CN117800524A - Hydropower station barrage sewage sludge resource utilization system and method - Google Patents
Hydropower station barrage sewage sludge resource utilization system and method Download PDFInfo
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- CN117800524A CN117800524A CN202311831357.XA CN202311831357A CN117800524A CN 117800524 A CN117800524 A CN 117800524A CN 202311831357 A CN202311831357 A CN 202311831357A CN 117800524 A CN117800524 A CN 117800524A
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000010801 sewage sludge Substances 0.000 title claims description 26
- 239000010802 sludge Substances 0.000 claims abstract description 132
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- 230000018044 dehydration Effects 0.000 claims abstract description 60
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 60
- 238000004064 recycling Methods 0.000 claims abstract description 59
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 38
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- 238000010564 aerobic fermentation Methods 0.000 claims abstract description 21
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 21
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- 230000001546 nitrifying effect Effects 0.000 claims description 23
- 238000010992 reflux Methods 0.000 claims description 20
- 238000006243 chemical reaction Methods 0.000 claims description 16
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 13
- 229910052698 phosphorus Inorganic materials 0.000 claims description 13
- 239000011574 phosphorus Substances 0.000 claims description 13
- 239000002245 particle Substances 0.000 claims description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 8
- 239000003337 fertilizer Substances 0.000 claims description 8
- 238000005189 flocculation Methods 0.000 claims description 8
- 230000016615 flocculation Effects 0.000 claims description 8
- 229910052760 oxygen Inorganic materials 0.000 claims description 8
- 239000001301 oxygen Substances 0.000 claims description 8
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- 238000009264 composting Methods 0.000 claims description 7
- 239000002957 persistent organic pollutant Substances 0.000 claims description 7
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- 239000004576 sand Substances 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 4
- 239000013043 chemical agent Substances 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 4
- 239000003814 drug Substances 0.000 claims description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 3
- 239000001569 carbon dioxide Substances 0.000 claims description 3
- 239000003344 environmental pollutant Substances 0.000 claims description 3
- 238000000855 fermentation Methods 0.000 claims description 3
- 230000004151 fermentation Effects 0.000 claims description 3
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 claims description 3
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- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention provides a hydropower station barrage sewage and sludge recycling system and a hydropower station barrage sewage and sludge recycling method, which are used for recycling sewage and sludge in a hydropower station barrage, and comprise the following steps: the pretreatment component is used for intercepting larger solid matters in the sewage in a suspended or floating state; an integrated device biological treatment assembly; the advanced treatment assembly of the integrated equipment comprises an inclined plate sedimentation tank, a quartz filter and an ultraviolet disinfection canal, and sewage sequentially passes through the inclined plate sedimentation tank, the quartz filter and the ultraviolet disinfection canal to obtain reclaimed water which can be recycled; the sludge preliminary concentration and dehydration assembly comprises a sludge tank and a sludge concentration and dehydration integrated machine, wherein sludge obtained by the aerobic tank and the inclined plate sedimentation tank is subjected to preliminary concentration and dehydration in the concentration and dehydration integrated machine and then is fermented and composted with biochar in the aerobic fermentation integrated device to obtain organic fertilizer; the invention solves the problems of high sewage treatment cost, environmental protection and difficult long-time sustainable operation in the barrage of the medium-and-small-sized hydropower station in the prior art.
Description
Technical Field
The invention relates to the technical field of treatment and disposal of sewage and sludge in hydropower station barrage, in particular to a hydropower station barrage sewage and sludge recycling system and method.
Background
With the importance of the national environmental protection, the treatment and utilization of domestic sewage and sludge in medium and small hydropower stations becomes a new subject, and most of the medium and small hydropower stations are in remote areas, and the domestic sewage and sludge cannot be intensively treated and utilized by bringing the sewage into a town sewage collecting and treating system without conditions.
At present, a sewage treatment plant is built in a domestic large hydropower station, and the sludge is generally treated in a centralized way by external transportation. The medium-and small-sized hydropower stations usually construct pipeline nanotubes to sewage and sludge centralized treatment plants in nearby cities or villages, or directly discharge after simple treatment. The two methods have limitations in investment amount, construction difficulty, environmental influence and the like, so that no existing scheme for the medium-and small-sized hydropower station can solve the problem of sewage treatment in a barrage at low cost, simultaneously meets the environmental protection requirement and can continuously operate for a long time.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the present invention is to provide a system and a method for recycling sewage and sludge in a hydropower station barrage, which solve the problems of high cost, environmental protection and difficult long-time sustainable operation of sewage treatment in a barrage of a small and medium hydropower station in the prior art.
