Rural resident domestic sewage recycling treatment device

Abstract

The utility model discloses a rural resident domestic sewage recycling treatment device, which relates to the field of sewage treatment and comprises a septic tank, a hydrolytic acidification tank, an oil separation well, an anaerobic purification tank and an ecological digestion tank. According to the treatment mode of the utility model, the treatment of sewage generated by domestic kitchen, washing, cleaning and bathing sewage is added, the combination of resource utilization and an agricultural production structure is preferentially considered, and the treatment technologies of hydrolytic acidification, anaerobic purification, multi-medium biological purification, small vegetable garden / small garden ecological digestion pool and the like are adopted; rural domestic sewage treatment is combined with rural courtyard economy and agricultural green development, and rural domestic sewage resource utilization is achieved nearby on site.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a device for resource treatment of rural domestic sewage. Background Art

[0002] At present, for decentralized rural domestic sewage treatment, the biological treatment technology of urban sewage (i.e., miniaturization of urban sewage process) is often adopted, which simplifies the complex urban sewage treatment technology. The disadvantages are that rural domestic sewage is discharged dispersedly, and it does not have the conditions for professional personnel management. In addition, the cost of pipe network construction is high, the collection cost is expensive, and the pipe network maintenance is difficult.

[0003] In recent years, with the continuous attention to rural environmental protection governance, some new rural sewage treatment technologies and equipment have been developed, mainly including constructed wetland and stabilization pond treatment technology, anaerobic biological treatment and buried micro-power treatment technology, anaerobic filter - oxidation pond - plant ecological channel combined treatment technology, anaerobic pond - drop - water aeration - constructed wetland, MBR membrane bioreactor and AO + MBR combined technology, AO - MBBR anaerobic - aerobic contact oxidation technology, biological aerated filter BAF, etc. With the improvement of the requirements for rural sewage discharge in environmentally sensitive areas such as water source protection, the AO + MBR combined technology has been widely used. The AO + MBR combined technology is formed by adding membrane modules to the aerobic tank of the traditional urban sewage treatment AO technology, and has the advantages of high treatment efficiency for COD, ammonia nitrogen, and total phosphorus, and stable effluent. However, all of the above processes have the disadvantages of large investment, high technical requirements for operation and management, high power consumption, and high operation cost, and it is difficult to actually carry out in most rural areas. For the above reasons, the utility model designs a device for resource treatment of rural domestic sewage. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the disadvantages existing in the prior art, and to provide a device for resource treatment of rural domestic sewage.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A device for resource treatment of rural domestic sewage includes:

[0007] A septic tank, into which the black water generated by rural households' toilets flows by gravity to remove impurities;

[0008] A hydrolysis acidification tank, in which microbial agents are pre - invested, and the hydrolysis acidification tank is connected to the septic tank through a pipeline;

[0009] An oil - separation well, through which the gray water generated by kitchens, laundry, cleaning, bathing, etc. in rural households is pretreated, and the oil - separation well and the septic tank are respectively connected to the hydrolysis acidification tank through pipelines;

[0010] Anaerobic purification tank, in which microorganisms are attached to the packing, and the hydrolysis acidification tank is connected to the anaerobic purification tank through a pipeline;

[0011] Ecological consumption pond, which is connected to the anaerobic purification tank through a pipeline.

[0012] In the above rural domestic sewage resource treatment device, the ecological consumption pond respectively includes a PAC membrane, greening vegetation, soil and mixed packing.

[0013] In the above rural domestic sewage resource treatment device, an anti-seepage film is arranged in the ecological consumption pond

[0014] In the above rural domestic sewage resource treatment device, a water distribution port is arranged in the septic tank, and the fecal sewage in the septic tank can be returned to the field for irrigation.

[0015] In the above rural domestic sewage resource treatment device, the bacterial agents in the hydrolysis acidification tank include Nitrosomonas, Nitrobacter, biological enzymes and nutrient agents, etc.

[0016] In the above rural domestic sewage resource treatment device, the ecological consumption pond adopts a small vegetable garden / small garden ecological consumption pond.

[0017] The advantages are as follows: The black water generated by the farmer's toilet and the gray water generated by the household kitchen, laundry, cleaning and bathing, etc. flow into the hydrolysis acidification tank together by gravity for combined enrichment storage and microbial treatment, then flow into the anaerobic purification tank by gravity, and the anaerobic treatment is carried out by using the microorganisms attached to the packing. Finally, it flows into the multi-media biological purification and ecological consumption pond by gravity for microbial soil infiltration treatment technology, which can improve the treatment effect of rural sewage, reduce costs, and at the same time mix and treat black water and gray water, which is convenient and practical. Description of the drawings

[0018] Figure 1 It is a flow chart of black and gray water mixed treatment in a rural domestic sewage resource treatment device proposed by the present invention.

