CN214422465U - Box device system for domestic sewage treatment - Google Patents
Box device system for domestic sewage treatment Download PDFInfo
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- CN214422465U CN214422465U CN202022611187.2U CN202022611187U CN214422465U CN 214422465 U CN214422465 U CN 214422465U CN 202022611187 U CN202022611187 U CN 202022611187U CN 214422465 U CN214422465 U CN 214422465U
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Abstract
The utility model relates to a box body device system for domestic sewage treatment, which comprises a box body, wherein a grid groove, a first anaerobic tank, an aerobic tank, a sedimentation tank and a disinfection tank are sequentially arranged in the box body; a first filler bed layer composed of biodegradable filler materials is arranged in the first anaerobic tank, activated sludge containing anaerobic flora and phosphorus accumulating bacteria is adsorbed on the surface of the biodegradable filler materials, and a first steel wire mesh layer, a plurality of filler particles prepared from the biodegradable filler materials and a second steel wire mesh layer are sequentially arranged in the aerobic tank from top to bottom; activated sludge containing aerobic flora and phosphorus accumulating bacteria is adsorbed on the surface of the filler particles; the device system has simple equipment process, small occupied area, easy operation and control and convenient movement, can effectively remove organic pollutants in the biological sewage, can also ensure that the indexes of total nitrogen and total phosphorus reach the national standard, and realizes high-efficiency purification of domestic sewage of dispersed farmers.
Description
Technical Field
The utility model relates to a sewage treatment technical field, in particular to a box device system for domestic sewage treatment.
Background
At present, in some suburb areas or rural areas, the concentration degree of the resident life is not as good as that of the city, the living areas are dispersed, the treatment mode of the domestic sewage generated in the resident household is simple and direct, and even the kitchen wastewater and the toilet sewage are directly discharged on the ground or directly discharged into rivers, so that certain environmental pollution or water quality pollution is caused.
With the continuous improvement of living conditions of people, the requirements of people on living environment are higher and higher, and the treatment modes of kitchen sewage, toilet sewage and the like are also emphasized. However, the existing device system for purification treatment of decentralized sewage on the market has the problems of complex equipment process flow, large control difficulty, poor mobility and poor equipment operation stability, and the indexes of Total Nitrogen (TN) and Total Phosphorus (TP) of purified water are still too high for purification of domestic sewage, even the indexes of Total Nitrogen (TN) and Total Phosphorus (TP) of the purified water are difficult to meet the national standard requirements.
Disclosure of Invention
The utility model aims to provide a: the device system for treating the domestic sewage is simple in equipment process, small in occupied area, easy to operate and control and convenient to move, organic pollutants in the biological sewage can be effectively removed by utilizing the device system, the total nitrogen and total phosphorus indexes can reach the national standard, and the dispersed farmer domestic sewage is efficiently purified.
In order to realize the purpose, the utility model discloses a technical scheme be:
a box body device system for domestic sewage treatment comprises a box body, wherein a grating groove, a first anaerobic tank, an aerobic tank, a sedimentation tank and a disinfection tank are sequentially arranged in the box body;
the top of the side wall of the box body is provided with a first water inlet, and the first water inlet is used for introducing domestic sewage to be treated into the box body;
a plurality of grid bars arranged at intervals are arranged in the grid grooves, the grid grooves are arranged at the top of the first anaerobic tank and are used for receiving the domestic sewage to be treated discharged from the first water inlet and primarily filtering the domestic sewage to be treated;
a first filler bed layer composed of biodegradable filler materials is arranged in the first anaerobic tank, activated sludge containing anaerobic flora and phosphorus accumulating bacteria is adsorbed on the surface of the biodegradable filler materials, and the first anaerobic tank is used for receiving sewage filtered by the grating tank, flowing through the first filler bed layer and then discharging the sewage from a water outlet of the first anaerobic tank;
a first steel wire mesh layer, a plurality of filler particles prepared from biodegradable filler materials and a second steel wire mesh layer are sequentially arranged in the aerobic tank from top to bottom; activated sludge containing aerobic flora and phosphorus accumulating bacteria is adsorbed on the surface of the filler particles; an aerator is arranged below the second steel wire mesh layer; the aerobic tank is used for receiving sewage discharged from the water outlet of the first anaerobic tank, and discharging the sewage from the water outlet at the bottom of the aerobic tank after the sewage sequentially flows through the first steel wire mesh layer, the filler particles and the second steel wire mesh layer;
the sedimentation tank is used for receiving sewage discharged from a water outlet at the bottom of the aerobic tank and carrying out sedimentation treatment, and a sludge return pipe is arranged at the bottom of the sedimentation tank and connected into the grid groove; the top of the sedimentation tank is provided with an overflow water outlet which is connected to the disinfection tank;
a chemical box is arranged in the disinfection tank, chlorine tablets or sodium hypochlorite solution is contained in the chemical box, a discharge port of the chemical box is connected to the disinfection tank, and the disinfection tank is used for receiving water discharged from the overflow water outlet of the sedimentation tank and disinfecting the water;
a first water outlet is formed in the side wall of the box body and is connected with the disinfection tank;
wherein the biodegradable filler material is one or more of Polycaprolactone (PCL), polylactic acid (PLA) and polyhydroxy amyl butyrate.
