CN214142029U - Biochemical-physical coupling advanced treatment system for kitchen waste fermentation wastewater or leachate - Google Patents
Biochemical-physical coupling advanced treatment system for kitchen waste fermentation wastewater or leachate Download PDFInfo
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Abstract
The utility model discloses a biochemical-physicochemical coupling advanced treatment system for kitchen waste fermentation wastewater or leachate, wherein the pretreatment system comprises a multistage grid, a vertical flow sedimentation tank, an oil separation sedimentation tank, a rotary drum grid and a sewage tank which are sequentially connected, and sewage in the sewage treatment tank enters a biochemical treatment system after passing through a combined air flotation sedimentation integrated machine; the biochemical treatment system comprises an adjusting tank, the effluent of the combined air flotation and sedimentation integrated machine enters the adjusting tank, water in the adjusting tank is pumped into an anaerobic reaction system through a pump, enters a shortcut nitrification system after anaerobic reaction and then sequentially enters a first sedimentation tank and a first pH adjusting tank, enters a second pH adjusting tank after nitrification treatment, wastewater in the second pH adjusting tank enters an ammonia oxidation system, the effluent of the ammonia oxidation system enters a second sedimentation tank, and finally reaches the standard and is discharged after being treated by an autotrophic denitrification system and a flocculation sedimentation system. The effluent can stably reach the discharge standard of the pollution control standard of the domestic garbage landfill (GB 16889-2008).
Description
Technical Field
The utility model relates to a biochemical-materialization coupling advanced treatment system of kitchen garbage fermentation waste water or filtration liquid belongs to water treatment technical field.
Background
At present, kitchen waste fermentation wastewater and leachate treatment facilities are complex and high in cost, and the discharge standard after treatment can only meet the requirements of 'first-class standard' of Integrated wastewater discharge Standard (GB8978-1996) and 'B-class' of Water quality Standard for wastewater discharge into urban sewer 2015 (GB/T31962-. Namely total nitrogen is less than or equal to 70 mg/L.
For example, the patent of CN 106430845A discloses a technology of a kitchen waste wastewater treatment device, wastewater is sequentially treated by an oil separation primary sedimentation tank, an adjusting tank, a first pH adjusting tank, an ammonia stripping tower, a second pH adjusting tank, an A/O biochemical treatment device, a sedimentation tank, an ozone reactor, an aeration biological filter and a disinfection tank, and pollutants such as COD, BOD5, NH3-N, TN, TP, SS, chromaticity and the like in the treated wastewater can stably reach the requirements of the integrated wastewater discharge standard (GB 106430845-1996) "primary standard" and the wastewater discharge urban sewer water quality standard (GB/T31962) 2015) "level B".
The document of CN 107352746A discloses a method for treating kitchen waste anaerobic digestion wastewater, which is used for treating wastewater generated in other processes after kitchen waste slurry is subjected to anaerobic digestion and dehydration and kitchen waste treatment. The wastewater is sequentially subjected to oil removal primary sedimentation, water quantity and water quality regulation, pH value first regulation, free ammonia stripping in an ammonia stripping tower, pH value second regulation, A/O biochemical treatment, sedimentation treatment, air floatation treatment, Fenton reactor treatment, coagulating sedimentation tank treatment and aeration biological filter tank treatmentAnd (6) processing. The anaerobic digestion wastewater of the kitchen waste is treated by the process, and COD and BOD in the wastewater5、NH3Pollutants such as-N, TP, chromaticity and the like can stably meet the requirements of 'first-class standard' of Integrated wastewater discharge Standard (GB N, TP-1996), and TN is less than 70 mg/L.
The quality of effluent water of anaerobic digestion wastewater of kitchen waste treated by the prior art is improved, but the anaerobic digestion wastewater of kitchen waste can only meet the requirements of 'first-class standard' of Integrated wastewater discharge Standard (GB8978-1996) and 'B-class' of Water quality Standard of wastewater discharge to urban sewer (GB/T31962 2015), namely, the total nitrogen is less than or equal to 70 mg/L. With the implementation of new rice discharge standards and the further improvement of water treatment standards, the existing treatment method is difficult to reach the standards, such as the regulations in table 1 of the pollution control standard of the domestic refuse landfill (GB 16889-. The total nitrogen is required to be less than 40mg/L, and the existing treatment technology cannot meet the requirement. Moreover, the reduction of total nitrogen and ammonia nitrogen from a very high concentration to a relatively low concentration is easy to achieve, and the reduction from 70mg/L to 40mg/L is difficult for the technicians in the field.
