CN110054353B - Garbage incineration power generation leachate treatment system - Google Patents
Garbage incineration power generation leachate treatment system Download PDFInfo
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- CN110054353B CN110054353B CN201910309809.5A CN201910309809A CN110054353B CN 110054353 B CN110054353 B CN 110054353B CN 201910309809 A CN201910309809 A CN 201910309809A CN 110054353 B CN110054353 B CN 110054353B
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
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- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The invention belongs to the technical field of wastewater treatment, and particularly relates to a garbage incineration power generation leachate treatment system which comprises a calcium and magnesium ion removal subsystem, wherein the calcium and magnesium ion removal subsystem at least comprises a calcium ion removal tank and a magnesium ion removal tank, an active filter material I for removing calcium ions is arranged in the calcium ion removal tank, an active filter material II for removing magnesium ions is arranged in the magnesium ion removal tank, and the calcium ion removal tank is communicated with the magnesium ion removal tank. The invention has the beneficial effects that: the treated garbage incineration power generation leachate can reduce the scaling phenomenon of a pipeline and reduce the chromaticity and COD, ammonia nitrogen, phosphorus, calcium, magnesium metal and other ionic pollutants; anaerobic property, oxygen deficiency and aeration are adopted to effectively change the biodegradability of the wastewater, so that favorable conditions are created for the subsequent biochemical activities of microorganisms; the stepped biological contact oxidation tank adopts aerobic sludge inoculation culture of a garbage incineration leachate treatment plant, can realize quick start and can achieve the treatment effect without aeration.
Description
Technical Field
The invention belongs to the technical field of wastewater treatment, and particularly relates to a garbage incineration power generation leachate treatment system.
Background
The components of the refuse incineration leachate are complex. The percolate contains low componentsFatty acids with molecular weight, carbohydrates with humic macromolecules, fulvic acids with medium molecular weight and heavy metal substances. Although the concentration of a particular contaminant in the leachate is low, the total amount of contaminant is large due to its wide variety. Organic contaminants and NH4 + high-N content: landfill leachate was identified to contain 93 organic compounds, 22 of which are blacklisted by EPA environmental priority pollutants in china and the united states.
Heavy metal content is big, and the colourity is high and the foul, and the leachate contains multiple heavy metal ion, and the elution volume of heavy metal ion will often be higher when industrial waste and domestic waste bury.
At present, monitoring of various sewage treatment plants shows that heavy metal ions in the leachate generated by waste incineration power generation are mainly calcium ions and magnesium ions, and although the calcium ions and the magnesium ions are essential elements for human growth, the high-concentration calcium ions and magnesium ions bring some disadvantages to production and life. For example, the high-calcium magnesium-calcium ion containing effluent can cause scaling in the pipeline to block the pipeline when the effluent is recycled, and in addition, the high-calcium magnesium ion containing refuse incineration power generation leachate can inhibit microorganisms in the activated sludge to influence the effluent quality.
Disclosure of Invention
In order to solve the above problems, an object of the present invention is to provide a leachate treatment system for waste incineration power generation, which can efficiently treat leachate from waste incineration power generation and improve biodegradability thereof.
The invention provides the following technical scheme:
the utility model provides a waste incineration power generation leachate processing system, gets rid of the subsystem including calcium magnesium ion, calcium magnesium ion gets rid of the subsystem and includes a calcium ion at least and gets rid of pond and a magnesium ion and get rid of the pond, calcium ion gets rid of and is equipped with the active filter material one that is used for getting rid of calcium ion in the pond, magnesium ion gets rid of and is equipped with the active filter material two that is used for getting rid of magnesium ion in the pond, calcium ion gets rid of the pond and gets rid of the pond with magnesium ion and be linked together.
Preferably, the preparation method of the first active filter material comprises the following steps:
s1, uniformly mixing quartz sand with the particle size of 1.2mm and hydrochloric acid solution with the mass concentration of 8% according to the mass ratio of 1:0.8, stirring for 40 hours, filtering, taking out a filter cake, and drying to obtain a product A1;
s2, washing the product A1 for 2 times by using a sodium hydroxide solution with the mass concentration of 1% -3%, each time for 5min, uniformly mixing the washed product A1 with a sodium hydroxide solution with the mass concentration of 10% according to the mass ratio of 1:1.2, stirring for 40h, filtering, taking out and drying a filter cake, calcining for 2h at 400 ℃, and cooling to 30 ℃ to obtain a product B1;
s3, uniformly mixing the product B1 with a calcium sulfate solution with the mass concentration of 18% according to the mass ratio of 1:1.8, stirring and soaking for 2 hours, adding a sodium hydroxide solution with the mass concentration of 10% and aerating carbon dioxide, controlling the pH to be 9, stirring and reacting for 1 hour at 20 ℃, filtering, and taking out a filter cake to obtain a product C1;
and S4, washing for 1 time and 5min each time by using a sodium hydroxide solution with the mass concentration of 1-3%, washing for 4 times and 3min each time by using distilled water, washing away the calcium sulfate solution and the sodium hydroxide solution which are remained on the surface of the product C1, and drying to obtain the active filter material I.