In order to solve the technical problems, the invention provides a hydropower station barrage sewage and sludge recycling system, which is used for recycling sewage and sludge in a hydropower station barrage, and comprises the following components:
the pretreatment component is used for intercepting larger solid substances in the sewage in a suspended or floating state;
the integrated equipment biological treatment assembly is communicated with the pretreatment assembly and comprises an anaerobic tank for releasing phosphorus, an anoxic tank for performing denitrification reaction and an aerobic tank for performing nitrification reaction to remove biochemical oxygen demand, and sewage is treated by the pretreatment assembly and sequentially discharged into the anaerobic tank, the anoxic tank and the aerobic tank;
the integrated equipment advanced treatment assembly is communicated with the integrated equipment biological treatment assembly and comprises an inclined plate sedimentation tank for realizing rapid sedimentation through flocculation sedimentation, a quartz filter for further removing suspended and colloidal particles in water and an ultraviolet disinfection canal for sterilization and disinfection, wherein the sewage sequentially passes through the inclined plate sedimentation tank, the quartz filter and the ultraviolet disinfection canal to obtain reclaimed water which can be recycled;
the sludge preliminary concentration and dehydration assembly is communicated with the advanced treatment assembly of the integrated equipment and comprises a sludge tank for collecting and storing sludge and a sludge concentration and dehydration integrated machine for carrying out preliminary concentration and dehydration on the sludge, and the sludge obtained by the aerobic tank and the inclined plate sedimentation tank is sequentially discharged into the sludge tank and the concentration and dehydration integrated machine and is subjected to preliminary concentration and dehydration in the concentration and dehydration integrated machine;
and the aerobic fermentation integrated device and the sludge preliminary concentration and dehydration assembly complete the preliminary concentration and dehydration of sludge and the charcoal fermentation composting in the aerobic fermentation integrated device, so as to obtain the organic fertilizer which can be used as fertilizer.
As a more preferable scheme, the pretreatment component comprises a coarse and fine grating and a advection grit chamber for removing sand, and the sewage sequentially flows through the coarse and fine grating and the advection grit chamber, so that the content of floating suspended pollutants in the sewage is reduced, the load of a subsequent treatment process is reduced, and the safe and stable operation of the subsequent process is ensured.
As a more preferable scheme, the hydropower station barrage sewage sludge recycling system also comprises a dosing assembly, wherein the dosing assembly is used for adding chemical agents such as polyaluminium chloride PAC, polyacrylamide PAM and the like into an inclined plate sedimentation tank, so that organic pollutants in water are quickly mixed, flocculated, sedimentated and filtered by a quartz filter, and suspended matters and total phosphorus are largely removed.
As a more preferred aspect, the dosing assembly is further configured to dose a carbon source into the anaerobic tank.
As a more preferable scheme, when the dosing assembly is used for dosing the medicament into the inclined plate sedimentation tank and the anaerobic tank, the dosing amount of the medicament is adjusted according to the sewage quality.
As a more preferable scheme, the hydropower station barrage sewage and sludge recycling system further comprises a sludge backflow structure, and the sludge obtained by sedimentation of the sewage flowing through the inclined plate sedimentation tank is transmitted to the anaerobic tank through the sludge backflow structure and is fully treated by the biological treatment component of the integrated equipment again.
As a more preferable scheme, the sludge return structure comprises a sludge return pipeline and a sludge return pump connected with the sludge return pipeline.
As a more preferable scheme, the hydropower station barrage sewage and sludge recycling system further comprises a nitrifying liquid backflow structure, and sewage in the aerobic tank flows back into the anoxic tank through the nitrifying liquid backflow structure, so that microorganisms in the activated sludge are fully utilized to adsorb, oxidize and decompose organic pollutants in the sewage, the purposes of removing organic matters, denitrifying and dephosphorizing are achieved, and finally stable matters such as carbon dioxide, water and the like are formed.
As a more preferable scheme, the nitrifying liquid reflux structure comprises a nitrifying liquid reflux pipeline and a nitrifying liquid reflux pump connected with the nitrifying liquid reflux pipeline.
As a more preferable scheme, the hydropower station barrage sewage and sludge recycling system comprises a sewage pipeline and a sludge pipeline, wherein the pretreatment component, the anaerobic tank, the anoxic tank, the aerobic tank, the inclined plate sedimentation tank, the quartz filter and the ultraviolet disinfection canal are communicated through the sewage pipeline in sequence, and the aerobic tank, the inclined plate sedimentation tank and the sludge tank are communicated through the sludge pipeline.
