CN209872677U

CN209872677U - Integrated sewage treatment device

Info

Publication number: CN209872677U
Application number: CN201920353295.9U
Authority: CN
Inventors: 付超; 赵建军; 潘伯宁; 徐进; 宋怡明; 周子敏
Original assignee: Nanjing Institute of Technology
Current assignee: Nanjing Institute of Technology
Priority date: 2019-03-20
Filing date: 2019-03-20
Publication date: 2019-12-31
Anticipated expiration: 2029-03-20

Abstract

The utility model discloses an integration sewage treatment plant, among the device, the partition region is set up to swash plate sedimentation district and oxygen deficiency contact interval, and the partition region is for going into down water, prevents that the air from getting into the anoxic zone. The anaerobic contact zone and the aerobic contact zone are separated by the first water distribution zone and the second water distribution zone, so that microorganisms in all the zones cannot influence each other. The anoxic contact zone and the anaerobic contact zone are sealed by cover plates, a stirrer is further arranged on the cover plates, and the bottom of the adsorption filtration zone is connected with a water suction pump for providing negative pressure. The utility model discloses a set up each contact zone, the biomembrane contact method that will make up the wadding and be the main replaces the activated sludge process among the traditional handicraft for this technology has the characteristics that produce mud few, take up an area of for a short time, contact efficiency is high, the energy saving of power, makes combination wadding tow constantly flutter through the aerator and the agitator that set up, and through the modified active carbon who sets up, pollutant and the microorganism in the sewage can further be adsorbed and filtered, improve the quality of water of play.

Description

Integrated sewage treatment device

Technical Field

The utility model belongs to the sewage treatment field relates to an integration sewage treatment plant.

Background

In recent years, with the rapid development of economic society, the problem of water pollution is becoming more serious. Besides industrial and agricultural wastewater, domestic sewage with increased discharge year by year also becomes a considerable important factor. Compared with the discharge management of industrial and agricultural wastewater, the discharge of domestic sewage has certain randomness and dispersity, so that the domestic sewage cannot be effectively treated. In addition, China has dense population in rivers and lakes, and the population of agricultural rural areas accounts for half, so compared with relatively complete sewage collection and treatment in cities, most of the population in the rural areas is dispersed, sewage treatment plants are not suitable, and the effective collection and proper treatment of domestic sewage are difficult.

The rural distributed sewage mainly comprises kitchen waste water, washing waste water, toilet sewage and the like, generally does not contain toxic substances, but often has higher nutrient elements such as nitrogen, phosphorus and the like. Aiming at the dispersive sewage, most sewage treatment equipment on the market adopts an activated sludge method at present, so that the problems of high sludge yield, high investment cost, poor denitrification and dephosphorization effect and poor efficiency exist, and the first-class B standard in GB18918-2002 pollutant discharge Standard of urban Sewage treatment plant is difficult to achieve.

Disclosure of Invention

The to-be-solved technical problem of the utility model is to provide an integrated sewage treatment plant that area is little, and nitrogen and phosphorus removal efficiency is high, satisfies the effluent and is superior to the emission standard of the one-level B in "urban sewage treatment plant pollutant emission standard" GB18918-2002, is close IV class water in "surface water environment quality standard" (GB 3838-2002).

The utility model discloses a technical scheme who solves technical problem and adopt does:

an integrated sewage treatment device comprises a device body, wherein an inclined plate sedimentation zone, a separation zone, an anoxic contact zone, an anaerobic contact zone, a water distribution zone, an aerobic contact zone and an adsorption filtration zone are sequentially arranged in the device body along a sewage flow path;

the inclined plate sedimentation zone and the separation zone are separated by a first overflow plate, the separation zone and the anoxic contact zone are separated by a second partition plate, the anoxic contact zone and the anaerobic contact zone are separated by a second overflow plate, the anaerobic contact zone and the water distribution zone are separated by a third partition plate, the water distribution zone and the aerobic contact zone are separated by a fourth partition plate, and the aerobic contact zone and the adsorption filtration zone are separated by a third overflow plate;

the bottom of the second clapboard is provided with a plurality of limber holes; the bottom of the third partition board is provided with a plurality of water through pipes, and each water through pipe is provided with a check valve for preventing backflow; the whole plate of the fourth partition plate is uniformly provided with water through holes; a plurality of water through holes are formed in the upper parts of the first overflow plate, the second overflow plate and the third overflow plate;