Preferably, the preparation method of the second active filter material comprises the following steps:
s1, uniformly mixing quartz sand with the particle size of 1.4mm and a hydrochloric acid solution with the mass concentration of 12% according to the mass ratio of 1.5:1, stirring for 48 hours, filtering, taking out a filter cake, and drying to obtain a product A2;
s2, washing the product A2 for 3 times by using a sodium hydroxide solution with the mass concentration of 2%, each time for 4min, uniformly mixing the washed product A2 with a sodium hydroxide solution with the mass concentration of 12% according to the mass ratio of 1:1.2, stirring for 48h, filtering, taking out and drying a filter cake, calcining for 4h at 400 ℃, and cooling to 25 ℃ to obtain a product B2;
s3, uniformly mixing the product B2 with a magnesium sulfate solution with the mass concentration of 11% according to the mass ratio of 1:1.4, stirring and soaking for 3 hours, adding a sodium hydroxide solution with the mass concentration of 14%, controlling the pH to be 9, stirring and reacting for 1 hour at 25 ℃, filtering, and taking out a filter cake to obtain a product C2;
and S4, washing for 2 times and 4min each time by using a sodium hydroxide solution with the mass concentration of 1% -3%, washing for 3 times and 4min each time by using distilled water, washing out the magnesium sulfate solution and the sodium hydroxide solution which are remained on the surface of the product C2, and drying to obtain an active filter material II.
Preferably, the subsystem upper reaches are got rid of to calcium magnesium ion are equipped with and are used for adjusting quality of water volume, carry out the preliminary pretreatment subsystem of straining, preliminary filtration's thick grid, fine grid are carried out including the equalizing basin of adjusting quality of water volume to the preliminary pretreatment subsystem, the pretreatment subsystem still includes the catch basin, equalizing basin, thick grid, fine grid and catch basin are linked together in proper order, be equipped with the msw incineration power generation leachate water inlet on the equalizing basin, the catch basin still gets rid of the pond with calcium ion and is linked together.
Preferably, the downstream of the calcium and magnesium ion removal subsystem is sequentially provided with a first sedimentation tank, an anaerobic tank, an anoxic tank, an aeration tank, a stepped biological contact oxidation tank, a second sedimentation tank and a membrane filter tank which are communicated with each other, and the magnesium ion removal tank is communicated with the first sedimentation tank.
Preferably, a sludge return tank is further arranged at the downstream of the calcium and magnesium ion removal subsystem, and the sludge return tank is respectively communicated with the first sedimentation tank, the anaerobic tank, the anoxic tank, the aeration tank and the sedimentation tank through pipelines.
The invention has the beneficial effects that:
the invention discloses a treatment system for efficiently treating waste incineration power generation leachate, which comprises a pretreatment subsystem, a calcium and magnesium ion removal subsystem, a first sedimentation tank, an anaerobic tank, an anoxic tank, an aeration tank, a stepped biological contact oxidation tank, a second sedimentation tank, a membrane filter and the like; the garbage incineration power generation leachate enters a regulating reservoir in the pretreatment subsystem, sewage in the regulating reservoir flows to a fine grid for filtration through the filtration of a coarse grid, the sewage is lifted to a calcium and magnesium ion removal subsystem, an active filter material I for removing calcium ions is arranged in a calcium ion removal reservoir, an active filter material II for removing magnesium ions is arranged in a magnesium ion removal reservoir, the leachate from which calcium and magnesium ions are removed flows into a sedimentation reservoir I for sedimentation, then flows to an anaerobic reservoir, then flows to an anoxic reservoir, is aerated in an aeration tank, then flows into a stepped good oxidation tank, is lifted to a sedimentation reservoir II by a lifting pump, and finally flows to a membrane filter tank for water discharge. Sludge in the first sedimentation tank, the second sedimentation tank, the anoxic tank and the aerobic tank is discharged into a sludge return tank, is pumped into a sludge dewatering machine by a sludge lifting pump station for dewatering, and is transported to a waste incineration plant for incineration power generation.
