Rural domestic grey water treatment device

Abstract

The embodiment of the utility model discloses a rural domestic grey water treatment device which comprises an oil separation filtering preprocessor, and a soil purification layer, a filler filtering layer and a water collection layer which are sequentially arranged in an open container from top to bottom, a water inlet is formed in the upper part of the oil separation filtering pretreater, and a water outlet communicated to the soil purification layer is formed in the lower part of the oil separation filtering pretreater; the soil purification layer is provided with soil for planting plants; the filler filtering layer is provided with filler for filtering, multiple layers of filler are stacked on the filler filtering layer from top to bottom, and the particle size of the filler located on the upper layer in the filler filtering layer is larger than that of the filler located on the lower layer; the water collecting layer is used for collecting the purified grey water, and the water collecting layer is provided with a purified water outlet. According to the embodiment of the invention, the geographical environment characteristics of mountainous and dispersed villages are combined, the domestic grey water is treated in a single-family or multi-family small-concentration manner, a three-dimensional ecological system environment of plants, soil and a filter layer is established, and organic matters, nitrogen, phosphorus and other nutrient substances in the domestic grey water are absorbed and decomposed, so that the aim of purifying the water quality of the grey water is fulfilled; the device has the advantages and characteristics of low cost, easiness in operation, no additional occupied area, easiness in maintenance and good effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of grey water treatment, in particular to a rural domestic grey water treatment device. BACKGROUND

[0002] The courtyards in mountainous and scattered rural areas have more open spaces in front of houses and behind houses, and gardens and fields are arranged around the courtyard walls. The domestic grey water generated by residents in daily life mainly includes washing sewage, bathing wastewater and kitchen wastewater, which is characterized by black and grey separation, small amount of grey water and low concentration of pollutants.

[0003] The common problems existing in the treatment of domestic grey water in mountainous and scattered rural areas are as follows: 1. The villages are scattered, and the villagers live more dispersedly; 2. The distance of centralized collection of sewage is far, the construction is difficult, and the construction and operation cost is high; 3. The old houses cannot meet the requirements of water inlet; 4. The treatment process is complicated, the cost of per ton of water treatment is high, the benefit is low, and the rectification is difficult; 5. The centralized treatment technology of sewage forms a “point source” discharge, which affects the surface water, and at the same time, lengthens the natural circulation chain of soil water, and increases the evaporation of soil water and the burden of groundwater recharge.

[0004] In the prior art, the technical solutions for treating domestic sewage in rural areas mainly include biological treatment technology, physical treatment technology, chemical treatment technology, combined treatment technology, land treatment technology, ecological engineering technology, and centralized treatment combined with decentralized treatment. The above technical solutions have been mature, but each has defects such as high construction cost, large occupied area, difficulty in laying sewage pipe network, high daily operation and maintenance technical requirements, high operation cost, and low utilization degree of sewage resources, which cannot be applied to the treatment of domestic grey water in mountainous and scattered rural areas. CONTENT OF THE INVENTION

[0005] In order to solve at least one problem mentioned in the background art, the present application provides a rural domestic grey water treatment device, which combines the geographical environmental characteristics of mountainous and scattered rural areas, treats domestic grey water by single household or small centralized treatment of multiple households, establishes a three-dimensional ecological system environment of plants + soil + filter layer, absorbs and decomposes organic matter and nutrients such as nitrogen and phosphorus in domestic grey water, so as to achieve the purpose of purifying grey water quality, and has the advantages of low cost, easy operation, no additional land occupation, good maintenance and good effect.

[0006] In order to achieve the above purpose, the present application provides a rural domestic grey water treatment device, which comprises an oil separation and filtration pretreater, and a soil purification layer, a filler filter layer and a water collecting layer arranged in the open container from top to bottom.

[0007] The upper portion of the oil separation and filtration pre-treater is provided with an inlet, and the lower portion of the oil separation and filtration pre-treater is provided with an outlet connected to the soil purification layer.

[0008] The soil purification layer has soil for planting plants.

[0009] The filler filtration layer has fillers for filtration, and the filler filtration layer is stacked with multiple layers of fillers from top to bottom. The particle size of the filler in the upper layer is greater than that of the filler in the lower layer.

[0010] The water collection layer is used to collect purified grey water, and the water collection layer is provided with a purified water outlet.

[0011] In an implementable embodiment, the oil separation and filtration pre-treater includes an open-top pre-treater shell, multiple vertically arranged baffles with decreasing heights in the pre-treater shell, and multiple sequentially connected sedimentation chambers divided by the baffles. The upper portion of the sedimentation chamber with the largest depth is open to form the inlet of the oil separation and filtration pre-treater, and the lower portion of the sedimentation chamber with the smallest depth is provided with the outlet of the oil separation and filtration pre-treater.

