Improved septic tank structure for improving black water resource utilization capacity

Abstract

The application discloses an improved septic tank structure for improving black water resource utilization capacity, which comprises a septic tank first compartment, a septic tank second compartment and a septic tank third compartment. The septic tank first compartment is used for allowing the middle layer of excrement liquid to enter the septic tank second compartment after the layered black water is introduced. The septic tank second compartment is used for further anaerobic fermentation of the excrement liquid and then discharging the excrement liquid to the septic tank third compartment. The septic tank third compartment is provided with a plurality of biological rotating discs which are exposed to a predetermined height of sewage liquid surface and can continuously rotate in the sewage. When the rotating shaft of the biological rotating disc is driven to rotate, the fan frame rotating out of the sewage liquid surface improves the dissolved oxygen content of the water film outside the biological membrane. When the rotating shaft is driven to rotate, the fan frame rotating into the sewage liquid surface absorbs the organic pollutants in the sewage through the biological membrane outside the fan frame and absorbs the dissolved oxygen in the water film outside the biological membrane to decompose the absorbed organic pollutants.

Description

Technical Field

[0001] This invention relates to a blackwater treatment system, and more particularly to an improved septic tank structure that enhances the resource utilization capacity of blackwater. Background Technology

[0002] In existing technologies, rural toilet wastewater (i.e., black water) is mostly treated harmlessly using three-compartment septic tanks. After treatment, part of it is used for agricultural planting, and the excess drainage flows into the sewage collection network by gravity.

[0003] Three-compartment septic tanks are simple in structure, inexpensive to build, and require no power, making them one of the main technologies for pre-treatment of toilet waste in rural areas. They primarily utilize sedimentation and anaerobic fermentation to remove organic matter and pathogens from wastewater, while simultaneously converting organic nitrogen and phosphorus into inorganic nitrogen and phosphorus, thus achieving the resource utilization of toilet waste.

[0004] However, the COD of the effluent from existing three-compartment septic tanks is still relatively high, failing to meet the requirements for irrigation water quality in farmland. Furthermore, long-term use of wastewater with excessive COD poses a series of hidden dangers, including soil degradation and root rot in crops. In addition, the nitrogen in the effluent from septic tanks is mainly ammonia nitrogen. For crops or vegetables in farmland, to achieve the expected yield, it is insufficient for crops to absorb only ammonia nitrogen; they also need to absorb some nitrate nitrogen. The existing septic tank structure is unable to meet these requirements. Summary of the Invention

[0005] This invention addresses the shortcomings of existing technologies by providing an improved septic tank structure that enhances the utilization of blackwater resources.

[0006] The improved septic tank structure for enhancing the utilization of blackwater resources according to the present invention includes a first septic tank compartment, a second septic tank compartment, and a third septic tank compartment arranged in sequence. The first septic tank compartment anaerobically ferments and decomposes the incoming blackwater into layers, and allows the sewage in the middle layer to enter the second septic tank compartment.

[0007] The second compartment of the septic tank further anaerobically ferments the incoming sewage before discharging it into the third compartment.

[0008] The third compartment of the septic tank is equipped with an air circulation channel that connects to the outside, and inside it are multiple biological rotating discs that are exposed above the sewage surface at a predetermined height and can rotate continuously in the sewage.

[0009] The biological rotating disk includes a rotating shaft and a plurality of fan frames arranged alternately in the circumferential direction along the axial direction of the rotating shaft on the outer edge of the rotating shaft, and the fan frames are covered with a biofilm.

[0010] When the shaft is driven to rotate, the fan frame that rotates out of the sewage surface increases the dissolved oxygen content through the water film outside the biofilm covering it.

[0011] When the shaft is driven to rotate, the fan frame that rotates into the sewage surface adsorbs organic pollutants in the sewage through the biofilm covering it, and absorbs dissolved oxygen from the water film outside the biofilm to decompose the adsorbed organic pollutants.

[0012] In the improved septic tank structure for enhancing the utilization of blackwater resources described in this invention, the biological rotating disc is immersed to a depth of 1 / 3 to 1 / 2 of the diameter of the outer contour of the circle formed by the outer edges of each fan frame.

