CN217077131U - Slaughter wastewater treatment system - Google Patents

Abstract

The utility model discloses a slaughter wastewater treatment system, which comprises an anaerobic tank and an MBR membrane tank; the anaerobic tank is used for hydrolyzing, acidifying and methanizing organic matters in the slaughter wastewater under the action of anaerobic bacteria to remove the organic matters in the wastewater so as to improve the biodegradability of sewage; the MBR membrane tank is used for filtering slaughter wastewater in the tank through a membrane; the anaerobic tank with set up the contact oxidation pond between the MBR membrane cisterna, the contact oxidation pond divide into one-level contact oxidation pond and second grade contact oxidation pond, the contact oxidation pond is used for getting rid of the organic matter in the slaughtering waste water through aerobic microorganisms. Through the utility model discloses can be better degrade the organic pollutant in the sewage to and adopt the processing technology of check sediment oil removal, equalizing basin, air supporting, hydrolytic acidification, UASB anaerobic reaction, catalytic oxidation and MBR membrane, the waste water after the processing can reach the standard of synthesizing the emission.

Description

Slaughter wastewater treatment system

Technical Field

The utility model relates to a sewage treatment technical field, concretely relates to slaughter effluent disposal system.

Background

Slaughter wastewater is derived from the rinse water of plant slaughter and slaughter animals and other ancillary facility wastewater. According to the analysis of relevant data, the waste water of the project has the following characteristics: slaughter wastewater is prepared from fence washing, rinsing, slaughtering and other factory floor washing, scalding, splitting, non-staple food processing, animal residues, blood water and the like. The amount of ammonia nitrogen contained in the excrement remained in the animal body and the blood water generated in the slaughtering process is very high, if the ammonia nitrogen is not treated, the ammonia nitrogen permeates underground or flows into rivers, the water which depends on the existence of human beings can be naturally damaged, and the blue algae breeding phenomenon is caused, so that the fishes and shrimps in the water die in a large area. In the process of slaughtering and meat processing, a large amount of water is consumed, and waste water containing blood stains, grease, hair, meat scraps, visceral impurities, undigested food materials, excrement and other pollutants is removed, and the waste water also contains a large amount of microorganisms harmful to human health. Chinese patent CN113185057A discloses a standard treatment device for pig slaughter wastewater, which adopts conventional anoxic and aerobic treatment and then uses an MBR tank for treatment, but the degradation effect of organic pollutants in slaughter wastewater still cannot reach the expectation.

SUMMERY OF THE UTILITY MODEL

The utility model provides a slaughter effluent disposal system, one of the technical problem who aims at the solution is: the prior treatment process for slaughter wastewater has the technical problem of poor organic matter degradation effect.

In view of the above problems in the prior art, according to the present invention, the present invention adopts the following technical solutions:

a slaughter wastewater treatment system comprising:

the anaerobic tank is used for hydrolyzing, acidifying and methanizing organic matters in the slaughter wastewater under the action of anaerobic bacteria to remove the organic matters in the wastewater so as to improve the biodegradability of the sewage;

the MBR membrane tank is used for filtering the slaughter wastewater in the tank through a membrane;

the anaerobic tank with set up the contact oxidation pond between the MBR membrane cisterna, the contact oxidation pond divide into one-level contact oxidation pond and second grade contact oxidation pond, the contact oxidation pond is used for getting rid of the organic matter in the slaughtering waste water through aerobic microorganisms.

In order to better realize the utility model discloses, further technical scheme is:

further, the anaerobic tank is a UASB anaerobic tank.

Further, still include:

the hydrolysis acidification pool is used for hydrolyzing insoluble organic matters in the slaughter wastewater into soluble organic matters under the action of hydrolytic bacteria and acidification bacteria, and converting macromolecular substances which are difficult to biodegrade into micromolecular substances which are easy to biodegrade; and the wastewater treated by the hydrolysis acidification tank enters the anaerobic tank.

Further, still include:

the air flotation integrated equipment is used for carrying out air flotation pretreatment on the slaughter wastewater, and adding polyaluminium chloride and polyacrylamide into the slaughter wastewater to adsorb, flocculate and settle pollutants in the slaughter wastewater; and the wastewater treated by the air floatation integrated equipment enters the hydrolysis acidification tank.