TABLE 1 pollution control Standard for municipal solid waste landfill (GB 16889-
| Serial number | Controlling contaminants | Emission mass concentration limit | Pollutant emission monitoring position |
| 1 | Chroma (dilution multiple) | 40 | Discharge port of conventional sewage treatment facility |
| 2 | Chemical Oxygen Demand (COD)Cr)/(mg/L) | 100 | Discharge port of conventional sewage treatment facility |
| 3 | Biochemical Oxygen Demand (BOD)5)/(mg/L) | 30 | Discharge port of conventional sewage treatment facility |
| 4 | Suspended matter/(mg/L) | 30 | Discharge port of conventional sewage treatment facility |
| 5 | Total nitrogen/(mg/L) | 40 | Discharge port of conventional sewage treatment facility |
| 6 | Ammonia nitrogen/(mg/L) | 25 | Discharge port of conventional sewage treatment facility |
| 7 | Total phosphorus/(mg/L) | 3 | Discharge port of conventional sewage treatment facility |
| 8 | Faecal coliform count/(number/L) | 10000 | Discharge port of conventional sewage treatment facility |
| 9 | Total mercury/(mg/L) | 0.001 | Discharge port of conventional |
| 10 | Total cadmium/(mg/L) | 0.01 | Discharge port of conventional sewage treatment facility |
| 11 | Total chromium/(mg/L) | 0.1 | Discharge port of conventional |
| 12 | Hexavalent chromium/(mg/L) | 0.05 | Discharge port of conventional |
| 13 | Total arsenic/(mg/L) | 0.1 | Discharge port of conventional sewage treatment facility |
| 14 | Total lead/(mg/L) | 0.1 | Conventional sewage treatment facilityDischarge port |
SUMMERY OF THE UTILITY MODEL
To the technical problem, an object of the utility model is to provide a kitchen garbage fermentation waste water or leachate biochemistry-materialization coupling advanced treatment system can reach the effect of degree of depth denitrogenation, goes out the water and can stably reach the emission standard of "domestic waste landfill pollution control standard" (GB 16889-.
In order to realize the purpose, the technical scheme of the utility model is that: the utility model provides a kitchen garbage fermentation waste water or leachate biochemistry-materialization coupling advanced treatment system, includes pretreatment systems and biochemical treatment system, its characterized in that: the pretreatment system comprises a multistage grid, a vertical flow sedimentation tank, an oil separation sedimentation tank, a rotary drum grid and a sewage tank which are connected in sequence, and sewage in the sewage treatment tank enters the biochemical treatment system after passing through the combined air flotation sedimentation integrated machine;
biochemical treatment system includes the equalizing basin, the play water of combination air supporting sediment all-in-one gets into the equalizing basin, water in the equalizing basin passes through the pump and goes into anaerobic reaction system, gets into first sedimentation tank and first pH equalizing basin in proper order after anaerobic reaction again, and the waste water after adjusting PH gets into the short distance system of nitrifying, gets into the second pH equalizing basin after nitrifying the processing, the waste water entering ammonia oxidation system of second pH equalizing basin, the play water of ammonia oxidation system gets into the second sedimentation tank, discharges up to standard after autotrophic denitrification system and flocculation and precipitation system are handled at last.
In the scheme, the method comprises the following steps: the multi-stage grating comprises a grating groove, a rotary type grating dirt remover and a screen plate type grating dirt remover which are sequentially connected, kitchen waste fermentation wastewater or percolate enters the grating groove, and an aeration device is arranged in the grating groove.
In the scheme, the method comprises the following steps: and the grid slag of the grid groove, the rotary type grid dirt remover and the screen plate type grid dirt remover is transported and treated.
