CN206915929U - A kind of Peasants Joy sewage-treatment plant - Google Patents

Abstract

The utility model discloses a farmhouse sewage treatment device, which comprises an oil-separating sedimentation tank, a facultative oxygen tank, an aerobic biofilm unit and an ecological filter which are sequentially arranged; the farmhouse sewage passes through the oil-separating sedimentation tank, the facultative oxygen After the pool, aerobic biofilm unit and ecological filter, the effluent of the ecological filter is discharged. The utility model aims at high-concentration organic wastewater rich in plant fiber, starch, sugar, protein, vitamins, animal oil, etc., such as farmhouse catering wastewater, and combines "oil-separated precipitation", "facultative biofilm treatment", and "good Oxygen biofilm treatment" and "ecological filtration" processes are isolated and connected in sequence to purify agricultural product processing wastewater containing a large amount of oil and high concentrations of ammonia nitrogen and total phosphorus, as well as farmhouse catering wastewater.

Description

A farmhouse sewage treatment device

technical field

The utility model relates to a sewage treatment device, in particular to a high-efficiency treatment of farmhouse catering waste water containing high oil, nitrogen and phosphorus, in particular to a device and method for efficiently removing nitrogen and phosphorus from farmhouse sewage.

Background technique

The current treatment methods of catering wastewater mainly include: physical chemical method (coagulation method, adsorption method, coarse graining method and air flotation method, etc.), electrochemical method (electrocoagulation, micro-electrolysis, pulse electrocoagulation method, etc.), microbial treatment method (biological contact oxidation method and sequencing batch activated sludge method), natural biological treatment method.

Among the above-mentioned treatment methods, the biological method is not suitable for the vast number of small and medium catering owners due to its relatively large footprint and long residence time. Although the physicochemical method has a simple process, a short process and a small footprint, its various methods still have certain limitations, and are generally used as pretreatment of catering wastewater. Similarly, the electrochemical method has the problems of high treatment cost, large loss of electrode materials, and the generated sludge needs further treatment. However, for high-concentration organic wastewater rich in plant fiber, starch, sugar, protein, vitamins, animal oil, etc., such as farmhouse catering wastewater, the above methods alone often cannot completely solve the problems of high oil content and high nitrogen and phosphorus content in the water body. , the effluent water quality is difficult to meet the standard.

Utility model content

For the high-concentration organic wastewater rich in plant fiber, starch, sugar, protein, vitamins, animal oil, etc., the existing methods cannot completely solve the problems of high oil content, high nitrogen and phosphorus content in the water body, and difficult effluent quality. To meet the standard problem, the utility model provides a farmhouse sewage treatment device.

A farmhouse sewage treatment device is characterized in that it comprises an oil-separating sedimentation tank, a facultative tank, an aerobic biofilm unit and an ecological filter arranged in sequence; the oil-separating sedimentation tank includes:

A first pool body, one end of the first pool body has a water inlet and the other end has a water outlet;

The first partition and the second partition are arranged vertically in the first pool body along the direction of water flow. A water hole is opened, and the height of the water hole is lower than that of the water channel.

The utility model isolates and connects the processes of "oil-separating precipitation", "facultative biofilm treatment", "aerobic biofilm treatment" and "ecological filtration" in sequence, and is suitable for agricultural products containing a large amount of oil and high concentrations of ammonia nitrogen and total phosphorus. Processing wastewater and farmhouse catering wastewater are purified and treated.

The farmhouse catering wastewater collected through the pipe network flows into the oil separation sedimentation tank by itself, and the suspended solids and grease in the sewage are initially separated by natural flotation, so as to prevent it from clogging the subsequent treatment unit and reduce the load of subsequent treatment. The treated sewage enters the facultative tank, in which a combined film-hanging filler is set, and microorganisms are inoculated, the effluent enters the aerobic biofilm unit, and the aerobic biofilm unit is set with a combined film-hanging filler, which provides strong support for the growth of the biofilm. conditions and increase its contact area with sewage, the bottom of the oxidation tank filler is directly blown and aerated, the biofilm is directly strongly disturbed by the updraft, the renewal is faster, and the activity is maintained at a high level. At the same time, under the condition of stable water load , The biofilm can maintain a certain thickness and is not prone to clogging. Then the sewage enters the ecological filter, and under the synergistic effect of different fillers and aquatic plants, nitrogen and phosphorus are removed efficiently, and finally the process of carbon reduction, nitrogen removal and phosphorus removal of agricultural product processing wastewater or farmhouse catering wastewater is completed.