The utility model provides a treatment device system of domestic sewage is box structural system, and this box structural system mainly comprises there is the grid groove, first anaerobism pond, good oxygen pond, sedimentation tank and disinfection pond, and domestic sewage behind five purification tanks in the box structure, through mutually supporting of five purification tanks, utilizes the device system not only can effectively get rid of the organic pollutant in the biological sewage, can also make total nitrogen, total phosphorus index reach national standard, realizes high-efficient purification to dispersion peasant household domestic sewage. Meanwhile, the box body device system has the advantages of simple equipment process, small occupied area, easy operation and control, convenient movement and obvious advantages for domestic sewage treatment of dispersed farmers.
Wherein, the utility model discloses an in sewage treatment process, at first carry out the prefiltration through the grid groove and detach the fixed waste residue in pending waste water, then sewage flows through first anaerobism pond, is anaerobic state in the first anaerobism pond, fills the granule activated sludge who contains anaerobism, and activated sludge adsorbs on biodegradable filler material, and anaerobic microorganisms' anaerobic denitrification can turn into nitrogen gas with nitrate nitrogen such as nitrate, nitrite in the domestic sewage, deviate from the nitrogen element; meanwhile, the aerobic tank is provided with aerobic conditions, filler particles are arranged in the tank, the surfaces of the filler particles are attached with activated sludge containing aerobic flora, under the aeration condition, oxygen is enriched in water, organic matters in the sewage are degraded, and meanwhile, the aerobic flora plays a role in nitrification to convert ammonia nitrogen in the water into nitrate nitrogen; the phosphorus-accumulating bacteria play a role in removing phosphorus, then the sedimentation tank carries out sedimentation purification on water, sludge flows back to the grid groove through the sludge discharge device, supernatant of the sedimentation tank can be discharged after being disinfected in the disinfection tank, and the discharged purified water can reach the national discharge standard.
