CN114605037B - Rural grey water cyclic utilization integration processing system - Google Patents
Rural grey water cyclic utilization integration processing system Download PDFInfo
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- CN114605037B CN114605037B CN202210292810.3A CN202210292810A CN114605037B CN 114605037 B CN114605037 B CN 114605037B CN 202210292810 A CN202210292810 A CN 202210292810A CN 114605037 B CN114605037 B CN 114605037B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1268—Membrane bioreactor systems
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
Abstract
The invention discloses an integrated treatment system for rural gray water recycling, which comprises an intensified pretreatment tank, a drop water tank, a multi-effect filter tank, a disinfection tank, a water inlet pipe, a water outlet pipe and a gas distribution pipe; wherein the strengthening pretreatment tank is cylindrical; the falling water tank is arranged in a closed ring along the reinforced pretreatment tank wall; the multi-effect filter tank is arranged below the drop tank in a semi-annular shape along the reinforced pretreatment tank wall; the disinfection tank is arranged below the water drop tank in a semi-annular shape along the reinforced pretreatment tank wall and is arranged in a closed annular shape with the multi-effect filter tank; the water inlet pipe is arranged at the bottom of the reinforced pretreatment tank; the water outlet pipe is arranged at the bottom of the disinfection tank; the gas distribution pipe is arranged in the middle of the multi-effect filter tank in a semi-annular shape along the multi-effect filter tank, and two ports of the gas distribution pipe are respectively communicated with the atmosphere of the disinfection tank. The filter tank is of an annular structure, so that uniform water distribution of the filter tank is realized, and dead angles are avoided; the system has no power consumption, is simple to maintain and manage, adopts an integrated structural form, is convenient to carry and install, and has higher environmental benefit and economic benefit.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to an integrated treatment system for recycling rural grey water.
Background
With the increasing importance of countries on rural domestic sewage treatment, china has made great progress in rural domestic sewage treatment technology research and development, standard policy formulation and project implementation, but most of the countries mainly discharge after reaching standards. Experience shows that the pure pursuit of standard emission does not accord with the actual situation in rural areas.
In the treatment mode, the rural domestic sewage is mainly treated by mixing black water and gray water. The rural domestic grey water refers to low-concentration domestic sewage generated by daily cleaning, kitchen cleaning, bathing, washing and the like of rural resident families. In the whole treatment process, high-concentration water such as human excrement and urine is diluted by grey water of low-concentration water such as kitchen water, bath washing water and the like, and the grey water with low concentration of original pollutants is polluted, so that the treatment difficulty is increased, and the cost is increased.
In recent years, the concepts of sewage quality-dividing treatment and resource utilization are deepened continuously, and in areas meeting the conditions, the independent collection treatment of the grey water with larger production can better realize the recycling of water resources, reduce the cost and meet the actual requirements of rural domestic sewage treatment in China.
Existing grey water treatment techniques include physical treatment techniques, chemical treatment techniques, biological treatment techniques, and ecological treatment techniques. Wherein, the physical treatment mainly adopts sand filter and membrane filtration technology; the chemical treatment mainly adopts flocculation and precipitation technology; the biological treatment mainly adopts a biological membrane method, such as a contact oxidation method, a biological aerated filter, an MBBR and other technologies; the ecological treatment mainly adopts modes such as artificial wetland, ecological filter tank, soil infiltration and the like.
However, the existing grey water treatment technology has the following problems:
1. physical treatment technology: the simple sand filter treatment technology is easy to cause filter blockage, needs regular back flushing and has high operation and maintenance cost; although the membrane filtration technology has good treatment effect, the one-time investment and operation and maintenance cost is high, the level requirement on operation and maintenance personnel is relatively high, and the membrane filtration technology is difficult to operate for a long time in rural areas with undeveloped economy.
2. Chemical treatment technology: the method mainly removes pollutants in a medicament adding mode, has high operation cost, and has large chemical sludge amount generated in the operation process, difficult treatment and easy secondary pollution.
3. Biological treatment technology: the requirement on aeration rate is high, the domestic sewage with low concentration is not easy to form a biological film, the active organisms are difficult to control manually, and the flexibility of operation and maintenance is poor.
4. Ecological treatment technology: the construction operation cost is low, the maintenance management is relatively simple, the method is suitable for the rural sewage treatment characteristics of China, the method is generally combined with biological treatment technology in actual engineering to achieve better treatment effect, but the pollutant treatment load of the ecological treatment technology is low, the occupied area is large, and the method has limitation on rural areas with intense land.