[0013] In the improved septic tank structure for enhancing the utilization of black water resources described in this invention, a vertically inserted separation baffle is provided on the side of the first compartment of the septic tank near the outlet, and an overflow channel is formed between the bottom end of the separation baffle and the bottom of the first compartment of the septic tank.

[0014] A vertically inserted partition is provided in the middle of the second compartment of the septic tank, and the bottom end of the partition forms a sewage overflow channel between the bottom of the second compartment of the septic tank and the bottom of the tank.

[0015] In the improved septic tank structure for enhancing the utilization of blackwater resources described in this invention, the third compartment of the septic tank is provided with an overflow weir at the outlet corresponding to the second compartment of the septic tank for filtering out suspended solids in the sewage.

[0016] In the improved septic tank structure for enhancing the utilization of black water resources described in this invention, multiple curved through grooves for securing the fan frame are opened on the outer edge of the rotating shaft perpendicular to the axial direction of the rotating shaft. The upper edge of one side of the curved through groove has a gap groove that extends to the outer wall of the rotating shaft.

[0017] The fan frame includes curved rail posts and a mounting frame for placing the biofilm, which is erected next to the curved rail posts.

[0018] The curved rail post can be driven by an external force from one end of the curved through groove to slide into the curved sliding groove, and is positioned by positioning plugs located at both ends of the curved through groove.

[0019] The mounting frame extends vertically from the gap groove to the outer wall of the rotating shaft.

[0020] The improved septic tank structure for enhancing the utilization of black water resources according to the present invention also includes a slide rail disposed on the side wall of the third compartment of the septic tank.

[0021] The end of the rotating shaft is located inside the slide rail and can move along the slide rail to support the biological rotating disc to protrude above the sewage surface at a predetermined height.

[0022] It also includes a lifting drive device for driving the end of the rotating shaft to move along the slide rail, and a rotation drive device for driving the rotating shaft to rotate.

[0023] It also includes a wind and solar power generation device installed outside the third compartment of the septic tank;

[0024] The wind and solar power generation device provides electrical energy to the lifting drive device and the rotation drive device respectively, so that the lifting drive device drives the end of the rotating shaft to move along the slide rail and the rotation drive device drives the rotating shaft to rotate.

[0025] It also includes a position sensing sensor for sensing the current height of the wastewater level;

[0026] The lifting drive device drives the end of the rotating shaft to move along the slide rail according to the sensing signal of the position sensing sensor, so as to maintain the biological rotating plate exposed above the sewage surface to a predetermined height.

[0027] In the improved septic tank structure for enhancing the utilization of black water resources described in this invention, insertion positioning holes are respectively provided at both ends of the curved rail column;

[0028] The positioning plug includes a positioning pin for inserting into the insertion positioning hole to position the curved rail post in the curved through groove, and a bidirectional driver for driving the positioning pin to be inserted into the insertion positioning hole or driving the positioning pin to be disengaged from the insertion positioning hole.

[0029] In the improved septic tank structure for enhancing the utilization capacity of black water resources described in this invention, the bidirectional actuator includes a unidirectional limiting pivot shaft and a bidirectional driving pivot shaft arranged opposite to each other, and also includes a sliding top rod, an elastic locking arm, an elastic driving shaft, and an elastic driving arm disposed between the unidirectional limiting pivot shaft and the bidirectional driving pivot shaft.

[0030] The sliding top rod has a protruding abutment on the side facing the elastic drive arm, and can be driven by the one-way limiting pivot to move to the abutment position, or driven by the two-way drive pivot to move to the disengagement position by rotating in the forward direction.

[0031] One end of the elastic locking arm is rotatably mounted on the elastic drive shaft, and the other end of the elastic locking arm elastically abuts against the sliding top rod which is in the abutting position or the disengaged position.

[0032] One end of the elastic drive arm is rotatably mounted on the elastic drive shaft, and the other end of the elastic drive arm has a protruding limiting part on the side facing the sliding top rod. The positioning pin is located on the side of the other end of the elastic drive arm facing away from the sliding top rod.

