A three-chamber septic tank septic tank with automatic dry-wet separation and fermentation system and process

Abstract

The present invention provides a three-compartment septic tank feces automatic dry-wet separation and fermentation system and process, the system comprising: a septic tank, comprising a first compartment, a second compartment, and a third compartment connected in sequence, the first compartment corresponding to a water inlet pipe and having a feces discharge outlet provided at the bottom, the third compartment corresponding to a water outlet; a dry-wet separation unit for performing dry-wet separation on the feces at the feces discharge outlet after intermittent suction, and allowing the feces liquid after dry-wet separation to flow back on-site to the second compartment; a fermentation processing unit for performing on-site fermentation on the feces after automatic suction and dry-wet separation, and automatically transferring the fermented feces on-site, or directly returning the feces liquid generated during the fermentation period to the septic tank on-site. Through the three-compartment septic tank feces automatic dry-wet separation and fermentation system and process described in the present invention, the feces in the three-compartment septic tank can be automatically dry-wet separated and fermented on-site, so as to efficiently realize the clean utilization of feces resources and greatly reduce the feces treatment cost.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to a three-chamber septic tank septic tank automatic dry-wet separation and fermentation system and process for feces residue. Background Art

[0002] Currently, with the rapid development of new rural construction, rural sewage treatment issues are becoming increasingly prominent. Two- or three-chamber septic tanks, a common sewage treatment facility in rural areas, are becoming increasingly widespread. Due to the large number of users, fecal residue in septic tanks must be frequently extracted by suction trucks for further fermentation treatment. However, since the extraction process cannot be controlled, suction trucks often extract fecal residue along with liquid feces, which increases both the amount of fecal residue to be transported and the burden of fermentation treatment. Furthermore, due to poor management, septic tanks can become compacted, clogged, overflowed, and have poor water quality, further polluting the rural environment.

[0003] In existing technologies, after the manure is extracted from septic tanks, it is either composted and fermented outdoors nearby or sent to a treatment plant for centralized fermentation. The former can cause manure liquid to flow freely and infest insects and flies; the latter, on the other hand, requires a series of processes, including dry-wet manure separation, manure liquid sedimentation, manure liquid treatment, and manure fermentation. This leads to high transportation costs, construction costs, and operational costs for the fermentation process. Summary of the Invention

[0004] In view of this, the technical problem to be solved by the present invention is: the first aspect is to provide a three-chamber septic tank feces automatic dry-wet separation and fermentation system, so that the feces in the three-chamber septic tank can be automatically separated into dry and wet and fermented on site, so as to efficiently realize the clean utilization of feces resources and greatly reduce the feces treatment cost.

[0005] In order to solve the above-mentioned technical problem in the first aspect, the present invention provides a three-chamber septic tank waste automatic dry-wet separation and fermentation system, comprising:

[0006] A septic tank comprising a first compartment, a second compartment, and a third compartment connected in sequence, wherein the first compartment corresponds to the water inlet pipe and has a feces discharge outlet at the bottom, and the third compartment corresponds to the water outlet pipe;

[0007] a dry-wet separation unit for separating the feces from the feces discharge outlet into dry and wet state after intermittent suction, and allowing the feces liquid after dry-wet separation to flow back to the second compartment on site;

[0008] The fermentation processing unit is used to automatically suck in the feces after dry and wet separation and ferment them on site, and automatically transfer the fermented feces on site, or directly return the fecal liquid generated during the fermentation period to the septic tank on site.

[0009] Preferably, the dry-wet separation unit includes a manure residue dry-wet separation pipe and a manure liquid conveying pipe. The manure residue dry-wet separation pipe is formed by connecting an X-direction horizontal section, a Y-direction horizontal section, and a Z-direction vertical section in sequence. The X-direction horizontal section is led out from the manure residue discharge outlet, and the top of the Z-direction vertical section is normally closed and the middle part is connected to the second compartment through the horizontally arranged manure liquid conveying pipe.

[0010] Preferably, a second water hole is provided between the second cell and the third cell, and a first water hole is provided between the first cell and the second cell at the effective volume liquid level of the first cell;

[0011] Taking the bottom of the septic tank as a reference, the height of the first water hole is H1, the height of the second water hole is H2, the height of the outlet pipe is H3, and the height of the manure liquid conveying pipe is H4, then H1>H4>H3>H2.

[0012] Preferably, a first solenoid valve is provided on the X-direction horizontal section, a second solenoid valve is provided on the manure liquid conveying pipe, and the fermentation processing unit includes a manure suction pipe connected to the Y-direction horizontal section, and a fourth solenoid valve and a manure suction pump are provided on the manure suction pipe.

[0013] Preferably, a filter screen is provided at the junction of the manure liquid conveying pipe and the Z-direction vertical section, and a third solenoid valve for backwashing the filter screen is provided on the water outlet pipe.

[0014] Preferably, the fermentation processing unit further includes a fermentation manure storage tank connected to the manure suction pipe. After the manure residue after dry and wet treatment is automatically sucked into the fermentation manure storage tank by the manure suction pump, the fermentation bacteria box is also connected to the fermentation manure storage tank through a dosing pump.

[0015] Preferably, the fermentation manure storage tank is divided into a fermentation grid, a manure storage grid, and a drainage grid by an inclined plate and a retractable partition. The drainage grid is located below the inclined plate, and the fermentation grid and the manure storage grid are connected or isolated by the retractable partition above. The inclined plate is hollowed out only at the position corresponding to the fermentation grid.