5. At present, most of the treatment modes of the rural grey water in China are discharged after treatment or used for irrigation, and the irrigation has seasonality, so that the problems of water resource waste, secondary pollution to surrounding environment and the like exist in non-irrigation seasons.
6. The current rural domestic sewage treatment technology basically has no disinfection link, and the condition of the discharged escherichia coli is basically not monitored, so that the technology has potential safety risk from the recycling perspective.
7. The existing rural domestic sewage treatment equipment mainly discharges the sewage after reaching the standard, efficiently removes pollutants, has the problem of energy waste for most rural areas with recycling requirements, and is not in compliance with the existing sewage low-carbon treatment requirements.
Therefore, how to develop a rural gray water recycling integrated treatment system with low operation cost and simple maintenance and management, which accords with the rural characteristics of China, is a problem which needs to be solved by the technicians in the field.
Disclosure of Invention
Therefore, the invention aims to provide an integrated treatment system for recycling rural grey water, and the recycling way of the treated sewage is mainly used for farmland, green land irrigation and living miscellaneous use.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
an integrated treatment system for rural gray water recycling comprises an intensified pretreatment tank, a drop water tank, a multi-effect filter tank, a disinfection tank, a water inlet pipe, a water outlet pipe and a gas distribution pipe; wherein, the liquid crystal display device comprises a liquid crystal display device,
the strengthening pretreatment pool is cylindrical;
the drop water tank is arranged in a closed ring shape along the reinforced pretreatment tank wall, and the highest position of the drop water tank is lower than the reinforced pretreatment tank;
the multi-effect filter tank is arranged below the drop tank in a semi-annular shape along the reinforced pretreatment tank wall, and the width of the multi-effect filter tank is twice the width of the drop tank;
the disinfection tank is arranged below the water drop tank in a semi-annular shape along the reinforced pretreatment tank wall, is arranged in a closed annular shape with the multi-effect filter tank, and the height of the water drop tank wall above the disinfection tank is higher than that of the reinforced pretreatment tank; a slow-release chlorine tablet is arranged in the disinfection tank;
the water inlet pipe is arranged at the bottom of the reinforced pretreatment tank;
the water outlet pipe is arranged at the bottom of the disinfection tank;
the gas distribution pipe is arranged in the middle of the multi-effect filter tank in a semi-annular shape along the multi-effect filter tank, and two ports of the gas distribution pipe are respectively communicated with the atmosphere of the disinfection tank.
The beneficial effects of the invention are as follows:
1. the invention adopts a cylindrical tank body as a whole through ingenious structural design, adopts a cylindrical double-layer structure, optimizes and integrates the strengthening pretreatment tank, the water drop tank, the multi-effect filter tank and the disinfection tank, and simultaneously improves the reoxygenation capability of the system in a multi-effect filter tank packing layer by assisting a wind distribution pipe natural reoxygenation mode, thereby forming an integrated treatment system which is convenient to install and occupies a small area.
2. The filter tank is of an annular structure, so that uniform water distribution of the filter tank can be realized, and no dead angle exists; the system has no power consumption, is simple to maintain and manage, adopts an integrated structural form, is convenient to carry and install, and has higher environmental benefit and economic benefit.
3. The integrated treatment system can be used for industrial production, greatly shortens the construction period, has the characteristics of low construction and operation cost, convenient installation, simple maintenance and management and small occupied area, and is suitable for rural areas with deficient water resources and scattered living.
4. The invention adopts the process of strengthening pretreatment, unpowered oxygenation, multi-effect filtering tank and disinfection to treat the grey water in rural domestic sewage, the effluent meets the requirements of farmland, green land irrigation and living miscellaneous use, the system has no power consumption, the recycling of rural domestic sewage resources is realized, and the pollution reduction and carbon reduction of the sewage treatment industry are promoted.
5. The sewage enters from the bottom of the center layer, and falls off through the water fall in the process of flowing from the upper part of the center layer to the outer layer, so that unpowered oxygenation is realized, and the operation cost is low.
6. The drop water tank is annular, has two functions: firstly, the water falls and oxygenizes, water overflows uniformly from the periphery of the strengthening pretreatment tank, flows into the water fall tank along the tank wall, and on one hand, the water fall current takes the form of a water curtain in the falling process, so that the contact area of the water current and air is increased, and the reoxygenation effect is improved; on the other hand, oxygen is dissolved into the water flow in the process of falling of the water flow, and finally, the splash splashed at the moment of falling into the water falling pool also brings in the oxygen; secondly, the uniform water distribution of the multi-effect filter tank is ensured, under the condition that the single wide water volume of the water outlet of the strengthening pretreatment tank is small, water flows along the tank wall, the uniform water distribution of the multi-effect filter tank is not facilitated, and the water outlet of the water drop tank is ensured to fall into a water distribution channel positioned in the middle of the multi-effect filter tank by reasonably designing the width of the water drop tank. The part of the wall of the drop tank on the disinfection tank is made to be ultra-high, so that the water outlet is ensured not to drop into the disinfection tank.