[0033] When the sliding top rod is in the abutting position, the abutting top abuts against the limiting part, so that the positioning pin on the elastic drive arm is inserted into the insertion positioning hole and cannot be dislodged;

[0034] When the sliding top rod is in the disengaged position, the abutment top and the limiting part are misaligned. The other end of the elastic drive arm is driven by the bidirectional drive pivot to rotate in the opposite direction and deflect towards the sliding top rod, causing the positioning pin to disengage from the insertion positioning hole.

[0035] In the improved septic tank structure for enhancing the utilization of black water resources described in this invention, the one-way limiting pivot shaft includes a one-way pivot and a rotatable one-way fork sleeved on the one-way pivot. The one-way fork has a one-way operating hole that exposes the outer wall of the pivot shaft and can be driven to rotate by a one-way operating tool inserted into the one-way operating hole, so as to move the sliding top rod to the top position.

[0036] The bidirectional drive pivot shaft includes a bidirectional pivot and a bidirectional shift fork rotatably fitted on the bidirectional pivot. The bidirectional shift fork has a bidirectional operating hole that exposes the outer wall of the pivot shaft and can be driven to rotate by a bidirectional operating tool inserted into the bidirectional operating hole, so as to move the sliding push rod to the disengaged position or to deflect the other end of the elastic drive arm toward one end of the sliding push rod.

[0037] In the improved septic tank structure for enhancing the utilization of black water resources described in this invention, a wind cap is provided at the end of the air circulation channel located outside the third compartment of the septic tank.

[0038] In the improved septic tank structure for enhancing the utilization of blackwater resources described in this invention, a biological rotating disc is installed in the third compartment of the septic tank, which is immersed to a predetermined depth into the sewage surface. This biological rotating disc effectively reduces the concentration of organic pollutants in the effluent from the septic tank and can also directionally regulate the ratio of nitrates to ammonium salts to reduce the ammonium salt concentration, making the effluent more suitable for farmland irrigation. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the improved septic tank structure for enhancing the resource utilization capacity of black water as described in this invention.

[0040] Figure 2 This is a schematic diagram of the biological rotating disc in the improved septic tank structure for enhancing the utilization of black water resources as described in this invention.

[0041] Figure 3 This is a top view schematic diagram of the biological rotating disc in the improved septic tank structure for enhancing the utilization of blackwater resources as described in this invention.

[0042] Figure 4 This is a cross-sectional schematic diagram of the biological rotating disc in the improved septic tank structure for enhancing the utilization of blackwater resources as described in this invention.

[0043] Figure 5 This is a schematic diagram of the positioning plug in the improved septic tank structure for enhancing the utilization of black water resources as described in this invention.

[0044] Figure 6 This is another schematic diagram of the positioning plug in the improved septic tank structure for enhancing the utilization of black water resources as described in this invention.

[0045] Figure 7 This is another structural schematic diagram of the positioning plug in the improved septic tank structure for enhancing the utilization of black water resources as described in this invention. Detailed Implementation

[0046] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0047] like Figure 1 , Figure 2 As shown, the improved septic tank structure for enhancing the utilization of black water resources according to the present invention includes a first septic tank compartment 1, a second septic tank compartment 2, and a third septic tank compartment 3 arranged sequentially.

[0048] The first compartment 1 of the septic tank performs anaerobic fermentation and decomposition of the black water fed into it by the connector 13, which is divided into an upper layer of fecal scum, a middle layer of fecal liquid, and a bottom layer of fecal sludge. This removes some pollutants, traps and precipitates parasite eggs, and traps and precipitates most of the solid matter. This makes the sewage in the first compartment 1 of the septic tank relatively still or flows slowly, with a longer hydraulic retention time, which is conducive to fermentation and reducing the COD of the sewage. Then, the fecal liquid in the middle layer is discharged through the outlet 11 and enters the second compartment 2 of the septic tank. Furthermore, a vertically inserted separation baffle 12 can be installed on the side of the first compartment 1 of the septic tank near the outlet 11 (for example, at a distance of 1 / 5 of the length of the first compartment 1 from the outlet 11). The insertion depth of the separation baffle 12 is 3 / 5 of the septic tank depth, forming an overflow channel 14 between the bottom of the separation baffle 12 and the bottom of the first compartment 1. This reduces the amount of upper scum and bottom sludge entering the second compartment 2 of the septic tank, ensuring that only the middle layer of sludge enters the second compartment 2, thereby reducing the concentration of suspended solids in the second compartment 2. Similar to the first compartment 1, the second compartment 2 continues to anaerobic ferment the incoming sludge to retain and precipitate parasite eggs. Through deep anaerobic fermentation, the concentration of free ammonia increases, achieving the purpose of sterilization and egg killing. The solid matter in the sewage in the second compartment 2 is significantly reduced, and the sewage flow is also slower. The sewage in the second compartment 2 of the septic tank is discharged into the third compartment 3 of the septic tank through the outlet 21.

