CN210825836U

CN210825836U - Pig farm effluent treatment plant

Info

Publication number: CN210825836U
Application number: CN201921208055.6U
Authority: CN
Inventors: 孙辛卉
Original assignee: Individual
Current assignee: Henan Mengwujie Environmental Protection Technology Co ltd
Priority date: 2019-07-30
Filing date: 2019-07-30
Publication date: 2020-06-23
Anticipated expiration: 2029-07-30

Abstract

The utility model discloses a pig farm effluent treatment plant, including wastewater treatment system, wastewater treatment system includes UASB reactor (1), just sinks pond, buffer pool, equalizing basin, hydrolysis tank, aeration tank, two heavy ponds, flocculation basin, sedimentation tank, disinfection pond, mud condensation pond and equipment room, still includes odor treatment system, odor treatment system includes odor delivery pipeline, branch pipe exhaust fan, total exhaust fan, blast gate and odor alkalization absorption tank. The utility model discloses a preliminary treatment, high-efficient contact oxidation, chemical flocculation and sterile processing technology, the COD in the waste water has been got rid of, harmful substance such as BOD and ammonia nitrogen, disinfection treatment can carry out the water discharge to reaching standard after innoxious with the escherichia coli treatment that exceeds standard, be favorable to improving regional surface water environmental quality, the foul smell is handled into clean gas, realize discharge to reach standard, be favorable to guaranteeing resident's physical and mental health around, to improving resident's work around, the living environment all can produce obvious benefit.

Description

Pig farm effluent treatment plant

Technical Field

The utility model relates to a waste water treatment field, especially a pig farm effluent treatment plant.

Background

The pig farm produces solid pollutants such as excrement, waste water such as urine and flushing water, and also produces atmospheric pollutants such as odor in the running process. Pollutants in pig farms can pollute the environment in the steps of collection, storage, transportation, treatment, utilization and the like, and if the pollutants cannot be properly treated, the pollutants can cause great threat and harm to water, atmosphere, soil and human health, and great negative effects are brought to the sustainable development of the pig industry. Most pig raising plants can build biogas digesters to realize energy utilization, and biogas slurry wastewater is mainly waste generated by anaerobic fermentation of livestock and poultry manure added in biogas engineering, contains a certain amount of organic matters, inorganic matters and other harmful substances, and can cause pollution to the surrounding environment, especially water pollution and air pollution if directly discharged. In the prior art, the pretreatment, high-efficiency contact oxidation, chemical flocculation and disinfection treatment processes are adopted, harmful substances such as COD, BOD, ammonia nitrogen and the like in the wastewater are removed, standard-reaching effluent is discharged after standard-exceeding escherichia coli is treated to be harmless through disinfection treatment, but the influence of odor generated in the treatment process of the biogas wastewater on the surrounding environment is ignored.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to overcome above technical problem, provide a pig farm effluent treatment plant.

In order to solve the technical problem, the technical proposal provided by the utility model is a wastewater treatment device for pig farms, which comprises a wastewater treatment system,

waste water treatment system includes UASB reactor, just sinks pond, buffer pool, equalizing basin, hydrolysis tank, aeration tank, two heavy ponds, flocculation basin, sedimentation tank, disinfection pond, mud condensation pond and equipment room, still includes odor treatment system, odor treatment system includes odor delivery pipeline, branch pipe exhaust fan, total exhaust fan, blast gate and odor alkalization absorption tank.

Preferably, the foul smell conveyer pipe includes that the foul smell carries branch pipe and foul smell to carry the house steward, and a plurality of foul smell carries branch connection in foul smell delivery header, UASB reactor, just heavy pond, buffer pool, equalizing basin, hydrolysis tank, aeration tank, two heavy ponds, flocculation basin, sedimentation tank, disinfection pond, mud condensation pond and equipment room, mud condensation pond and waste water sump pit's top all is equipped with the foul smell hole of exhausting, the foul smell hole of exhausting all carries branch pipe and foul smell delivery header to connect in foul smell alkalization absorption tank through the foul smell, branch pipe exhaust fan and blast valve set up on the foul smell carries the branch pipe, total exhaust fan sets up on the foul smell delivery header, and is close to the foul smell alkalization absorption tank.