The oil-separating sedimentation tank adopts natural flotation for grease separation. Preferably, the oil-separating sedimentation tank includes:

A first pool body, one end of the first pool body has a water inlet and the other end has a water outlet;

The first partition and the second partition are arranged vertically in the first pool body along the direction of water flow. A water hole is opened, and the height of the water hole is lower than that of the water channel.

The first partition and the second partition divide the first pool into three areas, the top edge of the first partition is lower than the height of the first pool, and the other three sides are sealed and fixed to the inner wall of the first pool. The second partition is at the same height as the first pool body, and the other three sides are sealed and fixed to the inner wall of the first pool body. The first partition is set close to the water inlet, and the area between the water inlet and the water inlet is the water inlet area, the second partition is set near the water outlet, and the area between the water outlet and the water outlet is the water outlet area, and the main oil separation area is between the two partitions , the water inlet area communicates with the main oil separation area through the water passage, and the main oil isolation area communicates with the water outlet area through the water passage hole on the second separator. The water inlet area conducts preliminary oil-separation treatment on the wastewater entering the first pool, and the oil-separation treated wastewater is buffered in the water outlet area so as to enter the next process.

Further preferably, in order to prevent odor from overflowing, the first pool body is provided with a cover. When the cover is provided, the four sides of the first partition are sealed and fixed to the inner wall of the pool.

Furthermore, the oil-separating sedimentation tank is made of glass fiber reinforced plastic, cuboid, with a cover on the top, fixed with screws.

Furthermore, the water inlet of the oil-separating sedimentation tank is arranged on the upper part of one side of the oil-separating sedimentation tank, which is a circular hole with a diameter of 2-3cm, and the water outlet is arranged at the bottom of the other side of the oil-separating sedimentation tank, which is A circular hole with a diameter of 2-3cm.

Furthermore, the thickness of the separators is the same, both 13-18mm, wherein the first separator connects the bottom of the grease trap, but does not reach the top of the grease trap; the second separator connects the bottom and top of the grease trap, the second The water hole on the two partitions is a circular hole of 2-3cm.

Preferably, the aerobic pool comprises:

A closed second pool body, with a water inlet at one end and a water outlet at the other end of the pool body, the water inlet is connected to the water outlet of the oil separation sedimentation tank through a diversion pipe;

The third partition and the fourth partition are sequentially arranged in the second pool body along the direction of water flow, and a water passage is formed between the bottom edge of the third partition and the bottom plate of the second pool body, and the fourth partition A water passage is formed between the top edge and the roof of the fourth pool body;

And the combined film-hanging filler filled between the third partition and the fourth partition.

Both the third partition and the fourth partition are arranged vertically, and further preferably, the height of the water passage is 6-8 cm.

Between the third dividing plate and the water inlet of the pool body is the water inlet area in the pool body, between the fourth dividing plate and the water outlet of the pool body is the water outlet area of the pool body, and the water inlet area and the water outlet area are respectively It acts as a buffer for the wastewater entering the pool and the treated wastewater in the pool.

The arrangement of the third partition and the fourth partition can also divert the wastewater in the aerobic tank, prolong the residence time of the wastewater in the aerobic tank, and strengthen the treatment effect in the aerobic tank.

Further, the water inlet of the aerobic tank is arranged on the upper part connected to the outlet side of the oil separation sedimentation tank, which is a circular hole with a diameter of 2-3cm, and the water outlet is arranged on the lower part of the side connected to the aerobic biofilm unit, which is a A round hole with a diameter of 2-3cm; the water pipe connecting the outlet of the oil separation sedimentation tank and the water inlet of the aerobic tank is a 2-3cm diversion pipe.