[0012] In an implementable embodiment, the inlet of the oil separation and filtration pre-treater is provided with an oil separation filter screen, and the outlet of the oil separation and filtration pre-treater is provided with multiple outlets.

[0013] In an implementable embodiment, the oil separation and filtration pre-treater is arranged on the upper surface of the soil purification layer, the upper surface of the oil separation and filtration pre-treater is provided with an inlet, and the lower surface is provided with an outlet.

[0014] Alternatively, the oil separation and filtration pre-treater is arranged at a designated position, the inlet of the oil separation and filtration pre-treater is connected to the drain of the grey water source through an inlet pipeline, and the outlet of the oil separation and filtration pre-treater is connected to the upper surface of the soil purification layer through an outlet pipeline.

[0015] In an implementable embodiment, the soil purification layer is planted with plants with developed roots and stems.

[0016] In an implementable embodiment, the fillers in the filler filtration layer include mineral sand with a diameter of 0.01 cm to 2 cm, sawdust, construction waste with a particle diameter of 2 cm to 4 cm, zeolite with a diameter of 1 cm to 2 cm, ceramic balls, activated carbon, or corn cobs.

[0017] In an implementable embodiment, the open container is provided with a drawer corresponding to one side of the filler filtration layer, and the drawer enters and exits the open container through the drawer opening.

[0018] In an implementable embodiment, the lower part of the filler filter layer is provided with multiple layers of screens, and the filler layers in the lower part are filled between adjacent screens.

[0019] In an implementable embodiment, a ball valve is arranged at the water outlet of the water collecting layer.

[0020] In an implementable embodiment, the thickness of the soil purification layer is 30-40 cm, the height of each layer of filler in the filler filter layer is 10-20 cm, and the height of the water collecting layer is 14-16 cm.

[0021] The embodiment of the present application provides a rural domestic grey water treatment device, which comprises an oil separation and filtration pre-treater, and a soil purification layer, a filler filter layer and a water collecting layer arranged in the open container in sequence from top to bottom. The oil separation and filtration pre-treater is used to filter grease, food residues and the like in the catering grey water, so as to avoid clogging the soil purification layer and the filler filter layer and avoid or reduce the emission of odor of putrefactive substances. The soil of the soil purification layer is obtained from the ground in the courtyard of the rural residents and can be sandy soil or sandy clay. The soil purification layer utilizes the adsorption, decomposition, migration and transformation of the soil itself to further purify the domestic grey water and reduce the concentration of pollutants. The soil purification layer is planted with plants such as flowers, grasses and vegetables with developed root systems, which absorb nutrients and water in the grey water by using the plant root systems. The filler filter layer is layered and laid from top to bottom according to the particle size from large to small, which is mainly used for adsorption and filtration of organic matters and nutrients such as nitrogen and phosphorus in the grey water. The water collecting layer collects the purified grey water, which is used for water replenishment in vegetable gardens, orchards and gardens or is led out by pipes to a water storage tank, which can be used for dust suppression by sweeping in the courtyard and street, road and lane greening and fire-fighting water and the like, so as to realize water resource recycling.

[0022] The embodiment of the present application is combined with the geographical environmental characteristics of mountainous and scattered rural areas, which can treat domestic grey water by single household or small-scale centralized treatment of multiple households, utilize the self-purification capacity of the planted plants and soil system, simultaneously set filler infiltration at the bottom of the two systems, establish an ecological system environment of plants+soil+filter layer, absorb and decompose organic matters and nutrients such as nitrogen and phosphorus in the domestic grey water, so as to achieve the purpose of purifying the grey water quality, replenish the underground water environment and realize resource utilization, which has the advantages of low cost, easy operation, no additional land occupation, good maintenance, good effect and the like. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative labor.

[0024] Figure 1 A structural schematic diagram of a rural domestic grey water treatment device provided by an embodiment of the present application is shown.

[0025] Explanation of reference numerals:

[0026] 100 - rural domestic grey water treatment device

[0027] 110 - oil separation and filtration pre-treater; 111 - pre-treatment housing; 112 - partition

[0028] 120 - open container

[0029] 130 - plant layer

[0030] 140 - soil purification layer

[0031] 150 - filler filtration layer; 151 - screen

[0032] 160 - water collection layer; 161 - purified water outlet DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the drawings in the embodiments of the present application. It should be noted that the embodiments described in the drawings are only some of the embodiments of the present application, not all the embodiments. That is, the embodiments described by the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0034] The following will be described in conjunction with Figure 1 A domestic grey water treatment device provided by an embodiment of the present application is described.