7. The effluent of the multi-effect filter pool automatically flows into a disinfection pool, and the water level of the disinfection pool is not higher than the height of the multi-effect filter pool filler under-layer filler, so as to avoid anaerobic reaction at the bottom of the multi-effect filter pool and influence the water quality of the effluent. The escherichia coli is a strict control index of the water consumption of the miscellaneous water, the slow-release chlorine tablet is arranged in the disinfection tank according to the water outlet requirement, the contact time of at least 15min is ensured, the escherichia coli in the sewage is removed, and the water quality of the water outlet meets the requirements of farmland, green land irrigation and household miscellaneous use.
Further, the rural ash water recycling integrated treatment system further comprises a fixing frame, elastic fillers, an effluent weir, a top cover of the strengthening pretreatment tank and a mud pipe of the strengthening pretreatment tank, wherein the fixing frame is arranged in the strengthening pretreatment tank, the elastic fillers are fixed on the fixing frame, the effluent weir is arranged around the strengthening pretreatment tank and communicated with the water fall tank, the top cover of the strengthening pretreatment tank is arranged at the top of the strengthening pretreatment tank, and the mud pipe of the strengthening pretreatment tank is arranged at the bottom of the strengthening pretreatment tank.
The reinforced pretreatment tank is provided with the elastic filler, has large specific surface area and is easy for microorganism to adhere and grow; the design of the peripheral water outlet structure can realize high-efficiency drop aeration; the sludge in the strengthening pretreatment tank is pumped and transported outwards periodically through a sludge discharge pipe of the strengthening pretreatment tank and a movable pump.
The strengthening pretreatment unit is used as a pretreatment unit of a subsequent multi-effect filter tank, longer residence time is set, and the strengthening pretreatment unit mainly has four aspects: firstly, precipitation, namely, reducing the SS concentration of effluent by reducing the upward flow rate of sewage and settling suspended matters into the bottom of a tank, so as to prevent the blockage of a subsequent multi-effect filter; secondly, the impact load resistance effect is achieved, rural domestic sewage is characterized in that the fluctuation of water quality and water quantity is large, and the impact load resistance capability of the system is improved through long-time strengthening pretreatment; thirdly, degrading organic matters, and reducing the pollutant load of a subsequent multi-effect filter tank by strengthening the treatment of the pretreatment tank and reducing the concentration of the organic matters in the sewage; and fourthly, providing conditions for the subsequent drop aeration.
Furthermore, the rural ash water recycling integrated treatment system also comprises a water distribution channel, an adjustable fixing rod and a detachable bolt, wherein the water distribution channel is annularly arranged at the middle position above the multi-effect filter tank through the adjustable fixing rod; still further, still include detachable bolt the water distribution canal adopts detachable installation to through detachable bolt connection.
The water outlet of the strengthening pretreatment tank is in the form of an overflow weir, flows into the water drop tank along the tank wall, and then falls into the water distribution channel through the water drop tank. The water dropping pool and the water distribution channel are both of annular structures, the water outlet of the water distribution channel is in the form of a triangular weir, the water distribution channel is detachable in sections and is connected with the pool wall of the multi-effect filter pool through an adjustable fixing rod, and the water distribution channel is ensured to be horizontal. The purpose of the detachable installation of the water distribution channel is to ensure that the multi-effect filter is convenient to overhaul. The main functions of the water distribution channel are as follows: firstly, distributing water, wherein the water discharged from a water falling pond falls into a water distribution channel, and uniformly discharging water from two sides of the water distribution channel to a multi-effect filter tank so as to ensure uniform water distribution; secondly, the phenomenon that the surface of the filler is uneven and the water distribution is uneven due to the fact that the water drops impact the filler on the surface of the multi-effect filter tank is prevented; thirdly, the water distribution channel keeps a certain water level, and the drop aeration effect is better.
Further, the multi-effect filter is sequentially provided with a protective layer, a high-efficiency treatment layer, a transition layer and a water outlet supporting layer from top to bottom.
The technical scheme has the advantages that physical and biological reactions occur in the multi-effect filter, the physical reactions mainly comprise filtering, interception and adsorption of the filler, the biological reactions mainly comprise biological films formed on the surfaces of the filler, pollutants are biologically degraded by aerobic microbial flora, so that ammonia nitrogen is effectively removed, and the ammonia nitrogen is converted into nitrate nitrogen through nitrification of nitrifying bacteria under the aerobic condition. The multi-effect filter tank has the main functions of removing organic matters and ammonia nitrogen, and optimizing the growth environment of microorganisms by scientifically proportioning the proportion of natural river sand, zeolite and limestone.
