CN113800726A - Method for treating landfill leachate and concentrated solution - Google Patents
Method for treating landfill leachate and concentrated solution Download PDFInfo
- Publication number
- CN113800726A CN113800726A CN202111252151.2A CN202111252151A CN113800726A CN 113800726 A CN113800726 A CN 113800726A CN 202111252151 A CN202111252151 A CN 202111252151A CN 113800726 A CN113800726 A CN 113800726A
- Authority
- CN
- China
- Prior art keywords
- ozone
- micro
- landfill leachate
- membrane distillation
- nano
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 51
- 239000000149 chemical water pollutant Substances 0.000 title claims abstract description 35
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 60
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 55
- 230000003647 oxidation Effects 0.000 claims abstract description 54
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 49
- 239000012528 membrane Substances 0.000 claims abstract description 45
- 238000005516 engineering process Methods 0.000 claims abstract description 40
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 38
- 238000004821 distillation Methods 0.000 claims abstract description 36
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 30
- 238000000855 fermentation Methods 0.000 claims abstract description 25
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 22
- 239000011574 phosphorus Substances 0.000 claims abstract description 22
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 19
- 239000010865 sewage Substances 0.000 claims abstract description 17
- 239000002101 nanobubble Substances 0.000 claims abstract description 15
- 238000004064 recycling Methods 0.000 claims abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 37
- 239000007789 gas Substances 0.000 claims description 13
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 12
- 230000000813 microbial effect Effects 0.000 claims description 9
- 239000010813 municipal solid waste Substances 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 6
- 230000004151 fermentation Effects 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000002957 persistent organic pollutant Substances 0.000 claims description 6
- 239000010802 sludge Substances 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 5
- 239000011148 porous material Substances 0.000 claims description 5
- 238000011897 real-time detection Methods 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 230000002209 hydrophobic effect Effects 0.000 claims description 4
- 239000012982 microporous membrane Substances 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 238000000354 decomposition reaction Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 230000014759 maintenance of location Effects 0.000 claims description 3
- 239000006228 supernatant Substances 0.000 claims description 3
- 239000013043 chemical agent Substances 0.000 claims description 2
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000000926 separation method Methods 0.000 abstract description 2
- 230000002085 persistent effect Effects 0.000 abstract 1
- 230000001651 autotrophic effect Effects 0.000 description 4
- 239000002351 wastewater Substances 0.000 description 4
- 238000005457 optimization Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- PDNNQADNLPRFPG-UHFFFAOYSA-N N.[O] Chemical compound N.[O] PDNNQADNLPRFPG-UHFFFAOYSA-N 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000001728 nano-filtration Methods 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Images
Classifications
-
- 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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/08—Thin film evaporation
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
-
- 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
-
- 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
- C02F2101/30—Organic 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
- C02F3/28—Anaerobic digestion processes
-
- 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
-
- 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
- C02F3/308—Biological phosphorus removal
Landscapes
- 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)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention provides a method for realizing advanced treatment and recycling of landfill leachate by a membrane distillation technology, an advanced oxidation technology and a combined process of a short-cut nitrification-anaerobic ammonia oxidation technology, which comprises the following steps: a membrane distillation system, an anaerobic fermentation system, an advanced oxidation system of micro-nano ozone bubbles, a shortcut nitrification-anaerobic ammonia oxidation system and an A/O nitrogen and phosphorus removal system. The invention utilizes membrane technology to realize the separation and concentration of the landfill leachate solution; the concentrated landfill leachate is pretreated by a micro-nano bubble ozone advanced oxidation technology, persistent organic matters which are difficult to degrade are removed, and the biodegradability of sewage is improved; nitrogen in the sewage is removed through short-cut nitrification-anaerobic ammonia oxidation reaction, and deep nitrogen and phosphorus removal of the landfill leachate and the concentrated solution is realized through an A/O (anoxic/oxic) process. The invention has the advantages of high efficiency, low energy consumption and easy operation management.