The treated garbage incineration power generation leachate can reduce the scaling phenomenon of a pipeline and reduce the chromaticity and COD, ammonia nitrogen, phosphorus, calcium, magnesium metal and other ionic pollutants; anaerobic treatment, anoxic treatment and aeration are adopted to effectively change the biodegradability of the wastewater, so that favorable conditions are created for the subsequent biochemical property of microorganisms; the stepped biological contact oxidation tank adopts aerobic sludge inoculation culture of a garbage incineration leachate treatment plant, can realize quick start and can achieve the treatment effect without aeration.
Drawings
FIG. 1 is a schematic structural view of a leachate treatment system for waste incineration power generation.
The designations in the drawings have the following meanings:
1-adjusting tank 2-coarse grid 3-fine grid 4-water collecting tank 5-calcium ion removing tank 6-magnesium ion removing tank 7-sedimentation tank I8-anaerobic tank 9-anoxic tank 10-aeration tank 11-step type biological contact oxidation tank 12-sedimentation tank II 13-membrane filter tank 14-sludge reflux tank
Detailed Description
The present invention will be described in detail with reference to the following examples.
As shown in fig. 1, a leachate treatment system for waste incineration power generation comprises a calcium and magnesium ion removal subsystem, wherein the calcium and magnesium ion removal subsystem at least comprises a calcium ion removal tank 5 and a magnesium ion removal tank 6, an active filter material I for removing calcium ions is arranged in the calcium ion removal tank 5, an active filter material II for removing magnesium ions is arranged in the magnesium ion removal tank 6, and the calcium ion removal tank 5 is communicated with the magnesium ion removal tank 6.
The preparation method of the active filter material I comprises the following steps:
s1, uniformly mixing quartz sand with the particle size of 1.2mm and hydrochloric acid solution with the mass concentration of 8% according to the mass ratio of 1:0.8, stirring for 40 hours, filtering, taking out a filter cake, and drying to obtain a product A1;
s2, washing the product A for 2 times by using a sodium hydroxide solution with the mass concentration of 1% -3%, each time for 5min, uniformly mixing the washed product A1 with a sodium hydroxide solution with the mass concentration of 10% according to the mass ratio of 1:1.2, stirring for 40h, filtering, taking out and drying a filter cake, calcining for 2h at 400 ℃, and cooling to 30 ℃ to obtain a product B1;
s3, uniformly mixing the product B1 with a calcium sulfate solution with the mass concentration of 18% according to the mass ratio of 1:1.8, stirring and soaking for 2 hours, adding a sodium hydroxide solution with the mass concentration of 10% and aerating carbon dioxide, controlling the pH to be 9, stirring and reacting for 1 hour at 20 ℃, filtering, and taking out a filter cake to obtain a product C1;
and S4, washing for 1 time and 5min each time by using a sodium hydroxide solution with the mass concentration of 1-3%, washing for 4 times and 3min each time by using distilled water, washing away the calcium sulfate solution and the sodium hydroxide solution which are remained on the surface of the product C1, and drying to obtain the active filter material I.
The preparation method of the active filter material II comprises the following steps:
s1, uniformly mixing quartz sand with the particle size of 1.4mm and a hydrochloric acid solution with the mass concentration of 12% according to the mass ratio of 1.5:1, stirring for 48 hours, filtering, taking out a filter cake, and drying to obtain a product A2;
s2, washing the product A2 for 3 times by using a sodium hydroxide solution with the mass concentration of 2%, each time for 4min, uniformly mixing the washed product A2 with a sodium hydroxide solution with the mass concentration of 12% according to the mass ratio of 1:1.2, stirring for 48h, filtering, taking out and drying a filter cake, calcining for 4h at 400 ℃, and cooling to 25 ℃ to obtain a product B2;
s3, uniformly mixing the product B2 with a magnesium sulfate solution with the mass concentration of 11% according to the mass ratio of 1:1.4, stirring and soaking for 3 hours, adding a sodium hydroxide solution with the mass concentration of 14%, controlling the pH to be 9, stirring and reacting for 1 hour at 25 ℃, filtering, and taking out a filter cake to obtain a product C2;
and S4, washing for 2 times and 4min each time by using a sodium hydroxide solution with the mass concentration of 1% -3%, washing for 3 times and 4min each time by using distilled water, washing out the magnesium sulfate solution and the sodium hydroxide solution which are remained on the surface of the product C2, and drying to obtain an active filter material II.