In the scheme, the method comprises the following steps: the anaerobic reaction system selects one of a UASB reactor, an IC reactor and an ABR reactor; the short-cut nitrification system selects one of an SBR reactor, a SHARON reactor and a CSTR reactor; the ammonia oxidation system selects one of a UASB anaerobic reactor, an AF anaerobic reactor, a UFB anaerobic reactor and an AMBS anaerobic reactor; the autotrophic denitrification system adopts an upflow biological aerated filter.
In the scheme, the method comprises the following steps: the anaerobic reaction system adopts a UASB reactor; the short-cut nitrification system adopts an SBR reactor; and the ammonia oxidation system adopts a UASB anaerobic reactor.
In the scheme, the method comprises the following steps: and a demulsifier, PAC and PAM are added into the combined air floatation and precipitation integrated machine, and PAC and PAM are added into the flocculation and precipitation system.
In the scheme, the method comprises the following steps: and sludge in the vertical flow sedimentation tank, sludge in the oil separation sedimentation tank, grid slag in the rotary drum grid, scum and sludge in the combined air flotation sedimentation all-in-one machine, sludge in the anaerobic reaction system, sludge in the first sedimentation tank, sludge in the shortcut nitrification system, sludge in the second sedimentation tank and sludge in the flocculation sedimentation system all enter the sludge tank and are transported outside after being centrifugally dewatered.
The utility model discloses following beneficial effect has: the utility model discloses a kitchen garbage fermentation waste water and filtration liquid processing method waste water are in proper order through pretreatment systems, anaerobic reaction system, short distance digestive system, anaerobic ammonia oxidation system, autotrophic denitrification system, coagulating sedimentation system processing back. COD in kitchen waste fermentation wastewaterCr、 BOD5、NH3Pollutants such as-N and the like can be effectively degraded, and COD in the treated wastewaterCr、BOD5The pollutants such as TN, TP, chromaticity and the like can stably reach the regulations of table 1 of the pollution control Standard of municipal solid waste landfill (GB 16889-2008), and TN is less than 40 mg/L. High treatment efficiency, low cost and simple operation management.
Drawings
Fig. 1 is a process flow diagram of the present invention.
Detailed Description
The invention will be further described by way of examples with reference to the accompanying drawings:
example 1
The water quality of the feed water of anaerobic digestion waste water of kitchen waste is shown in the following table 2:
TABLE 2
As shown in figure 1, the biochemical-physicochemical coupling advanced treatment system for kitchen waste fermentation wastewater or leachate consists of a pretreatment system and a biochemical treatment system.
The pretreatment system consists of a multi-stage grid, a vertical flow sedimentation tank 4, an oil separation sedimentation tank 5, a rotary drum grid 6, a sewage tank 7 and a combined air flotation sedimentation all-in-one machine 8.
The multi-stage grating consists of a grating groove 1, a rotary grating dirt separator 2 and a mesh plate type grating dirt separator 3, wherein the grating of the grating groove 1 is a thick grating and is used for intercepting large sundries and residues. The rotary type grill cleaner 2 and the mesh plate type grill cleaner 3 are thin grilles for intercepting thin residue. An aeration device is arranged in the grating groove 1. And the grid slag of the grid groove 1, the rotary type grid sewage remover 2 and the screen plate type grid sewage remover 3 is transported and treated.
The biochemical treatment system comprises a regulating tank 9, an anaerobic reaction system 10, a first sedimentation tank 11, a first pH regulating tank 12, a shortcut nitrification system 13, a second pH regulating tank 14, an ammonia oxidation system 15, a second sedimentation tank 16, an autotrophic denitrification system 17 and a flocculation sedimentation system 18 which are connected in sequence.
The anaerobic reaction system 10 selects one of UASB reactor, IC reactor and ABR reactor; the shortcut nitrification system 13 selects one of an SBR reactor, a SHARON reactor and a CSTR reactor; the ammonia oxidation system 15 selects one of a UASB anaerobic reactor, an AF anaerobic reactor, a UFB anaerobic reactor and an AMBS anaerobic reactor; the autotrophic denitrification system 17 adopts an upflow biological aerated filter. The flocculation system 18 is a conventional flocculation system and includes a reaction tank and a sedimentation tank.
