CN205501033U - A compound improved generation purifier for distributed rural domestic sewage treatment system - Google Patents

Abstract

The utility model discloses a composite improved purification device used in a distributed rural domestic sewage treatment system; the inside of the purification tank is sequentially separated by a partition plate according to the flow direction of the sewage to form an anoxic tank, an anaerobic tank and an aerobic tank and precipitation disinfection tank; the outer surface of the upper part of the anoxic tank is provided with a waste water inlet, and the outer surface of the upper part of the precipitation disinfection tank is provided with a drain outlet, and the anoxic tank, anaerobic tank, aerobic tank and sedimentation disinfection tank pass through the sewage channel The aerobic tank is provided with a reflux device, and the reflux device leads to the anoxic tank through a pipeline. The front of the anoxic zone in the composite improved purification tank device of the utility model firstly meets the carbon source requirements of denitrification and removal of nitrate nitrogen in the anoxic pool, making the denitrification more complete; at the same time, it acts as a seal for the anaerobic tank , to solve the problems of the anaerobic pond's strict requirements on dissolved oxygen content and the impact of low content of nitrate nitrogen in the influent on the release of phosphorus, which is conducive to anaerobic phosphorus release and improves the effect of nitrogen and phosphorus removal.

Description

Composite improved purification device for decentralized rural domestic sewage treatment system

technical field

The utility model relates to a waste water treatment device, in particular to a composite improved purification device used in a distributed rural domestic sewage treatment system.

Background technique

With the rapid growth of my country's economy and the acceleration of urban integration, the living standards of villages and towns have been continuously improved, and the amount of domestic sewage produced in villages and towns has also increased day by day, and rural environmental problems have become increasingly prominent. Domestic sewage in villages and towns has become an important part of the source of sewage, and will become an important factor restricting the sustainable development of my country's rural economy and society and the improvement of rural water environment quality for a long time.

At present, my country's rural decentralized domestic sewage pollution discharge has accounted for "half of the country" in the country, and a number of small decentralized sewage treatment facilities - integrated purification tanks have been built one after another. The integrated septic tank is a relatively mature small-scale sewage treatment technology, which is essentially a technical combination composed of a series of unit treatment processes. Through reasonable space design, it integrates the functions of various parts of the traditional sewage treatment process, and is mainly composed of five units: pretreatment, biological treatment, sedimentation, disinfection, and sludge treatment. At present, the most widely used are two-stage anaerobic + one-stage aerobic process, anaerobic filter bed + contact oxidation process, anaerobic filter bed + biological filtration process, anaerobic + facultative oxygen + contact oxidation process, activated sludge process + MBR Process and other combined processes, there are also some processes that add effective microbial (ME) bacteria liquid in the biochemical reaction unit to enhance the effect of microorganisms in the system to enhance the treatment effect. Due to the low content of organic matter in urban sewage in my country, the carbon source Insufficient, the denitrification and denitrification in the traditional purification tank process is not ideal, and the nitrate nitrogen brought into the anaerobic zone by the return sludge makes the phosphorus-accumulating bacteria release insufficiently, which in turn affects the phosphorus-accumulating bacteria in the aerobic zone. Secondly, the operation of the purification tank currently used shows that the effluent water quality is unstable, and it is difficult to achieve a good synchronous denitrification and phosphorus removal effect; and it has the disadvantages of easy clogging and short service life.

Contents of the invention

The purpose of the utility model is to overcome the deficiencies of the existing traditional integrated purification tank, and provide a denitrification and dephosphorization effect, reasonable structure, good treatment effect, small floor area, low cost, convenient operation and management, not easy to block, easy to use Long-life composite improved purification device for decentralized rural domestic sewage treatment system.

The purpose of this utility model is achieved through the following technical solutions:

The utility model relates to a composite and improved purification device used in a distributed rural domestic sewage treatment system. The inside of the purification device is sequentially separated by partition plates according to the flow direction of sewage to form anoxic tank 1, anaerobic tank 2, aerobic tank Groove 3 and sedimentation disinfection tank 4; The outer side of described anoxic tank 1 top is provided with waste water inlet 6, and described precipitation disinfection tank 4 upper outer side is provided with water outlet 7, described anoxic tank 1, anaerobic tank 2 1. The aerobic tank 3 and the precipitation disinfection tank 4 are connected through a sewage channel; the aerobic tank 3 is provided with a backflow device 10, and the backflow device 10 leads to the anoxic tank 1 through a pipeline.

