CN211813996U - Bury formula sewage treatment device - Google Patents

Abstract

The utility model discloses a bury formula vertical sewage treatment device. The utility model discloses mainly including control box, equipment room, anaerobism pond, oxygen deficiency pond, good oxygen pond, ultrafiltration membrane pond, every control chamber looks UNICOM, the equipment bottom is equipped with a water inlet, and the equipment top is equipped with a delivery port, and equipment is intake from the bottom, and sewage loops through the anaerobism pond, oxygen deficiency pond, good oxygen pond, discharge from the delivery port after the ultrafiltration membrane pond at last. The utility model discloses equipment reduces the energy consumption by a wide margin, and area is saved by a wide margin to new-type milipore filter use, and sewage treatment is effectual, and gas utilization is rateed highly. The sewage can be degraded in each operation chamber, and the water outlet reaches the discharge standard.

Description

A buried sewage treatment equipment

technical field

The utility model relates to the technical field of sewage treatment, in particular to a buried sewage treatment equipment.

Background technique

With the rapid development of my country's economy and the continuous improvement of rural living standards, people's awareness of environmental protection has become stronger and stronger. The 19th National Congress put forward the strategy of rural revitalization to create ecologically livable villages, and the treatment of domestic sewage in rural areas has been raised. schedule. According to relevant statistics, there are 9 billion tons of domestic sewage generated in rural areas of the country every day, and most of these sewage are directly discharged into the nature without relevant treatment, causing great pollution and damage to the nature. Living in the countryside, the treatment of rural domestic sewage has important strategic significance.

Rural domestic sewage is very scattered, it is difficult to collect sewage, there is basically no sewage treatment equipment, the concentration of domestic sewage is low, the variation range is relatively large, the quality of domestic sewage is not much different, the biodegradability is strong, the individual water volume is small, and the daily variation coefficient is large. There may even be interruptions, so special treatment equipment is required for these rural sewage characteristics.

Utility model content

The problem to be solved by the present invention is to overcome the above-mentioned blanks in the prior art and provide a buried vertical sewage treatment equipment.

In order to solve the above-mentioned problems, the scheme of the present utility model is:

The equipment has an integrated structure, including an anaerobic tank, an anoxic tank, an aerobic tank and a membrane tank arranged in sequence from bottom to top;

The water inlet pipe provided with the water inlet centrifugal pump is connected to the water inlet at the lower part of the anaerobic tank, and a stirring system is installed in the anaerobic tank;

The anoxic tank and the anaerobic tank are separated by a first layer of movable partitions. One end of the first layer of movable partitions is connected to the inner wall of the equipment through hinges, and the other end is provided with a support to prevent the partitions from sinking. The anoxic tank is filled with Filled with porous filler balls, the bottom of the anoxic tank is equipped with a first layer of perforated aeration pipes for continuous aeration;

The aerobic pool and the anoxic pool are separated by a second layer of movable partitions, (one end of the second layer of movable partitions is connected to the inner wall of the equipment through hinges, and the other end is provided with a support to prevent the partitions from sinking. It is filled with porous filler balls, which increases the contact area of activated sludge. When the sewage enters the aerobic tank, it can react better. A second layer of perforated aeration pipes are installed at the bottom of the aerobic tank for continuous aeration.

The membrane tank and the aerobic tank are separated by movable perforated partitions. One end of the third layer of movable perforated partitions is connected with the inner wall of the equipment through hinges, and the other end is provided with a support to prevent the partitions from sinking. Ultrafiltration membranes are placed in the membrane tank. ; The installation of the second layer of perforated aeration pipes at the bottom of the membrane tank requires continuous aeration, and the water outlet at the upper part of the membrane tank is connected to the water outlet pipe provided with the water outlet centrifugal pump;

The blower is respectively connected to the first layer of perforated aeration pipes, the second layer of perforated aeration pipes and the second layer of perforated aeration pipes through the air paths provided with the first intake valve, the second intake valve and the third intake valve;

The anaerobic pool, the anoxic pool, the aerobic pool and the membrane pool are respectively connected through the mud pipelines provided with the first mud valve, the second mud valve, the third mud valve and the fourth mud valve. The mud main valve and the mud main pipe of the mud pump;

The equipment is provided with a control box installed with a PLC control system, and the PLC control system controls the above-mentioned valves and water pumps respectively.

The stirring system is a stirring paddle driven by a motor.

A curtain ultrafiltration membrane is placed in the membrane tank, and the curtain ultrafiltration membrane is placed flat in the membrane tank.

PLC control system adopts S7-1200.

