CN112707593A - Synthetic ammonia wastewater treatment system and treatment method - Google Patents
Synthetic ammonia wastewater treatment system and treatment method Download PDFInfo
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- CN112707593A CN112707593A CN202011559572.5A CN202011559572A CN112707593A CN 112707593 A CN112707593 A CN 112707593A CN 202011559572 A CN202011559572 A CN 202011559572A CN 112707593 A CN112707593 A CN 112707593A
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 84
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 42
- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000002351 wastewater Substances 0.000 claims abstract description 47
- 238000004062 sedimentation Methods 0.000 claims abstract description 35
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000006243 chemical reaction Methods 0.000 claims abstract description 24
- 238000009280 upflow anaerobic sludge blanket technology Methods 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 39
- 239000010802 sludge Substances 0.000 claims description 28
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 10
- 239000003344 environmental pollutant Substances 0.000 claims description 10
- 231100000719 pollutant Toxicity 0.000 claims description 10
- 238000000926 separation method Methods 0.000 claims description 7
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 claims description 5
- 229910000360 iron(III) sulfate Inorganic materials 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000001556 precipitation Methods 0.000 claims description 2
- 238000003786 synthesis reaction Methods 0.000 claims description 2
- 230000003750 conditioning effect Effects 0.000 claims 1
- 238000005188 flotation Methods 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 10
- 238000004064 recycling Methods 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 4
- 238000011272 standard treatment Methods 0.000 abstract description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 1
- 239000001301 oxygen Substances 0.000 abstract 1
- 229910052760 oxygen Inorganic materials 0.000 abstract 1
- 238000001223 reverse osmosis Methods 0.000 description 8
- 239000012528 membrane Substances 0.000 description 7
- 239000000243 solution Substances 0.000 description 7
- 238000009292 forward osmosis Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
- 239000003513 alkali Substances 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 230000009615 deamination Effects 0.000 description 4
- 238000006481 deamination reaction Methods 0.000 description 4
- 238000006731 degradation reaction Methods 0.000 description 4
- 238000004821 distillation Methods 0.000 description 4
- 244000005700 microbiome Species 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 239000003814 drug Substances 0.000 description 3
- 238000007667 floating Methods 0.000 description 3
- 230000029219 regulation of pH Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000012267 brine Substances 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 229910001424 calcium ion Inorganic materials 0.000 description 2
- 229910001425 magnesium ion Inorganic materials 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/24—Treatment of water, waste water, or sewage by flotation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- 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
- C02F1/722—Oxidation by peroxides
-
- 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
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
-
- 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
- C02F2101/101—Sulfur compounds
-
- 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
- C02F2101/30—Organic compounds
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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
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
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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
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
- C02F2305/026—Fenton's reagent
-
- 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
Abstract
The invention provides a wastewater treatment system and a method for synthetic ammonia, wherein the wastewater treatment system comprises a pretreatment unit; the pretreatment unit is sequentially connected with a UASB reaction tank, a sedimentation tank and an anoxic/aerobic tank to realize the removal of COD, BOD and ammonia nitrogen in the wastewater. The wastewater treatment system provided by the invention is a process method for removing COD (chemical oxygen demand) and ammonia nitrogen in synthetic ammonia wastewater, and realizes standard treatment and recycling or discharge of COD, ammonia nitrogen and other indexes of the synthetic ammonia wastewater mainly through the scientific combination of biochemical technology and physicochemical technology, so that the treatment system is worthy of wide popularization and application.
Description
Technical Field
The invention relates to the field of wastewater treatment of synthetic ammonia, in particular to a system and a method for treating wastewater of synthetic ammonia.
