A rural domestic sewage treatment residual sludge reduction and resource system

Abstract

The present application belongs to the technical field of sludge treatment, and specifically provides a sludge reduction and resource system for residual sludge of rural domestic sewage treatment, which comprises a drying bin and an aerobic fermentation bin. The top of the drying bin is made of light-transmitting material, and a sludge multi-layer drying bed and a blowing system are arranged in the bin body. Ventilation holes are arranged at the bottom of the side wall of the drying bin, and water vapor is carried away by solar energy and air flow to realize preliminary dewatering and volume reduction of the sludge. A composting tank is arranged in the bin body of the aerobic fermentation bin, and the dried sludge in the drying bin is transported into the composting tank. A medicament adding system adds medicaments in the composting tank for aerobic fermentation. An aeration system is arranged at the bottom of the composting tank, and a ventilation opening is arranged at the upper part of the aerobic fermentation bin. According to the future weather condition, the current treatment load and environmental temperature and humidity of the drying bin and the aerobic fermentation bin, and the temperature and humidity of the composting body, the system is intelligently controlled. The present application realizes harmless treatment and resource utilization of sludge, and forms a closed-loop management.

Description

Technical Field

[0001] This invention belongs to the field of sludge treatment technology, specifically, it relates to a system for reducing and recycling residual sludge from rural domestic sewage treatment. Background Technology

[0002] With the widespread adoption of rural domestic sewage treatment facilities, the disposal of the resulting residual sludge has become increasingly prominent. Rural residual sludge is characterized by its dispersed generation points, small individual production volume, relatively high organic matter content, and low content of toxic substances such as heavy metals. However, it also faces the following treatment challenges: Centralized treatment is uneconomical: transporting scattered sludge to centralized urban sludge treatment centers is costly and uneconomical. Poor technological adaptability: Traditional sludge treatment technologies (such as anaerobic digestion to produce biogas, mechanical dewatering, thermal drying, etc.) usually require complex equipment, high energy consumption and professional operation and maintenance, which are not suitable for promotion and application in rural areas; Secondary pollution risk: Simple natural drying requires a large area, has poor sanitation, easily produces odors, and leachate pollutes groundwater. Indiscriminate dumping or landfilling can cause serious damage to the rural ecological environment. Resources are not being used effectively: Sludge contains abundant nitrogen, phosphorus, potassium and organic matter, which is a potentially valuable resource, but there is currently a lack of low-cost resource utilization channels suitable for rural scenarios. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a system for reducing and recycling residual sludge from rural domestic sewage treatment, which can harmlessly treat the sludge and realize the recycling of sludge resources.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a system for reducing and recycling residual sludge from rural domestic sewage treatment, including a drying chamber and an aerobic fermentation chamber; The drying chamber contains a multi-layer sludge drying bed, with a sludge conveying pipe above each layer to transport the sludge to be treated to the multi-layer sludge drying bed. The drying chamber is equipped with a blower system, which includes blower pipes located above each layer of the multi-layer sludge drying bed. The blower pipes are connected to a first blower for blowing air. Ventilation holes are provided at the bottom of the side wall of the drying chamber. The roof of the drying chamber is a sloping roof made of translucent material. The aerobic fermentation chamber is equipped with a composting trough. The sludge dried in the drying chamber is transported to the composting trough. The chemical dosing system adds chemicals to the composting trough for aerobic fermentation. The bottom of the composting trough is equipped with an aeration system. The top of the aerobic fermentation chamber is made of a translucent material, and the upper part of the aerobic fermentation chamber is equipped with ventilation openings.

[0005] In a preferred embodiment, the roof of both the drying chamber and the aerobic fermentation chamber includes a sunny-side sloping roof and a shady-side sloping roof. The sunny-side sloping roof is made of a light-transmitting material, and the shady-side sloping roof is equipped with photovoltaic panels.

[0006] In a preferred embodiment, the drying chamber is equipped with a condensate collection system, including a condensate collection tank located under the sloping roof. The condensate collection tank transports the condensate to a condensate collection pit located at the bottom of the drying chamber via a conduit. The condensate in the condensate collection pit is either directly discharged or recycled.

[0007] In a preferred embodiment, the bottom of the drying chamber is equipped with a leachate collection system, including a leachate collection tank, which is connected to a leachate collection pit. The leachate from the leachate collection pit enters the regulating tank of the rural sewage treatment plant by extraction or gravity flow.