[0035] The present embodiment provides a domestic grey water treatment device, which comprises an oil separation and filtration pre-treater 110, and a soil purification layer 140, a filler filtration layer 150 and a water collection layer 160 which are sequentially connected from top to bottom in an open container 120.

[0036] The upper part of the oil separation and filtration pre-treater 110 is provided with a water inlet, and the lower part of the oil separation and filtration pre-treater 110 is provided with a water outlet which is connected to the soil purification layer 140.

[0037] The soil purification layer 140 has soil for planting plants.

[0038] The filler filtration layer 150 has fillers for filtration, and the filler filtration layer 150 is provided with multiple layers of fillers stacked from top to bottom, and the particle size of the fillers located in the upper layer is greater than the particle size of the fillers located in the lower layer.

[0039] The water collection layer 160 is used for collecting the purified grey water, and the water collection layer 160 is provided with a purified water outlet 161.

[0040] The oil separation filter pretreater 110 is used to filter oil, food residues and the like in the catering grey water, so as to avoid clogging of the soil purification layer 140 and the filler filter layer 150 and to avoid or reduce the emission of odors by putrefactive substances.

[0041] The soil of the soil purification layer 140 is obtained from the ground in the courtyard of a rural resident and can be sandy soil or sandy clay. The soil purification layer 140 is used to further purify the domestic grey water by using the adsorption, decomposition, migration and transformation of the soil itself to reduce the concentration of pollutants. The soil purification layer 140 is planted with plants such as flowers, grasses and vegetables with developed root systems to form a plant layer 130, which is used to absorb nutrients and water in the grey water by the root systems of the plants.

[0042] The filler filter layer 150 is layered from top to bottom according to the particle size from large to small and is mainly used to adsorb and filter organic matter and nutrients such as nitrogen and phosphorus in the grey water.

[0043] The water collecting layer 160 collects the purified grey water and is used for water replenishment of a vegetable garden, an orchard, a flower garden and the like, or is led out by a pipeline to a water storage tank and can be used for dust suppression by sweeping, road and lane greening and fire-fighting water and the like, so as to realize water resource recycling.

[0044] A grid can be arranged between the soil purification layer 140, the filler filter layer 150 and the water collecting layer 160 to facilitate the flow of the grey water among them and to prevent clogging of the lower layer.

[0045] The embodiment of the present application is combined with the geographical environmental characteristics of mountainous and scattered rural areas. Single or multiple small centralized treatment of domestic grey water can be adopted. The self-purification capacity of the planted plants and the soil system is used. The filler infiltration is arranged at the bottom of the two systems. The ecological system environment of plants + soil + filter layer is established to absorb and decompose organic matter and nutrients such as nitrogen and phosphorus in the domestic grey water, so as to achieve the purpose of purifying the grey water quality, replenish the groundwater environment and realize resource utilization. The embodiment has the advantages of low cost, easy operation, no additional land occupation, good maintenance, good effect and the like.

[0046] The embodiment of the present application is suitable for reserved and improved villages or non-environmentally sensitive area villages with a small resident population (permanent households ≤ 300) and a per capita grey water production and discharge of less than 30 L / d. The embodiment can be placed in the courtyard of a farmer. A low-cost, easy-to-manage and low-energy-consumption ecological process is used for low-concentration grey water. The treated and purified grey water is preferentially used for irrigation of small vegetable gardens, small orchards, small flower gardens, farmland, woodland and grassland and the like, dust suppression by sweeping of courtyards and streets and greening of roads and lanes and the like. The embodiment avoids the adverse effects of random spattering of domestic grey water by rural residents, such as generation of odors, breeding of mosquitoes and flies and poor appearance and the like. The embodiment realizes low-cost ecological batch and controlled consumption and treatment.

[0047] The embodiment of the application is based on the sustainable ecological recycling function of rural areas, strengthens the comprehensive benefits of resource utilization of the treated rural domestic grey water, fully utilizes the environmental carrying capacity of rural areas, combines the construction of treatment facilities with the planting and landscape greening requirements of rural areas, and realizes the ecological treatment of rural grey water by using low-cost ecological measures to minimize the influence of facility construction on regional ecology, water conservation and soil conservation.