Background
The synthetic ammonia industry is one of the basic inorganic chemical industries, and the demand of China on ammonia products is high, so that the great development of the synthetic ammonia industry is driven, but the synthetic ammonia industry is accompanied with the problem of wastewater treatment. The synthetic ammonia chemical wastewater belongs to one kind of high ammonia nitrogen wastewater, and is a large part of the field of industrial wastewater treatment, wherein the removal of ammonia nitrogen and total nitrogen in water is always a difficult problem in the field of water treatment. The synthetic ammonia wastewater is characterized by high ammonia nitrogen, and if the synthetic ammonia wastewater is directly discharged into a water body without treatment, eutrophication of the water body can be caused, and the natural state of the water body is damaged; if the ammonia nitrogen is directly discharged into a mixed sewage treatment plant, larger ammonia nitrogen impact load can be caused, so that the treatment needs to be carried out in the plant in advance, but the current treatment means is only simple for removing organic matters, and the effect of thorough treatment is not achieved.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
The first purpose of the invention is to provide a treatment system for wastewater of synthetic ammonia, which aims at a process method for removing COD and ammonia nitrogen of the wastewater of synthetic ammonia, and realizes standard treatment and recycling or discharge of indexes of COD, ammonia nitrogen and the like of the wastewater of synthetic ammonia mainly by combining biochemical technology and physicochemical technology science, so that the treatment system is worthy of wide popularization and application.
The second purpose of the invention is to provide a wastewater treatment method of the treatment system, which has the advantages of simple operation, mild operation conditions, safety and environmental protection.
In order to achieve the above purpose of the present invention, the following technical solutions are adopted:
the invention provides a wastewater treatment system for synthetic ammonia, which comprises a pretreatment unit; the pretreatment unit is connected with first UASB reactor, sedimentation tank and second UASB reactor in proper order in order to realize the desorption to sulphur, COD in the waste water.
The wastewater treatment system of the invention abandons the defect that the prior synthetic ammonia wastewater is not finely treated, realizes standard treatment and reuse or discharge of indexes such as the COD, ammonia nitrogen and the like of the synthetic ammonia wastewater by a process method for removing the COD and ammonia nitrogen of the synthetic ammonia wastewater and mainly by combining biochemical technology and physicochemical technology science, and is worthy of wide popularization and application.
Preferably, as a further implementable scheme, the pretreatment unit sequentially comprises a regulating tank, an air floatation device and a water collecting tank. The wastewater in the regulating reservoir is lifted by a lift pump to enter air floatation equipment, acid and alkali are added at an air floatation inlet to carry out pH regulation, PAC and PAM agents are added in the air floatation tank, the effluent after air floatation treatment and the wastewater after ammonia distillation tower deamination treatment are mixed to enter a water collecting tank, and the effluent is lifted by a water pump to enter subsequent treatment equipment.
Preferably, as a further implementable scheme, the anoxic/aerobic tank is connected with a secondary sedimentation tank for sludge-water separation, effluent of the secondary sedimentation tank is sent to a fenton reaction tank for removing refractory organic matters, and hydrogen peroxide and ferric sulfate are added into the fenton reaction tank. Pollutants such as COD, BOD, ammonia nitrogen and the like are degraded by the degradation action of microorganisms in the anoxic/aerobic tank, and effluent enters a secondary sedimentation tank, and sludge and water are separated and then enter a subsequent unit.
Preferably, as a further implementable scheme, the fenton reaction tank is connected with a fenton sedimentation tank for performing sludge-water separation on the effluent of the fenton reaction tank.
Preferably, as a further practicable scheme, the bottoms of the secondary sedimentation tank and the fenton sedimentation tank are provided with sludge tanks for further processing the settled sludge.
Preferably, as a further implementable solution, the sludge tank is connected with a sludge dewatering machine for dewatering the precipitated sludge.
Preferably, as a further practicable scheme, the effluent of the Fenton precipitation tank is discharged after reaching the standard after being precipitated and filtered in a clean water tank.
Finally, the clean water from the clean water tank can be subjected to advanced treatment, and the advanced treatment means can be a reverse osmosis unit or a forward osmosis unit.