the upper parts of the separation region, the anoxic contact region and the anaerobic contact region are sealed through cover plates;

a sludge discharge pipe is arranged on the side surface of the bottom of the inclined plate sedimentation area, and a first valve is arranged on the sludge discharge pipe; a water pumping pipeline extends out of the bottom of the adsorption filtration area, and a water pumping pump is connected to the water pumping pipeline; modified activated carbon filler is arranged in the adsorption filtering area;

a plurality of combined soft fillers are arranged in the anoxic contact zone, the anaerobic contact zone and the aerobic contact zone, and microorganisms for water treatment grow on the combined soft fillers in a hanging film manner;

and sewage enters the inclined plate sedimentation area for sedimentation, is treated by three contact areas and is pumped out by the water suction pump after being filtered by the modified activated carbon filler in the adsorption filtration area.

Furthermore, a horizontal permeable plate which is integrally connected with the inner wall surface of the filtering area along the circumferential direction is arranged in the adsorption filtering area, and a filling barrel is supported above the permeable plate; the packing barrel is a cuboid barrel with an opening at the upper part, water seepage holes are uniformly formed around and at the bottom of the packing barrel, and a lifting handle is integrally connected to the upper part of the packing barrel;

the modified activated carbon filler is filled in the filler barrel, and the modified activated carbon filler is ferric trichloride modified activated carbon filler;

the pore diameter of the water seepage hole is smaller than the particle size of the modified activated carbon filler; the water pumping pipeline is positioned below the water permeable plate.

Furthermore, a flow guide area is arranged in front of the inclined plate sedimentation area, the flow guide area and the inclined plate sedimentation area are separated by a first partition plate, a plurality of semicircular water through holes are formed in the bottom of the first partition plate, and sewage enters the inclined plate sedimentation area from the semicircular water through holes.

Furthermore, the sewage treatment device is of a single-return structure, and sewage flows into the aerobic contact zone from the anaerobic contact zone through the water distribution zone in a baffling manner.

Furthermore, a partition plate capable of being pulled up and down is arranged in the water distribution area, the partition plate can divide the water distribution area into a first water distribution area and a second water distribution area, the first water distribution area and the anaerobic contact area are partitioned by the third partition plate, and the second water distribution area and the aerobic contact area are partitioned by the fourth partition plate.

Furthermore, stirrers for stirring sewage are arranged in the anoxic contact zone, the anaerobic contact zone and the aerobic contact zone.

Furthermore, a plurality of aeration pipes are uniformly laid at the bottom of the aerobic contact zone.

Furthermore, a heating constant temperature rod for heating sewage is arranged in the anaerobic contact zone.

Further, the integrated sewage treatment device also comprises a gas stripping reflux device which can reflux part of water in the aerobic contact zone to the separation zone.

Furthermore, a back flushing port is formed in the bottom of the adsorption filtering area, a back flushing pipe is connected to the outside of the back flushing port, and a second valve is arranged on the back flushing pipe; the upper part of the adsorption filtration zone is also connected with a flow guide pipe for discharging back washing water, and the flow guide pipe is provided with a third valve; the back washing port is positioned below the water permeable plate.

Compared with the prior art, the beneficial effects of the utility model reside in that:

(1) the utility model discloses an integration sewage treatment plant is through setting up the inclined plate sedimentation district, makes sewage get rid of at the suspension Solid (SS promptly) that inevitably introduces in transportation process high efficiency, and it is even to be favorable to distributed sewage distribution of intaking simultaneously, has reduced taking up an area of the device.

(2) By arranging the anoxic, anaerobic and aerobic three-level areas, the degradation and oxidation capability of various organic matters in the sewage can be enhanced, and the nitrification and denitrification capabilities can be improved.

(3) The combined soft filler is filled in the three-level contact area, so that the attached microorganism amount is increased in a limited space, the biochemical reaction efficiency is increased, and compared with the sludge in a free state by an activated sludge method, the combined soft filler is relatively stable because microorganisms are fixed on the surface of the filler, the growth period of the microorganisms is prolonged, only a small part of aged sludge falls off to form surplus sludge, the produced sludge is only aged sludge (most of the sludge discharged by the activated sludge method is new sludge), the sludge production amount is reduced compared with the traditional activated sludge method, the occupied area is small, and the investment and maintenance cost is low.