The thickness of the third partition and the fourth partition are the same, both 13-18mm, wherein the third partition connects the top of the aerobic tank, but does not reach the bottom of the aerobic tank, and the size of the gap is 6-8cm; the fourth partition The plate separator connects the bottom of the aerobic tank, but does not reach the top of the aerobic tank.

The combined film-hanging filler in the aerobic tank uses a circular plastic ring as the skeleton and is divided into inner and outer parts. The inner part is a semi-soft filler with a relatively small size, and a number of square holes are evenly arranged around it, and the outer part is soft polyester yarn. . The outlet of the facultative pool is connected to the aerobic biofilm unit, and the sewage is first treated by the aerobic biofilm unit, and then enters the ecological filter for treatment. Preferably, the aerobic biofilm unit and the ecological filter are located in the same pool, including :

Along the direction of water flow, the body of the third pool is divided into the water inlet area, the aerobic biofilm unit, the ecological filter and the fifth partition of the water outlet area, and water holes are opened on all the fifth partitions;

A combined film-hanging filler filled in the aerobic biofilm unit;

An aeration tube arranged in the combined film-filled filler;

And the wetland filler filled in the ecological filter, the wetland filler is planted with aquatic plants.

Further preferably, there is a buffer zone between the aerobic biofilm unit and the ecological filter.

That is to say, four partitions parallel to each other are set in the third pool body. The thickness of all partitions is the same, 13-18cm, preferably 18cm. Water holes are set on all partitions to separate the water inlet area from the aerobic organisms. A hole with a diameter of 3-6mm is set on the separator of the membrane unit, and the distance between adjacent holes is 5-6cm. It is preferable to set up a row vertically, further, to separate the water inlet area from the aerobic biofilm Holes with a diameter of 3mm are set on the clapboard of the unit, and the distance between adjacent holes is 5cm; 4-8 rows of holes with a diameter of 3-6mm are set vertically on other clapboards. The distance between them is 5-7cm, and the distance between the same row of holes is 5-6cm; further, 4 rows of holes with a diameter of 3mm are set vertically on other partitions, and the distance between each row of holes is 5cm. The spacing of the rows of holes is 5cm.

The combined film-hanging filler in the aerobic biofilm unit uses a circular plastic ring as the skeleton and is divided into two parts, the inner and outer parts. The inner part is a semi-soft filler with a relatively small size, and a number of square holes are evenly arranged around it, and the outer part is soft. Polyester yarn, and inoculated with microorganisms such as nitrifying bacteria.

The diameter of the aeration pipe is 1-2cm, and the aeration pipe can be connected to the bottom of the aerobic biofilm unit. Core aeration, the aeration pipe is externally connected to the blower.

Fillers such as volcanic rocks and oyster shells with a particle size of 10-15mm are set in the ecological filter, and aquatic plants are planted above the fillers; the diameter of the water outlet on the water outlet area is 2-3cm.

The method for using the farmhouse sewage treatment device to treat farmhouse sewage includes the following steps: the farmhouse sewage passes through the oil separation sedimentation tank, facultative tank, aerobic biofilm unit and ecological filter in sequence, and then is discharged from the effluent of the ecological filter.

Preferably, the hydraulic retention time in the oil separation sedimentation tank is 0.4-0.6d, the hydraulic retention time in the facultative tank is 0.7-1.0d, the hydraulic retention time in the aerobic biofilm unit is 0.4-0.6d, and the hydraulic retention time in the ecological filter It is 0.2-0.3d.

The oil-separating sedimentation tank of the utility model adopts the natural floating method to separate the slick oil and part of the finely dispersed oil in the sewage, and the aerobic tank adopts a combined film-hanging filler to inoculate microorganisms; the aerobic biofilm unit adopts an aerated ecological filter tank for contact oxidation According to the method, a biofilm filler is set in the pool, the bottom of the pool is aerated to oxygenate the sewage, and nitrifying bacteria are inoculated at the same time; different fillers are set in the ecological filter tank, and aquatic plants are planted above the filler.