[0048] In an implementable embodiment, the oil separation and filtration pretreater 110 comprises an open-top pretreatment shell 111, a plurality of height-decreasing baffles 112 are vertically arranged in the pretreatment shell 111, and the plurality of baffles 112 separate the pretreater shell into sequentially connected depth-decreasing sedimentation chambers. The upper part of the sedimentation chamber with the largest depth is open to form the water inlet of the oil separation and filtration pretreater 110, and the lower part of the sedimentation chamber with the smallest depth is provided with the water outlet of the oil separation and filtration pretreater 110.

[0049] In this way, the domestic grey water can be preliminarily purified step by step through the sequentially connected sedimentation chambers to realize the pretreatment of the domestic grey water.

[0050] In an implementable embodiment, an oil separation filter screen is arranged at the water inlet of the oil separation and filtration pretreater 110, and a plurality of water outlets are arranged at the water outlet of the oil separation and filtration pretreater 110.

[0051] In this way, the kitchen waste, leaves, residues, oil, sundries and the like can be effectively filtered through the oil separation filter screen to avoid the clogging of the infiltration layer medium, and the soil purification layer 140 can be uniformly watered through the uniformly distributed water outlets.

[0052] In some embodiments, the rural residents can choose to replace the oil separation filter screen with household appliances such as a strainer and the like, and replace them regularly. A plurality of oil separation and filtration pretreaters 110 can be uniformly distributed around the soil purification layer 140 to uniformly distribute water.

[0053] In an implementable embodiment, the oil separation and filtration pretreater 110 is arranged on the upper surface of the soil purification layer 140, the upper surface of the oil separation and filtration pretreater 110 is provided with the water inlet, and the lower surface is provided with the water outlet.

[0054] Alternatively, the oil separation and filtration pretreater 110 is arranged at a specified position, the water inlet of the oil separation and filtration pretreater 110 is connected to the drain of the domestic grey water source through a water inlet pipeline, and the water outlet of the oil separation and filtration pretreater 110 is connected to the upper surface of the soil purification layer 140 through a water outlet pipeline.

[0055] In this way, rural residents can directly pour the domestic grey water into the water inlet of the oil separation and filtration pre-treater 110 on the upper surface of the soil purification layer 140 according to the actual demand, or collect the domestic grey water through the water inlet pipe to the oil separation and filtration pre-treater 110, and then connect to the soil purification layer 140 through the water outlet pipe, and then perform the grey water purification treatment through the rural domestic grey water treatment device 100.

[0056] In an implementable embodiment, the soil purification layer 140 plants root-developed flowers, grasses or vegetables.

[0057] Among them, the annual landscape plants such as dwarf grass, sunflower, trumpet flower, and amaranth are selected and planted under the condition that the outdoor temperature is suitable, and fast-growing vegetables such as coriander and lettuce can be planted in the indoor area with less population, and 20-30 clusters (plants) per square meter of crops are planted, the plant root system is used to absorb the nutrients and water in the grey water, the excess root system can be removed by regular plowing of the filter material layer, and the risk of heavy metal enrichment and the risk of plant root system blocking the filter material are reduced.

[0058] In an implementable embodiment, the filter material in the filter material layer 150 includes mineral sandstone with a diameter of 0.01 cm-2 cm, sawdust, construction waste with a particle diameter of 2 cm-4 cm, zeolite with a diameter of 1 cm-2 cm, ceramsite, activated carbon or corn cob.

[0059] In this way, the filter material layer selects low-cost and easily available materials with strong adsorption according to the particle size from large to small from top to bottom, and adsorbs and filters organic matter and nutrients such as nitrogen and phosphorus in the grey water, and the filter layer volume is determined according to the size of the household and the water use habit.

[0060] In an implementable embodiment, the open container 120 is provided with a suction port corresponding to one side of the filter material layer 150, the filter material layer 150 is arranged in the drawer type container, and the drawer type container is in and out of the open container 120 through the suction port.

[0061] In this way, the drawer type container can be pulled in and out of the open container 120, which is convenient for regular cleaning and replacement of the filter material layer 150.

[0062] In an implementable embodiment, the lower part of the filter material layer 150 is provided with a plurality of screen meshes 151, and the filter material located in the lower part is layered and filled between adjacent screen meshes 151.

[0063] Among them, the upper part of the drawer type container is arranged to be open, and the lower part is arranged with filter screen meshes 151, the mesh size is arranged according to the particle diameter of the filter material, and for the filter material with smaller particle diameter, a 5 cm×5 cm grid can be installed inside the drawer type container, which can avoid the small particle diameter filter material from being washed and gathered with the downward water flow.

[0064] In an implementable embodiment, a ball valve is arranged at the water outlet of the water collecting layer 160.