[0008] In a preferred embodiment, the drying chamber is further equipped with a heating system for heating the drying chamber.

[0009] In a preferred embodiment, the air inlet of the first blower is connected to the aerobic fermentation chamber via a pipe.

[0010] In a preferred embodiment, the aerobic fermentation chamber includes a second blower, the air inlet of which is connected to the drying chamber, and the air outlet is provided with several branch air supply pipes located at different heights of the composting trough.

[0011] In a preferred embodiment, the aerobic fermentation chamber is equipped with a temperature sensor and a humidity sensor. The temperature sensor is located at different depths of the composting tank, and the humidity sensor is located inside and outside the composting tank.

[0012] In the preferred embodiment, a control module is also included, comprising: The ventilation submodule is used to adjust the ventilation rate of the drying chamber based on future weather conditions and the current processing load of the drying chamber. The control rules for the ventilation submodule are as follows: Based on future weather conditions and the current processing load of the drying chamber, adjust the ventilation rate of the drying chamber as follows: ; in, t Current time; It will begin in the afternoon; The afternoon session will end at [time]. For the capacity of the drying silo; This represents the current processing load of the drying chamber; The minimum free space required for the drying chamber to receive new sludge; The ventilation rate of the drying chamber; The drying chamber is designed with a high ventilation rate; The normal ventilation rate of the drying chamber is set; like ,but ;like ,but ; The weather forecast for tomorrow is shown below: 1 for sunny and 0 for cloudy.

[0013] In a preferred embodiment, the control module further includes an aeration submodule for controlling the aeration system based on preset priorities. These priorities include a first priority, a second priority, and a third priority. The first priority controls the aeration system based on the temperature difference within the aerobic fermentation chamber; the second priority controls the aeration system based on the humidity within the aerobic fermentation chamber; and the third priority controls the aeration system based on future weather conditions and the current processing load of the aerobic fermentation chamber. Specifically: The first priority activation condition is the maximum temperature difference in the integrated aerobic fermentation chamber. , means as follows: ; in, This refers to the temperature of the upper layer of the compost bin; This refers to the temperature of the middle layer of the compost bin; This refers to the temperature of the lower layer of the compost bin. The temperature difference threshold of the compost pile within the compost bin; like ,but , , The aeration rate of the aerobic fermentation chamber. To achieve the high aeration rate of the aerobic fermentation chamber, The air volume of the blower is the same as that of the second blower. At the maximum air volume of the second blower, the second blower will induce hot air to the low temperature layer through the branch air supply duct; If the first priority is not activated, the activation condition for the second priority is the maximum humidity difference in the aerobic fermentation chamber. When activated with the second priority, it is represented as follows: ; in, The preset humidity difference threshold for the aerobic fermentation chamber; The aerobic fermentation chamber was designed with a low aeration rate. The normal aeration rate for the set aerobic fermentation chamber; To maintain humidity in the aerobic fermentation chamber, This represents the upper limit of humidity in the aerobic fermentation chamber. This represents the lower limit of humidity in an aerobic fermentation chamber. If neither the first nor the second priority is activated, the activation condition for the third priority is that the weather will be sunny tomorrow. When the third priority is activated, the aerobic fermentation chamber is instructed to increase the aeration rate when the electricity price is low at night, as shown below: ; like ,but ; in, This is the start time of night; This is the end time of the night. Capacity of the aerobic fermentation chamber; This represents the current processing load of the aerobic fermentation chamber. This is the minimum available space required for the fermentation chamber to receive new dry materials.

[0014] The present invention provides a system for reducing and recycling waste sludge from rural domestic sewage treatment, which has the following beneficial effects: The drying chamber utilizes solar energy to raise the temperature inside, accelerating the evaporation of moisture from the sludge, and uses natural ventilation to remove moisture, achieving preliminary dehydration and volume reduction of the sludge. The dried sludge is then fermented in an aerobic fermentation chamber, realizing the resource utilization of the sludge. The system is intelligently controlled through a control module. This invention enables on-site, harmless treatment of rural sludge, transforming it into high-value organic fertilizer or soil conditioner for direct use in farmland or landscaping, forming a closed-loop management system. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the structural principle of a system for reducing and recycling residual sludge from rural domestic sewage treatment, provided in an embodiment of the present invention. In the diagram, 100 is the drying chamber, 110 is the multi-layer sludge drying bed, 120 is the sludge conveying pipe, 130 is the blowing system, 131 is the blowing pipe, 132 is the first blower, 140 is the ventilation hole, 150 is the condensate collection system, 151 is the condensate collection tank, 152 is the conduit, 153 is the condensate collection pit, 160 is the leachate collection system, 161 is the leachate collection tank, 162 is the leachate collection pit, and 170 is the heating system. 200 aerobic fermentation chamber, 210 composting trough, 220 aeration system, 230 vent, 240 second blower, 250 temperature sensor, 260 humidity sensor, 270 branch air supply duct. Photovoltaic panel module 300. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention.