The beneficial effects of the present utility model are:

The above-mentioned buried vertical sewage treatment equipment, anaerobic pond, anoxic pond, aerobic pond and membrane pond, although each process pond has its own independent operating space, but they are interconnected, and the activity in the membrane pond The sludge is returned to the other three tanks respectively, which provides good growth conditions for the activated sludge in the other three tanks. The final ultrafiltration membrane process separates the sludge and water well, avoiding the loss of sludge, and the system does not need to be reused. Activated sludge is replenished from the outside, and the rural domestic sewage is treated to meet the discharge standard, which can be directly discharged into the natural water body.

Compared with other sewage treatment equipment, the above-mentioned buried vertical sewage treatment equipment has the following advantages:

① This equipment is very simple in processing technology, with short process and strong practicability.

② Simultaneous nitrogen and phosphorus removal, the total hydraulic retention time of the equipment is less than other traditional processes, and the effluent turbidity is low.

③ During the operation of the equipment, sludge expansion is not easy to occur, and the SVI value is less than 100.

④ There is no need to add chemicals in the operation process, only stirring is used in the anaerobic tank, and a small amount of aeration is used in the anoxic tank, so the equipment operating cost is low.

⑤ Fully automatic operation, simple operation, unattended and remote monitoring.

⑥High degree of integration, small maintenance workload, simple maintenance and low requirements.

Description of drawings

Figure 1 is a schematic structural diagram of a buried vertical sewage treatment equipment of the present invention.

Detailed ways

The device of the present invention will be further described below with reference to specific embodiments.

As shown in Figure 1, a buried vertical sewage treatment equipment includes a control box, an equipment room, an anaerobic tank, an anoxic tank, an aerobic tank, and an ultrafiltration membrane tank. The water pipe is connected to the water inlet at the lower part of the anaerobic tank, and a stirring system is installed in the anaerobic tank; the anoxic tank and the anaerobic tank are separated by a first layer of movable partitions, and one end of the first layer of movable partitions is connected to the inner wall of the equipment through a joint. The other end is provided with a support to prevent the separator from sinking, the anoxic tank is filled with porous filler balls, and the bottom of the anoxic tank is equipped with a first layer of perforated aeration pipes for continuous aeration; between the aerobic tank and the anoxic tank Separated by the second layer of movable partitions, (one end of the second layer of movable partitions is connected with the inner wall of the equipment through hinges, and the other end is provided with a support to prevent the partitions from sinking, and the aerobic pool is filled with porous filler balls, increasing the The contact area of activated sludge, when the sewage enters the aerobic tank, can react better. A second layer of perforated aeration pipes are installed at the bottom of the aerobic tank for continuous aeration. The perforated partition is separated, one end of the third layer of movable perforated partition is connected with the inner wall of the equipment through a hinge, and the other end is provided with a support to prevent the partition from sinking. Ultrafiltration membrane is placed in the membrane tank; the bottom of the membrane tank is installed with a second layer of perforated exposure The air pipe needs continuous aeration, and the water outlet on the upper part of the membrane tank is connected to the water outlet pipe provided with the water outlet centrifugal pump; The layer perforated aeration pipe, the second layer of perforated aeration pipe and the second layer of perforated aeration pipe; the anaerobic tank, anoxic tank, aerobic tank and membrane tank are respectively provided with the first mud valve and the second mud valve. The mud pipeline of the valve, the third mud valve and the fourth mud valve is connected to the mud main pipe with the mud main valve and the mud pump; the equipment is provided with a control box installed with a PLC control system, and the PLC control systems are respectively Control the above valves and water pumps.

The control box is the operation platform of the whole equipment. Because the whole equipment can realize automatic operation, it is necessary to control the electrical equipment such as the valves and water pumps of the equipment. The control system adjusts and sets the process of the whole equipment through PLC. The operating parameters are also transmitted by means of the control box.

Anaerobic tank, this is the first process tank where the sewage enters the equipment. The anaerobic tank is the first process of sewage treatment. After the added activated sludge is cultured, the equipment adjusts the dissolved oxygen value of the sludge, basically Keep the value of dissolved oxygen at zero, the activated sludge is continuously stirred by the stirring paddle to prevent natural sedimentation, combined with the activated sludge mixed liquid returning from the membrane tank at the top of the equipment, fully contact with the sewage, and utilize the anaerobic acid in the activated sludge. The growth of microorganisms, adsorption and degradation of organic matter, and hydrolysis of high molecular organic matter into small molecular organic matter, at this stage, anaerobic microorganisms release phosphorus and at the same time ammonify some organic matter, COD and BOD in domestic sewage have decreased in this link. This stage is to provide reaction conditions for the next stage of the process. When the COD nutritional value of the influent is low, the activated sludge in this process section cannot be metabolized normally. Add device, through the addition of carbon source, to meet the normal growth needs of activated sludge.