[0065] In this way, the water outlet is arranged with a ball valve to control water outlet, and a water drainage hose can be connected to recycle the purified grey water.

[0066] In an implementable embodiment, the thickness of the soil purification layer 140 is 30-40 cm, the height of each filler layer of the filler filtration layer 150 is 10-20 cm, and the height of the water collecting layer 160 is 14-16 cm.

[0067] In this way, the thickness of the soil purification layer 140 is arranged to facilitate the planting of plants, the height of the filler filtration layer 150 is arranged to facilitate better purification and filtration, and the height of the water collecting layer 160 is arranged according to actual conditions, and the outer side of the water collecting layer 160 can be connected to a water tank for temporary water storage.

[0068] It should be noted that, unless otherwise explicitly specified and limited, in the description of the present application, the terms "mounting", "connection", "linking" should be understood in a broad sense, for example, can be fixedly connected, can be indirectly connected through an intermediate medium, can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0069] The terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0070] The term "a plurality of" means two or more, unless otherwise explicitly specified and limited.

[0071] The terms "first", "second", "third", "fourth" and the like (if any) are used to distinguish similar objects, and do not necessarily have to describe a particular order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can include orders other than those illustrated or described herein.

[0072] The terms "comprises", "comprising", "includes", "including", "has", "having" and their conjugates mean "including but not limited to", and are used in the inclusive rather than the exclusive sense; that is; a process, method, object, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements but can include other not expressly listed steps or elements.

[0073] Finally, it should be noted that the above embodiments are merely used for describing, but not limiting the technical solutions of the present application; even though the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some or all of the technical features can be replaced equivalently; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A rural domestic greywater treatment device, characterized in that, It includes an oil-water separation and filtration pre-processor, and a soil purification layer, a filler filter layer, and a water collection layer arranged sequentially from top to bottom inside an open container; The oil-water pre-processor has an inlet at its upper part and an outlet at its lower part that connects to the soil purification layer. The soil purification layer has soil suitable for planting plants; The packing filter layer has packing material for filtration, and the packing filter layer has multiple layers of packing material stacked from top to bottom. The particle size of the packing material in the upper layer of the packing filter layer is larger than that of the packing material in the lower layer. The water collection layer is used to collect the purified grey water, and the water collection layer is provided with a purified water outlet. The oil-water separation filter pre-processor includes a pre-processing shell with an open top. Multiple partitions with decreasing heights are vertically arranged inside the pre-processing shell. The multiple partitions divide the pre-processor shell into sedimentation chambers that are connected in sequence. The upper opening of the sedimentation chamber with the greatest depth forms the water inlet of the oil-water separation filter pre-processor, and the lower part of the sedimentation chamber with the least depth forms the water outlet of the oil-water separation filter pre-processor. The oil-water pre-processor is provided with an oil-water filter screen at its inlet and has multiple outlets. The filler material in the filter layer includes one of the following: mineral sand and gravel with a diameter of 0.01 cm to 2 cm, wood chips, construction waste with a particle diameter of 2 cm to 4 cm, zeolite with a diameter of 1 cm to 2 cm, ceramsite, activated carbon, or corn cob. The open container has a drawer opening on one side corresponding to the packing filter layer. The packing filter layer is disposed inside the drawer-type container, and the drawer-type container enters and exits the open container through the drawer opening.

2. The rural domestic greywater treatment device according to claim 1, characterized in that, The oil-water separation filter pre-processor is disposed on the upper surface of the soil purification layer, with an inlet on the upper surface and an outlet on the lower surface. Alternatively, the oil-water pre-processor is positioned at a set location, and the inlet of the oil-water pre-processor is connected to the outlet of the domestic greywater source via an inlet pipe, while the outlet of the oil-water pre-processor is connected to the upper surface of the soil purification layer via an outlet pipe.

3. The rural domestic greywater treatment device according to claim 1 or 2, characterized in that, The soil purification layer is planted with flowers or vegetables with well-developed root systems.

4. The rural domestic greywater treatment device according to claim 1 or 2, characterized in that, The lower part of the filler filter layer is provided with multiple layers of screens, and the filler material in the lower part is layered and filled between adjacent screens.

5. The rural domestic greywater treatment device according to claim 1 or 2, characterized in that, A ball valve is installed at the drain outlet of the water collection layer.

6. The rural domestic greywater treatment device according to claim 1 or 2, characterized in that, The soil purification layer is 30-40cm thick, the filler filter layer has a filler height of 10cm-20cm per layer, and the water collection layer has a height of 14cm-16cm.

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