Further, still include:

the adjusting tank is used for adjusting the water quality and the water quantity of the slaughter wastewater; and the wastewater treated by the regulating tank enters the air floatation integrated equipment.

Further, still include:

the slag and oil separation tank is used for separating solid particles from oil stains in the slaughter wastewater; and the wastewater treated by the slag and oil separation tank enters the regulating tank.

Further, a filler is arranged in the contact oxidation pond.

Further, still include:

and the back washing system is used for back washing the MBR membrane tank.

Further, still include:

and the rotary fan is used for blowing air into the primary contact oxidation tank, the secondary oxidation tank and the MBR membrane tank.

Further, still include:

and the ultraviolet sterilizer is used for performing ultraviolet sterilization on the sewage treated by the MBR membrane tank.

Compared with the prior art, one of the beneficial effects of the utility model is that:

the slaughtering wastewater treatment system of the utility model adopts the two-stage contact oxidation tank for treatment, and under the condition of oxygenation, the organic pollutants in the wastewater are degraded by the action of high-efficiency biological aerobic bacteria, and the degradation effect is better; through the two-stage contact oxidation pond, the cost can be saved to the greatest extent under the condition of achieving a better effect; and the treatment process of grid slag oil separation, an adjusting tank, air floatation, hydrolytic acidification, UASB anaerobic reaction, contact oxidation and MBR membrane is adopted, and the treated wastewater can reach the standard of comprehensive discharge.

Drawings

For a clearer explanation of the embodiments or technical solutions in the prior art of the present application, the drawings used in the description of the embodiments or prior art will be briefly described below, it is obvious that the drawings in the following description are only references to some embodiments in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic view of a slaughter wastewater treatment process according to an embodiment of the present invention.

Fig. 2 is a schematic structural view of a slaughter wastewater treatment system according to an embodiment of the present invention.

Wherein, the reference numbers correspond to the names of the figures:

1-grid channel, 2-oil separation tank, 3-methane tank, 4-regulating tank, 5-air flotation integrated equipment, 6-first flocculation dosing system, 7-second flocculation dosing system, 8-sludge tank, 9-sludge screw pump, 10-hydrolysis acidification tank, 11-anaerobic tank, 12-MBBR aerobic integrated equipment, 13-MBR membrane tank, 14-back flushing self-priming pump, 15-tap water cleaning barrel, 16-membrane washing dosing system, 17-rotary fan, 18-ultraviolet sterilizer and 19-sludge screw stacking machine.

Detailed Description

The present invention will be described in further detail with reference to examples, but the present invention is not limited thereto.

Referring to fig. 1 and 2, a slaughter wastewater treatment system comprises:

the slag and oil separation tank is used for separating solid particles from oil stains in slaughter wastewater and can pack solid waste to consign and dispose the solid waste.

And the adjusting tank 4 is used for adjusting the slaughter wastewater separated by the residue and oil separating tank, including adjusting the water quality and the water quantity to balance the slaughter wastewater.

Because the composition of the wastewater is complex, the water discharge time is not fixed, the regulating tank 4 is specially arranged to regulate the water quality and the water quantity, ensure that a subsequent biochemical system can stably treat the wastewater, and increase the shock resistance of the system. The adjusting tank 4 is a structure for adjusting the flow rate of inlet and outlet water and the water quality. The device mainly has the effects of adjusting the water quantity and the water quality, adjusting the pH value and the water temperature of sewage and can also be used for accident drainage. For some reactions, such as anaerobic reaction, the anaerobic reaction is sensitive to water quality, water quantity and impact load, so that for the adjusting tank 4 with proper size of industrial wastewater, the adjustment of the water quality and the water quantity is the guarantee of stable operation of the anaerobic reaction. The purpose of the regulating reservoir 4 is to homogenize and homogenize the volume.

And the air flotation integrated equipment 5 is used for carrying out air flotation pretreatment on the slaughter wastewater treated by the regulating tank 4. The slaughtering wastewater is aerated to generate enough micro-bubbles in the wastewater, so that solid-liquid-gas three-phase pollutants can form a suspension state, the micro-bubbles are adhered to pollutant particles to be removed under the action of surface tension, buoyancy and the like, and the density of an adhesion body is smaller than that of water and floats to the water surface, so that the pollutants in the water are separated and removed. The coating wastewater treatment can adopt air floatation treatment, namely, suspended matters in the wastewater are adhered by using highly dispersed micro-bubbles as carriers, so that the suspended matters have density lower than that of water and float to the water surface or the flocculation action of a flocculating agent is utilized to realize solid-liquid separation. The removal rate of suspended substances in the wastewater can reach 65 percent by applying the air floatation method.