Description
Technical Field
The invention relates to a method for treating landfill leachate and concentrated solution by combining short-cut nitrification-anaerobic ammonia oxidation membrane distillation and advanced oxidation, aims to realize standard discharge and comprehensive utilization of the landfill leachate, and belongs to the field of sewage treatment.
Background
In recent years, with the increasing production of municipal solid waste, landfill has become the most widely used treatment and disposal method in the world. Landfill leachate generated by landfill has the water quality characteristics of complex components, large change of water quality and water quantity, high concentration of organic matters and ammonia nitrogen, imbalance of proportion of microbial nutrient elements and the like, and if the landfill leachate is directly discharged into the environment without proper treatment, soil, surface water and underground water environment in peripheral areas can be seriously damaged. The mainstream technology of 'deep treatment' of landfill leachate in China is a membrane treatment method, including nanofiltration and reverse osmosis. However, the membrane treatment method cannot completely degrade the percolate, and the refractory organic pollutants in the percolate are trapped into the concentrated solution through the membrane separation and membrane washing processes. At present, no effective solution is found for the treatment of concentrated solutions except for recharging to landfill sites. In the process of treating the landfill leachate and the concentrated solution, the purpose of realizing deep nitrogen and phosphorus removal cannot be met by a single physical and chemical or biological treatment technology.
The short-cut nitrification-anaerobic ammonia oxidation technology can efficiently treat the wastewater with unbalanced C/N ratio at low carbon. The short-cut nitrification-anaerobic ammonia oxidation autotrophic denitrification process firstly utilizes short-cut nitrification to treat high ammonia nitrogen wastewater so as to convert part of ammonia nitrogen into NO2 -N, and further provides a reaction substrate for the anaerobic ammonia oxidation technology, the technology can effectively overcome the defects of the traditional biological denitrification technology, organic matters are not required to be added, the oxygen energy consumption and the excess sludge yield are reduced, and the greenhouse gas (CO) emission can be reduced2And N2O)。
In view of comprehensive consideration of treatment cost and treatment efficiency, the method for treating the landfill leachate and the concentrated solution by using the short-cut nitrification-anaerobic ammonia oxidation autotrophic biological denitrification process combined membrane technology and the advanced oxidation technology has certain advantages. In the process, the purpose of sewage concentration is realized by a membrane distillation technology. The advanced oxidation technology based on micro-nano ozone bubbles is utilized to treat the organic pollutants which are difficult to degrade in the landfill leachate and the concentrated solution thereof, and the biochemical performance of the sewage can be improved. Aiming at the middle-aged and old landfill leachate with high ammonia nitrogen, by controlling DO, adding a microbial carrier or artificially constructing microbial particles, ecological environments with different DO concentrations are realized in one reactor, so that the integrated operation of shortcut nitrification and anaerobic ammonia oxidation is realized. Residual nitrogen in the effluent of the shortcut nitrification-anaerobic ammonia oxidation is further removed by an A/O process, and the aim of deep nitrogen and phosphorus removal is fulfilled by discharging part of phosphorus-rich sludge in the A/O process. The effective treatment and resource utilization of the landfill leachate and the concentrated solution can be realized by combining a membrane distillation technology and an advanced oxidation technology by a shortcut nitrification-anaerobic ammonia oxidation autotrophic biological denitrification process.
