CN115353254A - Carbon emission reduction process and device for leachate treatment system - Google Patents
Carbon emission reduction process and device for leachate treatment system Download PDFInfo
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- CN115353254A CN115353254A CN202210904648.6A CN202210904648A CN115353254A CN 115353254 A CN115353254 A CN 115353254A CN 202210904648 A CN202210904648 A CN 202210904648A CN 115353254 A CN115353254 A CN 115353254A
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 50
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 50
- 238000011946 reduction process Methods 0.000 title claims abstract description 13
- 239000012528 membrane Substances 0.000 claims abstract description 20
- 230000009615 deamination Effects 0.000 claims abstract description 17
- 238000006481 deamination reaction Methods 0.000 claims abstract description 17
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000002699 waste material Substances 0.000 claims abstract description 8
- 238000001914 filtration Methods 0.000 claims abstract description 5
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 238000005273 aeration Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- QJZYHAIUNVAGQP-UHFFFAOYSA-N 3-nitrobicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid Chemical compound C1C2C=CC1C(C(=O)O)C2(C(O)=O)[N+]([O-])=O QJZYHAIUNVAGQP-UHFFFAOYSA-N 0.000 claims description 6
- 238000005265 energy consumption Methods 0.000 claims description 6
- 239000004021 humic acid Substances 0.000 claims description 6
- 238000001728 nano-filtration Methods 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 229910019142 PO4 Inorganic materials 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 239000010452 phosphate Substances 0.000 claims description 3
- 239000000725 suspension Substances 0.000 claims description 3
- 238000000108 ultra-filtration Methods 0.000 claims description 3
- 238000004064 recycling Methods 0.000 claims description 2
- 238000004891 communication Methods 0.000 claims 1
- 238000004134 energy conservation Methods 0.000 claims 1
- 238000005188 flotation Methods 0.000 abstract description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 5
- 238000011084 recovery Methods 0.000 abstract description 2
- 239000002351 wastewater Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 239000010865 sewage Substances 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/24—Treatment of water, waste water, or sewage by flotation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/442—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a carbon emission reduction process and a carbon emission reduction device for a leachate treatment system. The device is including air supporting, equalizing basin, deamination system, collecting pit, equalizing basin, one-level denitrification pond, one-level nitrification tank, second grade denitrification pond, second grade nitrification tank, super filtering pond, receive filtering pond, second grade decrement membrane that communicate in proper order, and discharge port, softening tank are connected respectively to second grade decrement membrane, and the softening tank communicates with one-level denitrification tank again. The leachate firstly enters an air flotation tank, is sequentially treated by an adjusting tank, a deamination system, a secondary reduction membrane and the like, part of effluent reaches the standard and is discharged through a discharge port, and the concentrated solution is treated by a softening tank and then is discharged into a primary denitrification tank. The effluent quality of the invention is stable, can meet the current discharge standard, and has high recovery rate and ammonia nitrogen removal rate; the steam used by the deamination system comes from heat generated by anaerobic treatment of methane, so that the resource can be recycled; the added carbon source adopts leachate of an incineration plant, so that the operation cost can be saved, the leachate can be treated, the waste is treated by the waste, and the carbon emission is reduced.
Description
Technical Field
The invention relates to a carbon emission reduction process and a carbon emission reduction device for a leachate treatment system, and belongs to the field of wastewater treatment.
Background
With the emission of a large amount of carbon dioxide, the greenhouse effect is accumulated continuously, the temperature is increased, and global warming is caused, which not only harms the balance of a natural ecological system, but also influences the health of human beings, and even threatens the survival of human beings.
Carbon emissions from wastewater treatment include indirect and direct emissions. The power consumption of the sewage treatment industry accounts for about 1 percent of the total power consumption of the whole society, and a large amount of indirect carbon is discharged due to high energy consumption. The sewage treatment process generates and dissipates large amounts of CH4 and N2O, which are important direct carbon emissions sources. In general, the carbon emission in the sewage treatment industry accounts for 1-2% of the total emission of the whole society. The leachate generated by the refuse landfill has high concentration of pollutants such as COD, ammonia nitrogen, total nitrogen and the like, deep chromaticity, large taste, serious imbalance of C/N ratio and huge amount of external carbon source, thereby not only increasing huge operating cost, but also greatly increasing carbon emission, and therefore, carbon emission reduction of the leachate of the refuse landfill is an important link for carbon emission reduction in sewage treatment.