[0016] The technical problem to be solved by the present invention is also: in the second aspect, a three-chamber septic tank feces residue automatic dry-wet separation and fermentation process is proposed, so that the feces residue in the three-chamber septic tank can be automatically separated into dry and wet and fermented on site, so as to efficiently realize the clean utilization of feces residue resources and greatly reduce the feces residue treatment cost.

[0017] To solve the technical problem in the second aspect, the present invention proposes a three-chamber septic tank waste automatic dry-wet separation fermentation process, using the three-chamber septic tank waste automatic dry-wet separation fermentation system described in any embodiment of the first aspect, the process comprising the following steps:

[0018] S1: suck part of the manure residue and liquid manure from the bottom of the first compartment into the dry-wet separation unit;

[0019] S2: After dry-wet separation, the manure liquid flows back to the second compartment on site, and the manure residue continues to settle in the dry-wet separation unit;

[0020] S3: The feces residue in the dry-wet separation unit is sucked into the fermentation treatment unit for on-site fermentation;

[0021] S4: Transfer the fermented feces to local storage;

[0022] S5: Execute steps S1-S4 in a loop.

[0023] Preferably, step S1 includes the following specific operating steps:

[0024] S11: When the liquid level in the first cell reaches the effective volume liquid level, the first solenoid valve is opened;

[0025] S12: When the liquid level in the Z-direction vertical section rises to be level with the liquid level in the first cell, the first solenoid valve is closed;

[0026] At the same time, step S2 includes the following specific operating steps:

[0027] S21: After a first preset time T1, the second solenoid valve is opened;

[0028] S22: When the liquid level in the Z-direction vertical section drops to a level lower than the height H4 of the manure liquid conveying pipe, the second solenoid valve is closed.

[0029] Preferably, step S3 includes the following specific operating steps:

[0030] S31: Open the fourth solenoid valve;

[0031] S32: The feces in the dry-wet separation unit are sucked into the fermentation grid by a feces suction pump;

[0032] S33: adding a matching amount of fermentation agent into the fermentation cell through a dosing pump;

[0033] S34: After the feces residue in the dry-wet separation unit is completely sucked into the fermentation grid, the fourth solenoid valve is closed;

[0034] S35: The feces and fermentation agent are fully contacted in the fermentation cell and fermented on site;

[0035] S36: After the second preset time T2, the on-site fermentation ends.

[0036] Compared with the prior art, the three-chamber septic tank automatic dry-wet separation and fermentation system and process of feces residue described in the present invention has the following beneficial effects:

[0037] 1) The three-chamber septic tank can automatically separate the dry and wet waste and ferment it on site, so as to achieve efficient and clean utilization of waste resources and significantly reduce waste treatment costs. For example, it saves on the construction and operation of waste sedimentation tanks, waste treatment tanks, and waste overflow tanks, and also significantly reduces the transportation cost of waste.

[0038] 2) The dry-wet separation and fermentation system can be unattended throughout the entire process, automatically performing dry-wet separation, fermentation, backwashing, automatic heat preservation and automatic storage, reducing the probability of septic tank blockage and overflow, and effectively improving the quality of the rural environment;

[0039] 3) Install a photovoltaic power storage device in the open space above the septic tank, and all electrical equipment will be powered by solar energy, effectively utilizing open space resources and natural energy, saving operating costs and achieving energy conservation and emission reduction;

[0040] 4) The installation of a dry-wet separation pipe for manure residue can effectively reduce the power and operating frequency of the manure suction pump, while also reducing the volume of the fermentation grid in the fermentation tank, thereby reducing the number of electric heating cables used and saving energy, such as reducing the installation area of ​​solar photovoltaic panels. At the same time, it has a certain degree of homogenization effect on the manure residue, which facilitates subsequent fermentation processing.

[0041] 5) During a complete feces fermentation cycle, the feces suction pump and the dosing pump can be started multiple times to ensure that the feces and the fermentation agent are fully in contact, which facilitates fermentation, saves stirring equipment, and reduces processing costs;

[0042] 6) The manure liquid conveying pipe can backwash the filter in the manure residue dry and wet separation pipe to prevent the filter from being blocked and save management and operation costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The accompanying drawings, which constitute part of the present invention, are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0044] Figure 1 This is a schematic cross-sectional view of a three-chamber septic tank automatic dry-wet separation and fermentation system for feces (excluding the fermentation processing unit) described in Example 1 of the present invention;

[0045] Figure 2 Schematic diagram of the system architecture of a three-chamber septic tank automatic dry-wet separation and fermentation system for feces residue described in Example 1 of the present invention;

[0046] Figure 3 for Figure 2 It includes a partially enlarged structural diagram of the fermentation and storage tank;

[0047] Figure 4This is a schematic flow chart of a three-chamber septic tank automatic dry-wet separation and fermentation process for fecal residue described in Example 2 of the present invention.