Disclosure of Invention
The invention relates to a method for treating garbage by a combined membrane distillation technology of shortcut nitrification-anaerobic ammonia oxidation and an advanced oxidation treatment technology
Leachate and concentrate methods. In particular to the purpose of realizing sewage concentration by a membrane distillation technology after the landfill leachate is pretreated. And then the concentrated solution is subjected to micro-nano ozone advanced oxidation technology to complete the removal of refractory organic pollutants, the biochemical performance of sewage is improved, ammonia nitrogen in the wastewater containing ammonia nitrogen is removed through a shortcut nitrification-anaerobic ammonia-oxygen process, meanwhile, the residual nitrogen is further removed through an A/O process, and the aim of biological phosphorus removal is fulfilled by discharging part of phosphorus-rich sludge in the A/O process.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention provides a method for realizing advanced treatment and resource utilization of landfill leachate by a membrane distillation technology, an advanced oxidation technology and a combined process of a short-cut nitrification-anaerobic ammonia oxidation technology, which comprises the following steps: a membrane distillation system, an anaerobic fermentation system, an advanced oxidation system of micro-nano ozone bubbles, a shortcut nitrification-anaerobic ammonia oxidation system and an A/O nitrogen and phosphorus removal system.
According to the invention, the membrane distillation system comprises a first sewage pump, a membrane distillation heating pool, a membrane distillation reactor, a condenser and a clean water pool which are connected in sequence; the membrane distillation reactor, the condenser and the clean water tank are sequentially connected through pipelines to form a circulation loop.
Preferably, the anaerobic fermentation system comprises an anaerobic fermentation tank, and a series of parameter measuring and analyzing devices are arranged in the fermentation tank to control the anaerobic fermentation process.
According to the optimization of the invention, the advanced oxidation system of the micro-nano ozone bubbles comprises a micro-nano bubble machine ozone generator, an ozone absorption and decomposition device, a water inlet pipe and a water outlet pipe. The water inlet pipe and the water outlet pipe are provided with liquid flow meters, and then the inflow speed and the inflow amount of water are detected.
Preferably, the shortcut nitrification-anaerobic ammonia oxidation system comprises a shortcut nitrification-anaerobic ammonia oxidation reactor, a gas flow meter, a pH/DO real-time detection device, an air compressor and the like.
Preferably, according to the present invention, the a/O system includes an air compressor, a pH/DO real-time detecting device, a gas flow meter, and the like.
The system device is utilized to realize the advanced treatment and resource utilization of the landfill leachate and the concentrated solution. The method comprises the following process steps:
(1) the pretreated landfill leachate enters a membrane distillation reactor, and the membrane distillation technology takes the steam pressure difference on two sides of a hydrophobic microporous membrane as a driving force to enable steam molecules on the hot side to pass through membrane pores and then condense and enrich on the cold side, so that the purpose of concentrating the landfill leachate is achieved. The supernatant can be discharged after reaching the standard in the concentration process.
(2) And the concentrated solution enters an anaerobic fermentation tank for anaerobic fermentation reaction.
(3) The method utilizes the micro-nano ozone bubble-based advanced oxidation technology to treat the organic pollutants which are difficult to degrade in the landfill leachate and the concentrated solution thereof, and improves the biochemical performance of the sewage. The micro-nano ozone bubble device constructs a micro-nano bubble ozone advanced oxidation garbage leachate treatment system by combining ozone and a micro-nano bubble generator, ozone gas is converted into micro-nano small bubbles, the specific surface area of ozone bubbles is increased, the contact area of gas and water is increased, the retention time of ozone in water is prolonged, and the removal effect of ozone on pollutants is improved.
(4) Aiming at the middle-aged and old landfill leachate with high ammonia nitrogen, by controlling DO, adding a microbial carrier or artificially constructing microbial particles, ecological environments with different DO concentrations are realized in one reactor, so that the effect of integrated operation of shortcut nitrification and anaerobic ammonia oxidation is realized. Residual nitrogen in the effluent of the shortcut nitrification-anaerobic ammonia oxidation is further removed by an A/O process, and the aim of biological phosphorus removal is achieved by discharging part of phosphorus-rich sludge in the A/O process. And residual phosphorus can be further removed by adding a chemical agent, so that the nitrogen and phosphorus in the sewage can be discharged after reaching the standard.
Preferably, in step (1), the temperature of the landfill leachate in the heating pond in the membrane distillation system is controlled to be 65-75 ℃.