Disclosure of Invention
The invention aims to solve the problems that: provides a carbon emission reduction process and a device of a leachate treatment system, and aims to realize carbon emission reduction in the leachate treatment process of a refuse landfill.
In order to solve the problems, the technical scheme of the invention is as follows:
the utility model provides a leachate treatment system carbon emission reduction device, its air supporting, equalizing basin, one-level denitrification pond, one-level nitrification tank, second grade denitrification tank, second grade nitrification tank, super filtering pond, receive filtering pond, second grade decrement membrane that communicate in proper order, second grade decrement membrane is connected discharge port, softening tank respectively, and the softening tank communicates with one-level denitrification tank again.
Preferably, an aeration system is arranged in each of the primary nitrification tank and the secondary nitrification tank. The aeration system can improve the utilization rate of oxygen by 20-30%, has the effects of saving energy and reducing consumption, and reduces carbon emission.
More preferably, the aeration system comprises an ejector arranged in the primary nitrification tank or the secondary nitrification tank, and the ejector is connected with the magnetic suspension blower and the ejector pump.
Preferably, submersible stirrers are arranged in the regulating tank, the collecting tank, the equalizing tank, the primary denitrification tank and the secondary denitrification tank; a stirrer is arranged in the softening tank.
The invention also provides a carbon emission reduction process of the leachate treatment system, by adopting the carbon emission reduction device of the leachate treatment system, the leachate firstly enters air floatation, PAC and PAM are respectively added in the air floatation to remove ss and phosphate radicals in the leachate, so that pipeline blockage is avoided, the energy consumption of equipment is reduced, the aim of carbon emission reduction is indirectly fulfilled, the effluent of the air floatation can overflow into an adjusting tank, the lifting of a water pump is avoided, and the energy consumption is reduced;
the leachate is treated by a regulating tank and then sequentially treated by a deamination system, a collection tank, a balance tank, a primary denitrification tank, a primary nitrification tank, a secondary denitrification tank, a secondary nitrification tank, a super filter, a nano filter and a secondary reduction membrane;
the deamination system is used for reducing the ammonia nitrogen concentration in the percolate so as to improve the C/N ratio, reduce the amount of an external carbon source and reduce the dissolved oxygen required by the nitrification tank, thereby achieving the purposes of saving energy, reducing consumption and reducing carbon emission;
the primary denitrification tank and the secondary denitrification tank are externally added with carbon sources and adopt percolate of an incineration plant, so that the operation cost is saved, the percolate can be treated, the waste is treated by the waste, and the carbon emission is reduced;
part of effluent after the secondary decrement membrane treatment reaches the standard and is discharged through a discharge port, and the other part of concentrated solution is discharged into a primary denitrification tank after being treated by a softening tank; one part of humic acid generated by a first-stage decrement film in the second-stage decrement films is transported to an incineration plant for incineration;
NaOH and PAM are added into the softening tank.
Preferably, the adding amount of the PAC is 10% of the mass of the leachate, and the adding amount of the PAM is 1.5% of the mass of the leachate.
Preferably, the ammonia nitrogen concentration in the leachate is reduced to below 400mg/L from 2000-3000 mg/L by the ammonia nitrogen system.
Preferably, the steam required by the deamination system is derived from heat generated by anaerobic treatment of biogas, so that resource recycling is realized.
Preferably, the mass concentration ratio of the carbon source adding amount in the first-stage denitrification tank to the second-stage denitrification tank is C: n =5 to 10.
Preferably, 5% of humic acid generated by the first-stage decrement film in the second-stage decrement film is transported to a burning plant for burning.
