Rural sewage coagulation and straws filtration treatment and fertilizer system

Abstract

The present application belongs to the technical field of rural sewage treatment, and a specific scheme is a rural sewage coagulation and straw filtration treatment and fertilizerization system, which comprises a septic tank, a natural hydrolysis cavity, a coagulation and stirring cavity, a resource recovery cavity and a chlorine water adding cavity; the water outlet of the septic tank is communicated with the water inlet of the natural hydrolysis cavity, the natural hydrolysis cavity is communicated with the coagulation and stirring cavity, the resource recovery cavity comprises a barrel I, a barrel II, a barrel III and a barrel IV, the barrel I is arranged inside the barrel II, the barrel II is arranged inside the barrel III, the barrel III is arranged inside the barrel IV, the upper portion of the coagulation and stirring cavity is communicated with the barrel I through a water passing pipe, a plurality of water passing holes are arranged on the side walls of the barrel I and the barrel II and the bottom of the barrel III, the space surrounded by the barrel II and the barrel I is filled with straw matrix filter material, and the upper portion of the barrel IV is communicated with the chlorine water adding cavity. The present application realizes the synchronous removal of C / N pollutants in sewage by using physical coagulation combined with straw matrix filter material, and effectively solves the problems of poor load resistance and difficult low-temperature operation of the traditional biological method.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of rural sewage treatment, and relates to a rural sewage coagulation and straw filtration treatment and fertilizerization system, in particular to a sewage treatment and resource utilization system designed for specific environmental and economic conditions in rural areas in alpine regions. BACKGROUND

[0002] The current situation of rural sewage treatment as a whole presents the characteristics of scattered distribution, random discharge, difficult treatment, and weak management. Most of the existing rural sewage treatment facilities use simple urban sewage treatment processes, which have poor adaptability to rural sewage, and lack of operation and management personnel, resulting in poor operation effect. In addition, the importance of sewage treatment in rural areas is generally low, and there is a lack of sufficient environmental awareness and participation, which restricts the in-depth promotion of rural sewage treatment work. At present, some technical solutions for rural sewage treatment have been proposed. For example, in the Chinese invention patent with the publication number CN117923734A, a comprehensive treatment method for rural domestic sewage is disclosed, which mainly adds coagulants and flocculants to the sewage for sedimentation treatment, then collects sludge and feces for fermentation treatment to obtain organic fertilizer, and finally disinfects the purified water. This method, although to some extent, realizes the treatment and resource utilization of sewage, does not fully consider the characteristics and treatment difficulty of rural sewage in alpine regions. In addition, in the Chinese invention patent with the publication number CN106007173A, a technical solution using straw to filter water is disclosed. This solution uses the adsorption and filtration effect of straw to remove pollutants in water. However, this solution mainly focuses on the filtration treatment of water and does not involve the comprehensive treatment and resource utilization of sewage, and the treatment effect of rural sewage in alpine regions also lacks specific verification. SUMMARY

[0003] In order to solve the problems of high energy consumption, poor load resistance, poor effect, low resource utilization degree, and difficult sludge disposal in the treatment of rural wastewater in alpine regions in the prior art, the present application aims to provide a system more suitable for rural sewage treatment and resource utilization in alpine regions, to study physical coagulation combined with straw substrate material absorption and capture of pollutants and compost resource utilization, to explore efficient coagulants and absorption and capture materials based on straw substrate, to explore the mechanism of coagulation + absorption + compost combined efficient treatment of rural sewage in alpine regions, and to propose a new way suitable for rural sewage resource utilization in alpine regions.

[0004] In order to achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0005] A rural sewage coagulation and straw filtration treatment and fertilizer system includes a septic tank, a natural hydrolysis chamber, a coagulation and mixing chamber, a resource recovery chamber, and a chlorinated water chamber. The outlet of the septic tank is connected to the inlet of the natural hydrolysis chamber, which is also connected to the coagulation and mixing chamber. The resource recovery chamber includes four containers: container I, container II, container III, and container IV. Container I is located inside container II, container II is located inside container III, and container III is located inside container IV. The upper part of the coagulation and mixing chamber is connected to container I via a water pipe. Several water passages are provided on the side walls of containers I and II, as well as at the bottom of container III. The space between the side walls of containers II and I is filled with pulverized straw matrix filter media. The upper part of container IV is connected to the chlorinated water chamber.