[0017] This embodiment provides a system for reducing and recycling waste sludge from rural domestic sewage treatment, such as... Figure 1 As shown, it includes: a drying chamber 100 and an aerobic fermentation chamber 200.

[0018] The drying chamber 100 includes a condensate collection pit 153, a leachate collection tank 161, a multi-layer sludge drying bed 110, a heating system 170, a blower system 130, a condensate collection tank 151, and a conduit 152. A sludge suction and discharge rubber hose is installed on one side of the drying chamber 100 as a sludge conveying pipe 120. The multi-layer sludge drying bed 110 is located below the sludge discharge end of the conveying pipe 120. The conveying pipe 120 is used to draw sludge from outside the chamber into the chamber, utilizes natural sunlight to raise the temperature inside the chamber, accelerates the evaporation of moisture from the sludge, and utilizes natural ventilation to remove moisture, achieving preliminary dewatering and volume reduction of the sludge. Specifically, it includes: The drying chamber 100 is a sealed box structure with a sloping roof on the shaded side covered by a transparent or semi-transparent polycarbonate sheet. The bottom of the chamber is equipped with ventilation holes 140, a condensate collection pit 153, and a leachate collection tank 161.

[0019] The external structure of the drying chamber 100 includes the following: The external dimensions of the drying chamber 100 are 3m long, 2.5m wide, and 2.5m high. The drying chamber 100 has a double-sloped roof design, with the roof slope at an angle of 30-45 degrees to the horizontal direction, for installing solar panels. The solar panels are used to collect solar energy to supply the heating system 170 for auxiliary electric heating.

[0020] The roof on the sunny slope (west or south side) is made of double-layered heat-insulating, light-transmitting material (such as plexiglass or translucent glass), and the structural strength is no less than that required for a Category 12 typhoon.

[0021] The sloping roof on the shaded side (east or north) is made of reinforced concrete with an external insulation layer and glass lining the inner walls.

[0022] The internal structure of the drying chamber 100 includes the following: The leachate collection tank 161 has dimensions of 1.5m in length, 1.5m in width, and 0.3m in height. It is made of reinforced concrete and anti-seepage material, with a 3% slope to one corner. A leachate collection pit 162 is set at this corner. The leachate collection pit 162 has dimensions of 0.4m in length, 0.4m in width, and 1m in height. The leachate collection tank 161 is equipped with a sewage pump or return pipe to pump the leachate from the leachate collection pit 162 into the regulating tank of the rural sewage treatment plant.

[0023] The sludge multi-layer drying bed 110 has the following dimensions: the first layer has a length of 1.2m, a width of 1.2mm, a thickness of 8-12cm, and a net distance of 0.3m from the ground; the second layer has a length of 1.2m, a width of 0.8mm, a thickness of 8-12cm, and a net distance of 0.8m from the ground; the third layer has a length of 1.2m, a width of 0.6mm, a thickness of 8-12cm, and a net distance of 1.2m from the ground.

[0024] The sludge multi-layer drying bed 110 has a reinforced concrete or metal frame structure. If it is a metal frame structure, a breathable flow guiding layer (such as wood chips or straw fragments) needs to be built on the metal frame structure.

[0025] The sludge multi-layer drying bed 110 is used to collect sludge, and the sludge multi-layer drying bed 110 includes three layers of drying beds stacked on top of each other.

[0026] Preferably, each of the three drying beds is provided with a tray, and supports are fixedly provided on both sides of the three drying beds. Motors are provided on the supports, and rotors are provided on the motors. The rotors are fixedly connected to both sides of each drying bed. The motors are used to drive the rotors to rotate, thereby causing the three drying beds to flip. The motors are electrically connected to the control module. By flipping the trays, the dried sludge can be easily transferred.