Preferably, the reflux ratio of the reflux device 10 is 75%;

Preferably, the anoxic tank 1, the anaerobic tank 2, and the aerobic tank 3 are respectively provided with a double-layer structure composite filler composed of an organic filler layer and an inorganic zeolite/expanded vermiculite filler layer.

Preferably, the anoxic tank 1 is provided with an anoxic tank composite filler 5 and a first diversion tank 17, and the upper part of the partition plate between the anoxic tank 1 and the anaerobic tank 2 is provided with a water hole 16, The first diversion groove 17 communicates with the water hole 16 ; the first diversion groove 17 runs through the anoxic tank composite filler 5 .

Preferably, the height of the composite filler 5 for the anoxic tank is 35-45% of the inner height of the anoxic tank 1 . More preferably, it is 40%.

Preferably, the anaerobic tank composite filler 14 and the second diversion tank 18 are provided in the anaerobic tank 2; In the water hole of the channel 11 , the second diversion tank 18 communicates with the aerobic tank channel 11 ; the second diversion tank 18 runs through the composite filler 14 of the anaerobic tank.

Preferably, the height of the composite filler 14 for the anaerobic tank is 55-65% of the inner height of the anaerobic tank 2 . More preferably, it is 60%.

Preferably, aerobic tank composite filler 15 and aeration device 9 are also provided in the aerobic tank 3, and the aeration device 9 is arranged below the aerobic tank composite filler 15; Groove 4 communicates through the bottom of the partition plate.

Preferably, the height of the composite filler 15 in the aerobic tank is 45-55% of the inner height of the aerobic tank 3 . More preferably, it is 50%.

Preferably, the upper part of the sedimentation disinfection tank 4 is provided with an overflow tank 19 connected to the outlet 7, the front end of the outlet 7 is provided with an overflow weir, and the end of the overflow weir is provided with a disinfection box.

Preferably, the bottoms of the anoxic tank 1, the anaerobic tank 2, and the aerobic tank 3 are respectively provided with a sewage outlet 8; Manholes 13 are respectively arranged on the top.

Preferably, the top of the anoxic tank 1 is provided with a sampling port.

Preferably, the purification device adopts a glass fiber reinforced plastic circular tank.

Compared with the prior art, the utility model has the following beneficial effects:

1. The front of the anoxic zone firstly meets the carbon source requirements of denitrification and removal of nitrate nitrogen in the anoxic tank, making the denitrification more complete; at the same time, it plays a sealing role for the anaerobic tank, which solves the problem of the anaerobic tank for dissolved oxygen. The content requirements are relatively strict and the impact of low content of nitrate nitrogen in the influent on the release of phosphorus is beneficial to anaerobic phosphorus release and improves the effect of nitrogen and phosphorus removal.

2. The use of double-layer structure composite filler composed of organic filler layer and inorganic zeolite/expanded vermiculite filler layer reduces the nitrogen and phosphorus content in each tank and improves the removal rate of pollutants.

3. It is made of high-quality material and high-strength glass frit steel compound, which has the advantages of tensile resistance, compression resistance, corrosion resistance, impact resistance, high strength and long service life.

4. The ability to resist impact load is strong, the effluent water quality is stable, the sludge output is small, and the operation and management are simple.

5. Simple process, small footprint, low cost,

Description of drawings

Fig. 1 is a kind of structural representation of the composite improved purification device that is used for decentralized rural domestic sewage treatment system of the present utility model;

Among them, 1 is the anoxic tank, 2 is the anaerobic tank, 3 is the aerobic tank, 4 is the sedimentation disinfection tank, 5 is the composite filler of the anoxic tank, 6 is the waste water inlet, 7 is the drain outlet, 8 is the sewage outlet, 9 is an aeration device, 10 is a reflux device, 11 is an aerobic tank channel, 12 is a sampling port, 13 is a manhole, 14 is an anaerobic tank composite filler, 15 is an aerobic tank composite filler, 16 is a water hole, and 17 is a The first diversion groove, 18 is the second diversion groove, and 19 is the overflow groove.

detailed description

Below in conjunction with embodiment the utility model is described in detail. The following examples will help those skilled in the art to further understand the utility model, but do not limit the utility model in any form. It should be noted that those skilled in the art can make some adjustments and improvements without departing from the concept of the present utility model. These all belong to the protection domain of the present utility model.