[0006] Biological coagulant is added inside the coagulation mixing chamber, and an aeration device I is installed at the bottom. The aeration device I is connected to an air pump, and the air pump is electrically connected to a controller.

[0007] An aeration device II is installed at the bottom of the tank III, and the aeration device II is connected to the air pump.

[0008] The chlorinated water chamber is equipped with a float level switch and a water pump, both of which are electrically connected to the controller.

[0009] Inspection holes are provided on the top of the septic tank, natural hydrolysis chamber, coagulation mixing chamber, resource recovery chamber, and chlorinated water chamber.

[0010] A vent pipe is vertically installed inside the inspection hole corresponding to the resource recycling chamber. A guide groove is vertically installed on the outer wall of the barrel II. The guide groove is slidably connected to the vent pipe. A traction rope is connected to the top of the barrel II. The end of the traction rope extends to the outlet of the inspection hole.

[0011] The lower end of the vent pipe is connected to the aeration device II, and the upper end of the vent pipe is connected to the air pump.

[0012] Chlorine-containing disinfectant is added to the chlorinated water chamber.

[0013] The inlet of the natural hydrolysis chamber is connected to the outlet of the grey water.

[0014] The septic tank is a three-compartment septic tank.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The simultaneous removal of C / N pollutants from wastewater is achieved by combining physical coagulation with straw matrix filter media, which effectively solves the problems of poor load resistance and difficulty in low-temperature operation of traditional biological methods;

[0017] 2. The use of aerobic composting technology enables the resource utilization of C / N elements in wastewater, effectively reducing C emissions and energy consumption. At the same time, the fertilizer conversion solves the sludge problem of biological treatment technology and is suitable for the development of green agriculture in Northeast China.

[0018] 3. By using straw to prepare filter media, the raw materials are sourced locally, and the concept of treating waste with waste is adopted to achieve comprehensive utilization of rural solid waste while purifying sewage. Attached Figure Description

[0019] Figure 1 Flowchart of the rural sewage coagulation straw filtration treatment and fertilizer system of the present invention for sewage treatment;

[0020] Figure 2 This is a plan view of the rural sewage coagulation and straw filtration treatment and fertilizer system of the present invention;

[0021] Figure 3 This is an elevation view of the rural sewage coagulation and straw filtration treatment and fertilizer system of the present invention;

[0022] Figure 4 This is a plan view of the assembly of barrel I and barrel II;

[0023] Figure 5 This is an elevation view of the assembly of barrel I and barrel II;

[0024] In the diagram, 1. Septic tank, 2. Natural hydrolysis chamber, 3. Coagulation and mixing chamber, 4. Resource recovery chamber, 5. Chlorinated water chamber, 6. Air pump, 7. Controller, 8. Inspection hole, 9. Control box, 11. First chamber, 12. Second chamber, 13. Third chamber, 31. Aeration device I, 32. Water pipe, 41. Tank I, 42. Tank II, 43. Tank III, 44. Tank IV, 45. Aeration device II, 46. Vent pipe, 47. Guide groove, 48. Traction rope, 49. Water passage hole, 51. Float level switch, 52. Water pump. Detailed Implementation

[0025] The following will be combined with the appendix Figures 1-5 The embodiments described herein provide a clear and complete description of the technical solutions in this invention. Obviously, the described embodiments are only a part of the embodiments of the invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0026] Example 1:

[0027] A rural sewage coagulation and straw filtration treatment and fertilizer system is disclosed. The system is located below ground level and includes a septic tank 1, a natural hydrolysis chamber 2, a coagulation and mixing chamber 3, a resource recovery chamber 4, and a chlorinated water chamber 5. The outlet of the septic tank 1 is connected to the inlet of the natural hydrolysis chamber 2, and the natural hydrolysis chamber 2 is connected to the coagulation and mixing chamber 3. The resource recovery chamber 4 includes four containers: container I 41, container II 42, container III 43, and container IV 44. Container I 41 is located within container II 44. Inside the 2nd chamber, barrel II 42 is located inside barrel III 43, and barrel III 43 is located inside barrel IV 44. The upper part of the coagulation and mixing chamber 3 is connected to barrel I 41 through a water pipe 32. Several water holes 49 are provided on the side walls of barrel I 41 and barrel II 42, as well as the bottom of barrel III 43. The space enclosed between the side wall of barrel II 42 and the side wall of barrel I 41 is filled with pulverized straw substrate filter material. The upper part of barrel IV 44 is connected to the chlorinated water chamber 5.