At present, in small-scale distributed sewage treatment, the problem that total nitrogen of effluent exceeds the standard due to incomplete denitrification caused by insufficient available carbon source of influent water often occurs. Some studies and patents adopt small molecule carbon sources and natural materials as carbon source supplements to support denitrification. But the cost of micromolecular carbon sources such as methanol, glucose and the like is too high, and the sludge yield is high; the natural materials such as straws, starch, corncobs and the like have the problems of unstable carbon source release and pipeline blockage caused by waste residues. The utility model discloses an all set up the biodegradable's that the load uses Polycaprolactone (PCL), polylactic acid (PLA), polyhydroxy butyric acid amyl ester or a plurality of as the raw materials filler in anaerobism pond and the good oxygen pond, this biodegradable is packed and is compared traditional organic plastic and is packed, has better hydrophilicity, can adsorb the microorganism better and form the biomembrane, does not have the problem that the waste residue that natural material produced blockked up the pipeline. The biodegradable filler can slowly release a carbon source in an anaerobic zone under the actions of sewage soaking and microorganisms, and is beneficial to denitrification of nitrate nitrogen in reflux liquid into gaseous nitrogen under an anoxic condition so as to achieve the aim of denitrification. In the aerobic zone, the biodegradable filler can slowly release a carbon source, which is beneficial to further aerobic denitrification of nitrate nitrogen which is not completely denitrified, and can also achieve the aim of denitrification. Meanwhile, in the aerobic zone, the slowly released carbon source is also beneficial to the assimilation and heterotrophic nitrification of ammonia nitrogen. In addition, the filler of the aerobic zone is arranged in a suspension manner, and when aeration is started, the aerobic zone is in a fluidized state, so that the mass transfer of pollutants in the sewage is facilitated. In addition, in the anoxic zone and the aerobic zone, the biodegradable filler is beneficial to the attachment and propagation of microorganisms to form a more stable biomembrane, so that microorganisms with relatively long generation time, such as anammox bacteria, nitrobacteria and the like, can also be attached to the biomembrane, and the loss of microorganisms playing a role in sewage treatment is avoided. Finally, in the aerobic zone and the anoxic zone, the biomembrane formed by adding the biodegradable filler can also form different nutrition conditions and dissolved oxygen condition microenvironments in the same space, so that the microbial diversity of sewage treatment is improved. Through the synergistic effect of the anaerobic tank and the aerobic tank, the problem that the total nitrogen of effluent exceeds the standard due to incomplete denitrification caused by insufficient available carbon source in sewage can be avoided.
As the preferred scheme of the utility model, in the grid groove, the interval between two adjacent grid bars is 8mm ~ 15 mm. The grid groove can carry out primary filtration with pending domestic sewage, remains some solid waste residue in the biological sewage in the grid groove. Preferably, in the grid grooves, the interval between two adjacent grid bars is 10mm to 15mm, such as 11mm, 12mm, 13mm, 14mm, 15mm, and the like.
As the preferred proposal of the utility model, the grating groove is detachably connected with the first anaerobic tank. The grid groove can be dismantled and set up and be convenient for clear up remaining solid waste in the grid groove.
As a preferred embodiment of the present invention, a second anaerobic tank is further disposed between the first anaerobic tank and the aerobic tank, a second filler bed layer made of biodegradable filler material is disposed in the second anaerobic tank, activated sludge containing anaerobic flora and phosphorus accumulating bacteria is adsorbed on the surface of the biodegradable filler material, and the second anaerobic tank is configured to receive sewage discharged from the water outlet of the first anaerobic tank and discharge the sewage from the water outlet of the second anaerobic tank after flowing through the second filler bed layer; the aerobic tank is used for receiving the sewage discharged from the water outlet of the second anaerobic tank and discharging the sewage from the water outlet at the bottom of the aerobic tank after the sewage sequentially flows through the first steel wire mesh layer, the filler particles and the second steel wire mesh layer. The biodegradable filler slowly and stably releases the carbon source under the action of the microorganisms, and the setting of the two anaerobic tanks can ensure the sufficiency of the additional carbon source and provide guarantee for denitrification.
As the preferred scheme of the utility model, the thickness of the first packing bed layer is 500mm ~ 700 mm.
As the preferred scheme of the utility model, the thickness of the second packing bed layer is 500mm ~ 700 mm. The reasonable arrangement of the thickness of the packed bed layer can not only ensure that anaerobic flora plays a denitrification role, but also ensure that the biodegradable packing can better provide a carbon source.
As the preferable scheme of the utility model, the biodegradable filler is one or two of Polycaprolactone (PCL) and polyhydroxy amyl butyrate. Preferably, the biodegradable filler is polycaprolactone and polyhydroxybutyrate amyl. More preferably, the weight ratio of the polycaprolactone to the polyhydroxy amyl butyrate is 0.5-1: 1. Through a great deal of experimental research of the inventor, the type and the proportion of the biodegradable filler can influence the purification effect of the device system. More preferably, the weight ratio of the polycaprolactone to the polyhydroxy amyl butyrate is 0.5-0.8: 1.