Furthermore, the fillers of the protective layer and the transition layer are natural river sand; further, the grain size of the natural river sand is 0.5-1.6mm.
The technical scheme has the beneficial effects that the protective layer mainly protects the high-efficiency treatment layer, and the filler loss of the high-efficiency treatment layer is avoided in the daily maintenance process, so that the treatment effect is influenced. The protective layer filler is single filler natural river sand, is convenient to replace, and plays a role in preliminary filtration; the main function of the transition layer is to effectively connect with the water outlet supporting layer, prevent the filler of the high-efficiency treatment layer from losing, and play a role in further filtration.
Further, the filler of the high-efficiency treatment layer is at least one of zeolite, limestone and natural river sand; further, the grain size of zeolite, limestone and natural river sand is 0.8-4mm.
The technical scheme has the beneficial effects that the filler of the high-efficiency treatment layer is economical and easy to obtain and is mixed according to different proportions.
Further, the filler of the water outlet supporting layer is cobblestone; further, the cobble has a particle size of 2-32mm.
The beneficial effect of adopting the further technical scheme is that the main function of the water outlet supporting layer is to support the filler of the whole multi-effect filter system and prevent the filler from losing with water flow from the system.
Furthermore, the rural gray water recycling integrated treatment system also comprises a hood, wherein the hood is arranged at the port of the air distribution pipe, and the two ends of the air distribution pipe form a height difference of 30-80 cm; further, the air distribution pipe and the water flow are provided with air holes in the direction of 45 degrees, and the aperture of the air holes is smaller than the minimum particle size of the filler of the high-efficiency treatment layer.
The adoption of the further technical scheme has the beneficial effects that the gas distribution pipe can provide sufficient oxygen for the multi-effect filter tank, and promote the efficient removal of organic matters and ammonia nitrogen. The main function of the air distribution pipe is to create a better aerobic environment for the multi-effect filter under the condition of low activity of flora in winter, promote the efficient removal of organic matters and ammonia nitrogen and ensure the requirement of the water quality of reuse water.
Compared with the prior art, the invention provides an integrated treatment system for recycling rural grey water, solves the problem of grey water resource utilization in rural domestic sewage according to the concept of quality-based treatment, forms integrated equipment, reduces occupied area, has no energy consumption, has simple operation and maintenance, and provides ideas and technical support for rural domestic sewage treatment. The specific aspects are as follows:
1. the invention optimizes and integrates the biological ecological combination process, and forms the integrated equipment for treating rural domestic gray water through ingenious design. The cylindrical double-layer structure is adopted, the functional area is reasonable, the central strengthening pretreatment pool (a sedimentation area and an anaerobic area) and the peripheral multi-effect filter pool (an aerobic area and an anoxic area) are arranged, meanwhile, the drop pool (a drop area) and the disinfection pool (a disinfection area) are skillfully added in the structure, the structure is compact, and the occupied area is small.
2. The system has no power consumption, and the yielding water meets the requirements of farmland irrigation and living miscellaneous uses. The system oxygenation adopts a drop aeration mode and a natural air draft mode of a gas distribution pipe of the filter, the drop aeration mode utilizes sewage to drop in a water curtain shape, the contact area with air is increased, meanwhile, the sewage drops into a water distribution channel to splash for further oxygenation, and the oxygenation effect is enhanced. The multi-effect filter is provided with the air distribution pipe, the air cap is arranged at the communication position of the air distribution pipe and the atmosphere, the natural wind speed is utilized to push the turbine of the fan to rotate and the air inside and outside the filter to circulate, and under the condition that the microbial activity is reduced in winter, the good aerobic environment in the multi-effect filter is maintained, so that the multi-effect filter has good organic matter and ammonia nitrogen removal effect, and the normal effluent quality is maintained. The residence time and the surface area of the pretreatment tank are enhanced through reasonable design, so that the lower rising flow velocity of sewage is kept, the precipitation effect of suspended matters is ensured under the condition that the addition of a medicament is not needed, and the problem of blockage of a subsequent multi-effect filter tank is solved.
3. According to the invention, unpowered uniform water distribution is realized by gravity drop and reasonable arrangement of the size structure of the drop tank and the form of the water distribution channel. The optimally integrated multi-effect filter is distributed around the strengthening pretreatment tank in a circular ring shape, the diameter of the circular ring is smaller than that of the traditional square filter, the multi-effect filter has no dead angle, and even water distribution is easier to realize. In addition, the water distribution channel with adjustable design level is positioned in the middle of the filter tank, water from the water drop tank falls into the water distribution channel and then overflows uniformly from two sides of the water distribution channel, so that uniform water distribution is further ensured.