[0048] Description of reference numerals:

[0049] 1- septic tank, 101- first cell, 102- second cell, 103- third cell, 2- water inlet pipe, 3- effective volume liquid level, 401- first water hole, 402- second water hole, 501- first contactless liquid level gauge, 502- second contactless liquid level gauge, 503- third contactless liquid level gauge, 6- vent pipe, 7- water outlet pipe, 8- ground line, 9- feces discharge outlet, 10- feces dry-wet separation pipe, 1001- X-axis horizontal section, 1002- Y-axis horizontal section, 1003- Z-axis vertical section, 11- Manure liquid conveying pipe, 121-first solenoid valve, 122-second solenoid valve, 123-third solenoid valve, 124-fourth solenoid valve, 13-filter, 14-fermentation manure storage tank, 141-fermentation grid, 142-manure storage grid, 143-drainage grid, 144-inclined plate, 145-openable partition, 15-manure suction pipe, 16-drainage pipe, 17-temperature sensor, 18-thermostat, 19-photovoltaic power storage device, 20-electric heating tape, 21-fermentation agent box, 22-dosing pump, 221-agent nozzle, 23-manure suction pump. DETAILED DESCRIPTION

[0050] To make the above-mentioned objectives, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments of the present invention described herein only constitute part of the embodiments of the present invention, which are only used to explain the present invention and do not constitute a limitation of the present invention. In the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0051] Example 1

[0052] See also Figure 1-3 As shown, the present invention provides a septic tank sludge automatic dry-wet separation fermentation system, comprising:

[0053] The septic tank 1 comprises at least a first compartment 101 and a second compartment 102, wherein the first compartment 101 corresponds to the water inlet pipe 2 and has a feces discharge outlet 9 at the bottom;

[0054] A dry-wet separation unit is used to intermittently suck the feces at the feces discharge port 9 into a dry-wet separation state, and to allow the feces liquid after dry-wet separation to flow back to the second compartment 102 on the spot;

[0055] The fermentation processing unit is used to automatically suck in the feces after dry-wet separation and ferment them on site, and automatically transfer the fermented feces on site, or directly return the fecal liquid generated during the fermentation period to the septic tank 1 on site.

[0056] Specifically, during the operation of the septic tank 1, due to the continuous flow of the water inlet pipe 2, a large amount of feces will be continuously collected at the bottom of the first compartment 101. Taking a 100-cubic-meter standardized three-compartment septic tank as an example, it can meet the use of a village of 1,000 people within a cleaning cycle every three months. In the present invention, if the feces fermentation cycle is calculated as 7 to 10 days, then corresponding to the cleaning cycle of the septic tank 1, for example, once every three months, the dry-wet separation unit can basically be started once every 10 days to perform a reciprocating cycle of the feces continuously collected at the feces discharge outlet 9 in batches, and then the automatic dry-wet separation and fermentation system performs on-site dry-wet separation, fermentation treatment, and transfer for each batch of feces after suction. The entire process can be repeated and can be unmanned throughout the process, thereby avoiding the septic tank 1 from being compacted, blocked, overflowed, and having poor water quality due to neglect of management.

[0057] Therefore, through the automatic dry-wet separation and fermentation system for septic tank feces described in the present invention, the feces in the septic tank can be automatically separated into dry and wet parts and fermented on site, so as to efficiently realize the clean utilization of feces resources and greatly reduce the cost of feces treatment.

[0058] Preferably, the outlet pipe 7 is arranged corresponding to the third chamber 103 of the septic tank 1, and a second water hole 402 is opened between the third chamber 103 and the second chamber 102; at the effective volume liquid level 3 of the first chamber 101, a first water hole 401 is opened between the first chamber 101 and the second chamber 102.

[0059] Specifically, in the present invention, the septic tank 1 can actually be a two-compartment septic tank or a three-compartment septic tank, and each compartment will be covered with an inspection cover at the ground line 8. At the same time, the first compartment 101 will also be provided with a ventilation pipe 6 extending out of the ground line 8.

[0060] Specifically, in a three-compartment septic tank, first compartment 101 primarily serves to precipitate insect eggs, intercept fecal residue, and ferment. Second compartment 102 further ferments liquid feces, and third compartment 103 primarily stores fermented liquid feces. In a two-compartment septic tank, first compartment 101 functions similarly, but second compartment 102 directly continues fermentation and stores liquid feces. In this case, outlet pipe 7 in septic tank 1 replaces second water hole 402 and directly corresponds to second compartment 102.

[0061] Preferably, the dry-wet separation unit includes a manure dry-wet separation pipe 10 and a manure liquid conveying pipe 11. The manure dry-wet separation pipe 10 is composed of an X-direction horizontal section 1001, a Y-direction horizontal section 1002, and a Z-direction vertical section 1003 connected in sequence. The X-direction horizontal section 1001 is led out from the manure discharge outlet 9, and the top of the Z-direction vertical section 1003 is normally closed and the middle is connected to the second compartment 102 through the horizontally arranged manure liquid conveying pipe 11.

[0062] Specifically, because the water flow has a certain horizontal velocity, under the dual effects of the horizontal velocity and gravity, the feces in the septic tank 1 mainly continue to accumulate at the bottom of the first cell 101 near the second cell 102. Therefore, the X-axis horizontal section 1001 can be led out from the feces discharge port 9 at this position to make it easier to intercept the feces. In the feces dry-wet separation pipe 10, the Y-axis horizontal section 1002 and the Z-axis vertical section 1003 are both arranged parallel to the septic tank 1. Among them, the Z-axis vertical section 1003 is vertically extended to the ground line 8 and is also covered with an inspection cover to facilitate maintenance from the ground.