(4) The ferric trichloride modified granular activated carbon can further adsorb nitrate nitrogen and total phosphorus in the effluent of secondary treatment after physical treatment and biochemical treatment, and filter an aged biomembrane and residual SS dropped off after the secondary treatment, so that the water quality of the effluent is improved (primary treatment, physical treatment, such as filtration and precipitation, and secondary treatment, generally biochemical treatment, generally referred to as secondary effluent, and subsequent treatment, referred to as tertiary treatment or advanced treatment).

Drawings

FIG. 1 is a schematic structural view (overlook) of the integrated sewage treatment device of the present invention;

FIG. 2 is a schematic structural view of a combined soft filler arranged in an aerobic contact zone;

FIG. 3 is a schematic structural view of the rear half part of the sewage treatment apparatus of the present invention;

FIG. 4 is a schematic structural view of the front half of the sewage treatment apparatus of the present invention;

FIG. 5 is a schematic structural view of a stuffing barrel;

FIG. 6 is a schematic view of the internal structure of the adsorption filtration zone of the present invention;

reference numerals: 1-inclined plate sedimentation zone, 2-anoxic contact zone, 3-anaerobic contact zone, 4-aerobic contact zone, 5-adsorption filtration zone, 6-sludge discharge pipe, 7-flow guide zone, 8-partition zone, 9-anoxic contact zone stirrer, 10-anaerobic contact zone stirrer, 11-heating constant temperature rod, 12-water distribution zone, 13-water distribution zone, 14-aerobic contact zone stirrer, 15-aeration pipe, 16-gas stripping reflux device, 17-water pump, 18-back flushing port, 19-combined soft filler, 20-modified activated carbon filler, 21-filler barrel, 22-first partition plate, 23-second partition plate, 24-third partition plate, 25-fourth partition plate, 26-first overflow plate and 27-second overflow plate, 28-partition plate, 29-third overflow plate, 30-biogas pipe, 31-water inlet pipe, 32-check valve and 33-water permeable plate.

Detailed Description

In order to make the technical means, creation features, achievement purposes and effects of the present invention easy to understand, the present invention will be further clarified with reference to the accompanying drawings and the detailed description.

The integrated sewage treatment device shown in fig. 1 is of a 'single-pass' structure and comprises a device body. The device body is internally provided with a flow guide area 7, an inclined plate sedimentation area 1, a separation area 8, an anoxic contact area 2, an anaerobic contact area 3, a first water distribution area 12, a second water distribution area 13, an aerobic contact area 4 and an adsorption filtration area 5 in sequence along a sewage flow path.

Specifically, the device body is shaped like a rectangular parallelepiped with an upper opening, and a short partition integrally connected to front and rear (in fig. 1, the lower wall is front and the upper wall is rear) walls of the device body is provided along the width direction of the device body on the rightmost side. The short partition plate divides the device body into a left part and a right part, wherein the right part is a water distribution area. A partition plate 28 which can be drawn up and down is arranged in the water distribution area. Specifically, a vertical groove extending to the bottom of the device body is formed in the middle of the inner wall surface of the right side of the device body, and correspondingly, a vertical groove extending to the bottom of the device body is formed in the middle of the end surface, opposite to the right side wall of the device body, of the short partition plate. The partition plate 28 is a one-piece plate without holes, the thickness of the partition plate is matched with the vertical grooves, and the partition plate 28 is inserted into the pair of vertical grooves to divide the water distribution area into the first water distribution area 12 and the second water distribution area 13 which are equal in size. The part of the short partition located in front of the partition plate 28 is the fourth partition 25, and the part of the short partition located in rear of the partition plate 28 is the third partition 24.

The left half part of the device body separated by the short partition plate is further equally divided into a front part and a rear part by a long partition plate which is integrally connected with the left side wall of the device body and the short partition plate. Wherein, first half sets gradually first baffle 22, first overflow board 26, second baffle 23 and second overflow board 27 from left to right, and first baffle 22, first overflow board 26, second baffle 23 and second overflow board 27 are respectively with long baffle and device body preceding inside wall face body coupling. The rear half part is provided with a third overflow plate 29, and the third overflow plate 29 is integrally connected with the long clapboard and the rear inner side wall surface of the device body. The long partition is in line with the partition plate 28, seen from above.