Preferably, the air valve is a one-way exhaust valve for preventing reverse flow of odor.

Preferably, the branch pipe exhaust fan and the main exhaust fan are explosion-proof centrifugal exhaust fans.

Preferably, the lower end of the UASB reactor is communicated with a wastewater collecting well of a pig farm through a pipeline, the UASB reactor is also communicated with a primary sedimentation tank and a sludge condensation tank through pipelines respectively, the primary sedimentation tank and a buffer tank are of an integral structure and are communicated, the primary sedimentation tank is communicated with the sludge condensation tank through a pipeline, the buffer tank is communicated with an adjusting tank through a pipeline, the adjusting tank is communicated with a hydrolysis tank through a pipeline, the hydrolysis tank is communicated with an aeration tank and a sludge condensation tank through pipelines respectively, the aeration tank is communicated with a secondary sedimentation tank through a pipeline, the secondary sedimentation tank is communicated with a flocculation tank and a sludge condensation tank through pipelines respectively, the flocculation tank is communicated with a sedimentation tank through a pipeline, and the sedimentation tank is communicated with a disinfection tank and a sludge condensation tank through pipelines respectively; the disinfection tank and the sludge condensation tank are also connected with discharge pipes, the number of the discharge pipes connected with the disinfection tank is one, and the number of the discharge pipes connected with the sludge condensation tank is two; and a Roots blower is arranged in the equipment room and is respectively communicated with the hydrolysis tank and the aeration tank through pipelines.

Compared with the prior art, the utility model have following advantage: except adopting the treatment process of preliminary treatment, high-efficient contact oxidation, chemical flocculation and disinfection, harmful substances such as COD, BOD and ammonia nitrogen in the waste water are removed, the disinfection can be carried out and water discharge up to standard after the escherichia coli that exceeds standard is treated to innoxious, be favorable to improving regional surface water environmental quality, moreover, the foul smell enters the gaseous pollutants in the foul smell alkalization absorption tank and takes place chemical reaction with alkali lye, the foul smell is handled into clean gas, realize the emission up to standard, be favorable to guaranteeing the physical and mental health of residents on every side, can all produce obvious benefit to improving resident's work on every side, living environment.

Drawings

FIG. 1 is a schematic view of the wastewater treatment device in a pig farm of the present invention.

As shown in the figure: 1. a UASB reactor; 2. a primary sedimentation tank; 3. a buffer pool; 4. a regulating tank; 5. a hydrolysis tank; 6. an aeration tank; 7. a secondary sedimentation tank; 8. a flocculation tank; 9. a sedimentation tank; 10. a disinfection tank; 11. a sludge condensation tank 11; 12. an equipment room; 13. a Roots blower; 14 waste water collecting well; 15. an odor alkalization absorption tank; 16. branch pipe exhaust fans; 17. an air valve; 18. a general exhaust fan.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in the figure, a pig farm effluent treatment plant, including effluent treatment system, effluent treatment system includes UASB reactor 1, preliminary sedimentation tank 2, buffer pool 3, equalizing basin 4, hydrolysis tank 5, aeration tank 6, two heavy ponds 7, flocculation basin 8, sedimentation tank 9, disinfection pond 10, mud recondenstion pond 11 and equipment room 12, still includes odor treatment system, odor treatment system includes odor delivery duct, branch pipe exhaust fan 16, total exhaust fan 18, blast gate 17 and odor alkalization absorption tank 15.

The odor delivery pipe includes that the foul smell carries branch pipe and foul smell delivery header pipe, and a plurality of foul smell carries the branch connection in the foul smell and carries the house steward, UASB reactor 1, just heavy pond 2, buffer pool 3, equalizing basin 4, hydrolysis tank 5, aeration tank 6, two heavy ponds 7, flocculation basin 8, sedimentation tank 9, disinfection pond 10, mud condensation pond 11 and equipment room 12, mud condensation pond 11, and waste water sump pit 14's top all is equipped with the foul smell hole, the foul smell hole all carries branch pipe and foul smell delivery header pipe to connect in foul smell alkalization absorption tank 15 through the foul smell, branch pipe exhaust fan 16 and blast gate 17 set up on the foul smell delivery branch pipe, total exhaust fan 18 sets up on the foul smell delivery header pipe, and is close to foul smell alkalization absorption tank 15.