Preferably, in step (2), the anaerobic fermentation is carried out at a temperature of 37-38 ℃ and a pH of 7-7.5.
According to the preferable selection of the invention, in the step (3), the pore diameter of the micro-nano bubble ozone generating device is 0.1-2.0 mm.
Preferably, in step (4), the temperature of the shortcut nitrification-anaerobic ammonia oxidation reactor DO is controlled to be 0.2-1.0mg/L and 37-38 ℃.
Preferably, in step (5), the DO level in the A/O system reactor is controlled to be 1.0-1.5 mg/L.
The invention has the following technical characteristics and advantages:
1. the invention combines the membrane treatment technology and the distillation technology to form the membrane distillation technology, and uses the steam pressure difference at two sides of the hydrophobic microporous membrane as the driving force to ensure that steam molecules at the hot side pass through membrane pores and then are condensed and enriched at the cold side, thereby realizing the purpose of sewage concentration. The membrane distillation technology has the advantages of simple equipment, convenient operation, normal pressure operation, lower temperature than the traditional distillation process and the like.
2. According to the invention, the micro-nano ozone advanced oxidation landfill leachate treatment system is constructed by combining ozone and the micro-nano bubble generator, ozone gas is converted into micro-nano-scale small bubbles, the specific surface area of ozone bubbles is greatly increased, the contact area of air and water is increased, meanwhile, the residence time of the micro bubbles in water is prolonged, the mass transfer efficiency between ozone and water is improved, the ozone efficiency and the water treatment effect are improved, the problem of poor mass transfer effect in the traditional bubbling aeration is solved, the practicability is high, and the working effect is good. In addition, the micro-nano bubbles have the characteristics of simple and convenient operation, low power consumption, no secondary pollution and the like, and have good popularization.
3. The invention adopts the shortcut nitrification-anaerobic ammonia oxidation autotrophic denitrification process to replace the traditional biological denitrification technology, efficiently treats high-concentration ammonia nitrogen wastewater such as garbage leachate and the like, realizes the efficient removal of ammonia nitrogen and total nitrogen, greatly improves the total nitrogen removal rate of the system, and has the advantages of investment and operation cost saving, high nitrogen load, good denitrification efficiency and the like. .
Drawings
FIG. 1 is a process flow diagram of the present invention;
Detailed Description
The embodiments of the present invention will be described in detail below with reference to the drawings and examples, but the scope of the present invention is not limited thereto.
The invention provides a method for realizing advanced treatment and resource utilization of landfill leachate by a membrane distillation technology, an advanced oxidation technology and a combined process of a short-cut nitrification-anaerobic ammonia oxidation technology, which comprises the following steps: a membrane distillation system, an anaerobic fermentation system, an advanced oxidation system of micro-nano ozone bubbles, a shortcut nitrification-anaerobic ammonia oxidation system and an A/O nitrogen and phosphorus removal system.
According to the invention, the membrane distillation system comprises a first sewage pump, a membrane distillation heating pool, a membrane distillation reactor, a condenser and a clean water pool which are connected in sequence; the membrane distillation reactor, the condenser and the clean water tank are sequentially connected through pipelines to form a circulation loop.
Preferably, the anaerobic fermentation system comprises an anaerobic fermentation tank, and a series of parameter measuring and analyzing devices are arranged in the fermentation tank to control the anaerobic fermentation process.
According to the optimization of the invention, the advanced oxidation system of the micro-nano ozone bubbles comprises a micro-nano bubble machine ozone generator, an ozone absorption and decomposition device, a water inlet pipe and a water outlet pipe. The water inlet pipe and the water outlet pipe are provided with liquid flow meters, and then the inflow speed and the inflow amount of water are detected.
According to the invention, the shortcut nitrification-anaerobic ammonia oxidation system comprises a shortcut nitrification-anaerobic ammonia oxidation reactor, a gas flow meter, a pH/DO real-time detection device and an air compressor.