[0028] The inlet of the natural hydrolysis chamber 2 is connected to the outlet of the grey water. Rural sewage includes grey water and black water. Black water is toilet wastewater, and grey water is used for washing, bathing, washing vegetables, and kitchen miscellaneous water. The two types of wastewater are collected separately. The black water is pretreated by septic tank 1, and the grey water is pretreated to remove solids and oil. The two types of pretreated wastewater are mixed and the concentration reaches the rural sewage design standard before they can enter the system for treatment.

[0029] The rural sewage treatment process is as follows: Mixed wastewater undergoes water quality equalization and hydrolysis simultaneously in the natural hydrolysis chamber 2, then flows to the coagulation and mixing chamber 3 for coagulation treatment. Afterwards, it passes through the resource recovery chamber 4 (straw filtration) and flows to the chlorinated water chamber 5 for further treatment. The effluent is then discharged for water resource utilization, such as… Figure 1 As shown.

[0030] Furthermore, a biological coagulant is added inside the coagulation and mixing chamber 3, and an aeration device I 31 is installed at the bottom. The aeration device I 31 is connected to an air pump 6, and the air pump 6 is electrically connected to a controller 7. Both the air pump 6 and the controller 7 are located inside the control box 9. The flocculation, coagulation, and mixing reaction is realized in the coagulation and mixing chamber 3, and the mixture after gas stirring enters the resource recovery chamber 4.

[0031] Furthermore, the bucket I 41 in the resource recycling chamber 4 is the central water distribution bucket. The suspended wastewater after coagulation enters the bucket I 41, and then enters the bucket II 42 through several water passages 49 on the side wall of the bucket I 41. After being filtered by the straw matrix filter material inside the bucket II 42, the suspended solids (SS) are adsorbed and intercepted in the straw matrix filter material. Then, the filtered wastewater enters the bucket III 43 through several water passages 49 on the side wall of the bucket II 42. The bottom of the bucket III 43 is equipped with an aeration device II 45, which is connected to the air pump 6. The wastewater inside the bucket III 43 is in an aerobic state and flows into the bucket IV 44 through the water passages 49 at the bottom of the bucket III 43 for static sedimentation. The supernatant flows into the chlorinated water chamber 5.

[0032] Furthermore, the chlorinated water chamber 5 is equipped with a float level switch 51 and a water pump 52. Both the float level switch 51 and the water pump 52 are electrically connected to the controller 7. The treated water that meets the standards is disinfected in this chamber by adding chlorine-containing disinfectant. When the water in the chamber accumulates to a certain level, the float level switch 51 sends a signal to the controller 7 to start the water pump 52, which lifts the clean water to the outside for resource utilization.

[0033] Furthermore, the septic tank 1 is a three-compartment septic tank, which includes a first chamber 11, a second chamber 12 and a third chamber 13. The first chamber 11 is connected to the second chamber 12, and the second chamber 12 is connected to the third chamber 13.

[0034] Furthermore, inspection holes 8 are provided on the top of the septic tank 1, the natural hydrolysis chamber 2, the coagulation and stirring chamber 3, the resource recycling chamber 4, and the chlorinated water chamber 5.

[0035] Furthermore, a vent pipe 46 is vertically installed inside the inspection hole 8 corresponding to the resource recycling chamber 4, and a guide groove 47 is vertically installed on the outer wall of the bucket II 42. The guide groove 47 is slidably connected to the vent pipe 46. A traction rope 46 is connected to the top of the bucket II 42, and the end of the traction rope 46 extends to the outlet of the inspection hole 8. By pulling the traction rope 46, the bucket II 42 is lifted out of the chamber along the slide rail formed by the vent pipe 46 and the guide groove 47 to replace the straw substrate filter material for resource fertilizer utilization. Preferably, there are four vent pipes 46, distributed on the outside of the bucket II 42, and two guide grooves 47, corresponding to two of the vent pipes 46.

[0036] Furthermore, the lower end of the vent pipe 46 is connected to the aeration device II 45, and the upper end of the vent pipe 46 is connected to the air pump 6.

[0037] Preferably, the aeration device I 31 is an aeration head, and the aeration device II 45 is an oxygenation purging backflush pipe.

