CN216890532U - System for treating harmless treatment wastewater of wet-process livestock and poultry production - Google Patents
System for treating harmless treatment wastewater of wet-process livestock and poultry production Download PDFInfo
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- 239000002351 wastewater Substances 0.000 title claims abstract description 70
- 244000144972 livestock Species 0.000 title claims abstract description 25
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- 244000144977 poultry Species 0.000 title claims description 9
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 78
- 238000000926 separation method Methods 0.000 claims abstract description 45
- 238000004062 sedimentation Methods 0.000 claims abstract description 30
- 230000001105 regulatory effect Effects 0.000 claims abstract description 15
- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 11
- 241000700605 Viruses Species 0.000 claims abstract description 6
- 244000052616 bacterial pathogen Species 0.000 claims abstract description 5
- 239000010802 sludge Substances 0.000 claims description 85
- 239000007788 liquid Substances 0.000 claims description 20
- 238000005188 flotation Methods 0.000 claims description 14
- 238000009280 upflow anaerobic sludge blanket technology Methods 0.000 claims description 13
- 238000005273 aeration Methods 0.000 claims description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 8
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 8
- 239000003344 environmental pollutant Substances 0.000 claims description 8
- 231100000719 pollutant Toxicity 0.000 claims description 8
- 239000012071 phase Substances 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 6
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims description 5
- 241000894006 Bacteria Species 0.000 claims description 4
- 238000006065 biodegradation reaction Methods 0.000 claims description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 4
- 239000001569 carbon dioxide Substances 0.000 claims description 4
- 230000018044 dehydration Effects 0.000 claims description 4
- 238000006297 dehydration reaction Methods 0.000 claims description 4
- 230000005484 gravity Effects 0.000 claims description 4
- 244000005700 microbiome Species 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 238000000746 purification Methods 0.000 claims description 4
- 238000010992 reflux Methods 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 239000006228 supernatant Substances 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 3
- 239000007791 liquid phase Substances 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 239000007790 solid phase Substances 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims 2
- 230000032258 transport Effects 0.000 claims 1
- 238000004065 wastewater treatment Methods 0.000 abstract description 5
- 230000007547 defect Effects 0.000 abstract description 3
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- 230000000249 desinfective effect Effects 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 230000004083 survival effect Effects 0.000 abstract description 2
- 238000005202 decontamination Methods 0.000 abstract 1
- 230000003588 decontaminative effect Effects 0.000 abstract 1
- 238000007599 discharging Methods 0.000 abstract 1
- 230000001546 nitrifying effect Effects 0.000 description 9
- 230000008569 process Effects 0.000 description 5
- 208000028659 discharge Diseases 0.000 description 4
- 230000014759 maintenance of location Effects 0.000 description 4
- 238000001556 precipitation Methods 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 239000010865 sewage Substances 0.000 description 4
- 239000000706 filtrate Substances 0.000 description 3
- 238000011081 inoculation Methods 0.000 description 3
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- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
The utility model discloses a system for treating harmless treatment wastewater of wet-process livestock, which comprises a pretreatment system, a biochemical treatment system and a deep treatment system. The method comprises the steps of enabling harmless treatment wastewater of wet-process livestock to enter an oil separation regulating reservoir, regulating water quantity and homogenizing water quality, then lifting the wastewater by an oil separation regulating reservoir lifting pump to enter an air floatation machine for pretreatment, enabling the pretreated wastewater to automatically flow into an intermediate water tank, enabling effluent of an aerobic tank to enter a secondary sedimentation tank for mud-water separation, enabling effluent of the secondary sedimentation tank to automatically flow into a disinfection tank, disinfecting effluent of the secondary sedimentation tank, removing pathogenic bacteria and virus pollution sources in water, and discharging the wastewater up to the standard. The utility model has obvious decontamination effect and easy management and maintenance, overcomes the defects of the existing wet-method livestock-making harmless treatment wastewater treatment technology, not only meets increasingly strict wastewater treatment requirements, but also ensures the water environment safety of human beings depending on survival.
Description
Technical Field
The utility model belongs to the field of industrial wastewater treatment, and relates to a system specially used for treating harmless treatment wastewater of wet-process livestock and poultry production.
Background
The harmless wet chemical preparation technology for livestock mainly carries out harmless treatment on livestock died of diseases through related processes such as raw material crushing, chemical preparation drying, squeezing and the like under the high temperature condition, and other auxiliary materials are not added in the whole process.