In order to solve the problems, the invention also provides a hydropower station barrage sewage recycling method, which utilizes the hydropower station barrage sewage sludge recycling system, comprising the following steps:
the sewage of the hydropower station barrage is accessed into a pretreatment component to intercept larger solid matters in a suspended or floating state in the sewage;
discharging the sewage treated by the pretreatment component into a biological treatment component of integrated equipment, and sequentially passing through an anaerobic tank for releasing phosphorus, an anoxic tank for performing denitrification reaction and an aerobic tank for performing nitrification reaction to remove biochemical oxygen demand;
discharging the sewage treated by the integrated equipment biological treatment assembly into an integrated equipment advanced treatment assembly, and sequentially passing through an inclined plate sedimentation tank for realizing rapid sedimentation by flocculation sedimentation, a quartz filter for further removing suspended and colloidal particles in water and an ultraviolet disinfection canal for sterilization and disinfection to obtain reclaimed water which can be recycled;
the sludge obtained by the aerobic tank and the inclined plate sedimentation tank is discharged into a sludge primary concentration and dehydration assembly, sequentially passes through the sludge tank and the concentration and dehydration integrated machine, and completes primary concentration and dehydration in the concentration and dehydration integrated machine;
and fermenting and composting the sludge subjected to preliminary concentration and dehydration and the biochar in the aerobic fermentation integrated device together, so as to obtain the organic fertilizer which can be used as a fertilizer.
As described above, the hydropower station barrage sewage sludge recycling system and method of the invention have the following beneficial effects: when the hydropower station barrage sewage and sludge recycling system is used, firstly, the hydropower station barrage sewage is connected into the pretreatment component to intercept larger solid matters in suspension or floating state in the sewage; then the sewage treated by the pretreatment component is discharged into a biological treatment component of the integrated equipment, and sequentially passes through an anaerobic tank for releasing phosphorus, an anoxic tank for carrying out denitrification reaction and an aerobic tank for carrying out nitration reaction to remove biochemical oxygen demand; further, the sewage treated by the biological treatment component of the integrated equipment is discharged into the advanced treatment component of the integrated equipment, and sequentially passes through an inclined plate sedimentation tank for realizing rapid sedimentation by flocculation sedimentation, a quartz filter for further removing suspended and colloidal particles in water and an ultraviolet disinfection canal for sterilization and disinfection, so that reclaimed water which can be recycled is obtained; further, the sludge obtained by the aerobic tank and the inclined plate sedimentation tank is discharged into a sludge preliminary concentration and dehydration assembly, sequentially passes through the sludge tank and the concentration and dehydration integrated machine, and completes preliminary concentration and dehydration in the concentration and dehydration integrated machine; finally, fermenting and composting the sludge subjected to preliminary concentration and dehydration with biochar in an aerobic fermentation integrated device, thereby obtaining the organic fertilizer which can be used as a fertilizer; the hydropower station barrage sewage sludge recycling system disclosed by the invention processes the sewage to obtain reclaimed water which can be used as greening irrigation, factory landscape water, toilet flushing and the like and organic fertilizer which can be used as greening fertilization, so that the sewage is processed, reclaimed water and organic fertilizer which can meet barrage life production are obtained, and meanwhile, the environment-friendly requirement is met, so that the hydropower station barrage sewage sludge recycling system has the capability of continuous operation, and further, the hydropower station barrage sewage sludge recycling system disclosed by the invention is integrated into an integrated device, occupies a small area and reduces construction cost;
the hydropower station barrage sewage recycling utilization method disclosed by the invention not only treats sewage, but also obtains reclaimed water and organic fertilizer which can meet the production of barrage life, meets the requirement of sewage recycling utilization, and simultaneously meets the requirement of environmental protection, and the hydropower station barrage sewage recycling utilization system is green and environment-friendly and has resource circulation.
In summary, in this embodiment, the hydropower station barrage sewage and sludge recycling system and method of the invention obtains reclaimed water and organic fertilizer which can meet barrage life production through the pretreatment component, the integrated equipment biological treatment component, the integrated equipment advanced treatment component, the sludge preliminary concentration and dehydration component and the aerobic fermentation integrated device, and meanwhile, the integrated integration level is high, the occupied area is small, the construction cost is reduced, and the problems of high sewage treatment cost, environmental protection and difficult long-time sustainable operation in barrages of the medium-and small-sized hydropower stations in the prior art are solved.