As a preferable scheme of the utility model, the aerator is connected with a fan; the fan is used for conveying air to the aerator to realize aeration.
As the preferred proposal of the utility model, a stirring device is arranged in the disinfection tank.
As the preferred proposal of the utility model, a pump is arranged on the sludge return pipe.
As a preferred aspect of the present invention, the top of the box device system is provided with at least one inspection opening having an opening. The inspection opening is arranged to facilitate observation, maintenance and safety inspection of the box device system.
To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:
1. the utility model provides a treatment device system of domestic sewage is box structural system, and this box structural system mainly comprises there is the grid groove, first anaerobism pond, good oxygen pond, sedimentation tank and disinfection pond, and domestic sewage behind five purification tanks in the box structure, through mutually supporting of five purification tanks, utilizes the device system not only can effectively get rid of the organic pollutant in the biological sewage, can also make total nitrogen, total phosphorus index reach national standard, realizes high-efficient purification to dispersion peasant household domestic sewage. Meanwhile, the box body device system has the advantages of simple equipment process, small occupied area, easy operation and control, convenient movement and obvious advantages for domestic sewage treatment of dispersed farmers.
2. The utility model discloses an all set up the biodegradable filler material that the load uses Polycaprolactone (PCL), polylactic acid (PLA), one or more of polyhydroxy butyric acid amyl ester are the raw materials in anaerobism pond and the good oxygen pond, this biodegradable filler material compares traditional organic plastic and packs, has better hydrophilicity, can adsorb the microorganism better and form the biomembrane, form different nutrient condition in same space, dissolved oxygen condition microenvironment, promote sewage treatment microorganism variety, the problem that the waste residue that does not have the natural material to produce blockked up the pipeline. The filler slowly and stably releases carbon sources under the action of microorganisms, continuously provides additional carbon sources for denitrification, and avoids the problem that the total nitrogen of effluent exceeds the standard due to incomplete denitrification caused by insufficient available carbon sources in sewage.
Drawings
FIG. 1 is a schematic configuration diagram of a tank apparatus system for domestic sewage treatment according to embodiment 1.
FIG. 2 is a schematic view showing the structure of the flow direction of domestic sewage in the tank apparatus system in example 1.
FIG. 3 is a schematic configuration diagram of a tank apparatus system for domestic sewage treatment according to embodiment 3.
Icon: 1-grid grooves; 11-a first water inlet; 2-a first anaerobic tank; 21-a first packing bed; 3-an aerobic tank; 31-a first steel wire mesh layer; 32-a second steel wire mesh layer; 33-an aerator; 333-blower; 4-a sedimentation tank; 41-a sludge return pipe; 411-a pump; 5-a disinfection tank; 51-a kit; 52-first water outlet; 53-a stirring device; 6-a second anaerobic tank; 61-a second packing bed; 7-inspection opening.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Example 1
As shown in fig. 1, a box device system for domestic sewage treatment comprises a box body, wherein a grating groove 1, a first anaerobic tank 2, a second anaerobic tank 6, an aerobic tank 3, a sedimentation tank 4 and a disinfection tank 5 are sequentially arranged in the box body; the top of the box body is provided with three inspection ports 7 with openings.
A first water inlet 11 is formed in the top of the side wall of the box body; the grating groove 1 comprises a plurality of grating strips which are arranged at intervals, and the interval between every two adjacent grating strips is 10 mm. The grid groove 1 is arranged at the top of the first anaerobic tank 2. The grating groove 1 and the first anaerobic tank 2 are detachably connected, and the grating groove 1 can be taken out from the inspection opening 7. The anaerobic tank is characterized in that a 600mm first filler bed layer 21 composed of biodegradable filler materials is arranged in the first anaerobic tank 2, the first filler bed layer 21 is a fixed bed layer, and activated sludge containing anaerobic flora and phosphorus accumulating bacteria is adsorbed on the surface of the biodegradable filler materials. The second anaerobic tank 6 is internally provided with a 600mm second filler bed layer 61 composed of biodegradable filler materials, the second filler bed layer 61 is a fixed bed layer, and activated sludge containing anaerobic flora and phosphorus accumulating bacteria is adsorbed on the surface of the biodegradable filler materials. A first steel wire mesh layer 31, a plurality of filler particles prepared from biodegradable filler materials and a second steel wire mesh layer 32 are sequentially arranged in the aerobic tank 3 from top to bottom; the filler particles are movable during the purification process under aeration. Activated sludge containing aerobic flora and phosphorus accumulating bacteria is adsorbed on the surface of the filler particles; an aerator 33 is arranged below the second steel wire mesh layer 32; the aerator 33 is connected with a blower 333.