Compared with the prior art, the invention has the beneficial effects that:
1. the effluent quality is stable, the existing discharge standard can be met, and the recovery rate can reach more than 95 percent;
2. the invention is provided with a deamination system, and the ammonia nitrogen removal rate can reach more than 75 percent;
3. the steam used by the deamination system comes from heat generated by anaerobic treatment of methane, so that the resource can be recycled;
4. the added carbon source adopts leachate of an incineration plant, so that the operation cost can be saved, the leachate can be treated, the waste is treated by the waste, and the carbon emission is reduced.
Drawings
Fig. 1 is a schematic diagram of a carbon emission reduction device of a leachate treatment system provided by the invention.
Detailed Description
In order to make the invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.
Examples
As shown in fig. 1, the carbon emission reduction device for a leachate treatment system provided by the invention comprises an air flotation 1, an adjusting tank 2, a deamination system 3, a collection tank 4, a balance tank 5, a primary denitrification tank 6, a primary nitrification tank 7, a secondary denitrification tank 8, a secondary nitrification tank 9, an ultrafiltration tank 10, a nanofiltration tank 11 and a secondary decrement membrane 15 which are sequentially communicated, wherein the secondary decrement membrane 15 is respectively connected with a discharge port 17 and a softening tank 16, and the softening tank 16 is further communicated with the primary denitrification tank 6.
Aeration systems are arranged in the first-stage nitrification tank 7 and the second-stage nitrification tank 9. The aeration system comprises an ejector 13 arranged in the primary nitrification tank 7 or the secondary nitrification tank 9, and the ejector 13 is connected with a magnetic suspension air blower 12 and an ejector pump 14.
Submersible mixers are arranged in the regulating tank 2, the collecting tank 4, the equalizing tank 5, the primary denitrification tank 6 and the secondary denitrification tank 8; a stirrer is arranged in the softening tank 16.
A carbon emission reduction process of a leachate treatment system comprises the following specific steps:
the method comprises the steps that leachate of a certain landfill is lifted to an air flotation through a lifting pump, PAM and PAC are added into the air flotation to remove SS and phosphate radicals in the leachate, the air flotation is installed on an adjusting tank, effluent of the air flotation overflows into the adjusting tank, wastewater in the adjusting tank is lifted into a deamination system through the lifting pump, the ammonia nitrogen concentration in the wastewater is reduced in the deamination system, steam in an incineration plant is required to be introduced into the deamination system, effluent of the deamination system enters a subsequent collecting tank, the wastewater in the collecting tank is lifted into a balancing tank through the lifting pump, the wastewater is lifted into a primary denitrification tank through the lifting pump after the water quality and water quantity are balanced, the primary denitrification tank is required to be added into the leachate of the incineration plant to enable C/N = 5-10, the wastewater sequentially passes through a primary denitrification tank, a primary nitrification tank, a secondary denitrification tank and a secondary nitrification tank, stirrers are arranged in the primary denitrification tank and the secondary denitrification tank, the primary nitrification tank and the secondary nitrification tank are provided with aeration systems, and the wastewater in the secondary nitrification tank is lifted into an ultrafiltration system, and then is discharged to reach the standard after nanofiltration treatment. The nanofiltration concentrated solution is treated by a first-level decrement membrane, the water produced by the first-level decrement membrane enters a second-level decrement membrane, the first-level decrement membrane is concentrated and enters a humic acid pool, the humic acid pool is lifted to an incineration plant by a lift pump for incineration, the water produced by the second-level decrement membrane reaches the standard and is discharged, the second-level decrement membrane concentrated solution is softened and then enters a first-level denitrification pool, and NaOH and PAM are added in the softening process.
Claims (10)
1. The utility model provides a leachate treatment system carbon emission reduction device, a serial communication port, including air supporting (1), equalizing basin (2), deamination system (3), collecting pit (4), equalizing basin (5), one-level denitrification pond (6), one-level nitrification pond (7), second grade denitrification pond (8), second grade nitrification pond (9), super filtering pond (10), nanofiltration pond (11), second grade decrement membrane (15) that communicate in proper order, discharge port (17) are connected respectively in second grade decrement membrane (15), soften pond (16) and one-level denitrification pond (6) intercommunication again.