[0049] Furthermore, in the improved septic tank structure for enhancing the utilization of black water resources described in this invention, a vertically inserted baffle 22 is also provided in the middle of the second compartment 2 of the septic tank. The bottom end 221 of the baffle 22 forms a sewage overflow channel 23 between it and the bottom of the second compartment 2 of the septic tank. In this way, the sewage (i.e., black water) entering from the first compartment 1 of the septic tank will flow from the sewage overflow channel 23 to the rear half of the second compartment 2 of the septic tank after falling into the first half of the second compartment 2. This can play a role in blocking and settling suspended solids, and avoid excessively high suspended solids content.

[0050] The third compartment 3 of the septic tank is equipped with an overflow weir 32 at the outlet 21 corresponding to the second compartment 2 of the septic tank to filter out suspended solids in the sewage. The overflow weir 32 allows suspended solids to be retained while allowing sewage to leak out. The third compartment 3 is also equipped with an air circulation channel 31 that communicates with the outside to ensure good air circulation and maintain redox environmental conditions. A protective vent cap 311 is installed at the outer end of the air circulation channel 31. While pathogens and insect eggs in the sewage of the current third compartment 3 have been largely killed and removed, the concentration of organic pollutants such as organic carbon, organic nitrogen, and ammonia nitrogen remains high. Therefore, this invention also includes multiple biological rotating discs 34 inside the third compartment 3, protruding above the sewage surface at a predetermined height and capable of continuous rotation in the sewage.

[0051] The biological rotating disc 34 includes a rotating shaft 4 and multiple fan frames 5 arranged circumferentially along the axial direction of the rotating shaft 4 on its outer edge (for example, the multiple fan frames 5 are grouped, and each group of fan frames 5 is evenly distributed circumferentially along the circumferential direction of the rotating shaft 4; at the same time, the fan frames 5 of each group are staggered along the axial direction of the rotating shaft 4). The fan frames 5 are covered with a biofilm 50. The biofilm 50 is formed naturally by the biological rotating disc 34 through alternating contact with sewage and air during rotation, and the number of bacteria related to the conversion of organic carbon, organic nitrogen, and ammonia nitrogen in it will continuously increase.

[0052] When the rotating shaft 4 is driven to rotate, the fan frame 5 rotating out of the sewage surface increases the dissolved oxygen content through the water film outside its outer biofilm 50. That is, the biofilm 50 comes into contact with air, causing air to continuously dissolve into the water film outside the biofilm 50, thereby increasing the dissolved oxygen content of the water film outside the biofilm 50. As for the fan frame 5 rotating into the sewage surface, it adsorbs organic pollutants in the sewage through its outer biofilm 50 and absorbs dissolved oxygen from the water film outside the biofilm 50 to decompose the adsorbed organic pollutants. In other words, the biofilm 50 adsorbs organic pollutants (such as organic carbon, organic nitrogen, or ammonia nitrogen) in the sewage and absorbs dissolved oxygen from the water film outside the biofilm 50 to decompose the adsorbed organic pollutants. During the continuous rotation of the rotating shaft 4, the biofilm 50 attached to the fan frame 5, in addition to the transfer of organic pollutants (such as BOD and COD) and oxygen, also transfers other substances (such as CO2 and NH3) between the sewage and the air, forming a continuous process of adsorption, oxidation decomposition, and oxygen absorption, thus continuously purifying the sewage. After the above treatment, the concentration of organic pollutants in the septic tank effluent can be effectively reduced, and the ratio of nitrates to ammonium salts can be directionally controlled by adjusting the rotation speed of the rotating shaft 4 to reduce the ammonium salt concentration, making the effluent more suitable for farmland irrigation. In specific applications, the biological rotating disc 34 can be immersed to a depth of 1 / 3 to 1 / 2 of the diameter of the outer circumference formed by the outer edges of each fan frame 5 below the sewage surface.