[0019] Figure 2 It is a flow chart of black and gray separation (black water) in a rural domestic sewage resource treatment device proposed by the present invention.

[0020] Figure 3 It is a flow chart of black and gray separation (gray water) in a rural domestic sewage resource treatment device proposed by the present invention.

[0021] Figure 4 It is a layout diagram of black and gray water mixed treatment in a rural domestic sewage resource treatment device proposed by the present invention.

[0022] In the figure: 1 farmer household, 2 septic tank, 3 hydrolysis acidification tank, 4 oil separation well, 5 anaerobic purification tank, 6 ecological consumption pond. Specific implementation manner

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0024] Refer to Figures 1-4 , a rural domestic sewage resource treatment device, including a septic tank 2. The black water generated by the toilet of farmer household 1 flows into the septic tank 2 by gravity to remove impurities. A water distribution port is provided in the septic tank 2, and the fecal sewage in the septic tank 2 can be returned to the field for irrigation;

[0025] Hydrolysis acidification tank 3. Bacterial agents are pre-put into the hydrolysis acidification tank 3. The hydrolysis acidification tank 3 is connected to the septic tank 2 through a pipeline. The bacterial agents in the hydrolysis acidification tank 3 include nitrosomonas, nitrobacter, biological enzymes, nutrients, etc.;

[0026] Oil separation well 4. The grey water generated by the kitchen, laundry, cleaning, bathing, etc. in farmer household 1 is pretreated through the oil separation well 6. The oil separation well 4 and the septic tank 2 are respectively connected to the hydrolysis acidification tank 3 through pipelines;

[0027] Anaerobic purification tank 5. Microorganisms are attached to the fillers in the anaerobic purification tank 4. The hydrolysis acidification tank 3 is connected to the anaerobic purification tank 5 through a pipeline;

[0028] Ecological consumption pond 6. The ecological consumption pond 6 is connected to the anaerobic purification tank 5 through a pipeline. The ecological consumption pond 5 respectively includes a PAC membrane, green vegetation, soil and mixed fillers. An anti-seepage film is provided in the ecological consumption pond 6. The ecological consumption pond 6 adopts a small vegetable garden / small garden ecological consumption pond.

[0029] Among them, rural domestic sewage is divided into two parts: "black water (high-concentration domestic sewage generated by human excretion and flushing feces), grey water (sewage generated by the kitchen, laundry, cleaning and bathing sewage of residents' families)".

[0030] (1) For the black water part, the black water generated by the toilet of the farmer household flows into the three-compartment septic tank 1 by gravity to remove impurities and perform pretreatment, and then flows into the hydrolysis acidification tank 3 by gravity. After hydrolysis acidification, the biochemical performance is improved, and partial denitrification is carried out. In addition, there are more and more surfactants in domestic sewage, and hydrolysis acidification is beneficial to the degradation of such substances. Then it flows into the anaerobic purification tank 5. Under the action of anaerobic bacteria, the organic matter undergoes hydrolysis, acidification and methanation to remove the organic matter in the wastewater and reduce the concentration of COD. Finally, it flows into the multi-media biological purification and ecological consumption pond 6, and the tail water reaches the standard for discharge nearby after the multi-layer media filtration.

[0031] (2) Greywater part: The greywater generated from residents' household kitchens, laundry, cleaning, bathing, etc. flows by gravity into the oil separation well 4 to remove oil stains and impurities. Then, similar to the blackwater, it is treated by the hydrolysis acidification tank 3, anaerobic purification tank 5, multi-media biological purification and ecological absorption pond 6, and the treated effluent is discharged up to the standard nearby.

[0032] (3) Merging of black and grey water: The blackwater generated from the toilets of farmers 1 and the greywater generated from residents' household kitchens, laundry, cleaning, bathing, etc. jointly flow by gravity into the hydrolysis acidification tank 3 for merging and undergo microbial treatment with enriched storage; then flow by gravity into the anaerobic purification tank 5 for anaerobic treatment using the microorganisms attached to the fillers; then flow by gravity into the multi-media biological purification and ecological absorption pond 6 for treatment by the microbial soil infiltration treatment technology; and the treated effluent is discharged up to the standard nearby.