Drawings
FIG. 1 is a schematic diagram of a hydropower station barrage sewage sludge recycling system of the present invention;
FIG. 2 is a schematic diagram of the method for recycling sewage and sludge in a hydropower station barrage of the invention.
Description of element reference numerals
1. Pretreatment assembly
11. Coarse and fine grille
12. Advection sand setting pond
2. Biological treatment assembly of integrated equipment
21. Anaerobic tank
22. Anoxic tank
23. Aerobic tank
3. Advanced treatment assembly of integrated equipment
31. Inclined plate sedimentation tank
32. Quartz filter
33. Ultraviolet disinfection canal
4. Dosing assembly
5. Sludge preliminary concentration dehydration subassembly
51. Sludge pool
52. Sludge concentration dehydration all-in-one
6. Aerobic fermentation integrated device
7. Nitrifying liquid reflux structure
8 mud reflux structure
Detailed Description
Further advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure of the present invention, which is described by the following specific examples.
It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the invention to the extent that it can be practiced, since modifications, changes in the proportions, or otherwise, used in the practice of the invention, are not intended to be critical to the essential characteristics of the invention, but are intended to fall within the spirit and scope of the invention. The following detailed description is not to be taken in a limiting sense, and the scope of embodiments of the present application is defined only by the claims of the issued patent. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Spatially relative terms, such as "upper," "lower," "left," "right," "lower," "upper," and the like, may be used herein to facilitate a description of one element or feature as illustrated in the figures as being related to another element or feature.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," "held," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Furthermore, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context indicates otherwise. It will be further understood that the terms "comprises," "comprising," "includes," and/or "including" specify the presence of stated features, operations, elements, components, items, categories, and/or groups, but do not preclude the presence, presence or addition of one or more other features, operations, elements, components, items, categories, and/or groups. The terms "or" and/or "as used herein are to be construed as inclusive, or meaning any one or any combination. Thus, "A, B or C" or "A, B and/or C" means "any of the following: a, A is as follows; b, a step of preparing a composite material; c, performing operation; a and B; a and C; b and C; A. b and C). An exception to this definition will occur only when a combination of elements, functions or operations are in some way inherently mutually exclusive.
As shown in FIG. 1, the invention provides a hydropower station barrage sewage and sludge recycling system for recycling sewage and sludge in a hydropower station barrage, which comprises:
the pretreatment assembly 1 is used for intercepting larger solid matters in the sewage in a suspended or floating state;
an integrated equipment biological treatment assembly 2, wherein the integrated equipment biological treatment assembly 2 is communicated with the pretreatment assembly 1 and comprises an anaerobic tank 21 for releasing phosphorus, an anoxic tank 22 for performing denitrification reaction and an aerobic tank 23 for performing nitrification reaction to remove biochemical oxygen demand, and sewage is treated by the pretreatment assembly 1 and sequentially discharged into the anaerobic tank 21, the anoxic tank 22 and the aerobic tank 23;
the integrated equipment advanced treatment assembly 3 is communicated with the integrated equipment biological treatment assembly 2 and comprises an inclined plate sedimentation tank 31 for realizing rapid sedimentation through flocculation sedimentation, a quartz filter 32 for further removing suspended and colloidal particles in water and an ultraviolet disinfection canal 33 for sterilization and disinfection, wherein the sewage sequentially passes through the inclined plate sedimentation tank 31, the quartz filter 32 and the ultraviolet disinfection canal 33 to obtain reclaimed water which can be recycled;
the sludge preliminary concentration and dehydration assembly 5 is communicated with the advanced treatment assembly 3 of the integrated equipment, and comprises a sludge tank 51 for collecting and storing sludge and a sludge concentration and dehydration integrated machine 52 for carrying out preliminary concentration and dehydration on the sludge, wherein the sludge obtained by the inclined plate sedimentation tank 31 is sequentially discharged into the sludge tank 51 and the concentration and dehydration integrated machine, and the preliminary concentration and dehydration are finished in the concentration and dehydration integrated machine;
and the aerobic fermentation integrated device 6 is used for completing the fermentation composting of the sludge subjected to preliminary concentration and dehydration and the biochar in the aerobic fermentation integrated device 6 by the aerobic fermentation integrated device 6 and the sludge preliminary concentration and dehydration assembly 5, so as to obtain the organic fertilizer which can be used as a fertilizer.