[0063] Furthermore, since the manure liquid conveying pipe 11 and the Z-direction vertical section 1003 are arranged in a T shape, the manure residue with manure liquid will be intermittently sucked through the manure residue dry-wet separation pipe 10 and then continued to be statically settled for a certain period of time. The manure liquid in the upper layer will be able to flow back to the second compartment 102 along the manure liquid conveying pipe 11 on-site, thereby achieving a significant reduction in the volume of the manure residue after concentration, so as to reduce the burden of automatic suction and on-site fermentation of the manure residue in the fermentation treatment unit. At the same time, the manure residue after dry-wet separation will be homogenized to a certain extent, which is more convenient for subsequent fermentation treatment. Among them, the laying length of the Y-direction horizontal section 1002, that is, the position of the Z-direction vertical section 1003, can correspond to the middle of the second cell 102, so that the separated feces can flow smoothly back to the second cell 102 for further fermentation; at the same time, the diameter of the feces dry-wet separation pipe 10 can be flexibly controlled according to factors such as the feces fermentation time, the size of the septic tank, and the cleaning cycle. For example, for a 100-cubic-meter standardized three-chamber septic tank, the feces fermentation cycle is calculated as 10 days, and the cleaning cycle is calculated as three months. After calculation, the diameter of the feces dry-wet separation pipe 10 required to complete the cyclic fermentation can be between the conventional pipe diameters of 1.1 and 1.2 meters, which is also convenient for construction. Furthermore, the diameter of the feces liquid conveying pipe 11 can be smaller than the Z-direction vertical section 1003.

[0064] Preferably, taking the bottom of the septic tank 1 as a reference, the height of the first water hole 401 is H1, the height of the outlet pipe 7 is H3, and the height of the manure liquid conveying pipe 11 is H4, then H1>H4>H3.

[0065] Specifically, for the three-compartment septic tank of the present invention, if the height of the second water hole 402 is H2, then H1>H4>H3>H2; and for the two-compartment septic tank of the present invention, since H2 does not exist or is equivalent to H3, only H1>H4>H3 exists. The purpose of the above-mentioned setting is, firstly, to enable the second compartment 102 to maintain a relatively low liquid level for a long time under normal conditions, so as to ensure that the fecal liquid after dry-wet separation can smoothly flow back to the second compartment 102 through the fecal liquid conveying pipe 11; secondly, by changing the height of the outlet pipe 7 and the water holes between each compartment, the water flow of the septic tank 1 forms a folded plate-like up and down tumbling, which is easy to float up the fecal residue at the bottom of the tank, and increase the contact area between the fecal residue and the fecal liquid, thereby improving the volume utilization rate of the septic tank 1 and reducing the occurrence of hydraulic short-circuiting and water surface hardening.

[0066] Preferably, the water inlet pipe 2 and the water outlet pipe 7 both adopt a submerged outflow with a downward bend.

[0067] Specifically, the present invention changes the horizontal flow of water inlet and outlet to a downward curved submerged outflow. In this case, H3 is the normal distance from the bottom of the outlet horizontal pipe to the bottom of the pool. Similarly, to maintain consistency in height comparison, H1, H2, and H4 are also the normal distances from the bottom of the hole or pipe to the bottom of the pool. For details, please refer to Figure 1 Furthermore, taking the water inlet pipe 2 as an example, since the inlet water flows to a certain depth below the water surface, the organic matter and microorganisms at the bottom of the first cell 101 will be resuspended in the pool due to the impact of the water flow, increasing the contact area and improving the efficiency and rate of microbial reaction. In addition, the circulation formed in the pool can stir the upper layer of floating skin and reduce the occurrence of compaction.

[0068] Preferably, a filter screen 13 is provided at the junction of the manure liquid conveying pipe 11 and the Z-direction vertical section 1003 .

[0069] Specifically, the filter 13 can intercept fine fecal residue in the upper layer of fecal liquid to prevent it from entering and being deposited in the second compartment 102 along with the fecal liquid. The filter 13 can be made of plastic or stainless steel.

[0070] Preferably, a first solenoid valve 121 is provided on the X-direction horizontal section 1001, a second solenoid valve 122 is provided on the manure liquid conveying pipe 11, and the fermentation processing unit includes a feces suction pipe 15 connected to the Y-direction horizontal section 1002, and a fourth solenoid valve 124 and a feces suction pump 23 are provided on the feces suction pipe 15.

[0071] Specifically, through the fully automated intermittent opening and closing control of the first solenoid valve 121, the second solenoid valve 122, the fourth solenoid valve 124, and the feces suction pump 23, the feces continuously collected at the feces discharge outlet 9 will be sucked in batches together with the feces liquid through the first solenoid valve 121 in a reciprocating cycle, and enter the feces dry-wet separation pipe 10 until the dry-wet separation is completed in the feces dry-wet separation pipe 10. The feces liquid in the upper layer can flow back to the second compartment 102 through the second solenoid valve 122, while the feces in the lower layer can be automatically sucked into the fermentation treatment unit by the feces suction pump 23 through the fourth solenoid valve 124.

[0072] Preferably, a third solenoid valve 123 for backwashing the filter 13 is provided on the water outlet pipe 7 .

[0073] Specifically, the backflow of liquid feces or the static settling of feces residue during the dry-wet separation process can easily clog the filter 13. The outlet pipe 7 is normally open, but when the filter 13 needs to be backwashed, the third solenoid valve 123 can be closed to increase the liquid level in the second cell 102 and allow the liquid to flow back through the second solenoid valve 122 into the Z-direction vertical section 1003 to complete the backwash of the filter 13, thereby preventing the filter 13 from clogging.

[0074] Preferably, the first compartment 101 is correspondingly provided with a first non-contact liquid level gauge 501 , the second compartment 102 is correspondingly provided with a second non-contact liquid level gauge 502 , and the Z-direction vertical section 1003 is correspondingly provided with a third non-contact liquid level gauge 503 .