The reverse osmosis unit comprises an RO water inlet tank, an RO feed pump, an RO membrane and a membrane shell sleeved outside the RO membrane, and the forward osmosis unit comprises an FO concentrated brine tank, an FO feed pump, a liquid drawing feed pump, a dilution liquid drawing storage tank, a liquid drawing recovery system, a concentrated brine air-stripping system, an FO membrane and a membrane shell sleeved outside the FO membrane.
The reverse osmosis unit can be designed into multi-stage treatment, wherein the first stage reverse osmosis concentration is used as a first concentrated solution, the last stage reverse osmosis concentration is used as a first separated solution, the separated solutions of the other stages continue to enter the next stage for reverse osmosis concentration, and the concentrated solution returns to the previous stage for reverse osmosis concentration again; preferably a 2-stage treatment.
The forward osmosis is a process that water molecules spontaneously permeate from high-salt water to a drawing liquid under the driving force of osmotic pressure difference generated on two sides of a semipermeable membrane, and a substance mainly generating a power source is the drawing liquid. These characteristics ensure that the forward osmosis unit has higher anti-pollution performance, and likewise, forward osmosis concentration can also be designed to be single-stage or multi-stage treatment, but in consideration of cost and concentration effect, the single-stage treatment can meet the requirement.
The invention provides a wastewater treatment system and a corresponding wastewater treatment method, and the method specifically comprises the following steps:
after pretreatment, the wastewater of synthetic ammonia is subjected to UASB reaction to remove COD;
after the wastewater treated by the steps is precipitated, pollutants such as COD, BOD, ammonia nitrogen and the like are degraded by anoxic/aerobic treatment.
The wastewater treatment method is simple in method, easy to implement and short in flow, and can remarkably improve the wastewater treatment effect.
The integrated process for recycling the synthetic ammonia wastewater provided by the invention realizes the effective removal of COD and ammonia nitrogen in the synthetic ammonia wastewater, and reaches the discharge standard of pollutants in synthetic ammonia industrial water. Part of the process equipment can be skid-mounted and modularized, and can be quickly produced according to different water quantities and different water qualities, so that the construction period is shortened, and the occupied area is reduced. The process has reasonable layout and advanced and reliable process flow, and is suitable for recycling the synthetic ammonia wastewater.
In summary, in practice, the wastewater treatment process of the present invention is carried out as follows:
and S1, discharging the synthetic ammonia wastewater into a regulating tank, removing large floating objects, and homogenizing.
And S2, lifting the wastewater in the adjusting tank by a lifting pump to enter an air floatation device, adding acid and alkali at an air floatation inlet to adjust the pH value, adding PAC and PAM agents into the air floatation tank, mixing the effluent after air floatation treatment and the wastewater after ammonia distillation tower deamination treatment to enter a water collecting tank, lifting the mixture by a water pump to enter a UASB reaction tank, and removing most of pollutants such as COD.
And S3, sending the effluent of the UASB reaction tank to a sedimentation tank, sending the effluent of the sedimentation tank to an anoxic/aerobic tank, degrading pollutants such as COD, BOD, ammonia nitrogen and the like by utilizing the degradation of microorganisms, sending the effluent to a secondary sedimentation tank, and sending the effluent to a subsequent unit after mud-water separation.
And S4, feeding the effluent of the secondary sedimentation tank into a Fenton reaction tank, and adding medicaments such as hydrogen peroxide, ferric sulfate and the like into the tank to further remove refractory organic matters in the wastewater.
And S5, enabling the effluent of the Fenton reaction tank to enter a Fenton sedimentation tank, and enabling the effluent to enter a clean water tank after mud-water separation to reach the standard and be discharged.
Compared with the prior art, the invention has the beneficial effects that:
(1) the treatment system of the invention aims at the technological method for removing the COD and the ammonia nitrogen of the synthetic ammonia wastewater, and realizes the standard-reaching reuse or discharge of the treatment of indexes of the COD, the ammonia nitrogen and the like of the synthetic ammonia wastewater mainly by combining the biochemical technology and the physicochemical technology scientifically, so the treatment system is worth being widely popularized and applied.