4. The invention optimizes the filler grading, and ensures that the yielding water meets the requirements of farmland irrigation and greenbelt irrigation and living miscellaneous uses. Because rural life ash water pollutant concentration is low, the effluent has low pollutant requirements and no requirement on nitrogen and phosphorus under the condition of no discharge, the cheap and reliable traditional filler is selected, the optimal effect is achieved by optimizing the filler particle size grading and the filler proportion, the cost is saved, and the treatment effects of organic matters, ammonia nitrogen, turbidity, chromaticity, escherichia coli and the like are also ensured.
5. The invention is integrated equipment, has flexible installation and application, adopts the form of burying or adding the heat preservation shed, can realize stable operation in cold areas, can also be combined with vegetable greenhouse for construction, realizes the combination of rural domestic sewage treatment and planting industry, and realizes the on-site sewage resource utilization.
6. The system is simple in operation, maintenance and management, has low requirement on the level of operation and maintenance personnel, does not involve professional operation, and only needs to regularly suck and discharge the sludge in the reinforced pretreatment tank, thereby further ensuring the long-acting operation of sewage treatment facilities.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a cross-sectional view of an integrated treatment system for rural grey water recycling provided by the invention;
FIG. 2 is a plan view of the rural grey water recycling integrated treatment system provided by the invention;
FIG. 3 is a plan view of a raceway provided by the present invention;
FIG. 4 is a plan view of a pipeline provided by the present invention;
the device comprises a 1-reinforced pretreatment tank, a 2-traumatic water tank, a 3-multi-effect filter tank, a 4-disinfection tank, a 5-water inlet pipe, a 6-water outlet pipe, a 7-fixing frame, an 8-elastic filler, a 9-water outlet weir, a 10-reinforced pretreatment tank top cover, a 11-reinforced pretreatment tank mud discharge pipe, a 12-water distribution channel, a 13-adjustable fixing rod, a 14-detachable bolt, a 15-protective layer, a 16-efficient treatment layer, a 17-transition layer, a 18-water outlet supporting layer, a 19-air distribution pipe and a 20-hood.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
The embodiment of the invention discloses an integrated treatment system for rural grey water recycling, which is shown in fig. 1 and 2 and comprises an intensified pretreatment tank 1, a drop tank 2, a multi-effect filter tank 3, a disinfection tank 4, a water inlet pipe 5, a water outlet pipe 6 and a gas distribution pipe 19; wherein the strengthening pretreatment tank 1 is cylindrical; the drop water tank 2 is arranged in a closed ring shape along the wall of the reinforced pretreatment tank 1, and the highest position of the drop water tank 2 is lower than the reinforced pretreatment tank 1; the multi-effect filter tank 3 is arranged below the drop tank 2 in a semi-annular shape along the wall of the reinforced pretreatment tank 1, and the width of the multi-effect filter tank 3 is twice the width of the drop tank 2; the disinfection tank 4 is arranged below the water drop tank 2 in a semi-annular shape along the wall of the strengthening pretreatment tank 1, is arranged in a closed annular shape with the multi-effect filter tank 3, and is positioned above the disinfection tank 4, the wall of the water drop tank 2 is higher than the strengthening pretreatment tank 1, and a slow-release chlorine tablet is arranged in the disinfection tank; the water inlet pipe 5 is arranged at the bottom of the strengthening pretreatment tank 1; the water outlet pipe 6 is arranged at the bottom of the disinfection tank 4; the gas distribution pipe 19 is arranged in the middle of the multi-effect filter tank 3 in a semi-annular shape along the multi-effect filter tank, and two ports of the gas distribution pipe are respectively communicated with the atmosphere of the disinfection tank 4.
In one embodiment, the device further comprises a fixing frame 7, an elastic filler 8, an effluent weir 9, a reinforced pretreatment tank top cover 10 and a reinforced pretreatment tank mud discharge pipe 11, wherein the fixing frame 7 is arranged inside the reinforced pretreatment tank 1, the elastic filler 8 is fixed on the fixing frame 7, the effluent weir 9 is arranged around the reinforced pretreatment tank 1 and communicated with the drop tank 2, the reinforced pretreatment tank top cover 10 is arranged at the top of the reinforced pretreatment tank 1, and the reinforced pretreatment tank mud discharge pipe 11 is arranged at the bottom of the reinforced pretreatment tank 1. The elastic filler 8 has large specific surface area and is easy for microorganism to adhere and grow; the design of the peripheral water outlet structure can realize high-efficiency drop aeration; the sludge in the strengthening pretreatment tank 1 is pumped and transported outwards periodically through a sludge discharge pipe 11 of the strengthening pretreatment tank and a movable pump.