The harmless treatment wastewater for the wet-process poultry and livestock comes from chemical drying wastewater, boiler softening wastewater, workshop disinfection, equipment, ground washing water and the like. Typical characteristics of wastewater are: high concentration of COD pollutants and NH3The concentration of N and grease is high, and in addition, the waste water also has the pollution characteristics of stink, germ and virus pollution sources and the like. For the wastewater, a biological treatment process is mostly adopted, but the traditional biological treatment process has COD and NH when the wastewater is treated3The condition that N and the like can not reach the standard stably, and the problem that pathogenic pollution sources can not be effectively treated.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects in the prior art, the utility model provides the system which has obvious treatment effect and is convenient to manage and maintain, is specially used for treating the harmless treatment wastewater of the wet livestock manufacturing, adopts the combined process of air floatation, UASB reactor, A/O and disinfection to treat the wastewater, and ensures that the harmless treatment wastewater treatment facility of the wet livestock manufacturing can operate stably and efficiently for a long time and the effluent quality is stable and reaches the standard.
The purpose of the utility model is realized as follows:
a system for treating innocent treatment wastewater of wet-process livestock and poultry production is characterized in that: the wastewater enters an oil separation adjusting tank 1, is lifted to an air flotation machine 3 through an oil separation adjusting tank lifting pump 2, the air flotation machine 3 is connected with an intermediate water tank 4 through a pipeline, the wastewater is lifted to a UASB reactor 7 through an intermediate water tank lifting pump 5, effluent sequentially enters an anoxic tank 10 and an aerobic tank 11, then is subjected to mud-water separation through a secondary sedimentation tank 13, and the effluent of the secondary sedimentation tank 13 enters a disinfection tank 15.
The oil separation adjusting tank 1 is used for oil-water separation, water quantity adjustment and water quality uniformity, an air blower 18 is additionally arranged, and timing micro aeration is carried out on the oil separation adjusting tank through an aeration stirring system.
The air floatation machine 3 and the intermediate water tank 4 are integrated equipment, and the air floatation machine 3 is used for oil-water separation and solid-liquid separation; the middle water tank 4 is used for collecting water discharged by the air floatation machine 3, and is matched with a middle water tank lifting pump 5 to provide a stable water source for a UASB reactor 7 at the rear end.
The UASB reactor 7 carries out anaerobic biodegradation treatment on the pretreated wastewater, is provided with a three-phase separator 6 for separating a solid phase, a liquid phase and a gas phase, and is matched with a biogas purification system 8 for treating the generated biogas.
In the anoxic tank 10, the mixed liquid containing nitrate nitrogen which flows back from the wastewater and the aerobic tank 11 and the sludge which flows back from the secondary sedimentation tank 13 are subjected to denitrification reaction under the action of the flow pushing device 9, the nitrate nitrogen in the wastewater is converted into gaseous nitrogen and then removed from the wastewater, and meanwhile, organic matters in the wastewater are utilized by denitrifying bacteria and removed from the wastewater.
The aerobic tank 11 provides sufficient oxygen through the blower 18, organic pollutants in water are decomposed into water and carbon dioxide by microorganisms under aerobic conditions, the pollutants are removed, and the water quality is purified. Meanwhile, nitrifying liquid is refluxed to the anoxic tank 10 by using a nitrifying liquid reflux pump 16.
The secondary sedimentation tank 13 is provided with a secondary sedimentation tank sludge pump 17, and the waste water is precipitated from the activated sludge and other solid matters suspended in the muddy water under the action of gravity through the central cylinder 14 and is separated from the water. Most of the sludge after precipitation is returned to the anoxic tank 10 as inoculation sludge, and the excess sludge is discharged to the sludge tank 19.
The disinfection tank 15 is provided with a NaClO dosing device 12 for disinfecting the effluent of the secondary sedimentation tank 13 to remove pathogenic bacteria and virus pollution sources in the water.
The rear end of the sludge pool 19 is provided with a sludge screw pump 20, sludge is transported to a sludge dewatering machine 21, dewatered sludge is transported out for treatment, and the effluent of the sludge dewatering machine 21 enters an oil separation regulating pool 1.
Wherein, the residual sludge generated by the air flotation machine 3 and the secondary sedimentation tank 13 enters a sludge tank 19. The supernatant of the sludge tank 19 flows back to the oil separation regulating tank 1, the sludge in the sludge tank 19 is transported and disposed after being subjected to pressure filtration and dehydration by a sludge dewatering machine 21, and the pressure filtrate returns to the oil separation regulating tank 1.