[0075] Specifically, the liquid level changes in each cell and the Z-direction vertical section 1003 are closely related to the full-process automated control of the automatic dry-wet separation fermentation system. However, since the septic tank 1 and the dry-wet separation pipe 10 for feces are buried below the ground line 8, and the feces liquid is corrosive to a certain extent, the present invention adopts a contactless liquid level meter. At the same time, given that the second cell 102 can maintain a low liquid level for a long time under normal conditions, the present invention can increase the service life of the liquid level meter to reduce replacement costs and facilitate maintenance.

[0076] As one of the preferred examples of the present invention, the first non-contact liquid level meter 501 and the second non-contact liquid level meter 502 are both ultrasonic type and are both arranged on the top wall of the corresponding cell, and the third non-contact liquid level meter 503 is capacitive type and is arranged on the upper end of the outer wall of the Z-direction vertical section 1003.

[0077] Specifically, as the liquid level in the corresponding cell changes, the time difference between the emission and reception of the sound wave changes, and this time difference signal can be converted into a liquid level change signal. Similarly, as the liquid level in the Z-axis vertical section 1003 changes, the capacitance sensed by the capacitive non-contact liquid level meter also changes accordingly, and the change in this capacitance sensed can be converted into a liquid level change signal.

[0078] Preferably, the fermentation processing unit also includes a fermentation manure storage tank 14 connected to the manure suction pipe 15. After the manure residue after dry and wet treatment is automatically sucked into the fermentation manure storage tank 14 by the manure suction pump 23, the fermentation bacteria box 21 is also connected to the fermentation manure storage tank 14 through the dosing pump 22.

[0079] Specifically, the fermentation manure storage tank 14 will be set near the ground line 8 to facilitate the on-site transfer and ready use of the fermented manure residue. The overall length of the manure suction pipe 15 is limited and it will extend from the ground line 8 to automatically suck the manure residue in the manure dry-wet separation pipe 10 into the fermentation manure storage tank 14 for on-site fermentation. Therefore, the end of the manure suction pipe 15 close to the Y-axis horizontal section 1002 can be provided with a fourth solenoid valve 124, and the end close to the fermentation manure storage tank 14 can be provided with a manure suction pump 23. As for the liquid fermentation agent and the fermentation agent box 21 located above the ground line 8, it only needs to be connected to the fermentation manure storage tank 14 through the dosing pump 22. In this way, on-site fermentation of manure residue is achieved in the fermentation manure storage tank 14.

[0080] Preferably, the fermentation manure storage tank 14 is divided into a fermentation grid 141, a manure storage grid 142, and a drainage grid 143 by an inclined plate 144 and an openable and closable partition 145. The drainage grid 143 is located below the inclined plate 144, and the fermentation grid 141 is connected to or isolated from the manure storage grid 142 by the openable and closable partition 145 above. The inclined plate 144 is hollowed out only at the position corresponding to the fermentation grid 141.

[0081] Specifically, in the present invention, inclined plate 144 is a stainless steel plate or a polished hard ceramic plate with a certain inclination angle. When the retractable partition 145 is in the open state, the solid feces in the fermentation compartment 141 can slide smoothly along the inclined plate 144 into the feces storage compartment 142 for on-site storage. During the fermentation period of approximately 7 to 10 days in the fermentation compartment 141, the generated feces can be drained into the drain compartment 143 through the inclined plate 144 and then directly returned to the septic tank 1.

[0082] Preferably, a drain pipe 16 is provided below the drain grid 143 for shallow burial below the ground line 8 , and the other end of the drain pipe 16 is communicated with the first cell 101 .

[0083] Specifically, the manure liquid produced during the fermentation period can flow directly back to the first cell 101 on site, so that part of the fecal residue contained in the leached manure liquid can be re-settled and enter the manure residue dry-wet separation pipe 10, so that it can be fermented and utilized again. In particular, during the fermentation period, the timely leaching of the manure liquid can further concentrate the manure residue, thereby improving the manure residue fermentation efficiency.

[0084] Preferably, the openable and closable partition 145 is a lightweight partition, and its upper end is rotated and fixed on the boundary between the fermentation grid 141 and the manure storage grid 142, and its lower end is provided with an electromagnetic sheet for adsorbing or disconnecting with the inclined plate 144.

[0085] Specifically, an electromagnetic plate will also be provided under the inclined plate 144, so that when the power is on, the openable and closable partition 145 can be firmly adsorbed with the inclined plate 144 to form a tightly closed state, thereby isolating the fermentation grid 141 from the manure storage grid 142; on the contrary, when the power is off, the fermentation grid 141 and the manure storage grid 142 can be connected by disconnecting the openable and closable partition 145 from the inclined plate 144. At this time, the manure residue in the fermentation grid 141 can automatically flow down along the inclined plate 144, so as to easily push open the openable and closable partition 145, thereby ensuring that all the manure residue can enter the manure storage grid 142.

[0086] Preferably, the inner layer of the fermentation grid 141 is a stainless steel layer, the outer layer is a heat-insulating structure layer, and an electric heating tape 20 is sandwiched in the middle.

[0087] Specifically, under certain temperature conditions, the fermentation of feces can proceed smoothly and ensure that the fermentation cycle is stable and controllable. The heating effect of the electric heating tape 20 and the heat transfer effect of the stainless steel layer can maintain the fermentation grid 141 at a certain constant temperature.

[0088] Preferably, a temperature sensor 17 is installed in the fermentation grid 141 , and the temperature sensor 17 and the electric heating tape 20 are electrically connected to the photovoltaic power storage device 19 through a temperature controller 18 .