When the hydropower station barrage sewage and sludge recycling system is used, firstly, the hydropower station barrage sewage is connected into the pretreatment component 1 to intercept larger solid matters in suspension or floating state in the sewage; the sewage treated by the pretreatment component 1 is discharged into the biological treatment component 2 of the integrated equipment, and sequentially passes through an anaerobic tank 21 for releasing phosphorus, an anoxic tank 22 for carrying out denitrification reaction and an aerobic tank 23 for carrying out nitrification reaction to remove biochemical oxygen demand; further, the sewage treated by the integrated equipment biological treatment assembly 2 is discharged into an integrated equipment advanced treatment assembly 3, and sequentially passes through an inclined plate sedimentation tank 31 for realizing rapid sedimentation by flocculation sedimentation, a quartz filter 32 for further removing suspended and colloidal particles in water and an ultraviolet disinfection canal 33 for sterilization and disinfection, so as to obtain reclaimed water which can be recycled; further, the sludge obtained by the aerobic tank 23 and the inclined plate sedimentation tank 31 is discharged into a sludge preliminary concentration and dehydration assembly 5, sequentially passes through the sludge tank 51 and a concentration and dehydration integrated machine, and is subjected to preliminary concentration and dehydration in the concentration and dehydration integrated machine; finally, the sludge subjected to preliminary concentration and dehydration and the biochar in the aerobic fermentation integrated device 6 are fermented and composted, so that the organic fertilizer which can be used as a fertilizer is obtained; the hydropower station barrage sewage sludge recycling system provided by the invention processes the sewage to obtain reclaimed water which can be used as greening irrigation, factory landscape water, toilet flushing and the like and organic fertilizer which can be used as greening fertilization, so that the sewage is processed, reclaimed water and organic fertilizer which can meet barrage life production are obtained, and meanwhile, the environment-friendly requirement is met, so that the hydropower station barrage sewage sludge recycling system has the capability of continuous operation.
In this embodiment, as shown in fig. 1, the pretreatment assembly 1 includes a coarse and fine grid 11 and a advection grit chamber 12 for removing grit, and the sewage flows through the coarse and fine grid 11 and the advection grit chamber 12 in sequence, so that the content of floating suspended pollutants in the sewage is reduced, the load of the subsequent treatment process is reduced, and the safe and stable operation of the subsequent process is ensured.
In this embodiment, as shown in fig. 1, the recycling system of sewage and sludge in a hydropower station barrage further includes a dosing assembly 4, where the dosing assembly 4 is used to add chemical agents such as polyaluminium chloride PAC and polyacrylamide PAM into an inclined plate sedimentation tank 31, so as to make organic pollutants in water mix, flocculate and precipitate quickly, and then filter by a quartz filter 32 to remove a large amount of suspended matters and total phosphorus.
In this embodiment, as shown in fig. 1, the dosing assembly 4 is also used to dose a carbon source into the anaerobic tank 21.
In this embodiment, as shown in fig. 1, when the chemical is added to the inclined plate sedimentation tank 31 and the anaerobic tank 21, the adding amount of the chemical is adjusted according to the sewage quality.
In this embodiment, as shown in fig. 1, the system for recycling sewage and sludge in a hydropower station barrage further includes a sludge recirculation structure 8, and the sludge obtained by precipitating the sewage in the inclined plate sedimentation tank 31 is transferred to the anaerobic tank 21 through the sludge recirculation structure 8, and is fully processed again by the biological processing component 2 of the integrated equipment.
In this embodiment, as shown in fig. 1, the sludge recirculation structure 8 includes a sludge recirculation line and a sludge recirculation pump connected to the sludge recirculation line.
In this embodiment, as shown in fig. 1, the system for recycling sewage and sludge in a hydropower station barrage further includes a nitrifying liquid backflow structure 7, and sewage in the aerobic tank 23 flows back into the anoxic tank 22 through the nitrifying liquid backflow structure 7, so that microorganisms in the activated sludge are fully utilized to adsorb, oxidize and decompose organic pollutants in the sewage, thereby achieving the purposes of removing organic matters and nitrogen and phosphorus, and finally forming stable substances such as carbon dioxide and water.
In this embodiment, as shown in fig. 1, the nitrifying liquid reflux structure 7 includes a nitrifying liquid reflux pipe and a nitrifying liquid reflux pump connected to the nitrifying liquid reflux pipe.