[0038] This invention optimizes the composite coagulation process by using coagulant screening experiments and the operating condition response surface methodology, combining it with straw matrix filter media to simultaneously remove C / N pollutants from wastewater. By considering different types of straw (corn straw, rice straw, wheat straw), straw combination methods, and straw filling density, the optimal straw filling method is selected. Using straw as the filter medium, and with on-site raw materials, this invention achieves comprehensive utilization of rural solid waste. Furthermore, aerobic composting technology is employed to cultivate and screen dominant bacterial strains in the composite biological purification tank, realizing the resource utilization of C / N elements in wastewater.

[0039] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A wastewater coagulation and straw filtration treatment and fertilizer system for rural areas in high-altitude and cold regions, comprising a septic tank (1), characterized in that: The system also includes a natural hydrolysis chamber (2), a coagulation mixing chamber (3), a resource recovery chamber (4), and a chlorinated water chamber (5); the outlet of the septic tank (1) is connected to the inlet of the natural hydrolysis chamber (2), the natural hydrolysis chamber (2) is connected to the coagulation mixing chamber (3), the resource recovery chamber (4) includes bucket I (41), bucket II (42), bucket III (43), and bucket IV (44), bucket I (41) is located inside bucket II (42), bucket II (42) is located inside bucket III (43), bucket III (43) is located inside bucket IV (44), and the coagulation mixing chamber (3) is located on... The part is connected to the bucket I (41) through the water pipe (32). Several water holes (49) are provided on the side walls of the bucket I (41) and the bucket II (42) and the bottom of the bucket III (43). The space between the side walls of the bucket II (42) and the bucket I (41) is filled with crushed straw substrate filter material. The upper part of the bucket IV (44) is connected to the chlorinated water chamber (5). Biological coagulant is added inside the coagulation mixing chamber (3). An aeration device I (31) is provided at the bottom. The aeration device I (31) is connected to the air pump (6). The air pump (6) is electrically connected to the controller (7).

2. The wastewater coagulation and straw filtration treatment and fertilizer system for rural areas in high-altitude and cold regions according to claim 1, characterized in that: The bottom of the barrel Ⅲ (43) is provided with an aeration device Ⅱ (45), which is connected to the air pump (6).

3. The wastewater coagulation and straw filtration treatment and fertilizer system for rural areas in high-altitude and cold regions according to claim 1, characterized in that: The chlorinated water chamber (5) is equipped with a float level switch (51) and a water pump (52), both of which are electrically connected to the controller (7).

4. The wastewater coagulation and straw filtration treatment and fertilizer system for rural areas in high-altitude and cold regions according to claim 2, characterized in that: Inspection holes (8) are provided on the top of the septic tank (1), the natural hydrolysis chamber (2), the coagulation and mixing chamber (3), the resource recycling chamber (4), and the chlorinated water chamber (5).

5. The wastewater coagulation and straw filtration treatment and fertilizer system for rural areas in high-altitude and cold regions according to claim 4, characterized in that: A ventilation pipe (46) is vertically installed inside the inspection hole (8) corresponding to the resource recycling chamber (4). A guide groove (47) is vertically installed on the outer side wall of the bucket II (42). The guide groove (47) is slidably connected to the ventilation pipe (46). A traction rope (48) is connected to the top of the bucket II (42). The end of the traction rope (48) extends to the outlet of the inspection hole (8).

6. The wastewater coagulation and straw filtration treatment and fertilizer system for rural areas in high-altitude and cold regions according to claim 5, characterized in that: The lower end of the vent pipe (46) is connected to the aeration device II (45), and the upper end of the vent pipe (46) is connected to the air pump (6).

7. The wastewater coagulation and straw filtration treatment and fertilizer system for rural areas in high-altitude and cold regions according to claim 1, characterized in that: Chlorine-containing disinfectant is added to the chlorinated water chamber (5).

8. The wastewater coagulation and straw filtration treatment and fertilizer system for rural areas in high-altitude and cold regions according to claim 1, characterized in that: The inlet of the natural hydrolysis chamber (2) is connected to the outlet of the grey water.

9. The wastewater coagulation and straw filtration treatment and fertilizer system for rural areas in high-altitude and cold regions according to claim 1, characterized in that: The septic tank (1) is a three-compartment septic tank.

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