[0027] A conveying device (such as a screw conveyor) is installed below the first layer of the three-layer drying bed. The conveying device is used to transport the dried sludge to the feed inlet of the composting tank 210 of the aerobic fermentation chamber 200.

[0028] The three-layer drying stack bed is stacked vertically, which greatly saves the floor space, which is crucial for rural areas where land is scarce. In addition, it can avoid the use of forklifts and other tools to transport sludge outside the warehouse, reducing odor diffusion and labor costs. Finally, the multi-layer drying stack bed 110 of sludge is connected to the control module to realize the automated process.

[0029] On sunny days, sunlight shines through the translucent roof to heat the drying chamber, raising the air inside to 35°C or higher, causing the moisture in the sludge to gradually evaporate. When the temperature fails to reach the predetermined level, the heating system 170 is activated for auxiliary heating. In this embodiment, the heating system 170 uses electric heating equipment powered by photovoltaic panels.

[0030] The blower system 130 includes a first blower 132 and a blower pipe 131. The first blower 132 is a small blower with a daily air supply of 200 m³ / h. 3 The air outlet section of the first blower 132 is connected to the blower pipe 131. An insulated pipe is installed at the air inlet of the first blower 132, and the insulated pipe is connected to the aerobic fermentation chamber 200. The blower pipe 131 is made of steel pipe, ductile iron pipe, copper pipe, or ABS composite material. The blower pipe 131 is laid out by connecting the vertical main pipe to the horizontal branch pipe. The branch pipe openings have a diameter of 0.5cm-1cm, the holes are evenly distributed, and the opening spacing is 20cm. The openings of each branch pipe are connected to the horizontal airflow 20cm above the corresponding sludge multi-layer drying bed 110 to increase the airflow speed on the sludge surface.

[0031] Both the sunny and shady pitched roofs are equipped with condensate collection tanks 151 at their lower ends. Water vapor rises to the pitched roof, cools upon contact with the inner glass layer (which has a lower temperature), and condenses into water droplets. The water then flows down the slope of the roof to the condensate collection tank 151. The condensate collection tank 151 is 3m long, 0.2m wide, and 0.2m high. Below the condensate collection tank 151 is a condensate collection pit 153, which is 1m long, 1m wide, and 1m high. The condensate collection tank 151 is connected to a conduit 152, which is DN32-DN50 in size. The lower part of the conduit 152 is connected to the condensate collection pit 153. The condensate collection pit 153 is equipped with a water pump. When the condensate reaches a certain level, it is either pumped out or discharged freely for use as a watering source for green spaces.

[0032] Preferably, the condensate collection pit 153 is connected to the reagent dosing system via a pipeline, and the condensate collection pit 153 is also equipped with a centrifugal pump, which is used to pump the collected condensate into the reagent dosing system through the pipeline.

[0033] Aerobic fermentation chamber 200: Used to receive the dried sludge from drying chamber 100 and ferment it. The internal structure of the fermentation chamber, from bottom to top, consists of an aeration system 220, a composting tank 210, a conditioner and microbial agent addition system, and a composting system, specifically including: The external structure of the aerobic fermentation chamber 200 includes the following: The aerobic fermentation chamber 200 has external dimensions of 5m in length, 2.5m in width, and 2.5m in height. It features a double-sloped roof design with the roof slope at an angle of 30-45 degrees to the horizontal. The chamber walls are equipped with an insulation layer, which can be made of materials such as straw mats, foam plastic boards (EPS / XPS), and rock wool.

[0034] The 200 aerobic fermentation chambers all have a sunny sloping roof and a shady sloping roof. The sunny sloping roof is made of light-transmitting material, while the shady sloping roof is equipped with photovoltaic panels.

[0035] The internal structure of the aerobic fermentation chamber 200 includes the following: The aeration system 220 includes a second blower 240, which is a micro-power blower with a daily air supply of 20-50 m³ / h. 3 The second blower 240 is placed on the ground. A ventilation opening 230 is opened on one side wall of the aerobic fermentation chamber 200, 30cm away from the crossbeam. Alternatively, a non-powered duct relying on the chimney effect can be used. The duct is not less than 9m above the ground and has a diameter of DN50~DN100. The cross-section of compost trough 210 is trapezoidal, with the upper and lower base dimensions being 60cm and 180cm respectively, a height of 100cm, a length of 3m, and the bottom plate being 0.6m from the ground. The chemical dosing system includes conditioner dosing and microbial agent dosing, both of which are done manually. The dried sludge is mixed with conditioners (such as straw, sawdust, rice husks, etc.) to adjust the carbon-to-nitrogen ratio (C / N) and porosity.

