CN110563261A - landfill leachate biological treatment method - Google Patents
landfill leachate biological treatment method Download PDFInfo
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- CN110563261A CN110563261A CN201910848249.0A CN201910848249A CN110563261A CN 110563261 A CN110563261 A CN 110563261A CN 201910848249 A CN201910848249 A CN 201910848249A CN 110563261 A CN110563261 A CN 110563261A
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- landfill leachate
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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
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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
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
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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
- C02F2001/007—Processes including a sedimentation step
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
- C02F2101/166—Nitrites
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
- C02F3/2846—Anaerobic digestion processes using upflow anaerobic sludge blanket [UASB] reactors
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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)
- Physical Water Treatments (AREA)
Abstract
the application relates to a landfill leachate biochemical treatment method in the technical field of garbage treatment, which comprises the following steps of S1, conveying the landfill leachate to an adjusting tank for pretreatment, performing preliminary sedimentation separation in the adjusting tank, and then adjusting the water quantity and the water quality; s2, conveying the pretreated landfill leachate from the bottom to an upflow anaerobic sludge bed reactor for biochemical treatment; s3, conveying the liquid after biochemical treatment to an efficient ammonia nitrogen stripping tower for ammonia nitrogen stripping; and S4, conveying the liquid subjected to the stripping treatment to an inclined tube sedimentation tank, and performing sludge-water separation on the liquid by using an inclined tube filler. The anaerobic ammonia oxidation process is innovatively adopted, ammonia nitrogen or nitrite nitrogen is directly oxidized into nitrogen to be completely removed from a water body, a carbon source does not need to be added in the anaerobic ammonia oxidation process, the operation is simple, the occupied area is small, the removal efficiency is high, the removal rate of the ammonia nitrogen is more than 98%, and the emission concentration of the ammonia nitrogen is lower than the limit value specified by the national standard.
Description
Technical Field
the invention relates to the technical field of garbage treatment, in particular to a landfill leachate biochemical treatment method.
Background
The landfill leachate is associated secondary pollutants of a landfill site and mainly comes from rainfall and internal water of the garbage. The properties of the percolate can be influenced by a plurality of physical factors, chemical factors, biological factors and the like in the flowing process of the liquid, such as: the influence of the property of the garbage component, the structure of the landfill, the landfill method, the age of the landfill, rainfall and rainwater runoff, the landfill time, the landfill mode and the surface condition of the landfill; the properties of the percolate vary within a relatively large range. The landfill leachate has complex components, high pollutant concentration, large chromaticity and strong toxicity, contains a large amount of organic pollutants and various heavy metal pollutants, and is high-concentration organic wastewater with complex components. If the landfill leachate is improperly treated, the quality of surface water is affected, the safety of underground water is also endangered, and if the landfill leachate is directly discharged into the environment without being treated, serious environmental pollution is caused. According to the requirements of the domestic garbage landfill pollution control Standard (GB16889-2008), the limit value of total nitrogen is 40mg/L, and the limit value of ammonia nitrogen is 25 mg/L. Therefore, the denitrification treatment of the leachate is imperative and has practical guiding significance.
the existing physical treatment of denitrification comprises an air stripping method, an adsorption method and a precipitation method, but the air stripping method can cause air pollution, the problem of membrane regeneration of the adsorption method is difficult to solve, and the precipitation method is high in cost, so microorganisms have the advantages of rapid growth, good removal effect, high efficiency, low cost, simple post treatment and the like by removing ammonia nitrogen, wherein the microorganisms mainly take nitrification-denitrification as main components, the nitrification-denitrification means that under the action of various microorganisms, carbon dioxide, nitrogen and water are finally generated through denitrification, nitrification and a series of reactions, the nitrification reaction is to oxidize the ammonia nitrogen in the wastewater into nitrate or nitrite by utilizing the action of aerobic nitrifying bacteria under the aerobic condition, when oxygen does not exist, the residual nitrite and nitrate are reduced into nitrogen by utilizing denitrifying bacteria, but the denitrification process needs an organic substrate (carbon source), the infrastructure cost is high, and acid production in the nitration process needs additional alkali to be added for neutralization, which causes secondary pollution and additional cost.
therefore, there is a need in the art to provide a novel biochemical treatment method which does not require the addition of a carbon source and is simple to operate.