[0053] In the improved septic tank structure for enhancing blackwater resource utilization described in this invention, the biological rotating disc 34 is a consumable and needs to be replaced during use. To facilitate disassembly and replacement of the biological rotating disc 34, in this embodiment, as follows... Figure 2 , Figure 3 , Figure 4As shown, multiple curved through grooves 41 for securing the fan frame 5 are formed perpendicular to the axial direction of the rotating shaft 4 on its outer edge. Simultaneously, a gap groove 43 extending to the outer wall of the rotating shaft 4 is formed on the upper edge of one side (towards the right in this embodiment). Correspondingly, the fan frame 5 includes a curved rail post 52 and a mounting frame 51 for placing the biofilm 50, erected beside the curved rail post 52. The curved rail post 52 can be driven by an external force from one end of the curved through groove 41 and slide into the curved groove 41, where it is positioned by positioning inserts 6 located at both ends of the curved through groove 41. The mounting frame 51 extends vertically from the gap groove 43 to the outer wall of the rotating shaft 4. In other words, during actual construction, to facilitate operation outside the third compartment 3 of the septic tank to insert the curved rail post 52 into the curved slide groove 41, multiple support grooves 42 corresponding to the arc distribution of the curved slide groove 41 can be opened at the top of the gap groove 43. Simultaneously, longitudinal elongated holes 54 are opened at both ends of the curved rail post 52, and a through groove 55 communicating with the longitudinal elongated holes 54 is opened at the top of the curved rail post 52. Thus, by means of a support rod 90 with a hook 92 at one end and a protruding support post 91 at the front end, the curved rail post 52 can be driven and inserted into the curved slide groove 41. The specific operation involves first inserting the hook 92 into the longitudinal elongated hole 54 through the through groove 55, and then rotating the hook 92 by 90 degrees so that both ends of the hook 92 can engage with the longitudinal elongated hole 54 without dislodging from it. Simultaneously, it can move longitudinally within the longitudinal elongated hole 54, causing the support column 91 to engage with the support groove 42. Thus, when the curved rail column 52 is in different positions within the curved sliding groove 41, the hook 92 can be driven by the hook 92 to slide within the curved sliding groove 41 by engaging the support column 91 with different support grooves 42 and by rotating the other end of the support rod 90.

[0054] In the improved septic tank structure for enhancing blackwater resource utilization described in this invention, each end of the curved track column 52 is provided with an insertion positioning hole 53. The positioning insert 6 includes a positioning pin 67 for insertion into the insertion positioning hole 53 to position the curved track column 52 within the curved through groove 41, and a bidirectional actuator for driving the positioning pin 67 to insert into or disengage from the insertion positioning hole 53. In actual installation, the positioning insert 6 can be placed within a pre-drilled settling space on the rotating shaft 4, with only the positioning pin 67 exposed towards the curved track column 52. Figure 5 , Figure 6 , Figure 7As shown, the bidirectional actuator specifically includes a unidirectional limiting pivot shaft 61 and a bidirectional driving pivot shaft 62 disposed opposite to each other, and also includes a sliding push rod 63, an elastic locking arm 65, an elastic driving shaft 64, and an elastic driving arm 66 disposed between the unidirectional limiting pivot shaft 61 and the bidirectional driving pivot shaft 62. The sliding push rod 63 has a protruding abutment 631 on its side facing the elastic driving arm 66, and can be driven by the unidirectional limiting pivot shaft 61 to translate to the abutment position (the abutment position is as shown in the image). Figure 5 (as shown in the diagram), or driven to translate to the disengaged position by the forward rotation of the bidirectional drive pivot 62 (the disengaged position being as shown in the diagram). Figure 6 (As shown in the figure). In this embodiment, the one-way limiting pivot 61 specifically includes a one-way pivot and a one-way fork 610 rotatably sleeved on the one-way pivot. The one-way fork 610 has a one-way operating hole 611 exposed on the outer wall surface of the pivot 4, so that the one-way operating hole 611 can be driven to rotate by an externally inserted (e.g., from the top opening of the third compartment 3 of the septic tank) one-way operating tool (not shown in the figure), thereby moving the sliding top rod 63 to the abutment position (e.g., as shown in the figure). Figure 5 (As shown). The bidirectional drive pivot 62 specifically includes a bidirectional pivot and a bidirectional fork 620 rotatably sleeved on the bidirectional pivot. The bidirectional fork 620 has a bidirectional operating hole 621 exposed on the outer wall of the pivot 4, so that the bidirectional operating hole 621 can be driven to rotate by a bidirectional operating tool (not shown in the figure) inserted externally (e.g., from the top opening of the third compartment 3 of the septic tank), so as to move the sliding top rod 63 to the disengaged position (e.g., as shown in the figure). Figure 6 (as shown); or, using a two-way operating tool, deflect the other end of the elastic drive arm 66 toward one end of the sliding push rod 63 (as shown). Figure 7 (As shown).