[0089] Specifically, the temperature sensor 17 can monitor the temperature inside the fermentation grid 141 in real time, and then the temperature controller 18 can control the photovoltaic power storage device 19 to discharge the electric heating tape 20 according to the monitored temperature, so that the temperature inside the fermentation grid 141 is controlled within a certain constant temperature range, which is conducive to the fermentation of feces and facilitates the control of the fermentation cycle.

[0090] Of course, it should be noted that, given that solar photovoltaic power storage technology is now relatively mature, the idle space above the septic tank 1 can be used to lay solar photovoltaic panels, thereby rationally utilizing open space resources and natural energy. Furthermore, given that most of the power-consuming devices of the present invention are only started a few times in a certain period of time in a cycle, and the power is relatively small, in the present invention, all power can come from the photovoltaic power storage device 19, such as but not limited to the electromagnetic sheet, the feces suction pump 23, the dosing pump 22, and any one of the electromagnetic valves.

[0091] Preferably, the feces suction pump 23 is a self-priming pump, and / or the dosing pump 22 is a metering pump.

[0092] Specifically, for each fermentation operation of the fermentation cell 141, the amount of fermentation agent added must match the fermentation volume of each batch, or more precisely, the amount of feces automatically aspirated in each batch, so that the feces in the fermentation cell 141 can be fully and effectively fermented before the retractable partition 145 is opened, and the agent is not wasted. Given that the dryness and wetness of the feces after each dry-wet separation are not much different, when the feces suction pump 23 is a self-priming pump, it is beneficial to control the quantitative control during each batch aspiration; and when the dosing pump 22 is a metering pump, the fermentation agent addition will also have an automatic metering function, which is conducive to the automatic and precise addition of the fermentation agent and its related automated debugging.

[0093] Preferably, the dosing pump 22 includes a drug spray head 221 extending into the fermentation cell 141 , and the drug spray head 221 can evenly spray the fermentation agent on the surface of the feces residue in the fermentation cell 141 .

[0094] Specifically, the droplets ejected by the agent nozzle 221 are small and can rotate freely, ensuring uniform application of the fermentation agent to the surface of the feces. Furthermore, within a fermentation cycle, the fermentation grid 141 can automatically absorb the feces in multiple batches to ensure more complete contact between the fermentation agent and the feces without requiring a stirring device. Accordingly, the feces suction pump 23 and the agent dosing pump 22 can also be activated multiple times.

[0095] Example 2

[0096] See also Figure 4 As shown, the present invention also proposes a septic tank feces automatic dry-wet separation fermentation process, using the septic tank feces automatic dry-wet separation fermentation system as described in Example 1, the process includes the following steps:

[0097] S1: sucking part of the feces residue and liquid feces from the bottom of the first cell 101 into the dry-wet separation unit;

[0098] S2: After the wet-dry separation, the manure liquid flows back to the second compartment 102, and the manure residue continues to settle in the wet-dry separation unit;

[0099] S3: The feces residue in the dry-wet separation unit is sucked into the fermentation treatment unit for on-site fermentation;

[0100] S4: Transfer the fermented feces to local storage;

[0101] S5: Execute steps S1-S4 in a loop.

[0102] Specifically, it can be understood by those skilled in the art that the automatic dry-wet separation and fermentation process for septic tank feces proposed in Example 2, when using the automatic dry-wet separation and fermentation system for septic tank feces as described in Example 1, can solve the corresponding technical problems and obtain the technical effects thereof, as described in Example 1. In step S4, the feces after on-site transfer can be used at any time; and in step S5, in order to further improve the automatic dry-wet separation and fermentation efficiency of the feces, step S1 can also be started at a selected time during the on-site fermentation of step S3 as appropriate.

[0103] Of course, to facilitate further understanding by those skilled in the art, some steps in S1-S5 are further elaborated below.

[0104] Preferably, step S1 includes the following specific operating steps:

[0105] S11: When the liquid level in the first cell 101 reaches the effective volume liquid level 3, the first solenoid valve 121 is opened;

[0106] S12 : When the liquid level in the Z-direction vertical section 1003 rises to be level with the liquid level in the first cell 101 , the first solenoid valve 121 is closed.

[0107] Specifically, whether it is the first commissioning of the septic tank 1 (including the first commissioning after overhaul) or normal operation, the pre-opening condition of the first solenoid valve 121 can ensure that a certain amount of fecal residue has been continuously collected at the bottom of the first cell 101. Especially under the normal operation of the septic tank 1, the liquid level of the first cell 101 can quickly reach the effective volume liquid level 3, so there is basically no time interval between the entry of the next cycle of step S1 and the step S4 of the previous cycle, that is, it mainly depends on the completion time of the previous step S4. However, in some settings or under some extreme conditions, even if step S3 is still in the in-situ fermentation period of the previous cycle, the first solenoid valve 121 can be directly opened or opened at a selected time after the liquid level condition is met, so that step S1 can directly enter or enter the next cycle at a selected time.

[0108] Preferably, step S2 includes the following specific operating steps:

[0109] S21: After a first preset time period T1, the second solenoid valve 122 is opened;

[0110] S22: When the liquid level in the Z-direction vertical section 1003 drops to a height H4 lower than the manure liquid conveying pipe 11, the second solenoid valve 122 is closed.

[0111] Specifically, in step S21, T1≥12h to meet the minimum quality assurance of dry-wet separation; and in step S22, even below the H4 liquid level, there is still a certain amount of feces liquid mixed in the feces residue, which does not affect the purpose of automatic dry-wet separation fermentation of the present invention.