Has the positive and beneficial effects that: the system has obvious removal effect and easy management and maintenance, is specially used for treating high-concentration, stink and pathogenic-pollution-source-containing harmless wastewater for wet livestock and poultry preparation, overcomes the defects in the existing technology for treating the harmless wastewater for wet livestock and poultry preparation, meets increasingly strict water treatment requirements, and simultaneously ensures the water environment safety for human depending on survival.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention
In the figure: the device comprises an oil separation adjusting tank 1, an oil separation adjusting tank lifting pump 2, an air flotation machine 3, an intermediate water tank 4, an intermediate water tank lifting pump 5, a three-phase separator 6, a UASB reactor 7, a biogas purification system 8, a flow impeller 9, an anoxic tank 10, an aerobic tank 11, a NaClO dosing device 12, a secondary sedimentation tank 13, a central cylinder 14, a disinfection tank 15, a nitrifying liquid reflux pump 16, a sludge discharge pump 17, an air blower 18, a sludge tank 19, a sludge screw pump 20 and a sludge dewatering machine 21.
Detailed Description
The utility model will be further described with reference to the accompanying drawings:
as shown in figure 1, a system for treating harmless treatment wastewater of wet-process livestock, which is characterized in that: the wastewater enters an oil separation adjusting tank 1, is lifted to an air flotation machine 3 through an oil separation adjusting tank lifting pump 2, the air flotation machine 3 is connected with an intermediate water tank 4 through a pipeline, the wastewater is lifted to an UASB reactor 7 through an intermediate water tank lifting pump 5, effluent sequentially enters an anoxic tank 10 and an aerobic tank 11, then is subjected to mud-water separation through a secondary sedimentation tank 13, and the effluent of the secondary sedimentation tank 13 enters a disinfection tank 15.
The wastewater enters an oil separation regulating reservoir 1 for oil-water separation, water quantity regulation and water quality uniformity, and a blower 18 is additionally arranged to carry out timing micro-aeration on the oil separation regulating reservoir through an aeration stirring system.
The wastewater enters an air flotation machine 3 for oil-water separation and solid-liquid separation; the middle water tank 4 and the air flotation machine 3 are integrated equipment, the middle water tank 4 is used for collecting water discharged by the air flotation machine 3, and a middle water tank lifting pump 5 is matched with the middle water tank lifting pump to provide a stable water source for a UASB reactor 7 at the rear end.
The wastewater enters a UASB reactor 7 for anaerobic biodegradation treatment, a three-phase separator 6 is arranged to separate solid phase, liquid phase and gas phase, and a biogas purification system 8 is matched to treat the generated biogas.
In the anoxic tank 10, the wastewater is mixed with the mixed liquid containing nitrate nitrogen returned from the aerobic tank 11 and the sludge returned from the secondary sedimentation tank 13 under the action of the flow impeller 9 to generate denitrification reaction, the nitrate nitrogen in the wastewater is converted into nitrogen and then removed from the wastewater, and meanwhile, organic matters in the wastewater are utilized by denitrifying bacteria and removed from the wastewater.
In the aerobic tank 11, an air blower 18 is used for providing oxygen required by aerobic reaction, under the aerobic condition, pollutants in water are decomposed and digested by microorganisms, organic matters are degraded into water and carbon dioxide, most of pollutants are removed, and the water quality is purified. Meanwhile, nitrifying liquid is refluxed to the anoxic tank 10 by using a nitrifying liquid reflux pump 16.
A secondary sedimentation tank sludge discharge pump 17 is arranged in the secondary sedimentation tank 13, and the waste water passes through the central cylinder 14 and precipitates activated sludge and other solid matters suspended in the sludge under the action of gravity to be separated from water. Most of the sludge after precipitation is returned to the anoxic tank 10 as inoculation sludge, and the excess sludge is discharged to the sludge tank 19.
A NaClO dosing device 12 is arranged in the disinfection tank 15 to disinfect the effluent of the secondary sedimentation tank 13, so that pathogenic bacteria and virus pollution sources in the water are removed.
The rear end of the sludge tank 19 is provided with a sludge screw pump 20, sludge is transported to a sludge dewatering machine 21, dewatered sludge is transported out for treatment, and the effluent of the sludge dewatering machine 21 enters an oil separation regulating tank 1.
Wherein, the residual sludge generated by the air flotation machine 3 and the secondary sedimentation tank 13 enters a sludge tank 19. The supernatant of the sludge tank 19 flows back to the oil separation regulating tank 1, the sludge in the sludge tank 19 is transported and disposed after being subjected to pressure filtration and dehydration by a sludge dewatering machine 21, and the pressure filtrate returns to the oil separation regulating tank 1.