As shown in fig. 1, the subsystem upper reaches are got rid of to calcium magnesium ion is equipped with and is used for adjusting quality of water volume, carries out the preliminary pretreatment subsystem of straining, the preliminary treatment subsystem is including adjusting tank 1 of adjusting quality of water volume, carries out the thick grid 2, the thin grid 3 of straining, the pretreatment subsystem still includes catch basin 4, adjusting tank 1, thick grid 2, thin grid 3 and catch basin 4 are linked together in proper order, be equipped with msw incineration power generation leachate water inlet on the adjusting tank 4, catch basin 4 still gets rid of pond 5 with calcium ion and is linked together.
As shown in fig. 1, the downstream of the calcium and magnesium ion removal subsystem is sequentially provided with a first sedimentation tank 7, an anaerobic tank 8, an anoxic tank 9, an aeration tank 10, a stepped biological contact oxidation tank 11, a second sedimentation tank 12 and a membrane filter tank 13 which are mutually communicated, and the magnesium ion removal tank 6 is communicated with the first sedimentation tank 7.
As shown in fig. 1, a sludge return tank is further arranged at the downstream of the calcium and magnesium ion removal subsystem, and the sludge return tank 14 is respectively communicated with the first sedimentation tank 7, the anaerobic tank 8, the anoxic tank 9, the aeration tank 10 and the second sedimentation tank 12 through pipelines.
Results and detection
Respectively detecting COD, calcium ion content and magnesium ion content at the water inlet and water outlet of the power generation leachate treatment system to obtain the results shown in Table 1
TABLE 1
As can be seen from Table 1, the CDO value of the leachate treated by the treatment system is greatly reduced and reaches the standard of direct discharge; the content of magnesium ions is reduced by 90.2 percent, because the self granularity of the quartz sand is reduced after the metal impurities on the surface of the quartz sand are removed by acid cleaning, the porosity is increased, the specific surface area of the substrate is increased, and after the quartz sand is soaked and calcined by alkaline solution, Mg (OH) 2 The content of (A) is also distributed more by the diversity of the non-zeolitic pore channel structure of the silicate itselfThe addition is rich and full, the active filter material fully plays the role of magnesium ion adsorption in the landfill leachate with the help of the pore channel effect of quartz sand, and the removal rate of the filter material on magnesium ions is greatly improved; the calcium ion content is reduced by 95.7 percent, because the self granularity is reduced after the quartz sand is subjected to acid washing to remove metal impurities on the surface, the porosity is high, the specific surface area of the matrix is increased, after the quartz sand is soaked in alkaline solution and converted by carbon dioxide, the calcium carbonate content is uniformly and fully distributed due to the diversity of the non-zeolite pore channel structure of the silicate, and the adsorption performance of the active filter material is greatly improved.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. The leachate treatment system for the waste incineration power generation is characterized by comprising a calcium and magnesium ion removal subsystem, wherein the calcium and magnesium ion removal subsystem at least comprises a calcium ion removal tank (5) and a magnesium ion removal tank (6), an active filter material I for removing calcium ions is arranged in the calcium ion removal tank (5), an active filter material II for removing magnesium ions is arranged in the magnesium ion removal tank (6), and the calcium ion removal tank (5) is communicated with the magnesium ion removal tank (6);
the preparation method of the active filter material I comprises the following steps:
s1, uniformly mixing quartz sand with the particle size of 1.2mm and hydrochloric acid solution with the mass concentration of 8% according to the mass ratio of 1:0.8, stirring for 40 hours, filtering, taking out a filter cake, and drying to obtain a product A1;
s2, washing the product A1 for 2 times by using a sodium hydroxide solution with the mass concentration of 1% -3%, each time for 5min, uniformly mixing the washed product A1 with a sodium hydroxide solution with the mass concentration of 10% according to the mass ratio of 1:1.2, stirring for 40h, filtering, taking out and drying a filter cake, calcining for 2h at 400 ℃, and cooling to 30 ℃ to obtain a product B1;
s3, uniformly mixing the product B1 with a calcium sulfate solution with the mass concentration of 18% according to the mass ratio of 1:1.8, stirring and soaking for 2 hours, adding a sodium hydroxide solution with the mass concentration of 10% and aerating carbon dioxide, controlling the pH to be 9, stirring and reacting for 1 hour at 20 ℃, filtering, and taking out a filter cake to obtain a product C1;