Disclosure of Invention
the invention provides a landfill leachate biochemical treatment method, which aims to solve the problems that a biochemical treatment device relying on nitrification-denitrification in the prior art is complex in denitrification operation and needs to be additionally added with a carbon source.
The invention provides a landfill leachate biochemical treatment method, including the following steps, S1, convey landfill leachate to adjust pool preconditioning, in adjust pool preliminary sedimentation separate, then carry on the regulation of water yield, water quality;
S2, conveying the pretreated landfill leachate from the bottom to an upflow anaerobic sludge bed reactor for biochemical treatment, wherein the upflow anaerobic sludge bed reactor is sequentially provided with a water distribution area, a sludge bed reaction area, a filler area and a three-phase separation area from bottom to top, anaerobic ammonia oxidizing bacteria are inoculated in the sludge bed reaction area, bamboo charcoal, polyurethane foam filler and non-woven fabric are arranged in the filler area from bottom to top, and liquid after biochemical treatment flows out from the top;
S3, adjusting the pH value of the liquid after biochemical treatment to 11, and conveying the liquid into a high-efficiency ammonia nitrogen stripping tower for ammonia nitrogen stripping;
and S4, conveying the liquid subjected to the stripping treatment to an inclined tube sedimentation tank, and performing sludge-water separation on the liquid by using an inclined tube filler.
The working principle of the invention is as follows: firstly, garbage leachate is put into a regulating tank, after preliminary sedimentation, separation, water quality regulation and water quantity regulation, the garbage leachate enters an upflow anaerobic sludge bed reactor which sequentially comprises a water distribution area, a sludge bed reaction area, a filler area and a three-phase separation area from bottom to top, liquid enters the sludge bed reaction area after being distributed with water through the water distribution area and reacts with anaerobic ammonium oxidation bacteria in sludge, and the anaerobic ammonium oxidation bacteria adopt NO under anaerobic conditions2As electron acceptors, by reacting NH4 +direct oxidation to nitrogen (N)2) In addition, when liquid flows upwards from the bottom, the liquid passes through the filler area, liquid can continuously flow out of the reactor due to the fact that percolate or circulating water continuously enters the reactor, part of anammox bacteria can be carried in the process that the liquid flows upwards, and the anammox bacteria are blocked layer by the bamboo charcoal, the biochemical filler and the non-woven fabric, so that cultured anaerobe bacteria are not prone to being degradedthe loss rate of the oxygen ammonia oxidizing bacteria is greatly reduced, and because the anaerobic ammonia oxidizing bacteria are multiplied and slowly enriched, the biochemical treatment efficiency is higher, the liquid after the biochemical treatment is conveyed into a high-efficiency ammonia nitrogen stripping tower for ammonia nitrogen stripping after the pH value is adjusted to 11, the rest of the ammonia nitrogen which is not removed is removed by adopting a physical stripping method, the liquid after the stripping enters a bottom inclined tube sedimentation tank again, inclined tube packing is utilized to divide the liquid into a series of shallow layer sedimentation layers, the treated and settled sludge moves and is separated in each settling shallow layer, finally the sludge enters a sludge bucket in the inclined tube sedimentation tank for sedimentation, the sludge flows out through a sludge discharge pipe after a period of time, the water after the sludge is settled enters an overflow weir and flows out from the overflow weir, and the whole biochemical treatment process is finished.
Has the advantages that: according to the invention, an anaerobic ammonia oxidation process is innovatively adopted, ammonia nitrogen or nitrite nitrogen is directly oxidized into nitrogen and is completely removed from a water body, a carbon source is not required to be added in the anaerobic ammonia oxidation process, the operation is simple, the occupied area is small, the removal efficiency is high, then a high-efficiency stripping tower is added to remove the residual ammonia nitrogen, and the residual ammonia nitrogen enters an inclined tube sedimentation tank for mud-water separation, so that the removal rate of the ammonia nitrogen is more than 98%, and the emission concentration of the ammonia nitrogen is lower than the limit value specified by the national standard.
Further, the temperature in the upflow anaerobic sludge blanket reactor is 32 +/-1 ℃. In order to ensure the highest activity of anaerobic ammonia nitrogen oxidizing bacteria, the temperature in the reactor is kept at the temperature value which is most suitable for the metabolism of the bacteria, and the anaerobic ammonia nitrogen oxidizing bacteria can be heated by a constant-temperature water bath or by an electric heating wire.