The bottom of the sedimentation tank 4 is provided with a sludge return pipe 41, the sludge return pipe 41 is connected to the inside of the grid groove 1, and the sludge return pipe 41 is provided with a pump 411. A chemical box 51 is arranged in the disinfection tank 5, chlorine tablets or sodium hypochlorite solution is contained in the chemical box 51, a discharge port of the chemical box 51 is connected into the disinfection tank 5, a stirring device 53 is arranged in the disinfection tank 5, and the disinfection tank 5 is used for receiving water discharged from a water outlet of the sedimentation tank 4 and disinfecting the water; the side wall of the box body is provided with a first water outlet 52.
Wherein the biodegradable filler material is prepared from three materials of polycaprolactone, polylactic acid and polyhydroxy butyrate amyl ester according to the weight ratio of 1: 1:1 mixed.
The box body device system has the advantages of simple equipment process, small occupied area, easy operation and control, convenient movement and obvious advantages for domestic sewage treatment of dispersed farmers.
Collecting biological sewage of a certain farmer, and purifying the sewage by using the device of fig. 1, as shown by an arrow → in fig. 2, firstly, introducing domestic sewage to be treated into the box body from the first water inlet 11; then the domestic sewage is filtered by the grating groove 1; the sewage filtered by the grating groove 1 is introduced into the first anaerobic tank 2, flows through the first filler bed layer 21, and is discharged from a water outlet of the first anaerobic tank 2 after 2.5 hours; the discharged sewage is introduced into the second anaerobic tank 6, flows through the second filler bed layer 61, and is discharged from a water outlet of the second anaerobic tank 6 after 2.5 hours; and the discharged water enters the aerobic tank 3, and under the aeration of the aerator 33, sewage flows through the first steel wire mesh layer 31, the filler particles and the second steel wire mesh layer 32 in sequence and then is discharged from a water outlet at the bottom of the aerobic tank. Introducing the discharged water into the sedimentation tank 4 for sedimentation treatment, and discharging supernatant liquor on the top of the sedimentation tank 4 from a water outlet of the sedimentation tank 4; and the sludge at the bottom of the sedimentation tank 4 flows back to the grid groove. The water discharged from the sedimentation tank 4 enters a disinfection tank for disinfection and then is discharged from the first water outlet 52.
The index test was performed on the sewage before and after purification, and the test results are shown in table 1.
TABLE 1 Water index test results (unit mg/L) before and after domestic sewage purification
| Index of sewage | COD | BOD | SS | Total nitrogen | Total phosphorus |
| Before purification | 552.3 | 396.4 | 86.6 | 77.4 | 7.1 |
| After purification | 48.2 | 32.1 | 12.8 | 18.8 | 1.4 |
Example 2
Compared with the device system of example 1, the formula of the biodegradable filler is only changed in example 2, and in example 2, the biodegradable filler materials are polycaprolactone and polyhydroxybutyrate amyl ester; the weight ratio of the polycaprolactone to the polyhydroxy amyl butyrate is 0.8: 1. Other apparatus components, connection relationships and parameters of the apparatus system of example 2 are the same as those of the structure of example 1, and the purification process and the purification object are also the same.
The index test was performed on the sewage before and after purification, and the test results are shown in table 2.