[0055] In this embodiment, one end of the elastic locking arm 65 is rotatably mounted on the elastic drive shaft 64. Under the elastic driving force of the elastic drive shaft 64, the other end of the elastic locking arm 65 elastically abuts against the sliding push rod 63 when it is in the abutting position or the disengaged position. Specifically, two positioning grooves 651 and 652 can be provided on the side of the elastic locking arm 65 that contacts the sliding push rod 63, and a protrusion 630 can be provided on the side of the sliding push rod 63 that contacts the elastic locking arm 65. When the sliding push rod 63 is in the abutting position (e.g., ...), the sliding push rod 63 is in the abutting position. Figure 5 When the sliding rod 630 is engaged in the positioning groove 652, the elastic locking arm 65 holds the sliding rod 63 in the abutting position; when the sliding rod 63 is driven to move to the disengaged position (as shown), the protrusion 630 engages in the positioning groove 652, so that the sliding rod 63 is abutted and limited in the abutting position by the elastic locking arm 65; Figure 6When (as shown), the protrusion 630 is engaged in the positioning groove 651, so that the sliding top rod 63 is blocked and limited to the disengaged position by the elastic locking arm 65.

[0056] One end of the elastic drive arm 66 is rotatably mounted on the elastic drive shaft 64. A protruding limiting part 661 is provided on the side of the other end of the elastic drive arm 66 facing the sliding push rod 63. The positioning pin 67 is provided on the side of the other end of the elastic drive arm 66 facing away from the sliding push rod 63, and can maintain an outward pushing tension under the elastic driving force of the elastic drive shaft 64, so that the positioning pin 67 can be firmly inserted into the insertion positioning hole 53.

[0057] In practical use, the sliding push rod 63 can be driven to translate to the abutment position by operating the one-way limiting pivot shaft 61 (the abutment position is as follows). Figure 5 (as shown in the diagram), or by operating the bidirectional drive pivot 62 to rotate forward, the sliding push rod 63 is driven to translate to the disengaged position (the disengaged position is as shown in the diagram). Figure 6 (As shown in the diagram). When the sliding top rod 63 is in the abutting position, the abutting top 631 abuts against the limiting part 661, preventing the elastic drive arm 66 from being driven to deflect towards the sliding top rod 63 by the bidirectional drive pivot shaft 62. This also ensures that the positioning pin 67 remains inserted into the insertion positioning hole 53 and cannot be dislodged, thus limiting and fixing both ends of the curved rail post 52 inserted in the curved slide groove 41. Furthermore, since the curved rail post 52 and the curved slide groove 41 adopt a corresponding curved structure, the fan frame 5 with the biofilm 50 can be firmly attached to the rotating shaft 4 during rotation without loosening.

[0058] When the sliding push rod 63 is in the disengaged position, the abutment 631 and the limiting part 661 are misaligned, providing space for the limiting part 661 to deflect towards the sliding push rod 63. At this time, the other end of the elastic drive arm 66 is driven to deflect towards the sliding push rod 63 by the bidirectional drive pivot 62, thereby causing the positioning pin 67 to disengage from the insertion positioning hole 53 (e.g., Figure 7(As shown in the diagram). Since the curved rail post 52 is no longer restricted by the positioning post 67, it can be pulled out of the curved slide groove 41 for subsequent maintenance and replacement. In the improved septic tank structure for enhancing blackwater resource utilization described in this invention, a slide rail 36 is also provided on the side wall of the third compartment 3 of the septic tank. The end of the rotating shaft 4 is located within the slide rail 36 and can move up and down along the slide rail 36, thereby supporting the biological rotating plate 34 to protrude above the sewage surface to a predetermined height.