The diversion area 7 and the inclined plate sedimentation area 1 are separated by a first partition plate 22, the inclined plate sedimentation area 1 and the separation area 8 are separated by a first overflow plate 26, the separation area 8 and the anoxic contact area 2 are separated by a second partition plate 23, the anoxic contact area 2 and the anaerobic contact area 3 are separated by a second overflow plate 27, the anaerobic contact area 3 and the water distribution area 12 are separated by a third partition plate 24, the water distribution area 13 and the aerobic contact area 4 are separated by a fourth partition plate 25, and the aerobic contact area 4 and the adsorption filtration area 5 are separated by a third overflow plate 29.

In the embodiment, the sum of the lengths of the diversion area 7, the inclined plate sedimentation area 1 and the separation area 8 is equal to the length of the adsorption filtration area 5, the sum of the lengths of the anoxic contact area 2 and the anaerobic contact area 3 is equal to the length of the aerobic contact area 4, and the lengths of the first water distribution area 12 and the second water distribution area 13 are equal.

As shown in fig. 1, 3 and 4, the bottom of the first partition plate 22 is provided with a plurality of semicircular water through holes, and the bottom of the second partition plate 23 is provided with a plurality of circular water through holes. The bottom of the third partition 24 is provided with a plurality of water pipes vertically passing through the partition 24, and each water pipe is provided with a check valve 32 for preventing reverse flow. The whole plate of the fourth clapboard 25 is evenly provided with a plurality of circular limber holes, and the upper parts of the first overflow plate 26, the second overflow plate 27 and the third overflow plate 29 are all provided with a plurality of circular limber holes.

The upper parts of the separation region 8, the anoxic contact region 2 and the anaerobic contact region 3 are all sealed through a cover plate so as to prevent air from entering the anoxic contact region 2 and the anaerobic contact region 3. The sealing mode can be that a sealant is applied to the joint of the cover plate and the corresponding area, or a sealing gasket is arranged, and then the sealing mode is pressed by the weight of the cover plate. Of course, other ways of effectively sealing are also possible, and are not described herein.

The cover plate at the upper part of the anaerobic contact zone 3 is connected with a biogas pipe 30, and the biogas pipe 30 is communicated with a gas collecting tank outside the sewage treatment device, so as to collect biogas generated by anaerobic acidolysis reaction. A plurality of combined soft fillers 19 are arranged below the liquid level of the anoxic contact zone 2, the anaerobic contact zone 3 and the aerobic contact zone 4, and meanwhile, microorganisms are attached to the combined soft fillers 19 in a film-hanging mode. The combined soft filler 19 is a commercially available part, the inner ring of the combined soft filler is snowflake-shaped plastic, the outer ring of the combined soft filler is a large plastic ring with hydroformylation fibers, and the combined soft filler is formed by uniformly connecting steel wires in series, and reference is made to fig. 2. In the anoxic contact area 2 and the anaerobic contact area 3, the combined soft filler 19 is fixed in a mode of being hung on the lower end face of the upper cover plate. Specifically, the top of the steel wire and the lower end face of the cover plate are directly spot-welded, or a plurality of hanging hooks are fixedly arranged on the lower end face of the cover plate to hang the steel wire.

As shown in fig. 1 and 2, a plurality of opposite bumps are fixedly arranged on the top of the side wall surfaces of the two long sides of the aerobic contact zone 4, each bump is provided with a through hole for connecting a steel wire, and a plurality of transverse steel wires are respectively and correspondingly connected with the opposite bumps. The top of the steel wire connected with the combined soft filler 19 in series is wound on the transverse steel wire to be suspended, and the combined soft filler 19 extends to the position below the liquid level.