Polyaluminium chloride and polyacrylamide can be added into the air floatation integrated equipment 5, and colloid in the sewage or sludge is rapidly precipitated through the polyaluminium chloride and hydrolysate, so that the particle precipitate can be conveniently separated. Polyacrylamide is classified into anionic polyacrylamide, cationic polyacrylamide and nonionic polyacrylamide according to the characteristics of dissociable groups, and plays roles in adsorption, flocculation and sedimentation of pollutants in slaughter wastewater. Sludge generated in the treatment process of the air floatation integrated equipment 5 enters a sludge tank.

And the hydrolysis acidification tank 10 is used for hydrolyzing insoluble organic matters into soluble organic matters under the action of hydrolytic bacteria and acidifying bacteria after the slaughter wastewater is treated by the air floatation integrated equipment 5, and converting macromolecular substances which are difficult to biodegrade into micromolecular substances which are easy to biodegrade.

The hydrolysis acidification process controls anaerobic treatment in the first and second stages of anaerobic treatment with short reaction time according to different growth speeds of methanogenic bacteria and hydrolysis acid-producing bacteria, namely, the process of hydrolyzing insoluble organic matters into soluble organic matters under the action of a large amount of hydrolysis bacteria and acidification bacteria and converting macromolecular substances which are difficult to biodegrade into small molecular substances which are easy to biodegrade, thereby improving the biodegradability of wastewater and laying a good foundation for subsequent treatment. The combination of the process of the step and other processes can reduce the treatment cost and improve the treatment efficiency. Sludge generated in the treatment process of the hydrolysis acidification tank 10 can also enter the sludge tank.

The anaerobic tank 11 is used for enabling organic matters to be hydrolyzed, acidified and methanated under the action of anaerobic bacteria, removing the organic matters in the wastewater, improving the biodegradability of the sewage and facilitating subsequent aerobic treatment.

Among them, the anaerobic tank 11 may preferably be a UASB anaerobic tank. In UASB anaerobic tanks, wastewater is introduced into the bottom of the UASB anaerobic tank as uniformly as possible, and the wastewater passes upward through a sludge bed containing granular sludge or flocculent sludge. The anaerobic reaction occurs during contact between the wastewater and the sludge particles. Methane and carbon dioxide are generated in an anaerobic state to cause internal circulation, some gas formed in a sludge layer adheres to sludge particles, rises to the top of the UASB anaerobic tank, and sludge flocs adhered with bubbles are degassed due to rising impact. The gas can be collected as sludge particles will settle to the surface of the sludge bed after the bubbles are released.

And the contact oxidation pond is used for removing organic matters in the slaughtering wastewater through aerobic microorganisms. The method adopts a two-stage contact oxidation mode and comprises a first-stage contact oxidation tank and a second-stage contact oxidation tank.

In the treatment process, soluble organic matters in the wastewater enter the bacteria body through cell walls of the bacteria and are absorbed by the bacteria; the solid and colloidal organic substances are adsorbed outside the bacteria, and the exoenzymes secreted by the bacteria are decomposed into soluble substances and then permeate into the bacterial cells. The bacteria oxidize a part of absorbed organic matters into simple inorganic matters through self life activities, namely, oxidation, reduction, synthesis and other series processes under the action of endoenzyme, for example, carbon in the organic matters is oxidized into carbon dioxide, hydrogen and oxidation synthesis water, nitrogen is converted into ammonia, nitrite or nitrate, phosphorus is oxidized into phosphate, sulfur is oxidized into sulfate and the like, and simultaneously, energy required by the growth and the activities of the bacteria is released. At the same time, another part of the organic matter is synthesized into new protoplasm as a nutrient substance necessary for the growth and reproduction of the bacteria themselves.