Preferably, the A/O system comprises an air compressor, a gas flowmeter and a pH/DO real-time detection device.
The method comprises the following specific steps:
(1) the pretreated landfill leachate enters a membrane distillation reactor, and the membrane distillation technology takes the steam pressure difference on two sides of a hydrophobic microporous membrane as a driving force to enable steam molecules on the hot side to pass through membrane pores and then condense and enrich on the cold side, so that the purpose of concentrating the landfill leachate is achieved. The supernatant can be discharged after reaching the standard in the concentration process. The temperature of the landfill leachate in the heating tank is controlled at 65 ℃.
(2) And the concentrated solution enters an anaerobic fermentation tank for anaerobic fermentation reaction, and the anaerobic fermentation is carried out under the conditions that the temperature is 37 ℃ and the pH value is 7.5.
(3) The advanced oxidation technology based on micro-nano ozone bubbles is utilized to treat the organic pollutants which are difficult to degrade in the garbage leachate concentrated solution, and the biochemical performance of the sewage is improved. The micro-nano ozone bubble device constructs a micro-nano bubble ozone advanced oxidation garbage leachate treatment system by combining ozone and a micro-nano bubble generator, converts ozone gas into micro-nano small bubbles, increases the specific surface area of ozone bubbles, increases the contact area of gas and water, prolongs the retention time of ozone in water, and improves the mass transfer efficiency between ozone and water. The aperture of the micro-nano bubble ozone generating device is 0.2 mm.
(4) Aiming at the middle-aged and old landfill leachate with high ammonia nitrogen, by controlling DO, adding a microbial carrier or artificially constructing microbial particles, ecological environments with different DO concentrations are realized in one reactor, so that the effect of integrated operation of shortcut nitrification and anaerobic ammonia oxidation is realized. Residual nitrogen in the effluent of the shortcut nitrification-anaerobic ammonia oxidation is further removed by an A/O process, and the aim of biological phosphorus removal is achieved by discharging part of phosphorus-rich sludge in the A/O process. The remaining phosphorus may also be further removed by adding chemicals. Ensuring that nitrogen and phosphorus in the sewage reach the standard and are discharged. DO is controlled at 0.2-1.0mg/L and the temperature is 37-38 ℃.
After the treatment, the COD concentration of the leachate is 90mg/L, the ammonia nitrogen concentration is 20mg/L, and the TP is 2.8 mg/L.
Claims (9)
1. A method for realizing advanced treatment and recycling of landfill leachate by a membrane distillation technology, an advanced oxidation technology and a combined process of a short-cut nitrification-anaerobic ammonia oxidation technology comprises the following steps: a membrane distillation system, an anaerobic fermentation system, an advanced oxidation system of micro-nano ozone bubbles, a shortcut nitrification-anaerobic ammonia oxidation system and an A/O nitrogen and phosphorus removal system. The method is characterized by comprising the following steps:
(1) the pretreated landfill leachate enters a membrane distillation reactor, and the reactor takes the steam pressure difference on two sides of a hydrophobic microporous membrane as a driving force to enable steam molecules on the hot side to pass through membrane pores and then condense and enrich on the cold side, so that the purpose of concentrating the landfill leachate is achieved. The supernatant can be discharged after reaching the standard in the concentration process.
(2) And the concentrated solution enters an anaerobic fermentation tank for anaerobic fermentation reaction.
(3) The advanced oxidation technology based on micro-nano ozone bubbles is utilized to treat organic pollutants which are difficult to degrade in the landfill leachate and the concentrated solution thereof, and the biochemical performance of the sewage is improved. The micro-nano ozone bubble device constructs a micro-nano bubble ozone advanced oxidation garbage leachate treatment system by combining ozone and a micro-nano bubble generator, converts ozone gas into micro-nano small bubbles, increases the specific surface area of ozone bubbles, increases the contact area of gas and water, prolongs the retention time of ozone in water, and improves the mass transfer efficiency between ozone and water.