In this embodiment, as shown in fig. 1, the hydropower station barrage sewage and sludge recycling system includes a sewage pipeline and a sludge pipeline, where the pretreatment assembly 1, the anaerobic tank 21, the anoxic tank 22, the aerobic tank 23, the inclined plate sedimentation tank 31, the quartz filter 32 and the ultraviolet disinfection canal 33 are sequentially communicated through the sewage pipeline, and the aerobic tank 23, the inclined plate sedimentation tank 31 and the sludge tank 51 are communicated through the sludge pipeline.
In this embodiment, as shown in fig. 1, the pretreatment assembly 1, the integrated equipment biological treatment assembly 2, the integrated equipment advanced treatment assembly 3, the sludge preliminary concentration and dehydration assembly 5, the aerobic fermentation integrated device 6, the nitrifying liquid reflux structure 7 and the sludge reflux structure 8 are all disposed on one or more carrying units, which may be a container or a container of an adaptive box-type truck, and the carrying units are respectively used for carrying one or more of the pretreatment assembly 1, the integrated equipment biological treatment assembly 2, the integrated equipment advanced treatment assembly 3, the sludge preliminary concentration and dehydration assembly 5, the aerobic fermentation integrated device 6, the nitrifying liquid reflux structure 7 and the sludge reflux structure 8, so that when a hydropower station operating area needs to perform resource utilization on sewage, the hydropower station operating area sewage resource utilization system in this embodiment can be rapidly deployed to a target hydropower station through a transport means.
Further, in this embodiment, as shown in fig. 1, the biochar may be obtained by carbonizing, crushing and sieving branches and trunks in the floating material in front of the reservoir dam, so as to further improve the resource utilization rate and more meet the requirement of environmental protection.
In order to solve the above problems, as shown in fig. 2, the present invention further provides a hydropower station barrage sewage recycling method, and the hydropower station barrage sewage sludge recycling system includes:
the sewage of the hydropower station barrage is connected into the pretreatment component 1 to intercept larger solid matters in suspension or floating state in the sewage;
the sewage treated by the pretreatment component 1 is discharged into the biological treatment component 2 of the integrated equipment, and sequentially passes through an anaerobic tank 21 for releasing phosphorus, an anoxic tank 22 for carrying out denitrification reaction and an aerobic tank 23 for carrying out nitrification reaction to remove biochemical oxygen demand;
discharging the sewage treated by the integrated equipment biological treatment assembly 2 into an integrated equipment advanced treatment assembly 3, and sequentially passing through an inclined plate sedimentation tank 31 for realizing rapid sedimentation by flocculation sedimentation, a quartz filter 32 for further removing suspended and colloidal particles in water and an ultraviolet disinfection channel 33 for sterilization and disinfection to obtain reclaimed water which can be recycled;
the sludge obtained by the aerobic tank 23 and the inclined plate sedimentation tank 31 is discharged into a sludge primary concentration and dehydration assembly 5, sequentially passes through the sludge tank 51 and a concentration and dehydration integrated machine, and completes primary concentration and dehydration in the concentration and dehydration integrated machine;
and fermenting and composting the sludge subjected to preliminary concentration and dehydration and the biochar in the aerobic fermentation integrated device 6 together, so as to obtain the organic fertilizer which can be used as a fertilizer.
As described above, the hydropower station barrage sewage sludge recycling system and method of the invention have the following beneficial effects: the hydropower station barrage sewage recycling utilization method disclosed by the invention not only treats sewage, but also obtains reclaimed water and organic fertilizer which can meet the production of barrage life, meets the requirement of sewage recycling utilization, and simultaneously meets the requirement of environmental protection, and the hydropower station barrage sewage recycling utilization system is green and environment-friendly and has resource circulation.
Further, in the present embodiment, the advection grit chamber 12 in the pretreatment module 1 removes inorganic grit having a specific gravity of greater than 2.65 and a particle size of greater than 0.2mm from the wastewater.