The oil separation sedimentation tank removes most of the grease and large solid particles, reducing the organic pollution load in post-treatment. The facultative oxygen pool will further degrade organic matter and improve the biodegradability of sewage. Aerobic biofilm treatment provides an aerobic environment, which is conducive to the nitrification of ammonia nitrogen, and aeration is conducive to the further removal of organic matter. Ecological filters use plants, fillers with good phosphorus adsorption, and anaerobic and facultative environments to further remove nitrogen and phosphorus to improve water quality.

The utility model isolates and connects the processes of "oil separation precipitation", "facultative biofilm treatment", "aerobic biofilm treatment" and "ecological filtration" in sequence, and each treatment link cooperates with each other to reduce carbon, phosphorus and nitrogen The efficiency is high, the purification effect is good for sewage containing high oil, nitrogen and phosphorus, the operation and investment costs are low, and the maintenance and management are simple. After being treated by the device, the removal rates of COD _Cr , TN, NH ₃ -N and TP in the sewage can reach 80-90%, 60-90%, 75-95% and 60-95%.

Description of drawings

Fig. 1 is a schematic view of the device structure of the present invention (arrows in the figure show the direction of water flow).

The reference signs shown in the figure are as follows:

1- Oil separation sedimentation tank 2- Facultative oxygen tank 3- Aerobic biofilm unit

4- Ecological filter 5- Water inlet 6- The first clapboard

7-Second partition 8-Drain tube 9-Third partition

10-the fourth partition 11-combined film-hanging filler 12-aeration tube

13-wet land filler 14-water outlet 15-the fifth dividing plate.

detailed description

As shown in Figure 1, a farmhouse sewage treatment system includes an oil separation sedimentation tank 1, an aerobic tank 2, an aerobic biofilm unit 3 and an ecological filter 4 arranged in sequence, and the water inlet 5 of the system is set at the oil separation tank. On the sedimentation tank, the water outlet 14 of the system is set at the end of the ecological filter 4 .

The oil-separating sedimentation tank 1 comprises a pool body. In the present embodiment, the pool body is made of glass fiber reinforced plastics, a cuboid with a cover on the top, and is fixed with screws. The first partition plate 6 and the second partition plate 7 are separated into three different sizes in the pool body. One zone, along the water flow direction, is the water inlet area, the main oil separation area and the water outlet area successively, and the water inlet 5 is arranged on the top of the side wall of the water inlet area, which is a circular hole with a diameter of 2-3cm. The water outlet is located on the side wall of the water outlet area and is a circular hole with a diameter of 2-3cm. The first partition connects the bottom of the grease trap, but does not reach the top of the grease trap, and the gap between the first partition and the top of the grease trap is a water passage connecting the water inlet area and the main grease trap; the second The partition connects the bottom and top of the grease trap, and the second partition is provided with a water hole connecting the main grease trap area and the water outlet area. The water hole is a 2-3cm round hole, and the height of the water hole is lower than water channel. The thickness of the first partition and the second partition are the same, both being 13-18mm.

The aerobic pool includes a pool body. In the present embodiment, the pool body is made of glass fiber reinforced plastic, cuboid, and has a cover on the top, which is fixed with screws. The aerobic pool consists of two partitions (the third partition 9 and the fourth partition 10) Divide the facultative pool into three parts of different sizes. Along the direction of water flow, they are the water inlet area, the filling area and the water outlet area. The circular hole of -3cm is connected to the water outlet of the grease trap by the guide tube 8, and the water outlet of the pool body is arranged on the side wall of the water outlet area, and is a circular hole with a diameter of 2-3cm. The third partition is connected to the top of the aerobic tank but not to the bottom of the aerobic tank. The size of the gap is 6-8cm, forming a water passage connecting the water inlet area and the filling area, and the second partition is connected to the aerobic tank. The bottom of the tank, but not the top of the aerobic tank, the distance between the top and the top forms a water passage connecting the filling area and the water outlet area. The thickness of the third partition and the fourth partition are the same, both 13-18mm. The combined film-forming filler 11 is filled in the filler area, where the combined film-forming filler adopts a combination of semi-soft filler and soft filler (the combined film-forming filler itself can be realized by prior art).