In this embodiment, in the laboratory, the microorganisms on the combined soft packing 19 are used for packing and filming the returned sludge in the secondary sedimentation tank of the sewage plant. In practical application, a natural sewage film hanging method is adopted (rural distributed sewage is non-industrial waste water, and the good nutrition ratio of the rural distributed sewage can be beneficial to film hanging). The sludge in the anaerobic anoxic zone can be selected from commercially available anaerobic granular sludge, the sludge can be used after being acclimated for several days to adapt to water quality, and the sludge can be inoculated into the aerobic zone to form a film or can be naturally formed (the sludge can be inoculated into the film more quickly).

Two anoxic contact zone agitators 9 are fixedly arranged on a cover plate at the upper part of the anoxic contact zone 2, the two anoxic contact zone agitators 9 are respectively arranged at the positions 1/3 and 2/3 in the length direction of the anoxic contact zone 2, and the agitating blades of the two anoxic contact zone agitators 9 all extend to the position below the sewage liquid level. An anaerobic contact zone stirrer 10 is fixedly arranged at the central position of the upper cover plate of the anaerobic contact zone 3, and a stirring blade of the anaerobic contact zone stirrer 10 also extends to the position below the liquid level. 3 fixed heating constant temperature rods 11 that are equipped with in bottom of anaerobism contact zone, heating constant temperature rods 11 embeds has temperature sensor, microprocessor and heating rod, and temperature sensor measures temperature in the anaerobism contact zone 3, and microprocessor is according to the outage of temperature control heating rod, and the best fermentation temperature of 35 ~ 38 ℃ (middle temperature) that makes anaerobism contact zone 3 intermediate water temperature can stably reach anaerobism.

2 support brackets are respectively fixed above the aerobic contact zone 4 in a bridging manner along the width direction, and each support bracket is a channel steel with a pair of notches arranged oppositely. The 2 aerobic contact zone stirrers 14 are uniformly arranged along the length direction of the aerobic contact zone 4 and are respectively supported by the 2 supporting brackets, the stirring blades of the 2 aerobic contact zone stirrers 14 extend to the position below the liquid level, and the 3 aeration pipes 15 are uniformly arranged at the bottom of the aerobic contact zone 4.

Each stirrer can make the fiber bundle of the combined soft filler 19 continuously float, so that the microorganism grows mature, and the investment cost is reduced. The aeration pipe 15 blows air into the aerobic contact zone 4, so that the oxygen requirement in the aerobic contact zone 4 is met, and meanwhile, the fiber bundle of the combined soft filler 19 can continuously float, so that the aging biological membrane can fall off.

It is noted that in the anoxic contact zone 2, the anaerobic contact zone 3 and the aerobic contact zone 4, the combined wadding 19 is arranged at a distance from the agitator of the corresponding zone in order to prevent the agitator blades from agitating the combined wadding 19.

As shown in fig. 1, 3 and 4, a water inlet pipe 31 is arranged on the side wall surface at the upper part of the flow guide area 7, a sludge discharge pipe 6 is arranged on the side surface at the bottom of the inclined plate sedimentation area 1, and a first valve is arranged on the sludge discharge pipe 6 to control the on-off of the sludge discharge pipe 6. The inclined plates which are inclined at an angle of 60 degrees with the bottom are arranged in the inclined plate sedimentation zone 1 at intervals, the inclined plates are arranged in the sedimentation zone 1 and are designed conventionally, and the sedimentation efficiency can be greatly improved compared with a horizontal flow type sedimentation tank (when the volume of the sedimentation tank is a fixed value, the sedimentation tank is shallower, and the sedimentation efficiency is higher). 60 degrees is the optimum angle of the setting value of the common inclined plate, and under the angle, the sedimentation efficiency is better without influencing the discharge of the plate mud.

As shown in fig. 1, 3, 5 and 6, a horizontal permeable plate 33 integrally connected with the inner wall surface of the filtering zone 5 along the circumferential direction is arranged in the adsorption filtering zone 5, and the filling barrel 21 is supported above the permeable plate 33. The structure of the filling barrel 21 is as shown in fig. 5, which is a cuboid barrel with an opening at the upper part, the periphery and the bottom of the barrel are uniformly provided with water seepage holes, and the upper part of the barrel is integrally connected with two handles (one on the left and one on the right). The filler barrel 21 is filled with ferric trichloride modified activated carbon filler 20, and the pore diameter of the water seepage hole is smaller than the particle size of the modified activated carbon filler 20. A water pumping pipeline extends out of the bottom of the adsorption filtration area 5, and a water pumping pump 17 is connected to the water pumping pipeline. The water pumping pipeline is positioned below the water permeable plate 33.

