Rural sewage coagulation straw filtration treatment and fertilization system

Abstract

The invention belongs to the technical field of rural sewage treatment, and particularly relates to a rural sewage coagulation straw filtration treatment and fertilization system which comprises a septic tank, a natural hydrolysis cavity, a coagulation stirring cavity, a resource recovery cavity and a chlorinated clear water cavity, a water outlet of the septic tank is communicated with a water inlet of the natural hydrolysis cavity, the natural hydrolysis cavity is communicated with the coagulation 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 in the barrel II, the barrel II is arranged in the barrel III, the barrel III is arranged in the barrel IV, and the upper portion of the coagulation stirring cavity is communicated with the barrel I through a water passing pipe. A plurality of water passing holes are formed in the side walls of the barrel I and the barrel II and the bottom of the barrel III, a space defined by the barrel II and the barrel I is filled with a straw matrix filter material, and the upper part of the barrel IV is communicated with a chlorinated clear water cavity. According to the method, C / N pollutants in sewage are synchronously removed by combining physical coagulation with the straw matrix filter material, and the problems that a traditional biological method is poor in load resistance and difficult to operate at low temperature are effectively solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of rural sewage treatment, and relates to a rural sewage coagulation straw filtration treatment and fertilizer system, specifically a sewage treatment and resource utilization system designed for the specific environmental and economic conditions of rural areas in high-cold areas. Background Art

[0002] The current status of rural sewage treatment is generally characterized by scattered distribution, disorderly discharge, difficult governance, and weak management. Most of the existing rural sewage treatment facilities use simple urban sewage treatment processes, which are poorly adaptable to rural sewage and lack operation and management talents, resulting in poor operation results. In addition, rural areas generally pay less attention to sewage treatment, lack sufficient environmental awareness and participation, which restricts the in-depth promotion of rural sewage treatment. At present, some technical solutions for rural sewage treatment have been proposed. For example, in the Chinese invention patent with publication number CN117923734A, a comprehensive treatment method for rural domestic sewage is disclosed, which mainly adds coagulants and flocculants to sewage for precipitation treatment, then collects sludge and feces for fermentation treatment to obtain organic fertilizer, and finally disinfects the purified water. Although this method realizes the treatment and resource utilization of sewage to a certain extent, it does not fully consider the characteristics and treatment difficulties of rural sewage in high-cold areas. In addition, in the Chinese invention patent with publication number CN106007173A, a technical solution for filtering water bodies using straw is disclosed. This solution uses the adsorption and filtration effects of straw to remove pollutants from water bodies. However, this solution mainly focuses on the filtration treatment of water bodies, and does not involve the comprehensive treatment and resource utilization of sewage. There is also a lack of specific verification of the treatment effect of rural sewage in high-altitude and cold regions. Summary of the invention

[0003] In order to solve the problems of high energy consumption, poor load resistance, poor effect, low degree of resource utilization and difficult sludge disposal in the existing sewage treatment methods in treating rural wastewater in high-cold areas, the present invention aims to provide a system that is more suitable for rural sewage treatment and resource utilization in high-cold areas, study the problems of physical coagulation combined with straw-based materials to absorb and capture pollutants and composting resources, discover high-efficiency coagulants and straw-based absorption and capture materials, explore the mechanism of coagulation + absorption + composting combined with efficient treatment of rural sewage in high-cold areas, and propose a new way suitable for the resource utilization of rural sewage in high-cold areas.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A rural sewage coagulation straw filtration treatment and fertilizer system comprises a septic tank, a natural hydrolysis chamber, a coagulation stirring chamber, a resource recovery chamber and a chlorination clean water chamber; the water outlet of the septic tank is connected with the water inlet of the natural hydrolysis chamber, the natural hydrolysis chamber is connected with the coagulation stirring chamber, the resource recovery chamber comprises barrels I, II, III and IV, the barrel I is arranged inside barrel II, the barrel II is arranged inside barrel III, and the barrel III is arranged inside barrel IV, the upper part of the coagulation stirring chamber is connected with barrel I through a water pipe, a plurality of water holes are arranged on the side walls of barrels I and II and on the bottom of barrel III, the space enclosed between the side walls of barrels II and I is filled with crushed straw matrix filter material, and the upper part of barrel IV is connected with the chlorination clean water chamber.