The strengthening pretreatment unit is used as the pretreatment unit of the subsequent multi-effect filter tank 3, longer residence time is set, and the strengthening pretreatment unit mainly has four aspects: firstly, precipitation, namely, reducing the SS concentration of effluent by reducing the upward flow rate of sewage and settling suspended matters into the bottom of a tank, so as to prevent the blockage of a subsequent multi-effect filter tank 3; secondly, the impact load resistance effect is achieved, rural domestic sewage is characterized in that the fluctuation of water quality and water quantity is large, and the impact load resistance capability of the system is improved through the long-time strengthening pretreatment; thirdly, degrading organic matters, and reducing the pollutant load of a subsequent multi-effect filter tank 3 by strengthening the treatment of the pretreatment tank 1 and reducing the concentration of the organic matters in sewage; and fourthly, providing conditions for the subsequent drop aeration.
In one embodiment, as shown in fig. 3, the water distribution channel further comprises a water distribution channel 12, an adjustable fixing rod 13 and a detachable bolt 14, wherein the water distribution channel 12 is annularly arranged at the middle position above the multi-effect filter tank 3 through the adjustable fixing rod 13, is detachably installed, and is connected through the detachable bolt 14. The effluent of the strengthening pretreatment tank 1 is in the form of an overflow weir, flows into the drop tank 2 along the tank wall, and then falls into the water distribution channel 12 through the drop tank 2. The water dropping pool 2 and the water distribution channel 12 are of annular structures, the water outlet of the water distribution channel 12 is in a triangular weir form, the water distribution channel is detachable in sections, and the water distribution channel 12 is ensured to be horizontal by connecting the adjustable fixing rods 13 with the pool walls of the multi-effect filter pool 3. The purpose of adopting detachable installation of the water distribution channel 12 is to ensure that the multi-effect filter tank 3 is convenient to overhaul. The main functions of the raceway 12 are three: firstly, distributing water, wherein the water discharged from the water falling pool 2 falls into a water distribution channel 12, and uniformly discharged water from two sides of the water distribution channel 12 flows into the multi-effect filter tank 3, so that uniform water distribution is ensured; secondly, the phenomenon that the surface of the filler is uneven and the water distribution is uneven due to the fact that the water drops impact the filler on the surface of the multi-effect filter tank 3 is prevented; thirdly, the water distribution channel 12 keeps a certain water level, and the drop aeration effect is better.
In one embodiment, the multi-effect filter 3 is provided with a protective layer 15, a high-efficiency treatment layer 16, a transition layer 17 and a water outlet supporting layer 18 from top to bottom. The physical and biological reactions occur in the multi-effect filter tank 3, the physical reactions mainly comprise filtering, interception and adsorption effects of the filler, the biological reactions mainly comprise biological films formed on the surfaces of the filler, pollutants are biologically degraded by aerobic microorganism flora, so that effective removal is achieved, and ammonia nitrogen is removed by converting nitrifying bacteria into nitrate nitrogen under an aerobic condition. The multi-effect filter tank 3 has the main functions of removing organic matters and ammonia nitrogen, and optimizing the growth environment of microorganisms by scientifically proportioning the proportion of natural river sand, zeolite and limestone.
In one embodiment, the fillers of the protective layer 15 and the transition layer 17 are both natural river sand; the grain size of the natural river sand is 0.5mm. In another embodiment, the natural river sand has a particle size of 1.6mm. The protection layer 15 mainly protects the high-efficiency treatment layer 16, and avoids the loss of the filler of the high-efficiency treatment layer 16 in the daily maintenance process, thereby influencing the treatment effect. The protective layer 15 is filled with single-filler natural river sand, is convenient to replace, and also plays a role in primary filtration. The main function of the transition layer 17 is to effectively connect with the water outlet supporting layer 18, prevent the filler of the high-efficiency treatment layer 16 from losing, and also play a role in further filtration.
In one embodiment, the filler of the high efficiency treatment layer 16 is at least one of zeolite, limestone, and natural river sand; the grain size of zeolite, limestone and natural river sand is 0.8mm. In another embodiment, the zeolite, limestone and natural river sand have a particle size of 4mm. The filler of the high efficiency treatment layer 16 is economical and readily available and is mixed in different formulations.