TABLE 2 Water body index test results (unit mg/L) before and after domestic sewage purification
| Index of sewage | COD | BOD | SS | Total nitrogen | Total phosphorus |
| Before purification | 552.3 | 396.4 | 86.6 | 77.4 | 7.1 |
| After purification | 46.1 | 25.7 | 10.4 | 14.7 | 1.6 |
Comparative example 1
Compared with the device system of the example 1, the first anaerobic tank and the second anaerobic tank of the comparative example 1 have no filler beds and only contain activated sludge of anaerobic bacteria and phosphorus accumulating bacteria.
Collecting rural sewage of rural farmers as in example 1, purifying the sewage by using the device system of the comparison document 1, wherein the biological sewage still sequentially passes through the grating groove, the first oxidation tank, the second oxidation tank, the aerobic tank, the sedimentation tank and the disinfection tank, the difference from the example 1 is that the sewage passes through the first anaerobic tank, after the sewage is firstly introduced into the activated sludge for 2.5 hours, the water permeated from the upper layer of the activated sludge enters the activated sludge in the second anaerobic tank for 2.5 hours, the water permeated from the upper layer of the activated sludge in the second anaerobic tank enters the aerobic tank, and the rest purification process is the same as that of the example 1.
The device system of the comparative example 1 is used for purification, index tests are carried out on the sewage before and after purification, the test results are shown in the table 3, and the total nitrogen content of the purified sewage exceeds the standard and cannot reach the national discharge standard.
TABLE 3 Water index test results (unit mg/L) before and after domestic sewage purification
Example 3
As shown in fig. 3, a tank device system for domestic sewage treatment comprises a tank body, wherein a grating groove 1, a first anaerobic tank 2, an aerobic tank 3, a sedimentation tank 4 and a disinfection tank 5 are sequentially arranged in the tank body; the top of the box body is provided with three inspection ports 7 with openings.
A first water inlet 11 is formed in the top of the side wall of the box body; the grating groove 1 comprises a plurality of grating strips which are arranged at intervals, and the interval between every two adjacent grating strips is 10 mm. The grid groove 1 is arranged at the top of the first anaerobic tank 2. The grating groove 1 and the first anaerobic tank 2 are detachably connected, and the grating groove 1 can be taken out from the inspection opening 7. The anaerobic tank is characterized in that a 600mm first filler bed layer 21 composed of biodegradable filler materials is arranged in the first anaerobic tank 2, the first filler bed layer 21 is a fixed bed layer, and activated sludge containing anaerobic flora and phosphorus accumulating bacteria is adsorbed on the surface of the biodegradable filler materials. A first steel wire mesh layer 31, a plurality of filler particles prepared from biodegradable filler materials and a second steel wire mesh layer 32 are sequentially arranged in the aerobic tank 3 from top to bottom; the filler particles are movable during the purification process under aeration. Activated sludge containing aerobic flora and phosphorus accumulating bacteria is adsorbed on the surface of the filler particles; an aerator 33 is arranged below the second steel wire mesh layer 32; the aerator 33 is connected with a blower 333.
The bottom of the sedimentation tank 4 is provided with a sludge return pipe 41, the sludge return pipe 41 is connected to the inside of the grid groove 1, and the sludge return pipe 41 is provided with a pump 411. A chemical box 51 is arranged in the disinfection tank 5, chlorine tablets or sodium hypochlorite solution is contained in the chemical box 51, a discharge port of the chemical box 51 is connected into the disinfection tank 5, a stirring device 53 is arranged in the disinfection tank 5, and the disinfection tank 5 is used for receiving water discharged from a water outlet of the sedimentation tank 4 and disinfecting the water; the side wall of the box body is provided with a first water outlet 52.
Wherein the biodegradable filler material is formed by mixing polycaprolactone and hydroxy butyric acid in a weight ratio of 0.5: 1.
The box body device system has the advantages of simple equipment process, small occupied area, easy operation and control, convenient movement and obvious advantages for domestic sewage treatment of dispersed farmers.