The air valve 17 is a one-way exhaust valve for preventing odor from flowing backwards.

The branch exhaust fans 16 and the main exhaust fan 18 are explosion-proof centrifugal exhaust fans.

The lower end of the UASB reactor 1 is communicated with a piggery wastewater collecting well 14 through a pipeline, the UASB reactor 1 is also communicated with a primary sedimentation tank 2 and a sludge condensation tank 11 through pipelines respectively, the primary sedimentation tank 2 and a buffer tank 3 are of an integral structure and are communicated, the primary sedimentation tank 2 is communicated with the sludge condensation tank 11 through a pipeline, the buffer tank 3 is communicated with an adjusting tank 4 through a pipeline, the adjusting tank 4 is communicated with a hydrolysis tank 5 through a pipeline, the hydrolysis tank 5 is communicated with an aeration tank 6 and the sludge condensation tank 11 through a pipeline respectively, the aeration tank 6 is communicated with a secondary sedimentation tank 7 through a pipeline, the secondary sedimentation tank 7 is communicated with a flocculation tank 8 and the sludge condensation tank 11 through a pipeline respectively, the flocculation tank 8 is communicated with a sedimentation tank 9 through a pipeline, and the sedimentation tank 9 is communicated with a disinfection tank 10 and the sludge condensation tank 11 through a pipeline respectively; the disinfection tank 10 and the sludge condensation tank 11 are also connected with discharge pipes, the number of the discharge pipes connected with the disinfection tank 10 is one, and the number of the discharge pipes connected with the sludge condensation tank 11 is two; and a Roots blower 13 is arranged in the equipment room 12, and the Roots blower 13 is respectively communicated with the hydrolysis tank 5 and the aeration tank 6 through pipelines.

