valve 44 is provided to control the discharge of the microalgae culture solution in the solidification tank 1. In actual use, the electric valve 44 can be connected to a sewage treatment tank, and the solidified microalgae culture solution is added to the sewage treatment tank to achieve the microalgae sewage treatment process.

[0030] The working principle of this embodiment is as follows: when using solidified algae technology to treat sewage, the relevant operation and maintenance personnel will use the digital chlorophyll fluorescence instrument 6 to understand the algae density in the solidification pool 1 within 2-3 days of the algae treatment cycle in the solidification pool 1, and select different microalgae to treat the sewage. The wavelength of the strongest chlorophyll absorption area is different. According to relevant research, when the light, temperature and pH are constant, the microalgae density is about 10 6 cells / L, the removal effect of immobilized microalgae is better; the performance of algae balls is related to the concentration of the fixative, and the performance of algae balls is optimal with a 5% fixative concentration (sodium alginate). Therefore, when the wavelength absorbed by the chlorophyll A of the microalgae in the solidification tank 1 detected by the digital chlorophyll fluorescence instrument 6 used by the relevant operation and maintenance personnel reaches the logarithmic growth phase, the microalgae density reaches 10 6When the number of cells / L reaches 1, the digital chlorophyll fluorescence meter 6 feeds a signal back to the electronic control system. The PLC controller controls the rotation of the servo motor 37, which in turn controls its speed. The rotation of the servo motor 37 drives the lead screw, which, in engagement with the lead screw nut 39, moves the slider 35. The slider 35, via the piston rod 321, moves the movable stopper 32, which in turn moves the fixative (2-5% sodium alginate) contained in the storage bin 2 through the feed pipe 381 and into the metering cylinder 31. The amount of fixative can be controlled by the electronic control system based on the density of the microalgae. A microalgae to fixative ratio of 10:13 is used to achieve quantitative delivery of the fixative. This results in a stronger gel, better mass transfer performance, and enhanced algal cell encapsulation, which facilitates absorption and promotes growth and metabolism, thereby improving pollutant removal. Once the set amount of fixative has been drawn into the inner cavity of metering cylinder 31, the PLC controller controls servo motor 37 to reverse, pushing piston rod 321 and moving movable stopper 32 in the opposite direction, spraying the fixative into solidification tank 1 through discharge pipe 382. Simultaneously, 2-3% calcium chloride is added to solidification tank 1 through other feeding devices or by relevant operation and maintenance personnel. Because its concentration does not affect the growth and reproduction of microalgae, this device does not serve as a quantitative control. The movement of slider 35 also slightly drives the movement of vertical connecting rod 54. The action of connecting piece 53 ensures that the fixative is evenly distributed within solidification tank 1, facilitating the immobilization of the microalgae. After 16 hours of solidification, the immobilized microalgae are precipitated, and the PLC controller controls the electric valve 44 to open, so that the immobilized microalgae can enter the sewage pool after pretreatment (the amount of immobilized microalgae entering the sewage pool depends on the amount of sewage to be treated. Not all of them enter, and some are left for the immobilized microalgae to continue growing and reproducing, which will be used as a reserve for future sewage treatment). The immobilized microalgae sewage treatment is carried out for 3-7 days. The chlorophyll a concentration of the immobilized microalgae is increased, which can effectively remove nitrogen, phosphorus and COD pollutants in the sewage, and its removal rate is higher than that of free algae cells. If the operation and maintenance personnel detect the chlorophyll a in the solidification pool 1 through the chlorophyll fluorescence instrument 6 within a certain period (7 days), when the corresponding algae cell density is far greater than 10 6 cells / L, the immobilized microalgae can be collected and processed for resource utilization, such as lipid extraction to produce biodiesel, high-protein feed, and biogas, which has certain economic value. Within a certain period (25 days), the accumulation of some metabolites or dead microalgae will accumulate at the bottom of solidification tank 1, and relevant operation and maintenance personnel need to clean it up.

[0031] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are intended solely to illustrate the principles of the present invention and should not be construed in any way as limiting the scope of protection of the present invention. Based on the explanations herein, those skilled in the art will be able to devise other specific implementations of the present invention without inventive effort, and such implementations will fall within the scope of protection of the present invention.

Claims

1. A quantitative delivery solidified algae wastewater treatment device, characterized in that: It includes a curing pool, a storage bin, a quantitative feeding component and a mixing component. The curing pool and the storage bin are arranged in front and behind each other. The feed pipe of the quantitative feeding component is connected to the storage bin. The discharge pipe of the quantitative feeding component is arranged above the curing pool. The storage bin is used to store the fixing agent. The quantitative feeding component is used to quantitatively feed the fixing agent in the storage bin into the curing pool.

2. The device for quantitatively transporting solidified algae wastewater according to claim 1, characterized in that: It also includes a chlorophyll fluorescence meter, a detection probe of the chlorophyll fluorescence meter extends into the solidification pool, and the chlorophyll fluorescence meter is used to detect the density of microalgae in the solidification pool.

3. The device for quantitatively transporting solidified algae wastewater according to claim 1, characterized in that: The quantitative feeding assembly includes a quantitative cylinder, a movable plug, a one-way valve and a driving component. The movable plug is arranged in the quantitative cylinder. The changing chamber of the quantitative cylinder is connected with the feed pipe and the discharge pipe respectively. The feed pipe and the discharge pipe are both provided with a one-way valve. The movable plug is connected with the movable end of the driving component, and the driving component is used to drive the movable plug to move back and forth.

4. The device for quantitatively transporting solidified algae wastewater according to claim 3, characterized in that: The driving component includes a servo motor, a lead screw and a lead screw nut. The rotating shaft end of the servo motor is connected to one end of the lead screw. The other end of the lead screw is provided with a bearing seat. The lead screw nut is engaged with the lead screw and is connected to the movable plug.

5. The device for quantitatively transporting solidified algae wastewater according to claim 3, characterized in that: The driving component further comprises a guide rail and a slider, wherein the guide rail is arranged parallel to the movable plug, the slider is slidably matched with the guide rail, and the slider is connected to the piston rod of the movable plug.

6. The device for quantitatively transporting solidified algae wastewater according to claim 3, characterized in that: The mixing assembly includes a horizontal connecting rod, a vertical connecting rod and multiple connecting plates. One end of the horizontal connecting rod is connected to the movable end of the driving component, and the other end of the horizontal connecting rod extends to the top of the solidification pool and is connected to the vertical connecting rod. Multiple connecting plates are evenly distributed on the outside of the vertical connecting rod.

7. The device for quantitatively transporting solidified algae wastewater according to claim 6, characterized in that: The mixing assembly further comprises a guide sleeve, which is provided between the solidification tank and the storage bin, and the horizontal connecting rod is in sliding engagement with the guide sleeve.

8. The device for quantitatively transporting solidified algae wastewater according to claim 1, characterized in that: An electric valve is provided at the bottom of the solidification tank.

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