[0006] A biological coagulant is added into the coagulation stirring chamber, and an aeration device I is arranged 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 arranged at the bottom of the barrel III, and the aeration device II is connected to the air pump.

[0008] A float liquid level switch and a water pump are arranged inside the chlorine-added clean water chamber, and both the float liquid level switch and the water pump are electrically connected to the controller.

[0009] Inspection holes are arranged on the tops of the septic tank, the natural hydrolysis chamber, the coagulation and stirring chamber, the resource recovery chamber and the chlorination and clean water chamber.

[0010] A ventilation pipe is vertically arranged inside the inspection hole corresponding to the resource recovery chamber, a guide groove is vertically arranged on the outer wall of the barrel II, the guide groove is slidably connected to the ventilation pipe, a traction rope is connected to the top of the barrel II, and the end of the traction rope extends to the outlet of the inspection hole.

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

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

[0013] The water inlet of the natural hydrolysis chamber is communicated with the water outlet of the grey water.

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

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. Physical coagulation combined with straw matrix filter material is used to achieve simultaneous removal of C / N pollutants in sewage, effectively solving the problems of poor load resistance and difficulty in low-temperature operation of traditional biological methods;

[0017] 2. Aerobic composting technology is used to realize resource utilization of C / N elements in sewage, effectively reducing C emissions and energy consumption. At the same time, fertilizer conversion solves the sludge problem of biological treatment technology and is suitable for the development of green agriculture in Northeast China;

[0018] 3. Use straw to prepare filter media, which is local raw material. The idea of ​​waste treatment with waste is to achieve comprehensive utilization of rural solid waste while achieving sewage purification. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Flow chart of treating sewage using the rural sewage coagulation straw filtration treatment and fertilizer system of the present invention;

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

[0021] Figure 3 It is a vertical view of the rural sewage coagulation straw filtration treatment and fertilizer system of the present invention;

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

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

[0024] In the figure, 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. barrel I, 42. barrel II, 43. barrel III, 44. barrel IV, 45. aeration device II, 46. ventilation pipe, 47. guide groove, 48. traction rope, 49. water hole, 51. float liquid level switch, 52. water pump. DETAILED DESCRIPTION

[0025] The following will be combined with the attached Figure 1-5 The technical solutions in the present invention are clearly and completely described in the accompanying drawings and embodiments. Obviously, the described embodiments are only part of the embodiments of the invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection of the present invention.

[0026] Embodiment 1:

[0027] A rural sewage coagulation straw filtration treatment and fertilizer system, the system is located below the ground level, including a septic tank 1, a natural hydrolysis chamber 2, a coagulation stirring chamber 3, a resource recovery chamber 4 and a chlorinated water chamber 5; the water outlet of the septic tank 1 is connected with the water inlet of the natural hydrolysis chamber 2, the natural hydrolysis chamber 2 is connected with the coagulation stirring chamber 3, the resource recovery chamber 4 includes a barrel I 41, a barrel II 42, a barrel III 43, and a barrel IV 44, the barrel I 41 is arranged in the barrel II 4 2, barrel II 42 is arranged inside barrel III 43, barrel III 43 is arranged inside barrel IV 44, the upper part of the coagulation and stirring chamber 3 is connected with barrel I 41 through a water pipe 32, a plurality of water holes 49 are arranged on the side walls of barrel I 41 and barrel II 42 and on the bottom of barrel III 43, the space enclosed between the side walls of barrel II 42 and the side walls of barrel I 41 is filled with crushed straw matrix filter material, and the upper part of barrel IV 44 is connected with the chlorine-added clean water chamber 5.