2. The carbon emission reduction device of the leachate treatment system of claim 1, wherein aeration systems are disposed in the primary nitrification tank (7) and the secondary nitrification tank (9).
3. The carbon emission reduction device of the leachate treatment system as claimed in claim 2, wherein the aeration system comprises an ejector (13) arranged in the primary nitrification tank (7) or the secondary nitrification tank (9), and the ejector (13) is connected with the magnetic suspension blower (12) and the jet pump (14).
4. The leachate treatment system carbon emission reduction device as set forth in claim 1, wherein submersible mixers are arranged in the adjusting tank (2), the collecting tank (4), the equalizing tank (5), the primary denitrification tank (6) and the secondary denitrification tank (8); a stirrer is arranged in the softening tank (16).
5. A carbon emission reduction process of a leachate treatment system is characterized in that the carbon emission reduction device of the leachate treatment system is adopted, a leachate (A) enters an air floatation (1) firstly, PAC and PAM are added into the air floatation (1) respectively, ss and phosphate radicals in the leachate are removed, pipeline blockage is avoided, equipment energy consumption is reduced, the carbon emission reduction purpose is indirectly achieved, water discharged from the air floatation (1) can overflow into an adjusting tank (2), water pump lifting is avoided, and energy consumption is reduced;
the leachate is treated by a regulating tank (2) and then sequentially treated by a deamination system (3), a collection tank (4), a balance tank (5), a primary denitrification tank (6), a primary nitrification tank (7), a secondary denitrification tank (8), a secondary nitrification tank (9), an ultrafiltration tank (10), a nanofiltration tank (11) and a secondary reduction membrane (15);
the deamination system (3) is used for reducing the ammonia nitrogen concentration in the percolate (A), so that the C/N ratio is improved, the amount of an external carbon source is reduced, the dissolved oxygen required by the nitrification tank is reduced, the energy conservation and consumption reduction are achieved, and the carbon emission is reduced;
the primary denitrification tank (6) and the secondary denitrification tank (8) are externally added with carbon sources and adopt leachate of an incineration plant, so that the operation cost is saved, the leachate can be treated, the waste is treated by the waste, and the carbon emission is reduced;
part of the effluent treated by the secondary decrement film (15) is discharged through a discharge port (17) after reaching the standard, and the other part of the concentrated solution is discharged into a primary denitrification tank (6) after being treated by a softening tank (16); one part of humic acid generated by the first-stage decrement film in the second-stage decrement film (15) is transported to an incineration plant for incineration;
NaOH and PAM are added into the softening tank (16).
6. The carbon emission reduction process for leachate treatment system of claim 5, wherein the amount of PAC added is 10% of the mass of leachate (A) and the amount of PAM added is 1.5% of the mass of leachate (A).
7. The carbon emission reduction process for the leachate treatment system of claim 5, wherein the ammonia nitrogen concentration in the leachate (A) is reduced from 2000-3000 mg/L to below 400mg/L by the ammonia nitrogen removal system (3).
8. The carbon emission reduction process for the leachate treatment system of claim 5, wherein the steam required by the deamination system (3) is derived from heat generated by anaerobic treatment of biogas, thereby realizing resource recycling.
9. The carbon emission reduction process for the leachate treatment system of claim 5, wherein the mass concentration ratio of the carbon source addition in the primary denitrification tank (6) and the secondary denitrification tank (8) is C: n =5 to 10.
10. The carbon emission reduction process for leachate treatment system of claim 5, wherein 5% of humic acid produced by the first stage abatement membrane of the second stage abatement membrane (15) is transported to an incineration plant for incineration.
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| CN202210904648.6A CN115353254A (en) | 2022-07-29 | 2022-07-29 | Carbon emission reduction process and device for leachate treatment system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118063025A (en) * | 2024-02-05 | 2024-05-24 | 江南大学 | Energy and full-quantification treatment method for high-salt high-nitrogen hydrothermal carbonized liquid |
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Application publication date: 20221118 |
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