Further, the high-efficiency ammonia nitrogen stripping tower is composed of at least four stages of stripping towers. The ammonia nitrogen enters the top of the high-efficiency stripping tower by adopting first-level lifting, a four-level stripping unit is arranged in the high-efficiency stripping tower, and the ammonia nitrogen concentration in the liquid is gradually reduced by stripping.
furthermore, the inclined tube filler is woven by polymer synthetic carbon fibers with microporous surfaces. So that the impurities are not easy to gush out along with the clear water, and simultaneously the synthetic carbon fiber has the function of microbial degradation, can improve the sewage treatment effect,
Detailed Description
The following is further detailed by way of specific embodiments:
Example 1: a landfill leachate biochemical treatment method comprises the following steps of S1, conveying landfill leachate to an adjusting tank for pretreatment, performing primary sedimentation separation in the adjusting tank, and then adjusting water quantity and water quality;
S2, conveying the pretreated landfill leachate from the bottom to an upflow anaerobic sludge blanket reactor for biochemical treatment, wherein the upflow anaerobic sludge blanket reactor is sequentially provided with a water distribution area, a sludge blanket reaction area, a filler area and a three-phase separation area from bottom to top, the upflow anaerobic sludge blanket reactor heats and preserves the temperature of the sludge blanket reaction area by introducing heat exchange fluid into a shell of the reactor by utilizing the water bath heating principle, so that the temperature of the sludge blanket reaction area is controlled to be 31 ℃, anaerobic ammonia oxidizing bacteria are inoculated in the sludge blanket reaction area and come from laboratory granular sludge, and microbial flora in the granular sludge is analyzed by fluorescence in-situ hybridization, so that the content of the anaerobic ammonia oxidizing bacteria in the granular sludge accounts for more than 80% of the total bacteria content; the pretreated landfill leachate is contacted with anaerobic ammonia oxidation bacteria in a sludge bed reaction zone to perform anaerobic ammonia oxidation reaction, and then sequentially passes through bamboo charcoal, polyurethane foam packing and non-woven fabric in a packing zone, so that anaerobic ammonia oxidation reaction can be further performed, and in the process that anaerobic ammonia oxidation bacteria flow upwards along with fluid, the bamboo charcoal, polyurethane foam packing and non-woven fabric can also improve the adhesive force of the anaerobic ammonia oxidation bacteria, reduce the loss of the anaerobic ammonia oxidation bacteria and improve the nitrogen removal capability, and the liquid after biochemical treatment flows out from the top;
S3, adding alkali to adjust the pH value of the liquid after biochemical treatment to 11, and conveying the liquid into a four-stage high-efficiency ammonia nitrogen stripping tower, wherein the four-stage stripping units act in sequence to efficiently carry out ammonia nitrogen stripping;
and S4, conveying the liquid subjected to air stripping treatment to an inclined tube sedimentation tank, and weaving polymer synthetic carbon fibers with microporous surfaces to form inclined tube fillers to separate mud and water of the liquid.