Preferably, the anaerobic reaction system is a UASB reactor. The short-cut nitrification system adopts an SBR reactor. The ammoxidation system selects a UASB anaerobic reactor.
Sludge in the vertical flow sedimentation tank 4, sludge in the oil separation sedimentation tank 5, grid slag in the rotary drum grid 6, scum and sludge in the combined air flotation sedimentation all-in-one machine 8, sludge in the anaerobic reaction system 10, sludge in the first sedimentation tank 11, sludge in the shortcut nitrification system 13, sludge in the second sedimentation tank 16 and sludge in the flocculation sedimentation system 18 all enter a sludge tank 19, are centrifugally dewatered by a centrifugal dewatering machine 20 and are transported outwards.
The biochemical-physicochemical coupling advanced treatment method for kitchen waste fermentation wastewater or leachate comprises the following steps:
a) the kitchen waste fermentation wastewater or leachate firstly enters a pretreatment system, and most of vegetable oil and scum contained in the wastewater are removed under the action of the pretreatment system. The anaerobic fermentation waste water or leachate of the kitchen waste enters a vertical flow sedimentation tank 4 for sedimentation after being intercepted by each grade of grating, then enters an oil separation sedimentation tank 5 for removing most of vegetable oil and sediments, the floating oil in the oil separation sedimentation tank 5 is subjected to qualified unit treatment, the waste water from the oil separation sedimentation tank 5 enters a rotary drum grating 6 for further removing sediments, and then enters a combined air flotation and sedimentation integrated machine 8 for further removing impurities such as floating oil, suspended matters and the like, and then enters a regulating tank 9 for regulating the water quality and the water quantity of the waste water. And a demulsifier, PAC and PAM are added into the combined air floatation and precipitation integrated machine 8.
b) The pretreated wastewater enters an anaerobic reaction system, and most organic pollutants in the wastewater are effectively removed. The residence time of the anaerobic reaction system is 5-96 h. Effectively remove most COD in wastewaterCr、 BOD5And the like.
c) The effluent after anaerobic treatment enters a first sedimentation tank 11, sludge enters a sludge tank, supernatant enters a first pH adjusting tank 12, the pH value of the wastewater is adjusted to be within the range of 6.5-7.5, the effluent of the first pH adjusting tank 12 enters a short-range nitrification system 13, ammonia nitrogen is oxidized into nitrite nitrogen under the action of nitrosobacteria in the short-range nitrification system 13, and part of COD (chemical oxygen demand) is removed at the same timeCrAnd BOD5And the residence time of the short-cut nitrification system 13 is 6-48 h. Can further remove partial organic matters, N, P and other pollutants in the wastewater, and simultaneously convert partial ammonia nitrogen into nitrite nitrogen.
d) Short-cut nitrification system 13The effluent enters a second pH regulating tank 14, the pH value of the wastewater is regulated to be within the range of 7.0-8.0, the effluent of the second pH regulating tank 14 enters an ammonia oxidation system 15, the total nitrogen is converted into nitrogen gas under the action of ammonia oxidizing bacteria and released, most of the total nitrogen contained in the wastewater is removed, and meanwhile, part of COD (chemical oxygen demand) is removedCr、BOD5And the like. The retention time of the ammonia oxidation system is 4-72 h. Removing partial organic matters, ammonia nitrogen, total nitrogen and other pollutants contained in the wastewater.
e) The effluent of the ammonia oxidation system 15 enters a second sedimentation tank 16 for mud-water separation, the sludge enters a sludge tank, the supernatant enters an autotrophic denitrification system 17, the retention time of the autotrophic denitrification system 17 is 0.5-4 h, and pollutants such as total nitrogen, total phosphorus and the like contained in the wastewater are further removed under the action of autotrophic denitrifying bacteria;
f) the effluent of the autotrophic denitrification system 17 enters a flocculation precipitation system, pollutants such as refractory organic matters, total phosphorus, chromaticity and the like in the wastewater are further removed by adding a flocculating agent and a coagulant aid (PAC and PAM), and finally the wastewater is discharged after reaching the standard. Emission values are given in Table 3
TABLE 3
The effluent can stably meet the requirement of pollutant emission quality concentration limit in the pollution control standard of domestic refuse landfill (GB 16889 + 2008) in Table 1.