In the anoxic tank, after the sewage passes through the anaerobic tank, it passes through the set diagonal channel, so that the sewage and the activated sludge can have a long and uniform contact reaction as much as possible. The anoxic tank is filled with circular porous fillers. The purpose of installing filler balls in this process section is to allow activated sludge to better adhere to it, increase the contact area between activated sludge and sewage, and provide a better solution for activated sludge degradation. In addition, each porous filler ball can be regarded as a small biochemical base station. There are filled sponge blocks inside the filler ball, which further improves the performance of the activated sludge film hanging. The material of the filler is polyurethane spherical material. The specific gravity is close to that of water, and the porosity is high, which is conducive to biofilm formation, so it is an ideal biochemical filler material. The bottom of the anoxic tank is evenly distributed with perforated aeration pipes for continuous micro-aeration. The continuous micro-aeration is to make the dissolved oxygen in the water meet the operating requirements of this process section. In this process section, the nitrogen in the sewage is degraded at this stage. The diagonal angle between the inlet water and the outlet water of the process section is also to make the sewage and activated sludge have a longer and more uniform contact reaction.

In the aerobic tank, after the sewage passes through the anoxic tank, the sewage reaches the aerobic tank through the outlet set at the top of the anoxic tank. The aerobic tank is also filled with circular porous fillers like the anoxic tank, and its function is similar to that of the anoxic tank. , But at this stage, the filler ball also has another function, which is to cut the air bubbles, because the perforated aeration pipes are evenly arranged at the bottom of the aerobic tank, the aeration volume is relatively large, the air bubbles are large, the utilization rate of the gas is low, and the large air bubbles are not conducive to The gas is dissolved and utilized by the activated sludge, and the filler ball will divide the large air bubbles into small air bubbles, improve the utilization rate of oxygen, and make the activated sludge react better with the sewage. The reaction of this process section is multifunctional, removing BOD, COD, ammonia nitrogen and other indicators, nitrification and absorption of phosphorus are carried out in the aerobic tank, and the activated sludge is also refluxed from this process section.

Ultrafiltration membrane tank, this process is the last processing step of the whole set of equipment, the curtain ultrafiltration membrane is placed in the membrane tank, and the curtain ultrafiltration membrane should be placed flat in the membrane tank, which can greatly reduce the height and floor space of the equipment , Placing the membrane modules horizontally can also reduce the pollution of the membrane modules. The bottom of the membrane pool is evenly installed with a perforated air pipe for continuous aeration and a large amount of continuous aeration. The purpose of aeration is to prevent the fouling of the ultrafiltration membrane. The purpose of the separator is to allow the aeration of the aerobic pool at the bottom to float up from the hole in the middle of the separator, so that the ultrafiltration membrane can be flushed with the air coming up, which can reduce the air consumption of the ultrafiltration membrane itself, greatly Reduced energy consumption. The ultrafiltration membrane tank mainly separates the muddy water. Through the ultra-high interception performance of the ultrafiltration membrane, the activated sludge is trapped in the membrane tank and will not be discharged with the produced water. It replaces the secondary sedimentation tank in the traditional process, and Compared with the traditional secondary sedimentation tank, the mud-water separation effect is more stable and more thorough, and this process section also has a certain reduction effect on COD and ammonia nitrogen indicators.

In this set of equipment, each treatment tank is connected to each other, and the treatment effect of each treatment tank determines the final effluent effect of the equipment. This set of equipment has a simple process and is the simplest denitrification and phosphorus removal process in terms of treatment effect. The operation is simple, the total hydraulic retention time is less than that of other similar equipment, and there is no need for chemical injection during the operation of the equipment, anaerobic tank stirring, and a small amount of aeration in the sampling tank. , in order not to increase dissolved oxygen, the combination of aerobic tank and membrane tank greatly reduces the operating cost. The equipment has strong adaptability, and the three pools of the equipment can be dosed with chemicals. If the activated sludge treatment requirements cannot be met due to the water quality problem, the equipment can be artificially added to promote the normal operation of the equipment and the treatment reaches the target.

Example 1

Taking domestic sewage in a rural area in Tianjin as an example, the villager discharges 150 tons of domestic sewage per day. Three sewage treatment plants are set up in the village, and the average treatment capacity of each treatment device is 50 tons per day. The water quality is relatively stable, and the water quantity is sufficient as an example to illustrate.