[0112] Preferably, as a first preferred embodiment of the present invention, step S3 includes the following specific operating steps:

[0113] S31: Open the fourth solenoid valve 124;

[0114] S32: The feces in the dry-wet separation unit are sucked into the fermentation grid 141 by the feces suction pump 23;

[0115] S33: Adding a matching amount of fermentation bacteria into the fermentation cell 141 via the dosing pump 22;

[0116] S34: After the feces residue in the dry-wet separation unit is completely sucked into the fermentation grid 141, the fourth solenoid valve 124 is closed;

[0117] S35: The feces and fermentation agent are fully contacted in the fermentation cell 141 and fermented on site;

[0118] S36: After the second preset time T2, the on-site fermentation ends.

[0119] Specifically, in step S32, the feces in the dry-wet separation unit can be sucked into the fermentation grid 141 all at once or in batches, and then steps S32-S33 can be executed in a cycle, or can be performed sequentially or synchronously. The former can correspond to the multiple intermittent starts and stops of the feces suction pump 23 and the dosing pump 22, so that the feces and the fermentation bacteria are fully contacted in batches and the stirring step is omitted. In step S36, the second preset time T2 is generally 7 to 10 days, and the feces produced during the corresponding fermentation cycle can be directly returned to the septic tank 1 on site.

[0120] Preferably, as a second preferred embodiment of the present invention, step S3 includes the following specific operating steps:

[0121] S31: Open the fourth solenoid valve 124;

[0122] S32': sucking all the feces in the dry-wet separation unit into the fermentation grid 141 at once by the feces suction pump 23;

[0123] S33': draining the feces in the fermentation cell 141 at a high temperature for a fifth preset time T5 through the electric heating cable 20, so that the feces reaches a preset standard concentration;

[0124] S34': According to the height of the feces residue, a matching amount of fermentation agent is added into the fermentation cell 141 via the dosing pump 22;

[0125] S35: The feces and fermentation agent are fully contacted in the fermentation cell 141 and fermented on site;

[0126] S36: After the second preset time T2, the on-site fermentation ends.

[0127] Specifically, compared to the first preferred embodiment, in the second preferred embodiment, step S32' only supports the one-time full suction of feces, and through the high-temperature drainage of step S33', the feces reaches the preset standard concentration in the fermentation grid 141. Among them, the fifth preset time length T5 is set to 12h, so that the feces can reach the preset standard concentration without any drainage in the high-temperature drainage environment without fermentation bacteria. In step S34', the addition of a matching amount of fermentation bacteria can be determined according to the slag height of the feces at the preset standard concentration, so that the addition of the fermentation bacteria is more accurate; but in the subsequent step S35, it can still use the stirring device to make the feces fully contact with the fermentation bacteria, and under the subsequent addition of the fermentation bacteria, the feces can continue to drain a certain amount of water during the in-situ fermentation cycle corresponding to the second preset time length T2.

[0128] Preferably, in step S35, the in situ fermentation includes the following specific operating steps:

[0129] S351: Monitor and determine whether the temperature in the fermentation compartment 141 is lower than the minimum threshold of the bacterial fermentation temperature;

[0130] S352: If yes, the electric heating cable 20 starts heating; if no, return to step S351;

[0131] S353: Monitor and determine whether the temperature in the fermentation compartment 141 is higher than the maximum threshold of the bacterial fermentation temperature;

[0132] S354: If yes, the electric heating tape 20 stops heating and returns to step S351; if not, returns to step S353.

[0133] Specifically, step S35 corresponds to a complete fermentation cycle of the second preset time length T2. During this fermentation cycle, different fermentation bacteria have different requirements for the fluctuation range of the fermentation temperature of the bacteria. Therefore, the minimum threshold and the maximum threshold of the fermentation temperature of the bacteria can be flexibly set as needed to facilitate the fermentation of feces and facilitate the control of the fermentation cycle.

[0134] Preferably, during the fermentation cycle corresponding to the second preset time T2, step S35 further includes the following backwashing step for the filter screen 13:

[0135] S351': close the third solenoid valve 123;

[0136] S352': when the liquid level in the second cell 102 rises to a height H4 higher than the manure liquid conveying pipe 11, the second solenoid valve 122 is opened;

[0137] S353': backwashing the filter screen 13 by backflowing the fecal liquid in the second cell 102 into the Z-direction vertical section 1003;

[0138] S354 ′: after the third preset time period T3, the second electromagnetic valve 122 is closed and the third electromagnetic valve 123 is opened.

[0139] Specifically, the third solenoid valve 123 is normally open in the outlet pipe 7, and in step S35 in which the fourth solenoid valve 124 has been closed in advance, steps S351'-S354' and steps S351-S354 can be performed simultaneously to achieve backwashing of the filter 13. After backwashing for the third preset time T3, the second solenoid valve 122 and the third solenoid valve 123 still need to be restored to the state before backwashing so that the liquid level in the second cell 102 drops back to normal. The third preset time T3 is very short, so even if a small amount of feces liquid is vortexed in the feces dry-wet separation pipe 10, it will flow downward into the X-direction horizontal section 1001 and the Y-direction horizontal section 1002 and directly participate in the dry-wet separation of the next cycle, which does not affect the purpose of automatic dry-wet separation fermentation of the present invention.

[0140] Preferably, step S4 includes the following specific operating steps:

[0141] S41: Open the retractable partition 145;

[0142] S42: After the fourth preset time T4, all the fermented feces flow through the inclined plate 144 into the feces storage grid 142 for on-site storage;

[0143] S43: Close the openable and closable partition 145.