(4) Aiming at the middle-aged and old landfill leachate with high ammonia nitrogen, by controlling DO, adding a microbial carrier or artificially constructing microbial particles, ecological environments with different DO concentrations are realized in one reactor, so that the effect of integrated operation of shortcut nitrification and anaerobic ammonia oxidation is realized. Residual nitrogen in the effluent of the shortcut nitrification-anaerobic ammonia oxidation is further removed by an A/O process, and the aim of biological phosphorus removal is achieved by discharging part of phosphorus-rich sludge in the A/O process. And residual phosphorus can be further removed by adding a chemical agent, so that the nitrogen and phosphorus in the sewage can be discharged after reaching the standard.
2. The membrane distillation system according to claim 1, comprising a first sewage pump, a membrane distillation heating tank, a membrane distillation reactor, a condenser and a clean water tank which are connected in sequence; the membrane distillation reactor, the condenser and the clean water tank are sequentially connected through pipelines to form a circulation loop.
3. The process of claim 1, wherein in step (1), the temperature of the percolate from the heating tank is controlled to 65-75 ℃ in the membrane distillation system.
4. The method of claim 1, wherein in step (2), the anaerobic fermentation system comprises an anaerobic fermentation tank, and a series of parameter measuring and analyzing devices are arranged in the fermentation tank to control the anaerobic fermentation process; anaerobic fermentation is carried out at 37-38 deg.C and pH 7-7.5.
5. The method according to claim 1, wherein the advanced oxidation system of the micro-nano ozone bubbles in the step (3) comprises a micro-nano bubble machine ozone generator, an ozone absorption decomposition device, a water inlet pipe and a water outlet pipe. The water inlet pipe and the water outlet pipe are provided with liquid flow meters so as to detect the inflow speed and the inflow amount of water; the aperture of the micro-nano bubble ozone generating device is 0.1-2.0 mm.
6. The method of claim 1, wherein the shortcut nitrification-anammox system comprises a shortcut nitrification-anammox reactor, a gas flow meter, a pH/DO real-time detection device and an air compressor.
7. The method according to claim 1, wherein in the step (4), the shortcut nitrification-anaerobic ammoxidation reactor is characterized in that DO is controlled at 0.2-1.0mg/L and the temperature is 37-38 ℃.
8. The method of claim 1, wherein in step (4), the A/O system comprises an air compressor, a gas flow meter, and a pH/DO real-time detection device.
9. The method of claim 1, wherein in step (4), the DO level of the A/O system reactor is controlled to be 1.0-1.5 mg/L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111252151.2A CN113800726A (en) | 2021-10-27 | 2021-10-27 | Method for treating landfill leachate and concentrated solution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111252151.2A CN113800726A (en) | 2021-10-27 | 2021-10-27 | Method for treating landfill leachate and concentrated solution |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113800726A true CN113800726A (en) | 2021-12-17 |
Family
ID=78938039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111252151.2A Pending CN113800726A (en) | 2021-10-27 | 2021-10-27 | Method for treating landfill leachate and concentrated solution |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113800726A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115974298A (en) * | 2022-11-15 | 2023-04-18 | 上海交通大学重庆研究院 | Nitrogen-carbon salt matter full-flow treatment system for landfill leachate emergency concentrated solution |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009214007A (en) * | 2008-03-10 | 2009-09-24 | Ihi Corp | Activated sludge treating method for wastewater and activated sludge treatment apparatus |
| CN105776775A (en) * | 2016-05-12 | 2016-07-20 | 武汉理工大学 | Anaerobic-autotrophic nitrogen removal-ozone oxidation coupling landfill leachate whole flow process zero emission processing process |