[0036] Through the internal structure of the aerobic fermentation chamber 200, the temperature of the compost pile can be raised to above 60 degrees Celsius within 2 days and maintained for more than 15 days, resulting in a loose, odorless powdered organic fertilizer product. It has been used for fertilizing orchards near villages with good results.

[0037] The closed-loop airflow and condensate recovery system between the drying chamber 100 and the aerobic fermentation chamber 200 is shown below: An exhaust fan can also be installed on the upper side of one side of the aerobic fermentation chamber 200. The air supply end of the exhaust fan is connected to the air inlet end of the first blower 132 through an insulated pipe. The exhaust fan is used to lead the high temperature and high humidity (rich in ammonia, etc.) exhaust gas generated by the aerobic fermentation chamber 200 to the air inlet end of the first blower 132 through the insulated pipe, serving as a supplementary heat source and air source for the drying chamber 100. At the same time, the condensate (rich in organic matter and ammonia nitrogen) collected in the drying chamber 100 is pumped into the reagent dosing system of the aerobic fermentation chamber 200 through the pipeline to regulate the humidity of the pile (replacing clean water) and provide some nutrients.

[0038] Control Module: Used to construct an intelligent algorithm model. This model intelligently controls the system based on future weather conditions, combined with the pile temperature and humidity, the current processing load of drying chamber 100 and aerobic fermentation chamber 200, and ambient temperature and humidity. For example, if the algorithm predicts sunny weather tomorrow, it will increase ventilation in drying chamber 100 this afternoon to make room for receiving new sludge tomorrow; simultaneously, it will instruct the fermentation chamber to increase aeration when electricity prices are low at night, as it anticipates the arrival of new dried material tomorrow and needs to prepare space in advance; furthermore, when a large temperature difference is detected between different layers of the fermentation chamber, it not only adjusts the aeration but also activates the second blower to direct some hot air to the branch air supply duct 270 of the fermentation chamber to eliminate localized low-temperature zones. Specifically, this includes: The control module algorithm and implementation mainly include a temperature sensor 250 and a humidity sensor 260, which are embedded in the aerobic fermentation chamber 200 to monitor the temperature and humidity changes inside the pile. This module can be connected to and automatically control the start and stop of the aeration system 220 (optional function) to ensure that the aerobic fermentation process is in the best state. Basic temperature sensing parameters requirements: Temperature sensors 250 mm deep are installed in the upper, middle and lower layers of the pile to form a monitoring network to comprehensively reflect the fermentation status and prevent local overheating or incomplete fermentation; temperature measurement range 0~70℃; response time less than 5 min; allowable error range ±2℃.

[0039] Basic humidity sensor parameters requirements: humidity range of 0~100% in the upper part of the stack or in the air circulation area of ​​the silo wall; response time of 5~30s; allowable error range of ±5%.

[0040] The control module uses a low-cost PLC (such as Siemens S7-1200) or an industrial microcontroller (such as Arduino Industrial101) as its core. The actuator in the control module is connected to the frequency converter to control the speed of the blower, thereby precisely controlling the air volume instead of simply "on / off", achieving more precise energy-saving control; The control module features a human-machine interface (HMI), equipped with a touchscreen or a mobile app connected via Wi-Fi, which displays temperature curves, humidity values, aeration status, and historical data in real time, and allows manual parameter settings.

[0041] The control module includes a ventilation submodule and an aeration submodule.

[0042] The ventilation submodule is used to adjust the ventilation rate of the drying chamber based on future weather conditions and the current processing load of the drying chamber. The control rules for the ventilation submodule are as follows: Based on future weather conditions and the current processing load of the drying chamber, adjust the ventilation rate of the drying chamber as follows: ; in,t Current time; It will start in the afternoon; The afternoon session will end at [time]. For the capacity of the drying silo; This represents the current processing load of the drying chamber; The minimum free space required for the drying chamber to receive new sludge; The ventilation rate of the drying chamber; The drying chamber is designed with a high ventilation rate; The normal ventilation rate of the drying chamber is set; like ,but ;like ,but ; The weather forecast for tomorrow is shown below: 1 for sunny and 0 for cloudy.