[0144] Specifically, the fourth preset time length T4 is very short, and it is only necessary to allow all the fermented feces to flow into the feces storage grid 142 through the inclined plate 144, thereby completing the on-site transfer of the fermented feces.

[0145] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the scope defined by the claims.

Claims

1. A three-chamber septic tank waste automatic dry-wet separation fermentation system, characterized in that: include: A septic tank (1) comprises a first cell (101), a second cell (102), and a third cell (103) which are connected in sequence, wherein the first cell (101) corresponds to a water inlet pipe (2) and is provided with a feces discharge outlet (9) at the bottom, and the third cell (103) corresponds to a water outlet pipe (7); a dry-wet separation unit for performing dry-wet separation on the feces at the feces discharge port (9) after intermittent suction, and for allowing the feces liquid after dry-wet separation to flow back to the second compartment (102) on site; The fermentation processing unit is used to automatically absorb the feces after dry and wet separation and ferment them on site, and automatically transfer the fermented feces to the site; The dry-wet separation unit comprises a dung residue dry-wet separation pipe (10) and a dung liquid conveying pipe (11), wherein the dung residue dry-wet separation pipe (10) is formed by sequentially connecting an X-direction horizontal section (1001), a Y-direction horizontal section (1002), and a Z-direction vertical section (1003), wherein the X-direction horizontal section (1001) is led out from the dung residue discharge port (9), and the top end of the Z-direction vertical section (1003) is normally closed and the middle portion is connected to the second compartment (102) through the horizontally arranged dung liquid conveying pipe (11); A second water passage (402) is provided between the second cell (102) and the third cell (103), and a first water passage (401) is provided between the first cell (101) and the second cell (102) at the effective volume liquid level (3) of the first cell (101); Taking the bottom of the septic tank (1) as a reference, the height of the first water hole (401) is H1, the height of the second water hole (402) is H2, the height of the outlet pipe (7) is H3, and the height of the manure liquid conveying pipe (11) is H4, then H1>H4>H3>H2; The X-direction horizontal section (1001) is provided with a first solenoid valve (121), the manure liquid conveying pipe (11) is provided with a second solenoid valve (122), the fermentation processing unit includes a manure suction pipe (15) connected to the Y-direction horizontal section (1002), and the manure suction pipe (15) is provided with a fourth solenoid valve (124) and a manure suction pump (23); The fermentation processing unit further includes a fermentation manure storage tank (14) connected to the manure suction pipe (15). After the manure residue after dry and wet processing is automatically sucked into the fermentation manure storage tank (14) by the manure suction pump (23), the fermentation bacteria box (21) is also connected to the fermentation manure storage tank (14) through the dosing pump (22); The fermentation manure storage tank (14) is divided into a fermentation grid (141), a manure storage grid (142), and a drainage grid (143) by an inclined plate (144) and an openable partition (145). The drainage grid (143) is located below the inclined plate (144), and the fermentation grid (141) and the manure storage grid (142) are connected or isolated from each other by the openable partition (145) above. The inclined plate (144) is hollowed out only at a position corresponding to the fermentation grid (141).

2. The three-chamber septic tank waste automatic dry-wet separation and fermentation system according to claim 1 is characterized in that: A filter screen (13) is provided at the junction of the manure liquid conveying pipe (11) and the Z-direction vertical section (1003), and a third solenoid valve (123) for backwashing the filter screen (13) is provided on the water outlet pipe (7).

3. A three-chamber septic tank septic tank automatic dry-wet separation fermentation process, characterized in that: Using the three-chamber septic tank waste automatic dry-wet separation fermentation system according to any one of claims 1-2, the process comprises the following steps: S1: sucking part of the feces residue at the bottom of the first compartment (101) together with the feces liquid into the dry-wet separation unit; S2: After the dry-wet separation, the manure liquid flows back to the second compartment (102) on site, and the manure residue continues to settle in the dry-wet separation unit; S3: The feces residue in the dry-wet separation unit is sucked into the fermentation treatment unit for on-site fermentation; S4: Transfer the fermented feces to local storage; S5: Execute steps S1-S4 in a loop.

4. The three-chamber septic tank automatic dry-wet separation and fermentation process for feces according to claim 3, characterized in that: Step S1 includes the following specific operating steps: S11: When the liquid level in the first cell (101) reaches the effective volume liquid level (3), the first solenoid valve (121) is opened; S12: When the liquid level in the Z-direction vertical section (1003) rises to the same level as the liquid level in the first cell (101), the first solenoid valve (121) is closed; At the same time, step S2 includes the following specific operating steps: S21: After a first preset time period T1, the second solenoid valve (122) is opened; S22: When the liquid level in the Z-direction vertical section (1003) drops to a height H4 lower than the manure liquid conveying pipe (11), the second solenoid valve (122) is closed.

5. A three-chamber septic tank automatic dry-wet separation fermentation process for feces according to claim 3 or 4, characterized in that: Step S3 includes the following specific operating steps: S31: Open the fourth solenoid valve (124); S32: The feces residue in the dry-wet separation unit is sucked into the fermentation grid (141) by the feces suction pump (23); S33: adding a matching amount of fermentation agent into the fermentation cell (141) via the dosing pump (22); S34: After all the feces residue in the dry-wet separation unit is sucked into the fermentation grid (141), the fourth solenoid valve (124) is closed; S35: The feces and fermentation agent are in full contact in the fermentation cell (141) and fermented in situ; S36: After the second preset time T2, the on-site fermentation ends.

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