In one embodiment, the filler of the effluent support layer 18 is pebbles; the cobble particle size is 2mm. In another embodiment, the cobble particle size is 32mm. The main function of the water outlet supporting layer 18 is to support the filler of the whole multi-effect filter 3 system and prevent the filler from losing with the water flow from the system.
In one embodiment, as shown in fig. 4, the air cap 20 is further included, the air cap 20 is arranged at a port of the air distribution pipe 19, and the two ends of the air distribution pipe 19 form a height difference of 30 cm; further, a vent hole (not shown) is formed in the air distribution pipe 19 at 45 ° to the water flow, and the aperture of the vent hole is smaller than the minimum particle size of the filler of the high-efficiency treatment layer 16. In another embodiment, the two ends of the cloth air tube 19 form a height difference of 80 cm. The gas distribution pipe 19 can provide sufficient oxygen for the multi-effect filter tank 3 and promote the efficient removal of organic matters and ammonia nitrogen. The main function of the air distribution pipe 19 is to create a better aerobic environment for the multi-effect filter 3 under the condition of low activity of flora in winter, promote the efficient removal of organic matters and ammonia nitrogen and ensure the requirement of the water quality of reuse water.
Performance testing
The basic structure of the device used is the same as that shown in figures 1-4. And detecting the COD, BOD, ammonia nitrogen, anionic surfactant and total colibacillus content in the main inlet water quality and the main outlet water quality before and after treatment.
Wherein, the specific components of the device are as follows:
1. raw water tank: the method is used for sampling rural domestic grey water in storage.
2. An integrated processing system: phi 0.6mx2.5m; sterilizing water tank: 10L. Elastic filler is arranged in the strengthening pretreatment tank; the protective layer and the transition layer in the multi-effect filter tank are natural river sand with the grain diameter of 0.5-1.6mm, the high-efficiency treatment layer is a mixture of natural river sand, zeolite and limestone according to a certain proportion, the water outlet supporting layer is cobblestone with the grain diameter of 2-32mm, the water outlet enters a disinfection water tank, a slow-release chlorine tablet is arranged in the water tank, and the disinfection time is 15min. Raw water is lifted into the strengthening pretreatment tank by a peristaltic pump of 500ml/min, effluent after strengthening pretreatment uniformly falls into the middle of the multi-effect filter tank along the water distribution plate by gravity, and the effluent of the multi-effect filter tank is discharged after disinfection. The whole system has no extra electricity consumption except the lift pump.
3. The operation mode is as follows: the water inlet is controlled by a timing converter, the water is fed for six times in one day, and the water inlet time is 1h each time.
Results: the treated water quantity is 200L/d, the strengthening pretreatment residence time is 36h, and the hydraulic load of the multi-effect filter tank is 1.3m 3 /m 2 ·d。
The main inlet water quality and the main outlet water quality are shown in Table 1.
TABLE 1 comparison of Main Inlet Water quality and Main Outlet Water quality
| Project | Mainly water quality of water inlet | Quality of main effluent |
| COD(mg/L)≤ | 150 | 30 |
| BOD(mg/L)≤ | 80 | 15 |
| Ammonia nitrogen (mg/L) is less than or equal to | 25 | 10 |
| Anionic surfactant (mg/L) | 0.799 | 0.05 |
| Total colibacillus (individual/L) | 2.4×10 4 | 3 |
As can be seen from Table 1, the integrated treatment system of the invention can effectively reduce the contents of COD, BOD, ammonia nitrogen, anionic surfactant and total coliform bacteria in sewage.