The biological contact oxidation method is a biomembrane process between an activated sludge process and a biological filter, and is characterized in that a filler is arranged in the biological contact oxidation tank, aeration is carried out on the bottom of the biological contact oxidation tank to oxygenate sewage, and the sewage in the tank body is in a flowing state, so that the sewage is ensured to be fully contacted with the filler in the sewage, and the defect of uneven contact between the sewage and the filler in the biological contact oxidation tank is avoided. The basic principle of purifying waste water is the same as that of a common biomembrane method, and the biomembrane is used for adsorbing organic matters in the waste water, so that the organic matters are oxidized and decomposed by microorganisms under the aerobic condition, and the waste water is purified.

In the process, oxygen required by microorganisms is supplied by blast aeration, after a biological film grows to a certain thickness, the microorganisms on the wall of the filler can carry out anaerobic metabolism due to oxygen deficiency, the generated gas and the scouring action formed by aeration can cause the falling of the biological film and promote the growth of a new biological film, and at the moment, the fallen biological film flows out of the pool along with effluent.

The biological membrane in the biological contact oxidation pond consists of zoogloea, filamentous bacteria, fungi, protozoa and metazoan. In the activated sludge process, filamentous bacteria are often the factor affecting normal biological purification; in the biological contact oxidation pond, filamentous fungi are in a three-dimensional structure in gaps of the filler, so that the contact surface between a biological phase and wastewater is greatly increased, and meanwhile, the filamentous fungi have strong oxidizing capability on most organic matters and have large adaptability to water quality load change, so that the filamentous fungi are a powerful factor for improving the purifying capability.

The bio-contact oxidation method is one of the biofilm methods, and has the advantages of both activated sludge and biofilm. Compared with the traditional activated sludge method and biological filter method, the method has the advantages of large specific surface area, high sludge concentration, long sludge age, high oxygen utilization rate, power consumption saving, low sludge yield, low operation cost, easy operation of equipment, easy maintenance and the like, and is widely researched and applied at home and abroad.

The biological contact oxidation method has the advantages of high purification efficiency, short treatment time, strong adaptability to the change of the organic load of inlet water, no need of sludge backflow, no sludge bulking problem and convenient operation and management.

And the MBR membrane tank 13 is used for filtering the slaughtering wastewater in the tank through a membrane.

And the back flushing system is used for back flushing the MBR membrane tank 13. The backwashing system can comprise a backwashing self-sucking pump 14, the backwashing self-sucking pump 14 is connected with a tap water cleaning barrel 15, a membrane washing and medicine adding system 16 is connected to a pipeline connecting the backwashing self-sucking pump 14 and the tap water cleaning barrel 15, and acid and/or alkali can be added into backwashing tap water through the membrane washing and medicine adding system 16.

And the rotary fan 17 is used for blowing air to the primary contact oxidation tank, the secondary contact oxidation tank and the MBR membrane tank 13 so as to aerate the primary contact oxidation tank, the secondary contact oxidation tank and the MBR membrane tank 13.

And the ultraviolet sterilizer 18 is used for performing ultraviolet sterilization on the sewage treated by the MBR membrane tank 13.

And the clean water tank is used for storing the water after being disinfected by the ultraviolet rays. The clear water in the clear water tank can be discharged up to the standard, and a part of the clear water can also flow back to the hydrolysis acidification tank 10, and a part of the clear water can be used for a back washing system.

And the water outlet metering device is used for metering the standard water discharged from the clean water tank.

And the sludge tank 8 is used for storing the sludge generated by the air floatation integrated equipment, the hydrolysis acidification tank 10, the anaerobic tank 11, the primary contact oxidation tank, the secondary contact oxidation tank and the MBR membrane tank 13 in the above embodiment.

And a sludge screw stacking machine 19 for dehydrating the sludge in the sludge tank 8, wherein the dehydrated sludge can be consigned to be transported and disposed.

As shown in fig. 2, fig. 2 shows the connection structure of slaughtering wastewater treatment system of an embodiment of the utility model, at first slaughtering wastewater and getting into the dregs separating oil interceptor, this dregs separating oil interceptor includes grid canal 1 and oil separating tank 2, gets rid of the solid pollutant in slaughtering wastewater through grid canal 1, and waste water gets into oil separating tank 2 after passing through grid canal 1, gets rid of the floatable oil class material in slaughtering wastewater by oil separating tank 2. The oil separation tank 2 is communicated with the methane tank 3, slaughtering wastewater enters the methane tank 3, and the wastewater is pretreated under the conditions of certain temperature, humidity and pH value through the action of microbial fermentation. The methane tank 3 is connected with the adjusting tank 4, the adjusting tank 4 is communicated with the air flotation integrated equipment 5, the air flotation integrated equipment 5 is connected with a first flocculation dosing system 6 and a second flocculation dosing system 7, and a PAC flocculating agent and a PAM flocculating agent are added into the air flotation integrated equipment 5 through the first flocculation dosing system 6 and the second flocculation dosing system 7 respectively. 5 accessible pipelines of air supporting integrated equipment are connected with sludge impoundment 8, can set up mud screw pump 9 on this pipeline, carry the mud that 5 produced of air supporting integrated equipment to sludge impoundment 8 in through this mud screw pump 9.