[0059] The improved septic tank structure for enhancing the utilization of black water resources described in this invention further includes a lifting drive device (not shown in the figure, which can be driven by a chain drive method driven by an electric motor or by a direct push method driven by an electric cylinder driven by an electric motor) for driving the end of the rotating shaft 4 to move up and down along the slide rail 36, and a rotation drive device (not shown in the figure, which can be driven by a chain drive method driven by an electric motor) for driving the rotating shaft 4 to rotate.

[0060] To ensure the normal operation of the aforementioned electrically powered lifting and rotating drive devices, a wind and solar power generation device 33 is also installed outside the third compartment 3 of the septic tank. This device provides electrical energy to both the lifting and rotating drive devices, enabling the lifting drive device to move the end of the rotating shaft 4 along the slide rail 36 and the rotating drive device to rotate the shaft 4. The wind and solar power generation device 33 can be a wind turbine, a solar power generator, or a combination of both.

[0061] In order to accurately control the immersion depth of the biological rotating disc 34 in the sewage, that is, to control the biological rotating disc 34 to be exposed above the sewage surface to a predetermined height, the present invention also provides a position sensing sensor (not shown in the figure) for sensing the current height of the sewage surface. The lifting drive device drives the end of the rotating shaft 4 to move along the slide rail 36 according to the sensing signal of the position sensing sensor, so as to maintain the biological rotating disc 34 exposed above the sewage surface to a predetermined height.

[0062] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. An improved septic tank structure for enhancing the utilization capacity of blackwater resources, comprising a first septic tank compartment, a second septic tank compartment, and a third septic tank compartment arranged sequentially, characterized in that, The first compartment of the septic tank anaerobically ferments and decomposes the incoming blackwater into stratified layers, allowing the middle layer of fecal liquid to enter the second compartment. A vertically inserted separation baffle is installed on the side of the first compartment near the outlet, and the bottom of the separation baffle forms an overflow channel with the bottom of the first compartment. The second compartment further anaerobically ferments the incoming fecal liquid before discharging it into the third compartment. A vertically inserted baffle is installed in the middle of the second compartment, and the bottom of the baffle forms an overflow channel with the fecal liquid. The third compartment of the septic tank is equipped with an air circulation channel that connects to the outside, and inside it are multiple biological rotating discs that are exposed above the sewage surface at a predetermined height and continuously rotate in the sewage. The biological rotating disk includes a rotating shaft and a plurality of fan frames arranged alternately in the circumferential direction along the axial direction of the rotating shaft on the outer edge of the rotating shaft, and the fan frames are covered with a biofilm. Multiple curved through grooves for securing the fan frame are formed on the outer edge of the rotating shaft perpendicular to the axial direction of the rotating shaft. The upper edge of one side of the curved through groove has a gap groove that extends to the outer wall of the rotating shaft. The fan frame includes curved rail posts and a mounting frame for placing the biofilm, which is erected next to the curved rail posts. The curved rail post is driven by an external force from one end of the curved through groove and slides into the curved through groove, and is positioned by positioning plugs located at both ends of the curved through groove. The mounting frame extends vertically from the gap groove to the outer wall of the rotating shaft; It also includes a slide rail installed on the side wall of the third compartment of the septic tank; The end of the rotating shaft is disposed within the slide rail and moves along the slide rail to support the biological rotating disc to protrude above the sewage surface at a predetermined height; It also includes a lifting drive device for driving the end of the rotating shaft to move along the slide rail, and a rotation drive device for driving the rotating shaft to rotate. It also includes a wind and solar power generation device installed outside the third compartment of the septic tank; The wind and solar power generation device provides electrical energy to the lifting drive device and the rotation drive device respectively, so that the lifting drive device drives the end of the rotating shaft to move along the slide rail and the rotation drive device drives the rotating shaft to rotate. It also includes a position sensing sensor for sensing the current height of the wastewater level; The lifting drive device drives the end of the rotating shaft to move along the slide rail according to the sensing signal of the position sensing sensor, so as to maintain the biological rotating plate exposed above the sewage surface to a predetermined height; When the shaft is driven to rotate, the fan frame that rotates out of the sewage surface increases the dissolved oxygen content through the water film outside the biofilm covering it. When the shaft is driven to rotate, the fan frame that rotates into the sewage surface adsorbs organic pollutants in the sewage through the biofilm covering it, and absorbs dissolved oxygen from the water film outside the biofilm to decompose the adsorbed organic pollutants.