The experiment shows that the invention can ensure that the effluent meets the water quality requirement of the reuse water under the conditions of low investment, low energy consumption and easy operation and maintenance management, and can realize the maximization of environmental benefit under the condition of minimum economic investment, thereby ensuring the long-acting operation of rural sewage treatment facilities.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Further, one skilled in the art can engage and combine the different embodiments or examples described in this specification.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (6)
1. The rural ash and water recycling integrated treatment system is characterized by comprising an enhanced pretreatment tank, a water falling tank, a multi-effect filter tank, a disinfection tank, a water inlet pipe, a water outlet pipe, a gas distribution pipe, a fixing frame, elastic filler, a water outlet weir, an enhanced pretreatment tank top cover, an enhanced pretreatment tank mud discharge pipe, a water distribution channel, an adjustable fixing rod and a detachable bolt;
the strengthening pretreatment tank is cylindrical;
the drop tank is arranged in a closed ring shape along the reinforced pretreatment tank wall, and the highest position of the drop tank is lower than the reinforced pretreatment tank;
the multi-effect filter tank is arranged below the drop tank in a semi-annular shape along the reinforced pretreatment tank wall, and the width of the multi-effect filter tank is twice the width of the drop tank;
the disinfection tank is arranged below the drop tank in a semi-annular shape along the reinforced pretreatment tank wall, is arranged in a closed annular shape with the multi-effect filter tank, and the height of the drop tank wall above the disinfection tank is higher than that of the reinforced pretreatment tank; a slow-release chlorine tablet is arranged in the disinfection tank;
the water inlet pipe is arranged at the bottom of the reinforced pretreatment tank;
the water outlet pipe is arranged at the bottom of the disinfection tank;
the gas distribution pipe is arranged in the middle of the multi-effect filter tank in a semi-annular shape along the multi-effect filter tank, and two ports of the gas distribution pipe are respectively communicated with the atmosphere of the disinfection tank;
the fixed frame is arranged in the strengthening pretreatment tank, the elastic filler is fixed on the fixed frame, the water outlet weir is arranged around the strengthening pretreatment tank and is communicated with the drop tank, the top cover of the strengthening pretreatment tank is arranged at the top of the strengthening pretreatment tank, and the mud discharge pipe of the strengthening pretreatment tank is arranged at the bottom of the strengthening pretreatment tank;
the water distribution channel is annularly arranged at the middle position above the multi-effect filter tank through the adjustable fixing rod;
the water distribution channel is detachably arranged and connected through the detachable bolt;
the multi-effect filter is sequentially provided with a protective layer, a high-efficiency treatment layer, a transition layer and a water outlet supporting layer from top to bottom.
2. The rural grey water recycling integrated treatment system according to claim 1, wherein the fillers of the protective layer and the transition layer are natural river sand; the grain diameter of the natural river sand is 0.5-1.6mm.
3. The rural grey water recycling integrated treatment system according to claim 2, wherein the filler of the efficient treatment layer is at least one of zeolite, limestone and natural river sand; the grain size of the zeolite, limestone and natural river sand is 0.8-4mm.
4. A rural grey water recycling integrated treatment system according to claim 3, wherein the filler of the water outlet bearing layer is cobble; the particle size of the cobblestone is 2-32mm.
5. The rural grey water recycling integrated treatment system according to claim 4, further comprising a hood, wherein the hood is arranged at the port of the air distribution pipe, and the two ends of the air distribution pipe form a height difference of 30-80 cm.
6. The rural grey water recycling integrated treatment system according to claim 5, wherein the air distribution pipe and the water flow are provided with air holes in the direction of 45 degrees, and the aperture of the air holes is smaller than the minimum particle size of the high-efficiency treatment layer filler.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210292810.3A CN114605037B (en) | 2022-03-22 | 2022-03-22 | Rural grey water cyclic utilization integration processing system |
| ZA2023/00352A ZA202300352B (en) | 2022-03-22 | 2023-01-09 | Integrated treatment system for recycling rural grey water |
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| CN202210292810.3A CN114605037B (en) | 2022-03-22 | 2022-03-22 | Rural grey water cyclic utilization integration processing system |
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| CN204039221U (en) * | 2014-08-01 | 2014-12-24 | 湖南艾布鲁环保科技有限公司 | A kind of biomembrance process four pond purification system of rural domestic sewage treatment |
| CN105948247B (en) * | 2016-05-25 | 2020-08-25 | 成都理工大学 | Operation method for improving denitrification efficiency of artificial rapid infiltration system |
| CN108083560B (en) * | 2017-12-13 | 2018-12-07 | 中国科学院地理科学与资源研究所 | A kind of rural activity area basin water resources recycle pollutant catabolic gene method and apparatus |
| CN208071547U (en) * | 2018-03-21 | 2018-11-09 | 湖南艾布鲁环保科技股份有限公司 | A kind of rural domestic sewage treatment small-sized biological contact purification tank |
| CN109592787A (en) * | 2019-01-22 | 2019-04-09 | 湖南中科环保技术有限公司 | A kind of efficient denitrification filters sewage water treatment method ecologically |
| CN109734254A (en) * | 2019-03-11 | 2019-05-10 | 重庆大学 | A kind of small rural Domestic sewage collecting, processing, reusing integral system |
| CN211999356U (en) * | 2020-03-12 | 2020-11-24 | 北京和瑞祥通检测技术有限公司 | Rural domestic sewage integrated treatment device |
| CN111333182A (en) * | 2020-03-27 | 2020-06-26 | 北京建筑大学 | Reciprocating type biological-ecological retention filter bed combined sewage treatment device and method |
| CN213037496U (en) * | 2020-06-16 | 2021-04-23 | 北京七星文旅生态科技有限责任公司 | Partitioned circulating soil infiltration system |
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