[0043] Greater than In this embodiment, The value range is 5~10 m³ / (h•m³ material) and The value range is 2~4 m³ / (h•m³ material).

[0044] The aeration submodule is used to control the aeration system based on preset priorities. These priorities include a first priority, a second priority, and a third priority. The first priority controls the aeration system based on the temperature difference within the aerobic fermentation chamber; the second priority controls the aeration system based on the humidity within the aerobic fermentation chamber; and the third priority controls the aeration system based on future weather conditions and the current processing load of the aerobic fermentation chamber. Specifically: The first priority activation condition is the maximum temperature difference in the integrated aerobic fermentation chamber. , It is expressed as follows: ; in, This refers to the temperature of the upper layer of the compost bin; This refers to the temperature of the middle layer of the compost bin; This refers to the temperature of the lower layer of the compost bin. The temperature difference threshold of the compost pile inside the compost bin; like ,but , , The aeration rate of the aerobic fermentation chamber. To achieve the high aeration rate of the aerobic fermentation chamber, The air volume of the blower is the same as that of the second blower. At the maximum airflow of the second blower, the second blower draws hot air to the low-temperature layer through branch air ducts (based on...). , , (The minimum value in the system automatically selects branch air supply ducts of different depths). If the first priority is not activated, the activation condition for the second priority is the maximum humidity difference in the aerobic fermentation chamber. When activated with the second priority, it is represented as follows: ; in, The preset humidity difference threshold for the aerobic fermentation chamber; The aerobic fermentation chamber was designed with a low aeration rate. The normal aeration rate for the set aerobic fermentation chamber; To maintain humidity in the aerobic fermentation chamber, This represents the upper limit of humidity in the aerobic fermentation chamber. This represents the lower limit of humidity in an aerobic fermentation chamber. In this embodiment, the low aeration rate is 3~6 m³ / (h•m³ material), the normal aeration rate is 9~12 m³ / (h•m³ material), and the high aeration rate is 15~20 m³ / (h•m³ material).

[0045] If neither the first nor the second priority is activated, the activation condition for the third priority is that the weather will be sunny tomorrow. When the third priority is activated, the aerobic fermentation chamber is instructed to increase the aeration rate when the electricity price is low at night, as shown below: ; like ,but ; in, The start time of night, for example, 22:00; This refers to the end time of the night, such as 06:00 the next day; Capacity of the aerobic fermentation chamber; This represents the current processing load of the aerobic fermentation chamber. This is the minimum available space required for the fermentation chamber to receive new dry materials.

[0046] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A system for reducing and recycling waste sludge from rural domestic sewage treatment, characterized in that, Includes a drying chamber and an aerobic fermentation chamber; The drying chamber contains a multi-layer sludge drying bed, with a sludge conveying pipe above each layer to transport the sludge to be treated to the multi-layer sludge drying bed. The drying chamber is equipped with a blower system, which includes blower pipes located above each layer of the multi-layer sludge drying bed. The blower pipes are connected to a first blower for blowing air. Ventilation holes are provided at the bottom of the side wall of the drying chamber. The roof of the drying chamber is a sloping roof made of translucent material. The aerobic fermentation chamber is equipped with a composting trough. The sludge dried in the drying chamber is transported to the composting trough. The chemical dosing system adds chemicals to the composting trough for aerobic fermentation. The bottom of the composting trough is equipped with an aeration system. The top of the aerobic fermentation chamber is made of a translucent material, and the upper part of the aerobic fermentation chamber is equipped with ventilation openings.

2. The system for reducing and recycling residual sludge from rural domestic sewage treatment according to claim 1, characterized in that, The roofs of the drying chamber and the aerobic fermentation chamber both include a sunny-facing sloping roof and a shady-facing sloping roof. The sunny-facing sloping roof is made of a light-transmitting material, and the shady-facing sloping roof is equipped with photovoltaic panels.

3. The system for reducing and recycling residual sludge from rural domestic sewage treatment according to claim 1, characterized in that, The drying chamber is equipped with a condensate collection system, including a condensate collection tank located under the sloping roof. The condensate collection tank transports the condensate through a conduit to a condensate collection pit located at the bottom of the drying chamber. The condensate in the condensate collection pit is either directly discharged or recycled.