The aerobic biofilm unit 3 and the ecological filter 4 are integrated in a pool body, which is divided into the water inlet area, the aerobic biofilm unit, the buffer zone by four fifth partitions 15 parallel to each other and vertically arranged in the pool body. Area, ecological filter and water outlet area (arranged sequentially along the direction of water flow), the water inlet of the pool body is arranged on the side wall of the water inlet area, and the water outlet of the aerobic pool is connected through the diversion tube, and the water outlet 14 is located in the water outlet area On the side wall, a row of holes with a diameter of 3-6mm are vertically arranged on the partition separating the water inlet area and the aerobic biofilm unit, and the distance between adjacent holes is 5-6cm. 4-8 rows of holes with a diameter of 3-6mm are provided on the board, the distance between each row of holes is 5-7cm, and the distance between the same row of holes is 5-6cm.

The aerobic biofilm unit is filled with combined film-hanging filler, where the combined film-hanging filler adopts a combination of semi-soft filler and soft filler, and is inoculated with microorganisms such as nitrifying bacteria; an aeration tube is set in the aerobic biofilm unit, The diameter of the aeration pipe is 1-2 cm, and the aeration pipe 12 can be connected to the bottom of the aerobic biofilm unit. The upper and lower positions of the aeration pipe are adjustable, and it is divided into 4 branch pipes, each of which is equipped with a sand core for aeration. Fillers such as volcanic rocks and oyster shells with a particle size of 10-15mm are set in the ecological filter, and aquatic plants are planted above the fillers; the diameter of the outlet on the water outlet area is 2-3cm.

Example 1

In this embodiment, a processing device as shown in FIG. 1 is used.

The farmhouse catering wastewater collected through the pipe network flows into the oil separation sedimentation tank 1 by itself, and the suspended solids and oil in the sewage are initially separated by natural flotation, so as to prevent it from clogging the subsequent treatment unit and reduce the load of subsequent treatment, and then pass through The pretreated sewage enters the aerobic tank 2, and a combined film-hanging filler is set in the aerobic tank, and microorganisms are inoculated. The growth provides strong conditions and increases its contact area with the sewage. The bottom of the oxidation tank filler is directly blown and aerated, and the biofilm is directly strongly disturbed by the updraft, which renews quickly and maintains a high activity. At the same time, the influent load is stable. Under certain circumstances, the biofilm can maintain a certain thickness and is not prone to clogging. Then the sewage enters the ecological filter 4, under the synergistic effect of different fillers and aquatic plants, denitrification and phosphorus removal are carried out efficiently, and finally the process of carbon reduction, denitrification and phosphorus removal of agricultural product processing wastewater or farmhouse catering wastewater is completed.

In this example, the hydraulic retention times of the oil separation sedimentation tank, facultative tank, aerobic biofilm unit and ecological filter are: 0.6d, 1.0d, 0.6d and 0.2d respectively. In this example, the sewage comes from a farmhouse.

In this example, the removal rates of COD _Cr , TN, NH ₃ -N and TP in the effluent were 89.5%, 86.0%, 95.6% and 91.9%, respectively.

Water quality data in table 1 embodiment 1

COD _Cr TN NH ₃ -N TP Influent (mg/L) 1467.0 17.3 9.8 7.05 Effluent (mg/L) 154.0 2.43 0.43 0.57 Removal rate (%) 89.5 86.0 95.6 91.9

Example 2

In this embodiment, a processing device as shown in FIG. 1 is used.