The influent water of the village is continuously monitored, the COD content is between 100-200mg/L, the BOD content is between 50-100mg/L, the total nitrogen content is between 15-30mg/L, and the ammonia nitrogen is between 17-40mg/L The total phosphorus is between 1-5mg/L and the pH is between 7.2-8.4. After calculation, the BOD/COD ratio of the water quality is about 0.5, and the biodegradability is good, indicating that biological methods can be used to remove organic matter. The ratio of BOD/TN is about 0.33, and the carbon source is basically sufficient. If it is detected that the carbon source is insufficient during the operation, another carbon source can be added through the equipment. BOD/TP greater than 20, suitable for biological phosphorus removal. The effluent indicators are required to meet the Class C standard of "Pollution Discharge Standards for Urban Sewage Treatment Plants". Based on the above indicators, it is determined that the operation process of the equipment fully meets the processing requirements.

水力停留时间2.3h，好氧池有效容积5.75m³，填料体积16m3,填料规格

水力停留时间2.87h，生化段总停留时间7.45h。超滤膜池污泥浓度控制在6000-10000mg/L之间，污泥回流比设置400％。超滤膜产水设定2.5m³/h。设备开始运行后，为了更快的让微生物挂膜，缩短培养时间，直接从附近污水厂拉过来活性污泥，直接投加，培养时间15天左右。培养污泥过程中，调节厌氧池DO基本保持在0mg/L，最大不超过0.1mg/L,搅拌桨随着进水不断搅动，防止活性污泥自由沉降。缺氧池通过穿孔曝气管连续微量曝气，调整曝气量，防止污泥自由沉降变成死泥，保持缺氧池内的DO在0.3mg/L左右，不超过0.5mg/L。好氧池通过穿孔曝气管连续不断的曝气，防止污泥自由沉降变成死泥，保持DO在1-3mg/L，过高的DO值在该阶段意义不大，还增加了能耗。超滤膜池横向放置超滤膜13帘，设置通量10LMH，膜池低均匀分布穿孔曝气管，通过连续不断的曝气，设置曝气量65m³/h，由于超滤膜底部用的是穿孔隔板，所以好氧池内的气体可以通过孔道上浮到超滤膜池，为超滤膜增加了曝气量，曝气量的增加减少了超滤膜的污染速率，并且减少了一部分能耗，超滤膜运行稳定，出水水质稳定，出水SS都在5mg/L以下。设备调试好后，稳定运行，对设备进水和出水进行连续30天的监测，在进水条件满足进水要求，与设备运行前调研的水质条件相符的情况下，设备出水COD含量在20-30mg/L之间，BOD含量在5mg/L以下，总氮含量在0.3mg/L以下，氨氮在3mg/L以下，总磷0.3mg/L之间，pH在7.2-8.3之间。出水指标满足《城镇污水处理厂污染物排放标准》DB12/599-2015中C类标准。The equipment is buried at the bottom with ventilation openings and manholes. The green lawn is made on the ground. The front end of the equipment is equipped with a regulating pool and a filter screen. The effective volume of the regulating pool is greater than 36m ³ , and the water retention time of the regulating pool is greater than 17h. After that, it is sucked by the inlet pump to the water inlet of the equipment. The effective volume of the equipment anaerobic tank is 4.6m ³ , the hydraulic retention time is 2.3h, the effective volume of the anoxic tank is 4.6m ³ , the packing volume is 16m ³ , and the packing specifications

The hydraulic retention time is 2.3h, the effective volume of the aerobic tank is ^5.75m3 , the packing volume is 16m3, and the packing specifications