Collecting biological sewage of a certain farmer, purifying the sewage by using the device shown in figure 3, and firstly introducing domestic sewage to be treated into the box body from the first water inlet 11; then the domestic sewage is filtered by the grating groove 1; the sewage filtered by the grating groove 1 is introduced into the first anaerobic tank 2, flows through the first filler bed layer 21, and is discharged from a water outlet of the first anaerobic tank 2 after 4 hours; the discharged sewage is introduced into the aerobic tank 3, and under the aeration of the aerator 33, the sewage flows through the first steel wire mesh layer 31, the filler particles and the second steel wire mesh layer 32 in sequence and then is discharged from a water outlet at the bottom of the aerobic tank. Introducing the discharged water into the sedimentation tank 4 for sedimentation treatment, and discharging supernatant liquor on the top of the sedimentation tank 4 from a water outlet of the sedimentation tank 4; and the sludge at the bottom of the sedimentation tank 4 flows back to the grid groove. The water discharged from the sedimentation tank 4 enters a disinfection tank for disinfection and then is discharged from the first water outlet 52.
The index test was performed on the sewage before and after purification, and the test results are shown in table 1.
TABLE 1 Water index test results (unit mg/L) before and after domestic sewage purification
| Index of sewage | COD | BOD | SS | Total nitrogen | Total phosphorus |
| Before purification | 552.3 | 396.4 | 86.6 | 77.4 | 7.1 |
| After purification | 47.2 | 28.4 | 11.7 | 15.9 | 1.6 |
From the above-mentioned sewage purification results of embodiment 1-3 and comparative example 1, after domestic sewage passed through five purification ponds in the box structure, through the mutual cooperation of five purification ponds, utilized the device system not only can effectively get rid of the organic pollutant in the biological sewage, still can make total nitrogen, total phosphorus index reach national standard, realized high-efficient purification to dispersion peasant household domestic sewage. Meanwhile, the box body device system has the advantages of simple equipment process, small occupied area, easy operation and control, convenient movement and obvious advantages for domestic sewage treatment of dispersed farmers. The utility model discloses an all set up the biodegradable filler material that the load uses Polycaprolactone (PCL), polylactic acid (PLA), one or more of polyhydroxy butyric acid amyl ester are the raw materials in anaerobism pond and the good oxygen pond, this biodegradable filler material compares traditional organic plastic and packs, has better hydrophilicity, can adsorb the microorganism better and form the biomembrane, form different nutrient condition in same space, dissolved oxygen condition microenvironment, promote sewage treatment microorganism variety, the problem that the waste residue that does not have the natural material to produce blockked up the pipeline. The filler slowly and stably releases carbon sources under the action of microorganisms, continuously provides additional carbon sources for denitrification, and avoids the problem that the total nitrogen of effluent exceeds the standard due to incomplete denitrification caused by insufficient available carbon sources in sewage. Through a great deal of experimental research of the inventor, the type and the proportion of the biodegradable filler can influence the purification effect of the device system. More preferably, the weight ratio of the polycaprolactone to the polyhydroxy amyl butyrate is 0.5-0.8: 1.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A box body device system for domestic sewage treatment is characterized by comprising a box body, wherein a grating groove (1), a first anaerobic tank (2), an aerobic tank (3), a sedimentation tank (4) and a disinfection tank (5) are sequentially arranged in the box body;
the top of the side wall of the box body is provided with a first water inlet (11) which is used for introducing domestic sewage to be treated into the box body;
a plurality of grid bars arranged at intervals are arranged in the grid groove (1), the grid groove is arranged at the top of the first anaerobic tank (2), and the grid groove (1) is used for receiving the domestic sewage to be treated discharged from the first water inlet (11);
a first filler bed layer (21) composed of biodegradable filler materials is arranged in the first anaerobic tank (2), activated sludge containing anaerobic flora and phosphorus accumulating bacteria is adsorbed on the surface of the biodegradable filler materials, and the first anaerobic tank (2) is used for receiving sewage filtered by the grating tank (1) and discharging the sewage from a water outlet of the first anaerobic tank (2) after flowing through the first filler bed layer (21);