Example 1
The wastewater quantity of a sewage treatment station of an animal innocent treatment center of a certain enterprise in Henan is 24m3D, the water quality of inlet water is COD 5000mg/L, BOD5 2000mg/L、NH3-N 300mg/L、SS 1000mg/L。
The oil separation adjusting tank 1 is provided with one oil separation adjusting tank with the effective volume of 15m3Two oil separation adjusting tank lifting pumps 2 (one for one) and one adjusting tank micro-aeration device are arranged, and air aeration stirring is carried out through the oil separation adjusting tank micro-aeration device, so that muddy water is uniformly mixed, and sludge deposition is effectively prevented.
One air floating machine 3 is arranged, and the processing capacity is 1.5m3And h, effectively removing the oil and the SS in the sewage.
The middle water tank 4 is provided with a device integrated with the air floatation machine 3 and used for collecting water discharged by the air floatation machine 3, and two middle water tank lifting pumps 5 (one for one and one for standby) are arranged to provide a stable water source for a UASB reactor 7 at the rear end.
The UASB reactor 7 is provided with a set with the effective volume of 26.6m3The ascending flow rate was 0.33m/h and the volume load was 3.0kgCODCr/(m3D) the hydraulic retention time is 26.6h, and the wastewater is subjected to anaerobic biodegradation treatment.
The anoxic tank 10 is provided with a tank with an effective volume of 6m3The hydraulic retention time is 6h, and 1 impeller 9 is arranged. The wastewater is mixed with the mixed liquid containing nitrate nitrogen which flows back from the aerobic tank 11 and the sludge which flows back from the secondary sedimentation tank 13 under the action of the impeller 9 to generate denitrification reaction, the nitrate nitrogen in the wastewater is converted into gaseous nitrogen and then is removed from the wastewater, and meanwhile, the organic nitrogen in the wastewater is removed from the wastewaterThe product is utilized by denitrifying bacteria and removed from the wastewater.
The aerobic tank 11 is provided with a tank with an effective volume of 20m3The hydraulic retention time is about 20h, BOD5The sludge load is 0.13kgBOD5And (kgMLSS. d), the sludge concentration is 3500mg/L, two blowers 18 are arranged (one is used and the other is standby), the blowers 18 are aerated and oxygenated, pollutants in the water are decomposed and digested by microorganisms, organic matters are degraded into water and carbon dioxide, most of the pollutants are removed, and the water quality is purified. Meanwhile, nitrifying liquid is returned to the anoxic tank 10 by using nitrifying liquid return pumps 16 (two nitrifying liquid return pumps are used and one nitrifying liquid return pump is standby).
The secondary sedimentation tank 13 is provided with a vertical flow type tank, and the effective volume is as follows: 3.88m3Surface load of 0.69m3/(m2H), the precipitation time was 2.6 h. Two secondary sedimentation tank sludge pumps 17 (one for use and one for standby) are arranged in the sewage treatment device, and the waste water is precipitated from the activated sludge and other solid matters suspended in the muddy water under the action of gravity through the central cylinder 14 and is separated from the water. Most of the sludge after precipitation is returned to the anoxic tank 10 as inoculation sludge, and the excess sludge is discharged to the sludge tank 19.
The disinfection tank 15 is provided with a tank with an effective volume of 1.8m3And the hydraulic retention time is about 1.2h, and a NaClO dosing device 12 is arranged to disinfect the effluent of the secondary sedimentation tank 13 so as to remove pathogenic bacteria and virus pollution sources in the water.
The rear end of the sludge tank 19 is provided with a sludge screw pump 20, sludge is transported to a sludge dewatering machine 21, dewatered sludge is transported out for treatment, and the effluent of the sludge dewatering machine 21 enters an oil separation regulating tank 1.
Wherein, the residual sludge generated by the air flotation machine 3 and the secondary sedimentation tank 13 enters a sludge tank 19. The supernatant liquid of the sludge tank 19 flows back to the oil separation adjusting tank 1, the sludge in the sludge tank 19 is transported and disposed after being subjected to pressure filtration and dehydration by a sludge dehydrator 21, and the pressure filtrate returns to the oil separation adjusting tank 1.
The effluent quality after passing through the sewage treatment system meets the requirements of the secondary discharge standard of Integrated wastewater discharge Standard (GB8978-1996), and specifically comprises the following steps:
COD≤150mg/L、BOD5≤30mg/L、SS≤150mg/L、NH3-N≤25mg/L。
the wastewater treatment system is not only suitable for a wastewater advanced treatment system for harmless treatment of wet livestock and poultry production, but also suitable for wastewater of other industries with similar characteristics.