The air flotation integrated device 5 is connected with a hydrolysis acidification tank 10, the hydrolysis acidification tank 10 is connected with an anaerobic tank 11, and the anaerobic tank 11 is connected with an MBBR aerobic integrated device 12, that is, the MBBR aerobic integrated device 12 is adopted in the present embodiment to replace the primary contact oxidation tank and the secondary contact oxidation tank of the above embodiments. The MBBR aerobic integrated equipment 12 is connected with an MBR membrane tank 13.

After the treatment by the system, better water quality can be achieved, and the water quality estimation and the material balance can be shown in the following table.

The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

Reference throughout this specification to "one embodiment," "another embodiment," "an embodiment," etc., means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment described generally in this application. The appearances of the same phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the scope of the invention to effect such feature, structure, or characteristic in connection with other embodiments.

Although the invention has been described herein with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this invention. More specifically, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure and claims of this application. In addition to variations and modifications in the component parts and/or arrangements, other uses will also be apparent to those skilled in the art.

Claims (10)

1. A slaughter wastewater treatment system comprising:

the anaerobic tank (11) is used for hydrolyzing, acidifying and methanizing organic matters in the slaughter wastewater under the action of anaerobic bacteria to remove the organic matters in the wastewater so as to improve the biodegradability of the sewage;

an MBR membrane tank (13) for filtering the slaughter wastewater in the tank through a membrane;

characterized in that a space is arranged between the anaerobic tank (11) and the MBR membrane tank (13)

The contact oxidation pond, the contact oxidation pond divide into one-level contact oxidation pond and second grade contact oxidation pond, the contact oxidation pond is used for getting rid of the organic matter in the slaughtering waste water through aerobic microorganisms.

2. The slaughter wastewater treatment system according to claim 1, characterised in that the anaerobic tank (11) is a UASB anaerobic tank.

3. The slaughter wastewater treatment system according to claim 1, further comprising:

the hydrolysis acidification pool (10) is used for hydrolyzing insoluble organic matters in the slaughter wastewater into soluble organic matters under the action of hydrolytic bacteria and acidification bacteria, and converting macromolecular substances which are difficult to biodegrade into micromolecular substances which are easy to biodegrade; and the wastewater treated by the hydrolysis acidification tank (10) enters the anaerobic tank (11).

4. The slaughter wastewater treatment system according to claim 3, further comprising:

the air flotation integrated equipment (5) is used for carrying out air flotation pretreatment on the slaughter wastewater; and the wastewater treated by the air floatation integrated equipment (5) enters the hydrolysis acidification tank (10).

5. The slaughter wastewater treatment system according to claim 4, further comprising:

the adjusting tank (4) is used for adjusting the water quality and the water quantity of the slaughter wastewater; and the wastewater treated by the regulating tank (4) enters the air floatation integrated equipment (5).

6. The slaughter wastewater treatment system according to claim 5, further comprising:

the slag and oil separation tank is used for separating solid particles from oil stains in the slaughter wastewater; and the wastewater treated by the slag and oil separation tank enters the regulating tank (4).

7. The slaughter wastewater treatment system according to claim 1, wherein a packing is provided in said contact oxidation basin.

8. The slaughter wastewater treatment system according to claim 1, further comprising:

and the back washing system is used for back washing the MBR membrane tank (13).

9. The slaughter wastewater treatment system according to claim 1, further comprising:

and the rotary fan (17) is used for blowing air into the primary contact oxidation pond, the secondary oxidation pond and the MBR membrane pond (13).

10. The slaughter wastewater treatment system according to claim 1, further comprising:

and the ultraviolet sterilizer (18) is used for performing ultraviolet sterilization on the sewage treated by the MBR membrane tank (13).

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