a first steel wire mesh layer (31), a plurality of filler particles prepared from biodegradable filler materials and a second steel wire mesh layer (32) are sequentially arranged in the aerobic tank (3) from top to bottom; activated sludge containing aerobic flora and phosphorus accumulating bacteria is adsorbed on the surface of the filler particles; an aerator (33) is arranged below the second steel wire mesh layer (32); the aerobic tank (3) is used for receiving sewage discharged from a water outlet of the first anaerobic tank (2) and discharging the sewage from a water outlet at the bottom of the aerobic tank (3) after the sewage sequentially flows through the first steel wire mesh layer (31), the filler particles and the second steel wire mesh layer (32);
the sedimentation tank (4) is used for receiving sewage discharged from a water outlet at the bottom of the aerobic tank (3), a sludge return pipe (41) is arranged at the bottom of the sedimentation tank (4), and the sludge return pipe (41) is connected into the grid groove (1); the top of the sedimentation tank (4) is provided with an overflow water outlet which is connected to the disinfection tank (5);
a chemical box (51) is arranged in the disinfection tank (5), chlorine tablets or sodium hypochlorite solution is contained in the chemical box (51), a discharge hole of the chemical box (51) is connected into the disinfection tank (5), and the disinfection tank (5) is used for receiving water discharged from a water outlet of the sedimentation tank (4);
a first water outlet (52) is formed in the side wall of the box body, and the first water outlet (52) is connected with the disinfection tank (5);
wherein, the biodegradable filler material is one or more of polycaprolactone, polylactic acid and polyhydroxy amyl butyrate.
2. The tank device system for domestic sewage treatment according to claim 1, wherein the interval between two adjacent grid bars in the grid groove (1) is 8mm to 15 mm.
3. The tank device system for domestic sewage treatment according to claim 1, wherein the grid tray (1) and the first anaerobic tank (2) are detachably connected.
4. The box device system for domestic sewage treatment according to claim 1, wherein a second anaerobic tank (6) is further disposed between the first anaerobic tank (2) and the aerobic tank (3), a second filler bed (61) made of biodegradable filler material is disposed in the second anaerobic tank (6), activated sludge containing anaerobic flora and phosphorus accumulating bacteria is adsorbed on the surface of the biodegradable filler material, and the second anaerobic tank (6) is used for receiving sewage discharged from the water outlet of the first anaerobic tank (2) and discharging the sewage from the water outlet of the second anaerobic tank (6) after flowing through the second filler bed (61); the aerobic tank (3) is used for receiving sewage discharged from a water outlet of the second anaerobic tank (6) and discharging the sewage from a water outlet at the bottom of the aerobic tank after the sewage sequentially flows through the first steel wire mesh layer (31), the filler particles and the second steel wire mesh layer (32).
5. The box device system for domestic sewage treatment according to claim 4, wherein the thickness of the first packing bed is 500mm to 700 mm; the thickness of the second filler bed layer is 500 mm-700 mm.
6. The tank device system for domestic sewage treatment according to claim 1, wherein the biodegradable filler is one or both of polycaprolactone and polyhydroxybutyrate amyl ester.
7. The tank device system for domestic sewage treatment according to claim 6, wherein said biodegradable filler is polycaprolactone and polyhydroxybutyrate amyl ester; the weight ratio of the polycaprolactone to the polyhydroxy amyl butyrate is 0.5-1: 1.
8. The tank device system for domestic sewage treatment according to claim 1, wherein a blower (333) is connected to the aerator (33); the blower (333) is used for conveying air to the aerator (33).
9. Tank device system for domestic sewage treatment according to claim 1, wherein a stirring device (53) is provided inside the disinfection tank (5).
10. The tank apparatus system for domestic sewage treatment according to any one of claims 1 to 9, wherein a pump (411) is provided on the sludge return pipe (41).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022611187.2U CN214422465U (en) | 2020-11-12 | 2020-11-12 | Box device system for domestic sewage treatment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022611187.2U CN214422465U (en) | 2020-11-12 | 2020-11-12 | Box device system for domestic sewage treatment |
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| CN214422465U true CN214422465U (en) | 2021-10-19 |
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| CN202022611187.2U Active CN214422465U (en) | 2020-11-12 | 2020-11-12 | Box device system for domestic sewage treatment |
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| CN (1) | CN214422465U (en) |
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