Example (b): because the water quality of the influent biogas slurry is unstable, and COD is more than 1500mg/L, if the water quality enters an aerobic treatment unit, a large amount of oxygen and medicine are consumed, and the water quality is treated to a certain degree by a strict anaerobic treatment mode by using a UASB three-phase separator; the primary sedimentation tank 2 can remove sinkable objects and floating objects in the wastewater, after the wastewater is primarily sedimentated, about 50 percent of the sinkable objects and floating objects and 20 percent of the BOD can be removed, the primary sedimentation tank 2 is the most economical purification step according to the removal of BOD or solid objects, the wastewater with higher suspended matters is easily pretreated by the primary sedimentation tank 2, the hydraulic load rate is generally 0.6-1.2 m3/(m2 h), the wastewater mainly comes from biogas slurry, a great amount of suspended particulate matters are in the wastewater, if the wastewater directly enters a subsequent biochemical system, the treatment load of a subsequent treatment unit is increased, the treatment effect is influenced, even the wastewater cannot normally run, the pretreated wastewater enters the subsequent treatment system for treatment, the treatment of the wastewater is mainly concentrated on phosphorus removal, the phosphorus removal rate of the biochemical action reaches the limit, but the excessively high phosphorus removal rate does not reach the process requirements by the subsequent treatment, a pretreatment process for removing phosphorus is required to be arranged at the front end of a biochemical system, PAC and PAM are added into a primary sedimentation tank 2 for flocculation and precipitation, and phosphorus is separated out from the system while a phosphorus-containing compound is generated; sewage is at equalizing basin 4 regulation quality of water yield, and equalizing basin 4 is also called accident pool, has following effect: 1. primary settling and separating; 2. the water quality is adjusted to be balanced, which is beneficial to the next working procedure; 3. adjusting the water quantity, if the water inlet is not uniform, the pool can be adjusted; 4. the accident buffering function can be realized, if the following treatment process has small faults, the wastewater can be temporarily stored in the process to play a role of buffering, so that the production process cannot be stopped because the wastewater cannot be discharged; in the hydrolysis tank 5, the decomposition effect of anaerobic bacteria on macromolecular compounds is utilized to decompose macromolecular compounds which are difficult to be decomposed by facultative microorganisms and aerobic microorganisms in sewage into small molecular compounds, organic matters in a non-dissolved state are intercepted and gradually converted into organic matters in a dissolved state, so that the removal effect of subsequent aerobic reaction facilities on COD is improved, the inhibition of certain organic compounds on nitrobacteria in the aerobic reaction facilities is weakened or even eliminated, when the organic matters in water are in a complex structure, H + and-OH ionized by H2O are utilized by hydrolytic acidification bacteria to open C-C in organic matter molecules, H + is added at one end, OH is added at one end, a long chain can be hydrolyzed into a short chain, a branched chain is formed into a straight chain, a cyclic structure forms a straight chain or a branched chain, the biodegradability of the sewage is improved, when SS (suspended solids) in water is high, the hydrolytic acidification bacteria capture the linear chain through extracellular mucosa, and hydrolyze component fragments into intracellular metabolism by using exo, incomplete metabolism can turn SS into soluble organics; in the aeration tank 6, the mixing is promoted by displacement of water by the discharge of gas bubbles and the contact between the water and the bubbles causes oxygen transfer and is released along the pipes, there is a certain amount of free flow in the system, with the most effective, chemically inert medium as the medium, breaking the receptacle for bacteria of the untreated sewage, supplying oxygen to the sewage and the medium by the roots blower further accelerating the breakdown, while feeding microorganisms embedded on the medium, which will cause the microorganisms to replicate, releasing billions of microorganisms per second, so that the microorganisms multiply in large quantities even more, during which the biochemical oxygen demand BOD and ammonia nitrogen in the liquid are substantially reduced; in the flocculation tank 8, PAC or PAM is added according to the flocculate source in the sewage, a hyperboloid stirrer is used for stirring, the middle of the sedimentation tank is funnel-shaped, sediment at the bottom is pumped into a drying bed by a pump, supernatant enters the sedimentation tank, effluent enters a disinfection tank 10 and is disinfected by an ozone generator and then discharged after reaching the standard; the sludge generated in the system is mainly materialized sludge and biochemical excess sludge, the excess sludge in the system is sent to a drying bed for natural percolation so as to greatly reduce the water content of the sludge, sludge-containing wastewater is subjected to the action of a filter layer to retain the sludge, filtrate is leaked from the lower part and enters an original treatment system for retreatment, and a screw-stacking dehydrator is adopted to desliming when the weather condition cannot dry the sludge, so that the normal operation of a sewage treatment system is achieved. 2 sewage lifting pumps are installed in the water collecting well, one is used and the other is standby; the primary sedimentation tank is provided with 1 sludge pump and is arranged in the primary sedimentation tank, the adjusting tank and the hydrolysis tank are used for preventing sludge at the bottom from settling, and perforated aeration pipes are arranged; the secondary sedimentation tank is provided with 2 sludge reflux pumps which are arranged in the secondary sedimentation tank and are used and prepared one by one; the flocculation tank and the sedimentation tank are respectively provided with 1 curved surface stirrer, a dosing device, a PH meter and the like, and are respectively provided with 2 sludge pumps in the tanks; the bottom of the sludge tank is provided with 1 sludge pump. A plurality of valves are arranged on the sludge circulating pipeline, and a pipeline pump is arranged between the UASB reactor and the pipeline communicated with the sludge condensation tank and is used for pumping away the sludge in the UASB reactor.

In addition, the following UASB reactor 1, primary sedimentation tank 2, buffer tank 3, adjusting tank 4, hydrolysis tank 5, aeration tank 6, secondary sedimentation tank 7, flocculation tank 8, sedimentation tank 9, disinfection tank 10, sludge condensation tank 11, equipment room 12, sludge condensation tank 11, and waste water collecting well 14 are provided with incompletely closed covers similar to cone shape at the top, the cover top is provided with odor vent holes and connected with odor delivery branch pipes, the odor delivery branch pipes are provided with branch pipe exhaust fans 16 and one-way exhaust valves for preventing odor from flowing back, namely air valves 17, the incompletely closed covers are used for supplying proper amount of fresh air to each reaction tank from the outside when the branch pipe exhaust fans 16 exhaust air, all the odor delivery branch pipes are converged in an odor delivery main pipe which is connected to the alkalization absorption tank 15 through an odor delivery main pipe, and the odor delivery main pipe is provided with a general exhaust fan 18 near the odor alkalization absorption tank 15, the main exhaust fan 18 is arranged to send the odor in all the reaction tanks to the odor alkalization absorption tank 15 so as to prevent the air volume of the odor conveyed in each odor conveying branch pipe from influencing each other, and after the odor enters the odor alkalization absorption tank, the pollutants in the air react with alkali liquor such as sodium hydroxide to be treated into clean air, so that the odor is discharged up to the standard.