[0028] The water inlet of the natural hydrolysis chamber 2 is connected with the water outlet of the grey water; rural sewage includes grey water and black water, black water is toilet sewage, 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 pre-treated in the septic tank 1, and the grey water is pre-treated to remove solids and oil stains. The two pre-treated wastewaters can enter the system for treatment only after the concentration reaches the rural sewage design standard after mixing.

[0029] The process of rural sewage treatment is as follows: the mixed wastewater is balanced in the natural hydrolysis chamber 2, and the hydrolysis reaction occurs at the same time, flows to the coagulation and stirring chamber 3 for coagulation treatment, and then passes through the resource recovery chamber 4 for straw filtration, flows to the chlorination and clean water chamber 5 for deep treatment, and the tail water is discharged for water resource utilization, such as Figure 1 shown.

[0030] Furthermore, a biocoagulant is added to the coagulation and stirring chamber 3, and an aeration device I31 is provided at the bottom, and the aeration device I31 is connected to the air pump 6, and the air pump 6 is electrically connected to the controller 7. The air pump 6 and the controller 7 are both provided inside the control box 9. The flocculation and coagulation stirring reaction is realized in the coagulation and stirring chamber 3, and the mixed liquid after gas stirring enters the resource recovery chamber 4.

[0031] Furthermore, barrel Ⅰ41 in the resource recovery chamber 4 is a central water distribution barrel. The suspended wastewater after coagulation enters barrel Ⅰ41, and then enters barrel Ⅱ42 through a plurality of water holes 49 on the side wall of barrel Ⅰ41. After being filtered by the straw matrix filter material inside barrel Ⅱ42, SS is adsorbed and intercepted in the straw matrix filter material, and then the filtered wastewater enters barrel Ⅲ43 through a plurality of water holes 49 on the side wall of barrel Ⅱ42. An aeration device Ⅱ45 is provided at the bottom of barrel Ⅲ43. The aeration device Ⅱ45 is connected to the air pump 6. The wastewater inside barrel Ⅲ43 is in an aerobic state and flows into barrel Ⅳ44 through the water holes 49 at the bottom of barrel Ⅲ43 for static sedimentation, and the supernatant flows into the chlorine-added clean water chamber 5.

[0032] Furthermore, a float liquid level switch 51 and a water pump 52 are provided inside the chlorinated clean water chamber 5, and both the float liquid level switch 51 and the water pump 52 are electrically connected to the controller 7. The treated qualified water is disinfected in this chamber by adding chlorine-containing disinfectant. When the water in the chamber accumulates to a certain liquid level, the float liquid level switch 51 transmits a signal to the controller 7 to start the water pump 52, and lifts the clean water to the outdoors for resource utilization.

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

[0034] Furthermore, inspection holes 8 are provided on the tops of the septic tank 1 , the natural hydrolysis chamber 2 , the coagulation and mixing chamber 3 , the resource recovery chamber 4 and the chlorination and clean water chamber 5 .

[0035] Furthermore, a vent pipe 46 is vertically arranged inside the inspection hole 8 corresponding to the resource recovery chamber 4, and a guide groove 47 is vertically arranged on the outer wall of the barrel II 42, and the guide groove 47 is slidably connected to the vent pipe 46. A traction rope 46 is connected to the top of the barrel II 42, and the end of the traction rope 46 extends to the outlet of the inspection hole 8. Through the traction of the traction rope 46, the barrel II 42 is lifted out of the cavity along the slide rail composed of the vent pipe 46 and the guide groove 47 to replace the straw matrix filter material for resource fertilizer utilization. Preferably, there are four vent pipes 46, which are distributed on the outside of the barrel II 42, and there are two guide grooves 47, which are arranged corresponding to two of the vent pipes 46.

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

[0037] Preferably, the aeration device I31 is an aeration head, and the aeration device II45 is an oxygenation, purge and backflush pipe.