2. The improved septic tank structure for enhancing the utilization capacity of blackwater resources as described in claim 1, characterized in that, The biological rotating disc is immersed to a depth of 1 / 3 to 1 / 2 of the diameter of the outer contour of the circle formed by the outer edges of each fan frame.

3. The improved septic tank structure for enhancing the utilization capacity of blackwater resources as described in claim 1, characterized in that, The third compartment of the septic tank is equipped with an overflow weir at the outlet corresponding to the second compartment of the septic tank to filter out suspended solids in the sewage.

4. The improved septic tank structure for enhancing the utilization capacity of blackwater resources as described in claim 1, characterized in that, The two ends of the curved rail column are respectively provided with insertion positioning holes; The positioning plug includes a positioning pin for inserting into the insertion positioning hole to position the curved rail post in the curved through groove, and a bidirectional driver for driving the positioning pin to be inserted into the insertion positioning hole or driving the positioning pin to be disengaged from the insertion positioning hole.

5. The improved septic tank structure for enhancing the utilization capacity of blackwater resources as described in claim 4, characterized in that, The bidirectional actuator includes a unidirectional limiting pivot shaft and a bidirectional driving pivot shaft disposed opposite to each other, and also includes a sliding top rod, an elastic locking arm, an elastic driving shaft, and an elastic driving arm disposed between the unidirectional limiting pivot shaft and the bidirectional driving pivot shaft; The sliding top rod has a protruding abutment on the side facing the elastic drive arm, and is driven by the one-way limiting pivot to move to the abutment position, or driven by the two-way drive pivot to move to the disengagement position. One end of the elastic locking arm is rotatably mounted on the elastic drive shaft, and the other end of the elastic locking arm elastically abuts against the sliding top rod which is in the abutting position or the disengaged position. One end of the elastic drive arm is rotatably mounted on the elastic drive shaft, and the other end of the elastic drive arm has a protruding limiting part on the side facing the sliding top rod. The positioning pin is located on the side of the other end of the elastic drive arm facing away from the sliding top rod. When the sliding top rod is in the abutting position, the abutting top abuts against the limiting part, so that the positioning pin on the elastic drive arm is inserted into the insertion positioning hole and cannot be dislodged; When the sliding top rod is in the disengaged position, the abutment top and the limiting part are misaligned. The other end of the elastic drive arm is driven by the bidirectional drive pivot to rotate in the opposite direction and deflect towards the sliding top rod, causing the positioning pin to disengage from the insertion positioning hole.

6. The improved septic tank structure for enhancing the utilization capacity of blackwater resources as described in claim 5, characterized in that, The one-way limiting pivot shaft includes a one-way pivot and a one-way shift fork rotatably sleeved on the one-way pivot. The one-way shift fork has a one-way operating hole that exposes the outer wall of the pivot shaft and is driven to rotate by a one-way operating tool inserted into the one-way operating hole, so as to move the sliding push rod to the abutment position. The bidirectional drive pivot shaft includes a bidirectional pivot and a bidirectional shift fork rotatably mounted on the bidirectional pivot. The bidirectional shift fork has a bidirectional operating hole that exposes the outer wall of the pivot shaft and is driven to rotate by a bidirectional operating tool inserted into the bidirectional operating hole, so as to move the sliding push rod to the disengaged position or to deflect the other end of the elastic drive arm toward one end of the sliding push rod.

7. The improved septic tank structure for enhancing the utilization capacity of blackwater resources as described in claim 1, characterized in that, The air circulation channel is equipped with a vent cap at the end outside the third compartment of the septic tank.

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