s4, washing the filter material for 1 time and 5min each time by using a sodium hydroxide solution with the mass concentration of 1% -3%, washing the filter material for 4 times and 3min each time by using distilled water, washing away the calcium sulfate solution and the sodium hydroxide solution which are remained on the surface of the product C1, and drying to obtain an active filter material I;
the preparation method of the active filter material II comprises the following steps:
s1, uniformly mixing quartz sand with the particle size of 1.4mm and a hydrochloric acid solution with the mass concentration of 12% according to the mass ratio of 1.5:1, stirring for 48 hours, filtering, taking out a filter cake, and drying to obtain a product A2;
s2, washing the product A2 for 3 times by using a sodium hydroxide solution with the mass concentration of 2%, each time for 4min, uniformly mixing the washed product A2 with a sodium hydroxide solution with the mass concentration of 12% according to the mass ratio of 1:1.2, stirring for 48h, filtering, taking out and drying a filter cake, calcining for 4h at 400 ℃, and cooling to 25 ℃ to obtain a product B2;
s3, uniformly mixing the product B2 with a magnesium sulfate solution with the mass concentration of 11% according to the mass ratio of 1:1.4, stirring and soaking for 3 hours, adding a sodium hydroxide solution with the mass concentration of 14%, controlling the pH to be 9, stirring and reacting for 1 hour at 25 ℃, filtering, and taking out a filter cake to obtain a product C2;
and S4, washing for 2 times and 4min each time by using a sodium hydroxide solution with the mass concentration of 1% -3%, washing for 3 times and 4min each time by using distilled water, washing out the magnesium sulfate solution and the sodium hydroxide solution which are remained on the surface of the product C2, and drying to obtain an active filter material II.
2. The refuse incineration power generation leachate treatment system according to claim 1, wherein a pretreatment subsystem for adjusting the water quality and water quantity and performing primary filtration is arranged upstream of the calcium and magnesium ion removal subsystem, the pretreatment subsystem comprises an adjusting tank (1) for adjusting the water quality and water quantity, a coarse grating (2) and a fine grating (3) for performing primary filtration, the pretreatment subsystem further comprises a water collecting tank (4), the adjusting tank (1), the coarse grating (2), the fine grating (3) and the water collecting tank (4) are sequentially communicated, a refuse incineration power generation leachate water inlet is arranged on the adjusting tank (1), and the water collecting tank (4) is further communicated with the calcium ion removal tank (5).
3. The leachate treatment system for waste incineration and power generation as defined in claim 1, wherein a first sedimentation tank (7), an anaerobic tank (8), an anoxic tank (9), an aeration tank (10), a stepped biological contact oxidation tank (11), a second sedimentation tank (12) and a membrane filtration tank (13) are sequentially arranged downstream of the calcium and magnesium ion removal subsystem, and the magnesium ion removal tank is communicated with the first sedimentation tank.
4. The leachate treatment system through waste incineration and power generation as claimed in claim 3, wherein a sludge recirculation tank (14) is further disposed downstream of the calcium and magnesium ion removal subsystem, and the sludge recirculation tank (14) is respectively communicated with the first sedimentation tank (7), the anaerobic tank (8), the anoxic tank (9), the aeration tank (10) and the second sedimentation tank (12) through pipelines.
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- 2019-04-17 CN CN201910309809.5A patent/CN110054353B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101767888A (en) * | 2009-12-29 | 2010-07-07 | 郑理慎 | Wastewater recycling treatment process |
| CN101757890A (en) * | 2010-02-05 | 2010-06-30 | 淮安金雨阳环保科技有限公司 | Preparation method of attapulgite filter material for selectively absorbing calcium ions and magnesium ions |
| CN102826726A (en) * | 2012-09-25 | 2012-12-19 | 重庆三峰环境产业集团有限公司 | Refuse incineration plant leachate treatment process |
| CN203741143U (en) * | 2013-12-18 | 2014-07-30 | 厦门紫金矿冶技术有限公司 | Electrolysis pretreatment system of saliferous wastewater in mine |
| CN104163520A (en) * | 2014-06-16 | 2014-11-26 | 河海大学 | Method and device for granulation reaction by using high-hardness water |
| CN206203984U (en) * | 2016-09-26 | 2017-05-31 | 深圳市铁汉生态环境股份有限公司 | A kind of revetment staged bio-contact oxidation system |
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