The hydraulic retention time is 2.87h, and the total retention time of the biochemical section is 7.45h. The sludge concentration of the ultrafiltration membrane tank is controlled between 6000-10000mg/L, and the sludge return ratio is set to 400%. Ultrafiltration membrane permeate water is set at 2.5m ³ /h. After the equipment starts to operate, in order to make the microorganisms hang on the film faster and shorten the cultivation time, the activated sludge is directly pulled from the nearby sewage plant and added directly. The cultivation time is about 15 days. During the process of culturing the sludge, the DO of the anaerobic tank is basically kept at 0 mg/L, and the maximum is not more than 0.1 mg/L. The stirring paddle is continuously stirred with the influent water to prevent the free sedimentation of the activated sludge. The anoxic tank is continuously micro-aerated through the perforated aeration pipe to adjust the aeration amount to prevent the sludge from free sedimentation and become dead sludge, and keep the DO in the anoxic tank at about 0.3mg/L, not exceeding 0.5mg/L. The aerobic tank is continuously aerated through the perforated aeration pipe to prevent the sludge from free sedimentation and become dead sludge, keeping the DO at 1-3mg/L. Too high DO value is not significant at this stage, and it also increases the energy consumption. . The ultrafiltration membrane tank is placed horizontally with 13 curtains of ultrafiltration membranes, and the flux is set to 10LMH. The perforated aeration pipes are evenly distributed in the membrane tank. Through continuous aeration, the aeration rate is set to 65m ³ /h. It is a perforated separator, so the gas in the aerobic tank can float to the ultrafiltration membrane tank through the pores, which increases the aeration amount for the ultrafiltration membrane. The increase in the aeration amount reduces the pollution rate of the ultrafiltration membrane and reduces part of the energy. The ultrafiltration membrane runs stably, the effluent quality is stable, and the effluent SS is below 5mg/L. After the equipment is debugged, run stably, and monitor the inflow and outflow of the equipment for 30 consecutive days. If the inflow conditions meet the requirements of water inflow and are in line with the water quality conditions investigated before the operation of the equipment, the COD content of the equipment effluent is 20- Between 30mg/L, BOD content below 5mg/L, total nitrogen content below 0.3mg/L, ammonia nitrogen below 3mg/L, total phosphorus between 0.3mg/L, pH between 7.2-8.3. The effluent indicators meet the Class C standard in "Pollutant Discharge Standard for Urban Sewage Treatment Plants" DB12/599-2015.

The above detailed description of the buried vertical sewage treatment equipment with reference to the embodiments is illustrative rather than restrictive, and several embodiments can be listed according to the limited scope, so without departing from the present utility model Changes and modifications under the general concept should fall within the protection scope of the present invention.

Claims (4)

1. The utility model provides a bury formula sewage treatment device which characterized in that: the device is of an integrated structure and comprises an anaerobic tank, an anoxic tank, an aerobic tank and a membrane tank which are arranged from bottom to top in sequence;

a water inlet pipe provided with a water inlet centrifugal pump is connected with a water inlet positioned at the lower part of the anaerobic tank, and a stirring system is arranged in the anaerobic tank;

the anaerobic tank is separated from the anoxic tank by a first layer of movable partition plate, one end of the first layer of movable partition plate is connected with the inner wall of the equipment by a hinge, the other end of the first layer of movable partition plate is provided with a support for preventing the partition plate from sinking, the anoxic tank is filled with porous filler balls, and the bottom of the anoxic tank is provided with a first layer of perforated aeration pipes for continuous aeration;

the aerobic tank and the anoxic tank are separated by a second layer of movable partition plate, one end of the second layer of movable partition plate is connected with the inner wall of the equipment by a hinge, the other end of the second layer of movable partition plate is provided with a support for preventing the partition plate from sinking, the aerobic tank is filled with porous filler balls, the contact area of activated sludge is increased, when sewage enters the aerobic tank, the sewage can better react, the bottom of the aerobic tank is provided with a second layer of perforated aeration pipes for continuous aeration,

the membrane tank and the aerobic tank are separated by a third layer of movable perforated partition plate, one end of the third layer of movable perforated partition plate is connected with the inner wall of the equipment through a hinge, the other end of the third layer of movable perforated partition plate is provided with a support for preventing the partition plate from sinking, and an ultrafiltration membrane is placed in the membrane tank; a second layer of perforated aeration pipe is arranged at the bottom of the membrane pool and needs continuous aeration, and a water outlet at the upper part of the membrane pool is connected with a water outlet pipe provided with a water outlet centrifugal pump;

the air blower is respectively connected with the first layer of perforated aeration pipe, the second layer of perforated aeration pipe and the second layer of perforated aeration pipe through air paths provided with a first air inlet valve, a second air inlet valve and a third air inlet valve;

the anaerobic tank, the anoxic tank, the aerobic tank and the membrane tank are respectively connected with a line mud main pipe provided with a line mud total valve and a mud pump through a line mud pipe provided with a first line mud valve, a second line mud valve, a third line mud valve and a fourth line mud valve;

the equipment is provided with a control box provided with a PLC control system, and the PLC control system respectively controls the valves and the water pumps.

2. The buried sewage treatment plant of claim 1, wherein: the stirring system is a stirring paddle driven by a motor.

3. The buried sewage treatment plant of claim 1, wherein: and a curtain type ultrafiltration membrane is placed in the membrane pool and is horizontally placed in the membrane pool.

4. The buried sewage treatment plant of claim 1, wherein: the PLC control system adopts a central processing unit S7-1200.

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