| CN107098531A (en) * | 2017-06-07 | 2017-08-29 | 中国市政工程中南设计研究总院有限公司 | A kind of high-efficiency refuse percolate treating process |
| CN112209560A (en) * | 2019-07-11 | 2021-01-12 | 中国科学院城市环境研究所 | Combined process treatment method of landfill leachate |
-
2021
- 2021-10-27 CN CN202111252151.2A patent/CN113800726A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009214007A (en) * | 2008-03-10 | 2009-09-24 | Ihi Corp | Activated sludge treating method for wastewater and activated sludge treatment apparatus |
| CN105776775A (en) * | 2016-05-12 | 2016-07-20 | 武汉理工大学 | Anaerobic-autotrophic nitrogen removal-ozone oxidation coupling landfill leachate whole flow process zero emission processing process |
| CN107098531A (en) * | 2017-06-07 | 2017-08-29 | 中国市政工程中南设计研究总院有限公司 | A kind of high-efficiency refuse percolate treating process |
| CN112209560A (en) * | 2019-07-11 | 2021-01-12 | 中国科学院城市环境研究所 | Combined process treatment method of landfill leachate |
Non-Patent Citations (1)
| Title |
|---|
| 汪家权: "《生态强省 美好安徽》", 31 July 2013, 合肥工业大学出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115974298A (en) * | 2022-11-15 | 2023-04-18 | 上海交通大学重庆研究院 | Nitrogen-carbon salt matter full-flow treatment system for landfill leachate emergency concentrated solution |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103641272B (en) | High concentrated organic wastewater and percolate zero-discharge treatment system | |
| CN109721156B (en) | Device and method for treating late landfill leachate through integration of intermittent aeration/short-range denitrification-anaerobic ammonia oxidation | |
| CN101209881A (en) | Method and system for processing leachate of garbage burning factory | |
| CN104591473B (en) | Advanced nitrogen and phosphorus removal technology | |
| CN107311308B (en) | Process for synchronously removing and enriching phosphorus by biomembrane method | |
| CN105923765B (en) | A kind of quick start method of anaerobic ammonia oxidation reactor | |
| CN104649510A (en) | Method for treating sewage generated from process for producing caprolactam by utilizing cyclohexanone | |
| CN110395851B (en) | High-altitude town sewage treatment method based on nitrogen and phosphorus capture and completely autotrophic nitrogen removal | |
| CN101386445A (en) | Water pump-driving baffling internal circulation bioreactor and use method thereof | |
| Zhao et al. | Ecological floating bed for decontamination of eutrophic water bodies: Using alum sludge ceramsite | |
| CN113233596A (en) | Method for treating middle and late landfill leachate by continuous flow shortcut nitrification/endogenous shortcut denitrification/anaerobic ammonia oxidation integrated process | |
| CN211141811U (en) | Landfill leachate's positive osmotic treatment system | |
| CN107954515A (en) | The combination unit and its operation method of a kind of sewage purification, Treatment of Sludge and energy recovery | |
| CN105198168B (en) | A2/O-MBR-biological contact oxidation pond dual-sludge high-efficiency denitrifying phosphorus removal device and method | |
| CN113800726A (en) | Method for treating landfill leachate and concentrated solution | |
| CN107473382A (en) | By controlling dissolved oxygen to realize sewage carbon nitrogen while the bioremediation removed | |
| CN207418548U (en) | A kind of sewage recycling processing unit | |
| CN114590973B (en) | System and method for performing high-efficiency denitrification, carbon removal and phosphorus recovery on source separation fresh urine through biochemical combination | |
| CN115259377A (en) | Garbage leachate treatment system and method | |
| CN115028267A (en) | Waste water recycling device | |
| CN114853271A (en) | Landfill leachate wastewater treatment system and treatment method | |
| CN113321306A (en) | Biochemical advanced treatment method for domestic waste leachate | |
| CN106587484A (en) | Reaction system for removal of nitrogen and phosphorus in domestic sewage by use of microalgae | |
| Gao et al. | Co-treatment of mixed municipal sewage and landfill leachates via the hydrolytic acidification–sequencing batch reactors–membrane bioreactor process | |
| CN217757021U (en) | Waste water recycling device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211217 |