The bottom of the adsorption filtration zone 5 is also provided with a back flushing port 18, and the back flushing port 18 is also positioned below the water permeable plate 33, refer to fig. 3 and 6. The back flushing port 18 is externally connected with a back flushing pipe, the back flushing pipe is provided with a second valve, and the second valve is in a closed state when the device works normally. The upper part of the adsorption filtering area 5 is also connected with a flow guide pipe for discharging back washing water, the flow guide pipe is provided with a third valve, and the third valve is closed when the device works normally. When the backwashing is needed, the second valve and the third valve are opened simultaneously. By arranging the back washing port 18, the service life of the modified activated carbon filler 20 can be prolonged, the frequency of manual replacement is reduced, and the investment is reduced.

In the embodiment, 0.15mol/L ferric trichloride solution is used as an impregnation liquid for the ferric trichloride modified granular activated carbon, the activated carbon is impregnated for 6 hours, the pH value is adjusted to 7-8 (partial alkalinity), after the activated carbon is vibrated and impregnated for 6 hours again, the activated carbon is dried at a constant temperature of 105 ℃ for 2 hours, the optimal adsorption pH value is 6-8, and neutral water can be discharged after the activated carbon is effectively connected with an aerobic contact zone, so that the optimal adsorption condition is achieved.

The regeneration period of the ferric trichloride modified granular activated carbon filler is 24-36 h, the regeneration method comprises the steps of taking the ferric trichloride modified granular activated carbon filler out of the adsorption filtration area 5, and then soaking the ferric trichloride modified granular activated carbon filler in 0.1mol/L NaOH solution for 12h, wherein the desorption rate can reach 64.5%.

The working process of the sewage treatment device is as follows:

in a normal state, the partition plate 28 is not inserted, and the first water distribution area 12 and the second water distribution area 13 are a complete water distribution area. Firstly, the sewage enters the diversion area 7 through the water inlet pipe 31, and uniformly enters the inclined plate sedimentation area 1 through the semicircular water through holes at the bottom of the first partition plate 22 (the sludge and the sewage enter the inclined plate sedimentation area 1 together), and in order to enable the sewage and the sludge to enter the sedimentation area 1 more smoothly, the bottom of the diversion area 7 can be set to be 0.002 gradient. The inclined plates with 60 degrees arranged in the inclined plate sedimentation zone 1 can greatly improve the sedimentation efficiency under the condition of small occupied area.

The sewage then overflows from the upper part of the first overflow plate 26 into the separation zone 8 and from the water passage holes in the bottom of the second partition 23 into the anoxic contact zone 2. The arrangement of the upper inlet and the lower outlet adopted by the separating area 8 can isolate the external air from entering the anoxic contact area 2 through the water seal effect, thereby ensuring the normal anoxic environment. On the other hand, can also prevent that the silt in the inclined plate sedimentation zone 1 from getting into oxygen deficiency contact zone 2, influencing sewage treatment effect.

Then, the sewage is overflowed into the anaerobic contact zone 3 through the second overflow plate 27 in turn, and is introduced into the water distribution zone through the water pipe provided with the check valve 32 at the bottom of the third partition plate 24. The water pipe of the third clapboard 24 is arranged at the bottom, and the check valve 32 is arranged on the water pipe, so that air can be prevented from entering the anaerobic contact zone 3 from the water distribution zone and influencing the microbial activity in the anaerobic contact zone 3. After passing through the water distribution zone, the sewage in the anaerobic contact zone 3 is baffled to enter the aerobic contact zone 4, so that a single return stroke is realized.

Finally, water overflows from the aerobic contact zone 4 through a third overflow plate 29 and enters an adsorption filtration zone 5, total phosphorus and nitrate nitrogen which do not reach the standard in secondary treatment in the sewage are adsorbed and filtered by ferric trichloride modified granular activated carbon filler, and the total phosphorus and nitrate nitrogen are pumped out by a water pump 17.