example 2:
A landfill leachate biochemical treatment method comprises the following steps of S1, conveying landfill leachate to an adjusting tank for pretreatment, performing primary sedimentation separation in the adjusting tank, and then adjusting water quantity and water quality;
S2, conveying the pretreated landfill leachate from the bottom to an upflow anaerobic sludge bed reactor for biochemical treatment, wherein the upflow anaerobic sludge bed reactor is sequentially provided with a water distribution zone, a sludge bed reaction zone, a filler zone and a three-phase separation zone from bottom to top, the upflow anaerobic sludge bed reactor heats and preserves the temperature of the sludge bed reaction zone by introducing heat exchange fluid into a shell of the reactor by utilizing the water bath heating principle, so that the temperature of the sludge bed reaction zone is controlled to be 33 ℃, anaerobic ammonia oxidizing bacteria are inoculated in the sludge bed reaction zone and come from granular sludge in laboratories, and microbial flora in the granular sludge is analyzed by fluorescence in-situ hybridization, so that the content of the anaerobic ammonia oxidizing bacteria in the granular sludge accounts for more than 85% of the total bacteria content; the pretreated landfill leachate is contacted with anaerobic ammonia oxidation bacteria in a sludge bed reaction zone to perform anaerobic ammonia oxidation reaction, and then sequentially passes through bamboo charcoal, polyurethane foam packing and non-woven fabric in a packing zone, so that anaerobic ammonia oxidation reaction can be further performed, and in the process that anaerobic ammonia oxidation bacteria flow upwards along with fluid, the bamboo charcoal, polyurethane foam packing and non-woven fabric can also improve the adhesive force of the anaerobic ammonia oxidation bacteria, reduce the loss of the anaerobic ammonia oxidation bacteria and improve the nitrogen removal capability, and the liquid after biochemical treatment flows out from the top;
s3, adding alkali to adjust the pH value of the liquid after biochemical treatment to 11, and conveying the liquid into a four-stage high-efficiency ammonia nitrogen stripping tower, wherein the four-stage stripping units act in sequence to efficiently carry out ammonia nitrogen stripping;
and S4, conveying the liquid subjected to air stripping treatment to an inclined tube sedimentation tank, and weaving polymer synthetic carbon fibers with microporous surfaces to form inclined tube fillers to separate mud and water of the liquid.
Example 3:
a landfill leachate biochemical treatment method comprises the following steps of S1, conveying landfill leachate to an adjusting tank for pretreatment, performing primary sedimentation separation in the adjusting tank, and then adjusting water quantity and water quality;
s2, conveying the pretreated landfill leachate from the bottom to an upflow anaerobic sludge bed reactor for biochemical treatment, wherein the upflow anaerobic sludge bed reactor is sequentially provided with a water distribution zone, a sludge bed reaction zone, a filler zone and a three-phase separation zone from bottom to top, the upflow anaerobic sludge bed reactor heats and preserves the temperature of the sludge bed reaction zone by introducing heat exchange fluid into a shell of the reactor by utilizing the water bath heating principle, so that the temperature of the sludge bed reaction zone is controlled to be 32 ℃, anaerobic ammonia oxidizing bacteria are inoculated in the sludge bed reaction zone and come from granular sludge in laboratories, and microbial flora in the granular sludge is analyzed by fluorescence in-situ hybridization, so that the content of the anaerobic ammonia oxidizing bacteria in the granular sludge accounts for more than 90% of the total bacterial content; the pretreated landfill leachate is contacted with anaerobic ammonia oxidation bacteria in a sludge bed reaction zone to perform anaerobic ammonia oxidation reaction, and then sequentially passes through bamboo charcoal, polyurethane foam packing and non-woven fabric in a packing zone, so that anaerobic ammonia oxidation reaction can be further performed, and in the process that anaerobic ammonia oxidation bacteria flow upwards along with fluid, the bamboo charcoal, polyurethane foam packing and non-woven fabric can also improve the adhesive force of the anaerobic ammonia oxidation bacteria, reduce the loss of the anaerobic ammonia oxidation bacteria and improve the nitrogen removal capability, and the liquid after biochemical treatment flows out from the top;
s3, adding alkali to adjust the pH value of the liquid after biochemical treatment to 11, and conveying the liquid into a four-stage high-efficiency ammonia nitrogen stripping tower, wherein the four-stage stripping units act in sequence to efficiently carry out ammonia nitrogen stripping;
And S4, conveying the liquid subjected to air stripping treatment to an inclined tube sedimentation tank, and weaving polymer synthetic carbon fibers with microporous surfaces to form inclined tube fillers to separate mud and water of the liquid.
Claims (4)
1. A landfill leachate biochemical treatment method is characterized by comprising the following steps: s1, conveying the landfill leachate to a regulating reservoir for pretreatment, performing primary sedimentation separation in the regulating reservoir, and then regulating water quantity and water quality;
S2, conveying the pretreated landfill leachate from the bottom to an upflow anaerobic sludge bed reactor for biochemical treatment, wherein the upflow anaerobic sludge bed reactor is sequentially provided with a water distribution area, a sludge bed reaction area, a filler area and a three-phase separation area from bottom to top, anaerobic ammonia oxidizing bacteria are inoculated in the sludge bed reaction area, bamboo charcoal, polyurethane foam filler and non-woven fabric are arranged in the filler area from bottom to top, and liquid after biochemical treatment flows out from the top;
S3, adjusting the pH value of the liquid after biochemical treatment to 11, and conveying the liquid into a high-efficiency ammonia nitrogen stripping tower for ammonia nitrogen stripping;
and S4, conveying the liquid subjected to the stripping treatment to an inclined tube sedimentation tank, and performing sludge-water separation on the liquid by using an inclined tube filler.