The utility model relates to a new purification tank device for domestic sewage treatment in rural areas. On the basis of the traditional purification tank, the tank is divided into four compartments, and the sewage purification tank is sequentially separated into anoxic tank, anaerobic tank, aerobic tank and There are four spaces in the precipitation disinfection tank. The fluid flows naturally by the liquid level difference in each reaction zone, without any power, and connecting pipelines are set up between each grid, and different water absorption depths and drainage depths are set to prevent sludge from flowing into each other. This is not only conducive to improving the volume utilization rate of the entire purification tank, but also can relatively independently cultivate microbial communities suitable for each tank environment in different tanks, so that different ecological strains can be maintained in each grid tank, which is beneficial to the growth of various microorganisms It grows steadily, and can also resist shock loads well, and the removal rate of pollutants is further improved.

In order to save space, material and energy consumption, the spatially integrated technology is adopted to integrate the anoxic tank, anaerobic tank, aerobic tank and sedimentation disinfection tank into one, and the two areas share one wall to achieve small and efficient results. The basic structure of the septic tank device is shown in Figure 1. It can be seen from Figure 1 that the technological process is as follows: the sewage passing through the regulating tank first enters the anoxic tank, then enters the anaerobic tank, then enters the aerobic tank, and finally enters the sedimentation disinfection tank, and part of the effluent and sludge pass through the reflux device (reflux ratio 75%) into the anoxic tank, and the effluent is discharged after sedimentation, filtration and disinfection reach the standard.

The composite filler is composed of inorganic zeolite with good adsorption to ammonia nitrogen and expanded vermiculite with good adsorption to phosphate in a certain proportion, and is connected with organic filler to realize the optimal combination of inorganic filler and organic filler. The details of each tank are as follows:

The anoxic tank is equipped with 40% composite filler, mainly for the anoxic denitrification reaction, which improves the removal rate of TN, creates conditions for the subsequent anaerobic tank, and improves the biodegradability of sewage.

The anaerobic tank is equipped with 60% composite filler, and anaerobic biofilm grows on the filler, which removes soluble organic matter through hydrolysis and acidification, improves the biodegradability of sewage, and is beneficial to subsequent aerobic treatment.

The aerobic tank adopts contact oxidation process, equipped with gas distribution device and 50% composite filler, relying on the oxidation and decomposition of microorganisms in the biofilm attached to the reactor, the adsorption and retention of filler and biofilm, and the food chain formed along the direction of water flow Gradation capture, as well as nitrification in the microenvironment and anaerobic section inside the biofilm, remove the concentration of various pollutants. The air in the aerobic pool is provided by the fan, and the pool uses a new type of composite filler, which has a large surface area ratio, long service life, easy to hang film, and corrosion resistance. , no aging, not easy to block, long service life and other advantages.

In the sedimentation tank, the upper clarified water flows into the overflow tank, and the sedimented sludge falls on the inclined plate and slides into the aerobic tank, increasing the generation time of nitrifying bacteria and increasing the nitrification rate. A disinfection box is installed at the end of the overflow weir, and a solid chlorine-containing disinfectant is installed inside, which is discharged after disinfection.