[0038] The present invention realizes the removal of C / N pollutants in sewage simultaneously by optimizing the composite coagulation process and combining the straw matrix filter material through coagulant screening experiments and operating condition response surface method; the best straw filling method is selected through different types of straw (corn straw, rice straw, wheat straw), straw combination mode and straw filling degree, and the straw is used as the filter medium and the original raw material to realize the comprehensive utilization of rural solid waste by waste treatment; the aerobic composting technology is adopted to cultivate and screen the dominant strains in the composite biological purification tank, so as to realize the resource utilization of C / N elements in sewage.

[0039] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A rural sewage coagulation straw filtration treatment and fertilizer system, comprising a septic tank (1), characterized in that: The system further comprises a natural hydrolysis chamber (2), a coagulation and stirring chamber (3), a resource recovery chamber (4) and a chlorinated water chamber (5); the water outlet of the septic tank (1) is connected to the water inlet of the natural hydrolysis chamber (2), the natural hydrolysis chamber (2) is connected to the coagulation and stirring chamber (3), the resource recovery chamber (4) comprises a barrel I (41), a barrel II (42), a barrel III (43) and a barrel IV (44), the barrel I (41) is arranged inside the barrel II (42), the barrel II (42) is arranged inside the barrel The barrel III (43) is arranged inside the barrel IV (44), the upper part of the coagulation and stirring chamber (3) is connected with the barrel I (41) through a water pipe (32), and a plurality of water holes (49) are arranged on the side walls of the barrel I (41) and the barrel II (42) as well as on the bottom of the barrel III (43), and the space enclosed between the side walls of the barrel II (42) and the barrel I (41) is filled with crushed straw matrix filter material, and the upper part of the barrel IV (44) is connected with the chlorine-added clean water chamber (5).

2. A rural sewage coagulation straw filtration treatment and fertilizer system according to claim 1, characterized in that: A biological coagulant is added into the coagulation stirring chamber (3), and an aeration device I (31) is arranged 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).

3. A rural sewage coagulation straw filtration treatment and fertilizer system according to claim 2, characterized in that: An aeration device II (45) is provided at the bottom of the barrel III (43), and the aeration device II (45) is connected to the air pump (6).

4. A rural sewage coagulation straw filtration treatment and fertilizer system according to claim 2, characterized in that: A float liquid level switch (51) and a water pump (52) are arranged inside the chlorinated water chamber (5), and both the float liquid level switch (51) and the water pump (52) are electrically connected to the controller (7).

5. A rural sewage coagulation straw filtration treatment and fertilizer system according to claim 3, characterized in that: Inspection holes (8) are arranged on the tops of the septic tank (1), the natural hydrolysis chamber (2), the coagulation and stirring chamber (3), the resource recovery chamber (4) and the chlorination and clean water chamber (5).

6. A rural sewage coagulation straw filtration treatment and fertilizer system according to claim 5, characterized in that: A ventilation pipe (46) is vertically arranged inside the inspection hole (8) corresponding to the resource recovery chamber (4), and a guide groove (47) is vertically arranged on the outer wall of the barrel II (42), and the guide groove (47) is slidably connected to the ventilation pipe (46). A traction rope (48) is connected to the top of the barrel II (42), and the end of the traction rope (48) extends to the outlet of the inspection hole (8).

7. A rural sewage coagulation straw filtration treatment and fertilizer system according to claim 6, characterized in that: The lower end of the ventilation pipe (46) is connected to the aeration device II (45), and the upper end of the ventilation pipe (46) is connected to the air pump (6).

8. The rural sewage coagulation straw filtration treatment and fertilizer system according to claim 1 is characterized by: Chlorine-containing disinfectant is added into the chlorine-added clean water chamber (5).

9. The rural sewage coagulation straw filtration treatment and fertilizer system according to claim 1, characterized in that: The water inlet of the natural hydrolysis chamber (2) is communicated with the water outlet of the grey water.

10. The rural sewage coagulation straw filtration treatment and fertilizer system according to claim 1, characterized in that: The septic tank (1) is a three-compartment septic tank.

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