The present invention is not limited to the above embodiments, and those skilled in the art can understand that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (6)
1. The utility model provides a kitchen garbage fermentation waste water or leachate biochemistry-materialization coupling advanced treatment system, includes pretreatment systems and biochemical treatment system, its characterized in that: the pretreatment system comprises a multistage grid, a vertical flow sedimentation tank, an oil separation sedimentation tank, a rotary drum grid and a sewage tank which are connected in sequence, and sewage in the sewage treatment tank enters the biochemical treatment system after passing through the combined air flotation sedimentation integrated machine;
biochemical treatment system includes the equalizing basin, the play water of combination air supporting sediment all-in-one gets into the equalizing basin, water in the equalizing basin passes through the pump and goes into anaerobic reaction system, gets into first sedimentation tank and first pH equalizing basin in proper order after anaerobic reaction again, and the waste water after adjusting PH gets into the short distance system of nitrifying, gets into the second pH equalizing basin after nitrifying the processing, the waste water entering ammonia oxidation system of second pH equalizing basin, the play water of ammonia oxidation system gets into the second sedimentation tank, discharges up to standard after autotrophic denitrification system and flocculation and precipitation system are handled at last.
2. The biochemical-physicochemical coupling advanced treatment system for kitchen waste fermentation wastewater or percolate, according to claim 1, is characterized in that: the multi-stage grating comprises a grating groove, a rotary type grating dirt remover and a screen plate type grating dirt remover which are sequentially connected, kitchen waste fermentation wastewater or percolate enters the grating groove, and an aeration device is arranged in the grating groove.
3. The biochemical-physicochemical coupling advanced treatment system for kitchen waste fermentation wastewater or percolate, according to claim 2, is characterized in that: and the grid slag of the grid groove, the rotary type grid dirt remover and the screen plate type grid dirt remover is transported and treated.
4. The biochemical-physicochemical coupled advanced treatment system for kitchen waste fermentation wastewater or leachate according to any of claims 1-3, characterized in that: the anaerobic reaction system selects one of a UASB reactor, an IC reactor and an ABR reactor; the short-cut nitrification system selects one of an SBR reactor, a SHARON reactor and a CSTR reactor; the ammonia oxidation system selects one of a UASB anaerobic reactor, an AF anaerobic reactor, a UFB anaerobic reactor and an AMBS anaerobic reactor; the autotrophic denitrification system adopts an upflow biological aerated filter.
5. The biochemical-physicochemical coupling advanced treatment system for kitchen waste fermentation wastewater or percolate, according to claim 4, is characterized in that: the anaerobic reaction system adopts a UASB reactor; the short-cut nitrification system adopts an SBR reactor; and the ammonia oxidation system adopts a UASB anaerobic reactor.
6. The biochemical-physicochemical coupling advanced treatment system for kitchen waste fermentation wastewater or percolate, according to claim 5, is characterized in that: and sludge in the vertical flow sedimentation tank, sludge in the oil separation sedimentation tank, grid slag in the rotary drum grid, scum and sludge in the combined air flotation sedimentation all-in-one machine, sludge in the anaerobic reaction system, sludge in the first sedimentation tank, sludge in the shortcut nitrification system, sludge in the second sedimentation tank and sludge in the flocculation sedimentation system all enter the sludge tank and are transported outside after being centrifugally dewatered.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114275975A (en) * | 2021-12-31 | 2022-04-05 | 天津环科环境规划科技发展有限公司 | Domestic sewage treatment device and method and application |
| CN115745299A (en) * | 2022-11-30 | 2023-03-07 | 中铁环境科技工程有限公司 | Excrement and sewage wastewater treatment device and using method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114275975A (en) * | 2021-12-31 | 2022-04-05 | 天津环科环境规划科技发展有限公司 | Domestic sewage treatment device and method and application |
| CN114275975B (en) * | 2021-12-31 | 2023-11-07 | 天津环科环境规划科技发展有限公司 | Domestic sewage treatment device and method and application |
| CN115745299A (en) * | 2022-11-30 | 2023-03-07 | 中铁环境科技工程有限公司 | Excrement and sewage wastewater treatment device and using method |
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