(2) The wastewater treatment method is simple, easy to implement and short in flow, and can remarkably improve the wastewater treatment effect.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
FIG. 1 is a flow chart showing the operation of the method for treating wastewater from ammonia synthesis according to example 1 of the present invention.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to examples, but it will be understood by those skilled in the art that the following examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
Example 1
The method for treating the wastewater of the synthetic ammonia comprises the following steps:
1) and (3) discharging the synthetic ammonia wastewater into an adjusting tank, removing large floating objects, homogenizing and homogenizing, and removing calcium and magnesium ions with high content in the wastewater.
2) The wastewater in the regulating reservoir is lifted by a lifting pump to enter the air floatation device, acid and alkali are added at an air floatation inlet to carry out pH regulation, PAC and PAM agents are added in the air floatation tank, the effluent after air floatation treatment and the wastewater after ammonia distillation tower deamination treatment are mixed to enter a water collecting tank, the effluent is lifted by a water pump to enter a UASB reaction tank, and most of pollutants such as COD are removed.
3) The effluent of the UASB reaction tank is sent to a middle sedimentation tank, the effluent of the middle sedimentation tank enters an anoxic/aerobic tank, pollutants such as COD, BOD, ammonia nitrogen and the like are degraded by the degradation action of microorganisms, the effluent enters a secondary sedimentation tank, and the sludge and water are separated and then enter a subsequent unit.
4) And (4) feeding the effluent of the secondary sedimentation tank into a Fenton reaction tank, and adding medicaments such as hydrogen peroxide, ferric sulfate and the like into the tank to further remove refractory organic matters in the wastewater.
5) The effluent of the Fenton reaction tank enters a Fenton sedimentation tank, the effluent enters a clean water tank after mud-water separation and is discharged up to standard, a secondary sedimentation tank and the bottom of the Fenton sedimentation tank are provided with a sludge tank for further treating the precipitated sludge, the sludge coming out of the bottom of the secondary sedimentation tank also goes to the sludge tank, and the sludge tank is connected with a sludge dewatering machine for dewatering the precipitated sludge.
The effluent of the clean water tank is detected to have COD below 8mg/L, BOD below 5mg/L and SS2mg/L, and the specific operation process is shown in figure 1.
Example 2
The method for treating the wastewater of the synthetic ammonia comprises the following steps:
1) and (3) discharging the synthetic ammonia wastewater into an adjusting tank, removing large floating objects, homogenizing and homogenizing, and removing calcium and magnesium ions with high content in the wastewater.
2) The wastewater in the regulating reservoir is lifted by a lifting pump to enter the air floatation device, acid and alkali are added at an air floatation inlet to carry out pH regulation, PAC and PAM agents are added in the air floatation tank, the effluent after air floatation treatment and the wastewater after ammonia distillation tower deamination treatment are mixed to enter a water collecting tank, the effluent is lifted by a water pump to enter a UASB reaction tank, and most of pollutants such as COD are removed.
3) The effluent of the UASB reaction tank is sent to a middle sedimentation tank, the effluent of the middle sedimentation tank enters an anoxic/aerobic tank, pollutants such as COD, BOD, ammonia nitrogen and the like are degraded by the degradation action of microorganisms, the effluent enters a secondary sedimentation tank, and the sludge and water are separated and then enter a subsequent unit.
4) And (4) feeding the effluent of the secondary sedimentation tank into a Fenton reaction tank, and adding medicaments such as hydrogen peroxide, ferric sulfate and the like into the tank to further remove refractory organic matters in the wastewater.
5) The effluent of the Fenton reaction tank enters a Fenton sedimentation tank, the effluent enters a clean water tank after mud-water separation and is discharged up to standard, a secondary sedimentation tank and the bottom of the Fenton sedimentation tank are provided with a sludge tank for further treating the precipitated sludge, the sludge coming out of the bottom of the secondary sedimentation tank also goes to the sludge tank, and the sludge tank is connected with a sludge dewatering machine for dewatering the precipitated sludge.