See the following examples for specific applications:

Example

As shown in Figure 1, a compound improved purification device for decentralized rural domestic sewage treatment system. The equipment is made of welded glass fiber reinforced plastic, with an overall size of 2000×1100m×1400mm and a residence time of 2.0d. The equipment is composed of anoxic tank 1, anaerobic tank 2, aerobic tank 3 and precipitation disinfection tank 4. The cross-sectional shape of the entire tank body is a circular tank, with waste water inlet 6 and drain outlet 7, sampling port 12 and manhole 13 at the top, sewage outlet 8 at the bottom, anoxic tank 1, anaerobic tank 2 and aerobic tank 3 as Circular structure (can also be square structure), aeration device 9 (aerator), reflux device 10 and aerobic tank channel 11 are arranged in aerobic tank 3, and anoxic tank composite filler is arranged in anoxic tank 1 5. The anaerobic tank 2 is equipped with an anaerobic tank composite filler 14, and the good oxidation tank 3 is equipped with a good oxidation tank composite filler 15.

Specifically, the outer surface of the upper part of the anoxic tank 1 is provided with a waste water inlet 6, the bottom of the anoxic tank 1 is provided with a sewage outlet 8, and the top is provided with a sampling port 12 and a manhole 13; Filler 5 and the first diversion tank 17, the top of the partition plate between the anoxic tank 1 and the anaerobic tank 2 is provided with a water hole 16, and the first diversion tank 17 communicates with the water hole 16; The first diversion groove 17 runs through the anoxic tank composite filler 5 ; the height of the anoxic tank composite filler 5 is 40% of the inner height of the anoxic tank 1 .

The bottom of the anaerobic tank 2 is provided with a sewage outlet 8, and the top is provided with a manhole 13; the anaerobic tank 2 is provided with an anaerobic tank composite filler 14 and a second diversion tank 18; between the anaerobic tank 2 and the aerobic tank 3 The top of the partition plate is provided with a water hole leading to the aerobic tank channel 11, the second diversion tank 18 communicates with the aerobic tank channel 11, and the second diversion tank 18 runs through the anaerobic tank composite filler 14; the anaerobic tank composite The height of the filler 14 is 60% of the height in the anaerobic tank 2;

The bottom of the aerobic tank 3 is provided with a sewage outlet 8, and the top is provided with a manhole 13; the aerobic tank 3 is provided with an aerobic tank composite filler 15, an aeration device 9 and a return device 10; the aeration device 9 is located in the aerobic tank composite Below the filler 15, the reflux device 10 leads to the top of the anoxic tank 1 through the pipeline, and the aerobic tank 3 and the precipitation disinfection tank 4 are connected through the bottom of the partition plate; %;

The top of the precipitation disinfection tank 4 is provided with a manhole 13, the upper part of the tank is provided with an overflow tank 19, and the outer surface of the upper part is provided with a drain outlet 7 communicating with the overflow tank 19; the front end of the drain outlet 7 is provided with an overflow weir, and the end of the overflow weir is provided The disinfection box is equipped with a solid chlorine-containing disinfectant inside, and the water is drained after disinfection;

The anoxic tank composite filler 5, the anaerobic tank composite filler 14 and the aerobic tank composite filler 15 all adopt a double-layer structure composite filler composed of an organic filler layer and an inorganic zeolite/expanded vermiculite filler layer;

The process flow is: the waste water enters the anoxic tank 1 from the wastewater inlet 6, passes through the anoxic tank composite filler 5 from top to bottom, and then enters the anaerobic tank 2 through the first diversion tank 17 and the water hole 16, and then enters the anaerobic tank 2 from top to bottom. After passing through the anaerobic tank composite filler 14, pass through the second diversion tank 18 and the aerobic tank channel 11, enter the aerobic tank 3, pass through the aerobic tank composite filler 15, and simultaneously carry out aeration and biochemical treatment of the wastewater through the aerator 9, Among them, the sludge backflow passes through the backflow device 10, and the sludge backflow is carried out from the aerobic tank 3 to the anoxic tank 1, and the reflux ratio is 75%; the sewage finally enters the sedimentation disinfection tank 4, and the upper clarified water flows into the overflow tank 19 through the drain 7 discharge. The sludge in the anoxic tank 1, the anaerobic tank 2 and the aerobic tank 3 is respectively discharged from the sewage outlet 8 arranged at the bottom thereof.