In this embodiment, more specifically, the method for recycling sewage in a hydropower station barrage, as shown in fig. 2, includes:
s01: the sewage in the barrage enters a coarse and fine grid 11 to intercept larger suspended or floating solid matters in the sewage, and enters a advection grit chamber 12 to remove inorganic sand with the specific gravity of more than 2.65 and the grain diameter of more than 0.2mm in the sewage;
s02: the pretreated sewage enters a secondary biological treatment stage through a lifting pump and a pipeline system to finish biodegradation of organic matters, biological denitrification and dephosphorization, and mud-water separation of activated sludge. A carbon source is added to the front anaerobic tank 21 of the module. Simultaneously, the nitrifying liquid reflux structure 7 pumps the sewage from the aerobic tank 23 to the anoxic tank 22 through the nitrifying liquid reflux pump;
s03: the sewage after the reaction treatment enters a sewage advanced treatment stage through a lift pump and a pipeline system, chemical agents such as polyaluminium chloride PAC, polyacrylamide PAM and the like are added into an inclined plate sedimentation tank 31, so that organic pollutants in water are quickly mixed, flocculated, precipitated and filtered by a quartz filter 32, and suspended matters and total phosphorus are largely removed. The sewage is sterilized in the ultraviolet sterilizing tunnel 33. While the sludge recirculation assembly pumps the sewage from the inclined plate sedimentation tank 31 to the anoxic tank 22 via a sludge recirculation pump. The treated tail water reaching the standard can be used as greening irrigation, factory landscape water and toilet flushing water for recycling;
s04: the sewage is temporarily stored in a sludge tank 51 in a large amount of sludge generated in the reaction stage and the advanced treatment stage, the sludge is concentrated and dehydrated in a primary concentrating and dehydrating integrated machine 52, the powder of branches and trunks in the floats before the sludge mixing dam after the reduction enters an aerobic fermentation integrated device 6, the mixed sludge is composted in an aerobic fermentation device, and the product is used as an organic fertilizer for greening and fertilizing in a barrage.
In summary, in this embodiment, the hydropower station barrage sewage and sludge recycling system and method of the invention perform serial treatment on sewage and sludge through the pretreatment component 1, the integrated equipment biological treatment component 2, the integrated equipment advanced treatment component 3, the sludge preliminary concentration and dehydration component 5 and the aerobic fermentation integrated device 6, thereby obtaining reclaimed water and organic fertilizer which can meet barrage life production, and meanwhile, the hydropower station barrage sewage treatment system and method has the advantages of high integrated integration, small occupied area, reduced construction cost and solves the problems of high sewage treatment cost, environmental protection and difficult long-time sustainable operation in barrages of the medium-and-small hydropower stations in the prior art. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (11)
1. A hydropower station barrage sewage sludge recycling system for recycling sewage and sludge of a hydropower station barrage, comprising:
the pretreatment assembly (1) is used for intercepting larger solid matters in the sewage in a suspended or floating state;
the integrated equipment biological treatment assembly (2), the integrated equipment biological treatment assembly (2) is communicated with the pretreatment assembly (1) and comprises an anaerobic tank (21) for releasing phosphorus, an anoxic tank (22) for performing denitrification reaction and an aerobic tank (23) for performing nitrification reaction to remove biochemical oxygen demand, and sewage is treated by the pretreatment assembly (1) and sequentially discharged into the anaerobic tank (21), the anoxic tank (22) and the aerobic tank (23);
the integrated equipment advanced treatment assembly (3), the integrated equipment advanced treatment assembly (3) is communicated with the integrated equipment biological treatment assembly (2) and comprises an inclined plate sedimentation tank (31) for realizing rapid sedimentation through flocculation sedimentation, a quartz filter (32) for further removing suspended and colloidal particles in water and an ultraviolet disinfection canal (33) for sterilization and disinfection, wherein the sewage sequentially passes through the inclined plate sedimentation tank (31), the quartz filter (32) and the ultraviolet disinfection canal (33) to obtain reclaimed water which can be recycled;
the sludge preliminary concentration and dehydration assembly (5), the sludge preliminary concentration and dehydration assembly (5) is communicated with the advanced treatment assembly (3) of the integrated equipment, and comprises a sludge tank (51) for collecting and storing sludge and a sludge concentration and dehydration integrated machine (52) for carrying out preliminary concentration and dehydration on the sludge, wherein the sludge obtained by the aerobic tank (23) and the inclined plate sedimentation tank (31) is sequentially discharged into the sludge tank (51) and the concentration and dehydration integrated machine, and the preliminary concentration and dehydration are finished in the concentration and dehydration integrated machine;
and the aerobic fermentation integrated device (6), the aerobic fermentation integrated device (6) and the sludge preliminary concentration and dehydration assembly (5) are used for completing the preliminary concentration and dehydration of sludge and the biological carbon fermentation composting in the aerobic fermentation integrated device (6) so as to obtain the organic fertilizer which can be used as a fertilizer.
2. The hydropower station barrage sewage sludge recycling system according to claim 1, wherein: the pretreatment component (1) comprises a coarse and fine grating (11) and a advection sand basin (12) for removing sand, and sewage sequentially flows through the coarse and fine grating (11) and the advection sand basin (12), so that the content of floating suspended pollutants in the sewage is reduced.