After the effluent of the clean water tank is treated by a reverse osmosis unit and a forward osmosis unit, the COD is detected to be below 5mg/L, the BOD is detected to be below 4mg/L, and the SS is detected to be below 1 mg/L.
Compared with the prior art, the invention has the beneficial effects that:
(1) the treatment system of the invention aims at the technological method for removing the COD and the ammonia nitrogen of the synthetic ammonia wastewater, and realizes the standard-reaching reuse or discharge of the treatment of indexes of the COD, the ammonia nitrogen and the like of the synthetic ammonia wastewater mainly by combining the biochemical technology and the physicochemical technology scientifically, so the treatment system is worth being widely popularized and applied.
(2) The wastewater treatment method is simple, easy to implement and short in flow, and can remarkably improve the wastewater treatment effect.
While particular embodiments of the present invention have been illustrated and described, it would be obvious that various other changes and modifications can be made without departing from the spirit and scope of the invention. It is therefore intended to cover in the appended claims all such changes and modifications that are within the scope of this invention.
Claims (8)
1. A wastewater treatment system for ammonia synthesis is characterized by comprising a pretreatment unit; the pretreatment unit is sequentially connected with a UASB reaction tank, a sedimentation tank and an anoxic/aerobic tank to realize the removal of COD, BOD and ammonia nitrogen in the wastewater.
2. The wastewater treatment system of claim 1, wherein the pretreatment unit comprises a conditioning tank, an air flotation device, and a catch basin in that order.
3. The wastewater treatment system according to claim 2, wherein the anoxic/aerobic tank is connected with a secondary sedimentation tank for separating sludge and water, the effluent of the secondary sedimentation tank is sent to a Fenton reaction tank for removing refractory organics, and hydrogen peroxide and ferric sulfate are added into the Fenton reaction tank.
4. The wastewater treatment system according to claim 3, wherein the Fenton reaction tank is connected with a Fenton sedimentation tank for performing sludge-water separation on the effluent of the Fenton reaction tank.
5. The wastewater treatment system according to claim 4, wherein the secondary sedimentation tank and the Fenton sedimentation tank are provided with sludge tanks at the bottoms thereof for further treating the settled sludge.
6. The wastewater treatment system according to claim 5, wherein a sludge dewatering machine for dewatering the precipitated sludge is connected to the sludge tank.
7. The wastewater treatment system of claim 5, wherein the effluent of the Fenton precipitation tank is discharged after reaching standards after being precipitated and filtered by a clean water tank.
8. A method for treating wastewater in a wastewater treatment system according to any of claims 1 to 7, comprising the steps of:
after pretreatment, the wastewater of synthetic ammonia is subjected to UASB reaction to remove COD;
after the wastewater treated by the steps is precipitated, pollutants such as COD, BOD, ammonia nitrogen and the like are degraded by anoxic/aerobic treatment.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011559572.5A CN112707593A (en) | 2020-12-25 | 2020-12-25 | Synthetic ammonia wastewater treatment system and treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011559572.5A CN112707593A (en) | 2020-12-25 | 2020-12-25 | Synthetic ammonia wastewater treatment system and treatment method |
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| Publication Number | Publication Date |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112744981A (en) * | 2020-12-25 | 2021-05-04 | 新疆水处理工程技术研究中心有限公司 | High-sulfur and high-COD wastewater treatment system and treatment method |
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| JP2003053383A (en) * | 2001-08-17 | 2003-02-25 | Nippon Steel Corp | Method for removing nitrogen from waste water |
| CN205892995U (en) * | 2016-06-30 | 2017-01-18 | 浙江环耀环境建设有限公司 | Medicine effluent disposal system |
| CN106007221A (en) * | 2016-07-12 | 2016-10-12 | 浙江环耀环境建设有限公司 | Pharmaceutical wastewater treatment process |
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Application publication date: 20210427 |