The anaerobic zone 3 can acidolyze macromolecular indissolvable organic matters in the sewage into micromolecular organic matters for the aerobic zone 4 to treat. The anoxic zone 2 is arranged in front of the anaerobic zone 3 and the aerobic zone 4, and has the following advantages: 1. the alkalinity generated by denitrification in the anoxic stage can be used for supplementing the alkalinity required by nitrification in the aerobic stage. 2. Organic matters in water are directly utilized in the anoxic stage, and nitrate is used as an electron acceptor, so that the aeration quantity in the aerobic stage can be saved, the dissolved oxygen in the return water is further reduced, and the stable operation of an anoxic zone and the whole device is facilitated. 3. The high-load water body does not directly enter the aerobic zone, so that the sludge bulking risk (the biochemical reaction of aerobic sludge is violent, the quality of inlet water is unstable, and the sludge bulking phenomenon is easy to occur when the load is high) can be reduced.

It should be particularly noted that when the aerobic contact zone 4 is abnormal (such as sludge swelling and a large amount of foam) or the anaerobic contact zone 3 is abnormal (such as rancidity phenomenon pH <6.5, obvious sludge floating in effluent, too high or too low VFA, and the like, the VFA is normally 2-3 mol/L), the partition plate 28 can be inserted into the water distribution zone, and the first water distribution zone 12 and the second water distribution zone 13 are completely partitioned by the partition plate 28, so that the anaerobic contact zone 3 and the aerobic contact zone 4 are separated, and microorganisms in the two contact zones are not influenced by each other.

In addition, in order to deal with the condition that the quality of the sewage is unstable, in the embodiment, a gas stripping reflux device 16 is fixedly arranged at the aerobic contact zone 4, and the gas stripping reflux device 16 reflows part of water in the aerobic contact zone 4 to the separation zone 8 for treatment again. The air stripping reflux device 16 can be fixed by erecting a channel steel bracket above the device body and being supported by the channel steel bracket.

In this embodiment, a single-pass sewage treatment apparatus is shown, but the sewage treatment apparatus may be arranged in a row in each partition. However, compared with the single-return-stroke arrangement provided in the embodiment, the straight-line arrangement structure occupies a large space, and the laying length of the return pipe is long. In addition, the sewage treatment device can further adopt double-return-stroke or multi-return-stroke arrangement, so that the space is further saved.

The diversion area 7 is not necessary for the sewage treatment device, and when the diversion area 7 is not arranged, the sewage pipe 31 is directly communicated to the bottom of the inclined plate sedimentation area 1. Of course, the sewage treatment effect is not as good as that of the diversion area 7.

In order to further show the treatment effect of the sewage treatment device, the inventor carries out a sewage treatment experiment through the sewage treatment device.

The experimental sewage is taken from rural distributed sewage, and in order to verify the treatment effect of the device on the high-phosphorus wastewater, potassium dihydrogen phosphate is added into the original side ditch sewage to simulate the high-phosphorus sewage, and the pollutant indexes are shown in table 1.

TABLE 1 distributed index of pollutants in wastewater

TABLE 2 contaminant removal Rate

Table 2 shows the results of the sewage treatment experiment, which shows that the experimental apparatus has better treatment effect on both the distributed sewage and the high phosphorus sewage.

Any modification, replacement, improvement, extension and the like made based on the spirit and principles of the present invention are still within the scope of protection of the present invention.

Claims

1. An integrated sewage treatment device comprises a device body, and is characterized in that an inclined plate sedimentation zone (1), a separation zone (8), an anoxic contact zone (2), an anaerobic contact zone (3), a water distribution zone, an aerobic contact zone (4) and an adsorption filtration zone (5) are sequentially arranged in the device body along a sewage flow path;

the inclined plate sedimentation zone (1) and the separation zone (8) are separated by a first overflow plate (26), the separation zone (8) and the anoxic contact zone (2) are separated by a second partition plate (23), the anoxic contact zone (2) and the anaerobic contact zone (3) are separated by a second overflow plate (27), the anaerobic contact zone (3) and the water distribution zone are separated by a third partition plate (24), the water distribution zone and the aerobic contact zone (4) are separated by a fourth partition plate (25), and the aerobic contact zone (4) and the adsorption filtration zone (5) are separated by a third overflow plate (29);