3. The hydropower station barrage sewage sludge recycling system according to claim 1, wherein: the hydropower station barrage sewage sludge recycling system further comprises a dosing assembly (4), wherein the dosing assembly (4) is used for adding chemical agents such as polyaluminium chloride (PAC) and Polyacrylamide (PAM) into an inclined plate sedimentation tank (31), so that organic pollutants in water are quickly mixed, flocculated, precipitated and filtered by a quartz filter (32), and suspended matters and total phosphorus are largely removed.
4. The hydropower station barrage sewage sludge recycling system according to claim 3, wherein: the dosing assembly (4) is also used for dosing a carbon source into the anaerobic tank (21).
5. The hydropower station barrage sewage sludge recycling system according to claim 4, wherein: when the dosing assembly (4) is used for dosing the medicament towards the inclined plate sedimentation tank (31) and the anaerobic tank (21), the dosing amount of the medicament is adjusted according to the sewage quality.
6. The hydropower station barrage sewage sludge recycling system according to claim 1, wherein: the hydropower station barrage sewage and sludge recycling system further comprises a sludge backflow structure (8), and sludge obtained by sedimentation of the sewage flowing through the inclined plate sedimentation tank (31) is transmitted to the anaerobic tank (21) through the sludge backflow structure (8) and is fully treated by the integrated equipment biological treatment assembly (2) again.
7. The hydropower station barrage sewage sludge recycling system according to claim 6, wherein: the sludge return structure (8) comprises a sludge return pipeline and a sludge return pump connected with the sludge return pipeline.
8. The hydropower station barrage sewage sludge recycling system according to claim 1, wherein: the hydropower station barrage sewage sludge recycling system further comprises a nitrifying liquid backflow structure (7), sewage in the aerobic tank (23) flows back into the anoxic tank (22) through the nitrifying liquid backflow structure (7), so that microorganisms in the activated sludge are fully utilized to adsorb, oxidize and decompose organic pollutants in the sewage, the purposes of removing organic matters, denitrifying and dephosphorizing are achieved, and finally stable matters such as carbon dioxide, water and the like are formed.
9. The hydropower station barrage sewage sludge recycling system according to claim 8, wherein: the nitrifying liquid reflux structure (7) comprises a nitrifying liquid reflux pipeline and a nitrifying liquid reflux pump connected with the nitrifying liquid reflux pipeline.
10. The hydropower station barrage sewage sludge recycling system according to claim 1, wherein: the hydropower station barrage sewage and sludge recycling system comprises a sewage pipeline and a sludge pipeline, wherein the pretreatment assembly (1), the anaerobic tank (21), the anoxic tank (22), the aerobic tank (23), the inclined plate sedimentation tank (31), the quartz filter (32) and the ultraviolet disinfection canal (33) are communicated through the sewage pipeline in sequence, and the aerobic tank (23), the inclined plate sedimentation tank (31) and the sludge tank (51) are communicated through the sludge pipeline.
11. A hydropower station barrage sewage recycling method, utilizing the hydropower station barrage sewage sludge recycling system of any one of the above claims 1 to 10, characterized by comprising:
the sewage of the hydropower station barrage is connected into a pretreatment component (1) to intercept larger solid matters in a suspended or floating state in the sewage;
the sewage treated by the pretreatment component (1) is discharged into an integrated equipment biological treatment component (2), and sequentially passes through an anaerobic tank (21) for releasing phosphorus, an anoxic tank (22) for carrying out denitrification reaction and an aerobic tank (23) for carrying out nitration reaction to remove biochemical oxygen demand;
discharging the sewage treated by the integrated equipment biological treatment assembly (2) into an integrated equipment advanced treatment assembly (3), and sequentially passing through an inclined plate sedimentation tank (31) for realizing rapid sedimentation by flocculation sedimentation, a quartz filter (32) for further removing suspended and colloidal particles in water and an ultraviolet disinfection canal (33) for sterilization and disinfection to obtain reclaimed water which can be recycled;
the sludge obtained by the aerobic tank (23) and the inclined plate sedimentation tank (31) is discharged into a sludge preliminary concentration and dehydration assembly (5), sequentially passes through the sludge tank (51) and the concentration and dehydration integrated machine, and completes preliminary concentration and dehydration in the concentration and dehydration integrated machine;
and fermenting and composting the sludge subjected to preliminary concentration and dehydration and biochar in the aerobic fermentation integrated device (6) together, so as to obtain the organic fertilizer which can be used as a fertilizer.
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