The composite improved purification tank device of this embodiment is applied to treat rural life in a certain town, and the implementation results: the influent water quality of wastewater in the rural life of this town is shown in Table 1, and the designed water quality of the effluent after sewage treatment is implemented in the "Pollutant Discharge of Urban Sewage Treatment Plants" "Standard" (GB18918-2002) Class 1 B emission standard. It can be seen from Table 1 that the composite improved septic tank device of the present invention has good processing capacity, and the water quality of the treated water satisfies the standard requirements very well.

Table 1 Wastewater Design Inlet and Outlet Water Quality Unit: mg/L except pH

serial number pH CODcr BOD Ammonia nitrogen TN TP SS Influent water quality 6-9 500 250 40 60 4 150 Water quality 6-9 60 20 8(15) 20 1 20 Removal rate 88% 92% 62.5% 66.7% 75% 90%

The specific embodiments of the present utility model have been described above. It should be understood that the utility model is not limited to the above-mentioned specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the utility model.

Claims (10)

1. the convergent improvement type purifier for distributed sewage treatment system for rural life, it is characterized in that, the inside of described purifier is separated to form anoxia groove (1), anaerobism groove (2), aerobic slot (3) and precipitation disinfection trough (4) successively according to the partition panel that flows through of sewage；The lateral surface on described anoxia groove (1) top is provided with waterwater entrance (6), described precipitation disinfection trough (4) upper outside face is provided with discharge outlet (7), and described anoxia groove (1), anaerobism groove (2), aerobic slot (3) are connected by passage with precipitation disinfection trough (4)；Being provided with reflux (10) in described aerobic slot (3), described reflux (10) leads to anoxia groove (1) by pipeline.

Convergent improvement type purifier for distributed sewage treatment system for rural life the most according to claim 1, it is characterized in that, be respectively equipped with, in described anoxia groove (1), anaerobism groove (2), aerobic slot (3), the double-decker compounded mix being made up of organic filler layer and inorganic zeolite or expanded vermiculite packing layer.

Convergent improvement type purifier for distributed sewage treatment system for rural life the most according to claim 1, it is characterized in that, anoxia groove compounded mix (5) and the first guiding gutter (17) it is provided with in described anoxia groove (1), partition panel top between described anoxia groove (1) and anaerobism groove (2) is provided with limbers (16), and the first guiding gutter (17) is connected with limbers (16)；Described first guiding gutter (17) runs through anoxia groove compounded mix (5).

Convergent improvement type purifier for distributed sewage treatment system for rural life the most according to claim 3, it is characterised in that the height of described anoxia groove compounded mix (5) is high by 35～45% in anoxia groove (1).

Convergent improvement type purifier for distributed sewage treatment system for rural life the most according to claim 1, it is characterized in that, in described anaerobism groove (2), be provided with anaerobism groove compounded mix (14) and the second guiding gutter (18)；Partition panel top between described anaerobism groove (2) and aerobic slot (3) is provided with the limbers leading to aerobic slot passage (11), and the second guiding gutter (18) is connected with aerobic slot passage (11)；Described second guiding gutter (18) runs through anaerobism groove compounded mix (14).

Convergent improvement type purifier for distributed sewage treatment system for rural life the most according to claim 5, it is characterised in that the height of described anaerobism groove compounded mix (14) is high by 55～65% in anaerobism groove (2).

Convergent improvement type purifier for distributed sewage treatment system for rural life the most according to claim 1, it is characterized in that, being additionally provided with aerobic slot compounded mix (15) and aerator (9) in described aerobic slot (3), aerobic slot compounded mix (15) lower section is located at by described aerator (9)；Described aerobic slot (3) is connected by below partition panel with precipitation disinfection trough (4).

Convergent improvement type purifier for distributed sewage treatment system for rural life the most according to claim 7, it is characterised in that the height of described aerobic slot compounded mix (15) is high by 45～55% in aerobic slot (3).

Convergent improvement type purifier for distributed sewage treatment system for rural life the most according to claim 1, it is characterized in that, described precipitation disinfection trough (4) internal upper part is provided with the overflow launder (19) being connected with described discharge outlet (7), described discharge outlet (7) front end is provided with overfalling weir, and described overfalling weir end is provided with disinfection box.

Convergent improvement type purifier for distributed sewage treatment system for rural life the most according to claim 1, it is characterised in that described purifier uses fiberglass circular groove.