the bottom of the second clapboard (23) is provided with a plurality of limber holes; the bottom of the third clapboard (24) is provided with a plurality of water pipes, and each water pipe is provided with a check valve (32) for preventing backflow; the whole plate of the fourth clapboard (25) is uniformly provided with water through holes; the upper parts of the first overflow plate (26), the second overflow plate (27) and the third overflow plate (29) are all provided with a plurality of water through holes;

the upper parts of the separation region (8), the anoxic contact region (2) and the anaerobic contact region (3) are sealed by a cover plate;

a sludge discharge pipe (6) is arranged on the side surface of the bottom of the inclined plate sedimentation zone (1), and a first valve is arranged on the sludge discharge pipe (6); a water pumping pipeline extends out of the bottom of the adsorption filtering area (5), and a water pumping pump (17) is connected to the water pumping pipeline; a modified active carbon filler (20) is arranged in the adsorption filtering area (5);

a plurality of combined soft fillers (19) are arranged in the anoxic contact zone (2), the anaerobic contact zone (3) and the aerobic contact zone (4), and microorganisms for water treatment grow on the combined soft fillers (19) in a film hanging manner;

the sewage enters an inclined plate sedimentation area (1) for sedimentation, is treated by three contact areas and is filtered by modified activated carbon filler (20) in an adsorption filtration area (5), and then is pumped out by a water pump (17).

2. The integrated sewage treatment device according to claim 1, wherein a horizontal permeable plate (33) is arranged in the adsorption filtering area (5) and is integrally connected with the inner wall surface of the filtering area (5) along the circumferential direction, and the filler barrel (21) is supported above the permeable plate (33); the filling barrel (21) is a cuboid barrel with an opening at the upper part, water seepage holes are uniformly formed at the periphery and the bottom of the filling barrel (21), and a lifting handle is integrally connected with the upper part of the filling barrel (21);

the modified activated carbon filler (20) is filled in the filler barrel (21), and the modified activated carbon filler (20) is a ferric trichloride modified activated carbon filler;

the aperture of the water seepage hole is smaller than the particle size of the modified activated carbon filler (20); the water pumping pipeline is positioned below the water permeable plate (33).

3. The integrated sewage treatment device according to claim 1, wherein a flow guide area (7) is further arranged in front of the inclined plate sedimentation area (1), the flow guide area (7) and the inclined plate sedimentation area (1) are separated by a first partition plate (22), a plurality of semicircular water through holes are formed in the bottom of the first partition plate (22), and sewage enters the inclined plate sedimentation area (1) from the plurality of semicircular water through holes.

4. The integrated wastewater treatment plant according to any of claims 1 to 3, wherein the wastewater treatment plant is of a "single pass" configuration, and wastewater is "deflected" from the anaerobic contact zone (3) through the water distribution zone into the aerobic contact zone (4).

5. The integrated sewage treatment device according to claim 4, wherein a partition plate (28) capable of being pulled up and down is arranged in the water distribution area, the partition plate (28) can divide the water distribution area into a first water distribution area (12) and a second water distribution area (13), the first water distribution area (12) and the anaerobic contact area (3) are separated by a third partition plate (24), and the second water distribution area (13) and the aerobic contact area (4) are separated by a fourth partition plate (25).

6. The integrated sewage treatment device according to claim 4, wherein stirrers for stirring the sewage are arranged in the anoxic contact zone (2), the anaerobic contact zone (3) and the aerobic contact zone (4).

7. The integrated sewage treatment device according to claim 6, wherein a plurality of aeration pipes (15) are uniformly laid at the bottom of the aerobic contact zone (4).

8. The integrated sewage treatment plant according to claim 6, wherein a heating thermostat bar (11) for heating sewage is further provided in the anaerobic contact zone (3).

9. The integrated wastewater treatment plant according to any of claims 5 to 8, further comprising a stripping reflux device (16) for refluxing a portion of the water in the aerobic contact zone (4) to the separation zone (8).

10. The integrated sewage treatment device according to claim 9, wherein the bottom of the adsorption filtration zone (5) is provided with a back washing port (18), the back washing port (18) is externally connected with a back washing pipe, and the back washing pipe is provided with a second valve; the upper part of the adsorption filtering area (5) is also connected with a flow guide pipe for discharging back washing water, and the flow guide pipe is provided with a third valve; the back washing port (18) is positioned below the water permeable plate (33).