[0033] When the utility model is in use, the blackwater generated from the toilets of farmers 1 is pretreated by the septic tank 2, and the greywater generated from residents' household kitchens, laundry, cleaning, bathing, etc. is pretreated by the oil separation well 4, and then enter the hydrolysis acidification tank 3 separately or jointly. Bacterial agents purchased from the market, including nitrosomonas, nitrobacter, biological enzymes, nutrients, etc., have been pre-added to the hydrolysis acidification tank 3. Sewage usually contains high concentrations of organic substances such as proteins, fats, and carbohydrates. Once the wastewater enters the hydrolysis acidification tank 3, the microbial community begins to decompose the organic substances. First, the hydrolysis reaction occurs, and the complex organic substances are decomposed into simple organic substances such as fatty acids, amino acids, and sugars through the action of enzymes. The simple organic substances generated during the hydrolysis process will continue to be further degraded by the microorganisms. These simple organic substances are converted into volatile fatty acids (VFAs) such as acetic acid, propionic acid, and butyric acid by anaerobic bacteria. The degradation of VFAs further releases hydrogen and carbon dioxide, and the hydrogen and carbon dioxide generated undergo a methane formation reaction under the action of microorganisms to produce methane gas. After flowing by gravity into the anaerobic purification tank, the anaerobic reaction is carried out using the microorganisms attached to the fillers to reduce the contents of COD, BOD, and suspended solids, and finally it flows into the multi-media biological purification and ecological absorption pond 6. Among them, the ecological absorption pond 6 selects a small vegetable garden / small garden ecological absorption pond, and the effluent water quality of the "small vegetable garden treatment mode" can stably meet the requirements of different discharge standards such as the "Discharge Standard of Water Pollutants for Rural Domestic Sewage Treatment Facilities" (DB32 / 3462-2020), the "Rural Irrigation Standard" (GB5084-2021), and the "Discharge Standard of Water Pollutants for Rural Domestic Sewage Treatment Facilities in Jiangsu Province" (DB32 / 3462-2020);

[0034] At the same time, in the multi-media biological purification and ecological absorption pond 6, the sewage undergoes layer-by-layer filtration through the PAC membrane, green vegetation, soil, mixed fillers, etc., and the pollutants remaining after the previous processes are intercepted or adsorbed, so that the water quality meets various effluent water quality standards, and the treated effluent is discharged up to the standard nearby.

[0035] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, making equivalent substitutions or changes should be covered within the protection scope of the present utility model.

Claims

1. A device for recycling domestic sewage from rural residents, characterized in that: include: Septic tank (2), black water from the farmer's (1) toilet flows into the septic tank (2) to remove impurities; A hydrolysis and acidification tank (3), wherein a bacterial agent is pre-added into the hydrolysis and acidification tank (3), and the hydrolysis and acidification tank (3) is connected to the septic tank (2) via a pipeline; A grease trap (4), through which grey water generated by the farmer's (1) kitchen, laundry, cleaning and bathing is pre-treated, and the grease trap (4) and the septic tank (2) are respectively connected to the hydrolysis acidification tank (3) through pipelines; An anaerobic purification tank (5), wherein microorganisms are attached to a filler in the anaerobic purification tank (5), and the hydrolysis acidification tank (3) is connected to the anaerobic purification tank (5) via a pipeline; An ecological consumption pool (6), wherein the ecological consumption pool (6) is connected to the anaerobic purification tank (5) via a pipeline.

2. A rural domestic sewage resource treatment device according to claim 1, characterized in that: The ecological consumption pool (6) comprises a PAC membrane, green vegetation, soil and mixed filler.

3. A rural domestic sewage resource treatment device according to claim 1, characterized in that: An anti-seepage film is provided in the ecological consumption pool (6).

4. A rural domestic sewage resource treatment device according to claim 1, characterized in that: The septic tank (2) is provided with a water distribution port, so that the manure and sewage in the septic tank (2) can be returned to the fields for irrigation.

5. The device for recycling rural domestic sewage according to claim 1 is characterized in that: The bacterial agent in the hydrolysis and acidification tank (3) includes Nitrosomonas, Nitrobacter, biological enzymes and nutrients.

6. A rural domestic sewage resource treatment device according to claim 1, characterized in that: The ecological consumption pool (6) is a small vegetable garden / small flower garden ecological consumption pool.

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