The above examples are only for illustrating the preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention within the knowledge of those skilled in the art should be covered within the technical scope of the present invention as claimed.
Claims (10)
1. A system for treating innocent treatment wastewater of wet-process livestock and poultry production is characterized in that: waste water enters an oil separation adjusting tank (1), is lifted to an air flotation machine (3) through an oil separation adjusting tank lifting pump (2), the air flotation machine (3) is connected with an intermediate water tank (4) through a pipeline, the waste water is lifted to a UASB reactor (7) through an intermediate water tank lifting pump (5), effluent sequentially enters an anoxic tank (10) and an aerobic tank (11), then mud-water separation is carried out through a secondary sedimentation tank (13), and effluent of the secondary sedimentation tank (13) enters a disinfection tank (15).
2. The system for treating the harmless treatment wastewater of wet-process livestock according to claim 1, characterized in that: the oil separation adjusting tank (1) is used for oil-water separation, water quantity adjustment and water quality uniformity, and is additionally provided with an air blower (18) which carries out timing micro-aeration on the oil separation adjusting tank through an aeration stirring system.
3. The system for treating the harmless treatment wastewater of wet-process livestock according to claim 1, characterized in that: the air floatation machine (3) and the intermediate water tank (4) are integrated equipment, and the air floatation machine (3) is used for oil-water separation and solid-liquid separation; the middle water tank (4) is used for collecting the water discharged by the air floatation machine (3), and is matched with a middle water tank lifting pump (5) to provide a stable water source for a UASB reactor (7) at the rear end.
4. The system for treating the harmless treatment wastewater of wet-process livestock according to claim 1, characterized in that: the UASB reactor (7) carries out anaerobic biodegradation treatment on the pretreated wastewater, is provided with a three-phase separator (6) for separating a solid phase, a liquid phase and a gas phase, and is matched with a biogas purification system (8) for treating the generated biogas.
5. The system for treating the harmless treatment wastewater of wet-process livestock according to claim 1, characterized in that: the anoxic tank (10), the mixed liquid containing nitrate nitrogen and the sludge returned by the secondary sedimentation tank (13) and returned by the wastewater and the aerobic tank (11) perform denitrification reaction under the action of the flow pushing device (9), the nitrate nitrogen in the wastewater is converted into gaseous nitrogen and then removed from the water, and meanwhile, organic matters in the wastewater are removed from the wastewater by denitrifying bacteria.
6. The system for treating the harmless treatment wastewater of wet-process livestock according to claim 1, characterized in that: the aerobic tank (11) utilizes the air blower (18) to provide oxygen required by aerobic reaction, pollutants in water are decomposed and digested by microorganisms under aerobic conditions, organic matters are degraded into water and carbon dioxide, most of the pollutants are removed, water quality is purified, and meanwhile nitrified liquid flows back to the anoxic tank (10) by utilizing the nitrified liquid reflux pump (16).
7. The system for treating the harmless treatment wastewater of wet-process livestock according to claim 1, characterized in that: the secondary sedimentation tank (13) is provided with a secondary sedimentation tank sludge discharge pump (17), wastewater is precipitated from activated sludge and other solid matters suspended in the sludge under the action of gravity through a central cylinder (14) and is separated from water, most of the precipitated sludge is used as inoculated sludge and flows back to the anoxic tank (10), and the rest sludge is discharged to the sludge tank (19).
8. The system for treating the harmless treatment wastewater of wet-process livestock according to claim 1, characterized in that: the disinfection tank (15) is provided with a NaClO dosing device (12) to disinfect the effluent of the secondary sedimentation tank (13) so as to remove pathogenic bacteria and virus pollution sources in the water.
9. The system for treating the harmless treatment wastewater of wet-process livestock according to claim 7, characterized in that: the rear end of the sludge pool (19) is provided with a sludge screw pump (20) which transports the sludge to a sludge dewatering machine (21), the dewatered sludge is transported out for treatment, and the effluent of the sludge dewatering machine (21) enters an oil separation regulating reservoir (1).
10. The system for treating the harmless treatment wastewater of wet-process livestock according to claim 9, characterized in that: the residual sludge generated by the air flotation machine (3) and the secondary sedimentation tank (13) enters a sludge tank (19), the supernatant of the sludge tank (19) flows back to the oil separation regulating tank (1), the sludge in the sludge tank (19) is transported and disposed after being subjected to filter pressing and dehydration by a sludge dewatering machine (21), and the filter pressing liquid returns to the oil separation regulating tank (1).
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