4. The system for reducing and recycling residual sludge from rural domestic sewage treatment according to claim 1, characterized in that, The bottom of the drying chamber is equipped with a leachate collection system, including a leachate collection tank, which is connected to a leachate collection pit. The leachate from the leachate collection pit enters the regulating tank of the rural sewage treatment plant by extraction or gravity flow.

5. A system for reducing and recycling residual sludge from rural domestic sewage treatment according to claim 1, characterized in that, The drying chamber is also equipped with a heating system for heating the drying chamber.

6. The system for reducing and recycling residual sludge from rural domestic sewage treatment according to claim 1, characterized in that, The air inlet of the first blower is connected to the aerobic fermentation chamber via a pipe.

7. The system for reducing and recycling residual sludge from rural domestic sewage treatment according to claim 1, characterized in that, The aerobic fermentation chamber includes a second blower. The air inlet of the second blower is connected to the drying chamber, and the air outlet is provided with several branch air supply pipes located at different heights of the composting tank.

8. The system for reducing and recycling residual sludge from rural domestic sewage treatment according to claim 1, characterized in that, The aerobic fermentation chamber is equipped with temperature and humidity sensors. The temperature sensors are located at different depths in the composting tank, while the humidity sensors are located both inside and outside the composting tank.

9. A system for reducing and recycling residual sludge from rural domestic sewage treatment according to claim 1, characterized in that, It also includes a control module, including: The ventilation submodule is used to adjust the ventilation rate of the drying chamber based on future weather conditions and the current processing load of the drying chamber. The control rules for the ventilation submodule are as follows: Based on future weather conditions and the current processing load of the drying chamber, adjust the ventilation rate of the drying chamber as follows: ； in, t Current time; It will start in the afternoon; The afternoon session will end at [time]. For the capacity of the drying silo; This represents the current processing load of the drying chamber; The minimum free space required for the drying chamber to receive new sludge; The ventilation rate of the drying chamber; The drying chamber is designed with a high ventilation rate; The normal ventilation rate of the drying chamber is set; like ,but ;like ,but ; The weather forecast for tomorrow is shown below: 1 for sunny and 0 for cloudy.

10. A system for reducing and recycling residual sludge from rural domestic sewage treatment according to claim 9, characterized in that, The control module also includes an aeration submodule for controlling the aeration system based on preset priorities. These priorities include a first priority, a second priority, and a third priority. The first priority controls the aeration system based on the temperature difference within the aerobic fermentation chamber; the second priority controls the aeration system based on the humidity within the aerobic fermentation chamber; and the third priority controls the aeration system based on future weather conditions and the current processing load of the aerobic fermentation chamber. Specifically: The first priority activation condition is the maximum temperature difference in the integrated aerobic fermentation chamber. , means as follows: ； in, This refers to the temperature of the upper layer of the compost bin; This refers to the temperature of the middle layer of the compost bin; This refers to the temperature of the lower layer of the compost bin. The temperature difference threshold of the compost pile inside the compost bin; like ,but , , The aeration rate of the aerobic fermentation chamber. To achieve the high aeration rate of the aerobic fermentation chamber, The air volume of the blower is the same as that of the second blower. At the maximum air volume of the second blower, the second blower will induce hot air to the low temperature layer through the branch air supply duct; If the first priority is not activated, the activation condition for the second priority is the maximum humidity difference in the aerobic fermentation chamber. When activated with the second priority, it is represented as follows: ； in, The preset humidity difference threshold for the aerobic fermentation chamber; The aerobic fermentation chamber was designed with a low aeration rate. The normal aeration rate for the set aerobic fermentation chamber; To maintain humidity in the aerobic fermentation chamber, This represents the upper limit of humidity in the aerobic fermentation chamber. This represents the lower limit of humidity in an aerobic fermentation chamber. If neither the first nor the second priority is activated, the activation condition for the third priority is that the weather will be sunny tomorrow. When the third priority is activated, the aerobic fermentation chamber is instructed to increase the aeration rate when the electricity price is low at night, as shown below: ； like ,but ; in, This is the start time of night; This is the end time of the night. Capacity of the aerobic fermentation chamber; This represents the current processing load of the aerobic fermentation chamber. This is the minimum available space required for the fermentation chamber to receive new dry materials.

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