The farmhouse catering wastewater collected through the pipe network flows into the oil separation sedimentation tank 1 by itself, and the suspended solids and oil in the sewage are initially separated by natural flotation, so as to prevent it from clogging the subsequent treatment unit and reduce the load of subsequent treatment, and then pass through The pretreated sewage enters the aerobic tank 2, and a combined film-hanging filler is set in the aerobic tank, and microorganisms are inoculated. The growth provides strong conditions and increases its contact area with the sewage. The bottom of the oxidation tank filler is directly blown and aerated, and the biofilm is directly strongly disturbed by the updraft, which renews quickly and maintains a high activity. At the same time, the influent load is stable. Under certain circumstances, the biofilm can maintain a certain thickness and is not prone to clogging. Then the sewage enters the ecological filter 4, under the synergistic effect of different fillers and aquatic plants, denitrification and phosphorus removal are carried out efficiently, and finally the process of carbon reduction, denitrification and phosphorus removal of agricultural product processing wastewater or farmhouse catering wastewater is completed.

In this example, the hydraulic retention times of the oil separation sedimentation tank, facultative tank, aerobic biofilm unit and ecological filter are: 0.6d, 1.0d, 0.6d and 0.2d respectively. In this embodiment, the sewage comes from a company canteen.

In this example, the removal rates of COD _Cr , TN, NH ₃ -N and TP in the effluent were 85.1%, 75.0%, 88.3% and 66.4%, respectively.

Water quality data in table 2 embodiment 2

COD _Cr TN NH ₃ -N TP Influent (mg/L) 863.0 12.5 4.88 6.42 Effluent (mg/L) 129.0 3.12 0.57 2.16 Removal rate (%) 85.1 75.0 88.3 66.4

The above is only a specific implementation case of the utility model patent, but the technical characteristics of the utility model patent are not limited thereto, any changes or modifications made by those skilled in the relevant fields within the scope of the utility model are covered by Among the patent scope of the present utility model.

Claims (6)

1. a farmhouse sewage treatment device, is characterized in that, comprises the oil-separating sedimentation tank, the aerobic tank, the aerobic biofilm unit and the ecological filter tank that are arranged in sequence; Described oil-separating sedimentation tank comprises: A first pool body, one end of the first pool body has a water inlet and the other end has a water outlet; The first partition and the second partition are arranged vertically in the first pool body along the direction of water flow. A water hole is opened, and the height of the water hole is lower than that of the water channel. 2. The farmhouse sewage treatment device according to claim 1, wherein the first pool body has a cover. 3. The farmhouse sewage treatment device according to claim 1, wherein the aerobic pool comprises: A closed second pool body, with a water inlet at one end and a water outlet at the other end of the pool body, the water inlet is connected to the water outlet of the oil separation sedimentation tank through a diversion pipe; The third partition and the fourth partition are sequentially arranged in the second pool body along the direction of water flow, and a water passage is formed between the bottom edge of the third partition and the bottom plate of the second pool body, and the fourth partition A water passage is formed between the top edge and the roof of the fourth pool body; And the combined film-hanging filler filled between the third partition and the fourth partition. 4. The farmhouse sewage treatment device according to claim 3, wherein the height of the water passage is 6-8 cm. 5. According to the described farmhouse sewage treatment device of claim 1, it is characterized in that, the aerobic biofilm unit and the ecological filter are located in the same pool body, including: The third pool body has a water inlet at one end and a water outlet at the other end, and the water inlet is connected to the water outlet of the aerobic pool through a diversion tube; Along the direction of water flow, the body of the third pool is divided into the water inlet area, the aerobic biofilm unit, the ecological filter and the fifth partition of the water outlet area, and water holes are opened on all the fifth partitions; A combined film-hanging filler filled in the aerobic biofilm unit; An aeration tube arranged in the combined film-filled filler; And the wetland filler filled in the ecological filter, the wetland filler is planted with aquatic plants. 6. The farmhouse sewage treatment device according to claim 5, characterized in that there is a buffer zone between the aerobic biofilm unit and the ecological filter.