2. The method for biologically treating the landfill leachate according to claim 1, wherein the method comprises the following steps: the temperature in the upflow anaerobic sludge blanket reactor is 32 +/-1 ℃.
3. The method for biologically treating the landfill leachate according to claim 2, wherein the method comprises the following steps: the high-efficiency ammonia nitrogen stripping tower is composed of at least 4 stages of stripping towers.
4. the method for biologically treating the landfill leachate according to claim 2, wherein the method comprises the following steps: the inclined tube filler is woven by polymer synthetic carbon fibers with microporous surfaces.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112794583A (en) * | 2021-01-30 | 2021-05-14 | 浙江自贸区一谦环保技术工作室 | Method for treating landfill leachate by using rhodobacter |
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| US20110011800A1 (en) * | 2008-01-04 | 2011-01-20 | Murdoch University | Biological nitrogen removal |
| CN202658046U (en) * | 2012-06-01 | 2013-01-09 | 赵义武 | Landfill leachate treating system |
| CN204779031U (en) * | 2015-05-31 | 2015-11-18 | 中国城市建设研究院有限公司 | Landfill leachate's in later period high -efficient nitrogen rejection facility is handled to UASB - anaerobic ammonium oxidation granular sludge composite Biological membrane |
| US20160207810A1 (en) * | 2015-01-15 | 2016-07-21 | Leaderman & Associates Co., Ltd. | Fluidized bed reactor for ammonia laden wastewater and method for treating ammonia laden wastewater |
| CN205699622U (en) * | 2016-04-29 | 2016-11-23 | 新兴铸管股份有限公司 | Vertical sedimentation basin |
| CN107140732A (en) * | 2017-07-06 | 2017-09-08 | 龙岩学院 | A kind of upflow anaerobic sludge blanket reactor and method of wastewater treatment |
| WO2017194997A1 (en) * | 2016-05-12 | 2017-11-16 | Babak Rezania | Methods and apparatus for nutrient and water recovery from waste streams |
| CN208716943U (en) * | 2018-04-09 | 2019-04-09 | 华南理工大学 | A kind of reaction unit of fast enriching anaerobic ammonia oxidizing bacteria |
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2019
- 2019-09-09 CN CN201910848249.0A patent/CN110563261A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110011800A1 (en) * | 2008-01-04 | 2011-01-20 | Murdoch University | Biological nitrogen removal |
| CN202658046U (en) * | 2012-06-01 | 2013-01-09 | 赵义武 | Landfill leachate treating system |
| US20160207810A1 (en) * | 2015-01-15 | 2016-07-21 | Leaderman & Associates Co., Ltd. | Fluidized bed reactor for ammonia laden wastewater and method for treating ammonia laden wastewater |
| CN204779031U (en) * | 2015-05-31 | 2015-11-18 | 中国城市建设研究院有限公司 | Landfill leachate's in later period high -efficient nitrogen rejection facility is handled to UASB - anaerobic ammonium oxidation granular sludge composite Biological membrane |
| CN205699622U (en) * | 2016-04-29 | 2016-11-23 | 新兴铸管股份有限公司 | Vertical sedimentation basin |
| WO2017194997A1 (en) * | 2016-05-12 | 2017-11-16 | Babak Rezania | Methods and apparatus for nutrient and water recovery from waste streams |
| CN107140732A (en) * | 2017-07-06 | 2017-09-08 | 龙岩学院 | A kind of upflow anaerobic sludge blanket reactor and method of wastewater treatment |
| CN208716943U (en) * | 2018-04-09 | 2019-04-09 | 华南理工大学 | A kind of reaction unit of fast enriching anaerobic ammonia oxidizing bacteria |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112794583A (en) * | 2021-01-30 | 2021-05-14 | 浙江自贸区一谦环保技术工作室 | Method for treating landfill leachate by using rhodobacter |
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