The present invention and the embodiments thereof have been described above, but the description is not limited thereto, and the embodiment shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should understand that they should not be limited to the embodiments described above, and that they can design the similar structure and embodiments without departing from the spirit of the invention.

Claims

1. The utility model provides a pig farm effluent treatment plant, includes effluent treatment system, effluent treatment system includes UASB reactor (1), just sinks pond (2), buffer pool (3), equalizing basin (4), hydrolysis tank (5), aeration tank (6), two heavy ponds (7), flocculation basin (8), sedimentation tank (9), disinfection pond (10), mud condensation pond (11) and equipment room (12), its characterized in that: still include odor treatment system, odor treatment system includes odor delivery pipeline, branch pipe exhaust fan (16), total exhaust fan (18), blast gate (17) and odor alkalization absorption pond (15).

2. The piggery wastewater treatment device according to claim 1, wherein the odor delivery pipe comprises odor delivery branch pipes and an odor delivery main pipe, a plurality of odor delivery branch pipes are connected to the odor delivery main pipe, the UASB reactor (1), the primary sedimentation tank (2), the buffer tank (3), the adjusting tank (4), the hydrolysis tank (5), the aeration tank (6), the secondary sedimentation tank (7), the flocculation tank (8), the sedimentation tank (9), the disinfection tank (10), the sludge condensation tank (11) and the equipment room (12), the sludge condensation tank (11) and the top of the wastewater collection well (14) are all provided with odor exhaust holes, the odor exhaust holes are all connected to the odor absorption tank (15) through the odor delivery branch pipes and the odor delivery main pipe, the branch exhaust fans (16) and the air valves (17) are arranged on the odor delivery branch pipes, the total exhaust fans (18) are arranged on the odor delivery main pipe, and is close to the odor alkalization absorption tank (15).

3. The wastewater treatment device for pig farms according to claim 1, characterized in that: the air valve (17) is a one-way exhaust valve for preventing odor from flowing backwards.

4. The wastewater treatment device for pig farms according to claim 1, characterized in that: the branch exhaust fans (16) and the main exhaust fan (18) are explosion-proof centrifugal exhaust fans.

5. The wastewater treatment device for pig farms according to claim 1, characterized in that: the lower end of the UASB reactor (1) is communicated with a wastewater collecting well (14) of a pig farm through a pipeline, the UASB reactor (1) is communicated with the primary sedimentation tank (2) and the sludge condensation tank (11) through pipelines respectively, the primary sedimentation tank (2) and the buffer tank (3) are of an integrated structure, the primary sedimentation tank (2) is communicated with the sludge condensation tank (11) through a pipeline, the buffer tank (3) is communicated with the regulating tank (4) through a pipeline, the regulating tank (4) is communicated with the hydrolysis tank (5) through a pipeline, the hydrolysis tank (5) is communicated with the aeration tank (6) and the sludge condensation tank (11) through pipelines respectively, the aeration tank (6) is communicated with the secondary sedimentation tank (7) through a pipeline, the secondary sedimentation tank (7) is communicated with the flocculation tank (8) and the sludge condensation tank (11) through pipelines respectively, the flocculation tank (8) is communicated with the sedimentation tank (9) through a pipeline, and the sedimentation tank (9) is communicated with the disinfection tank (10) and the sludge condensation tank (11) through pipelines respectively; the disinfection tank (10) and the sludge condensation tank (11) are also connected with discharge pipes, the number of the discharge pipes connected with the disinfection tank (10) is one, and the number of the discharge pipes connected with the sludge condensation tank (11) is two; a Roots blower (13) is arranged in the equipment room (12), and the Roots blower (13) is respectively communicated with the hydrolysis tank (5) and the aeration tank (6) through pipelines.