CN220537607U - High-nitrate nitrogen high-organic nitrogen electroplating wastewater treatment system - Google Patents
High-nitrate nitrogen high-organic nitrogen electroplating wastewater treatment system Download PDFInfo
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- CN220537607U CN220537607U CN202322036936.7U CN202322036936U CN220537607U CN 220537607 U CN220537607 U CN 220537607U CN 202322036936 U CN202322036936 U CN 202322036936U CN 220537607 U CN220537607 U CN 220537607U
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 51
- 238000009713 electroplating Methods 0.000 title claims abstract description 33
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 31
- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 11
- 229910002651 NO3 Inorganic materials 0.000 title claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 74
- 238000004176 ammonification Methods 0.000 claims abstract description 42
- 239000002351 wastewater Substances 0.000 claims abstract description 40
- 230000001105 regulatory effect Effects 0.000 claims abstract description 31
- 239000010802 sludge Substances 0.000 claims abstract description 27
- 238000004062 sedimentation Methods 0.000 claims abstract description 25
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000007788 liquid Substances 0.000 claims abstract description 21
- 230000001546 nitrifying effect Effects 0.000 claims abstract description 20
- 238000010992 reflux Methods 0.000 claims abstract description 15
- 125000001477 organic nitrogen group Chemical group 0.000 claims description 23
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
- 230000014759 maintenance of location Effects 0.000 claims description 5
- 239000001301 oxygen Substances 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- 238000000034 method Methods 0.000 description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- 239000003344 environmental pollutant Substances 0.000 description 5
- 231100000719 pollutant Toxicity 0.000 description 5
- 241000894006 Bacteria Species 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 229910021529 ammonia Inorganic materials 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000029087 digestion Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 2
- 230000009935 nitrosation Effects 0.000 description 2
- 238000007034 nitrosation reaction Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000026676 system process Effects 0.000 description 2
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 1
- 230000003851 biochemical process Effects 0.000 description 1
- 150000001722 carbon compounds Chemical class 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000012258 culturing Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- QELJHCBNGDEXLD-UHFFFAOYSA-N nickel zinc Chemical compound [Ni].[Zn] QELJHCBNGDEXLD-UHFFFAOYSA-N 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The utility model provides a treatment system of high-nitrogen high-organic nitrogen electroplating wastewater, which is characterized by comprising an adjusting tank, a preposed ammonification denitrification tank, an aerobic tank and a sedimentation tank which are sequentially connected along the wastewater treatment direction; a system water inlet pipe is arranged on the regulating tank, and a system water outlet pipe is arranged on the sedimentation tank; the regulating tank is also provided with a regulating tank water outlet pipe which is connected to the bottom of the pre-ammoniation denitrification tank, and the regulating tank water outlet pipe is also provided with a nitrate nitrogen dosing pipe; a nitrifying liquid return pipe is arranged on the aerobic tank and is connected to the bottom of the front ammoniation denitrification tank; the bottom of the sedimentation tank is provided with a sludge return pipe which is connected to the bottom of the aerobic tank; the three-phase separator is arranged in the pre-ammonification denitrification tank, an outlet cofferdam is arranged on the tank wall of the pre-ammonification denitrification tank, a water inlet main pipe is arranged at the bottom of the pre-ammonification denitrification tank, and the water inlet main pipe collects the outlet water of the regulating tank and the reflux nitrifying liquid of the aerobic tank.
Description
Technical Field
The utility model relates to a treatment device of electroplating wastewater, in particular to a treatment system of high-nitrate nitrogen and high-organic nitrogen electroplating wastewater.
Background
In the electroplating industry, wastewater containing large amounts of nitrate nitrogen and organic nitrogen contaminants is discharged from various electroplating processes. The high-nitrate-nitrogen high-organic-nitrogen electroplating wastewater has the basic characteristics of complex water quality components, high pollutant content, more toxic and harmful substances and the like, has high treatment difficulty and low emission standard reaching rate, and has predictable increasing trend of nitrate nitrogen and organic nitrogen concentration in the electroplating wastewater along with the recent wide development of electroplating species such as zinc-nickel alloy, chemical plating and the like. The discharge of nitrogen pollutants in electroplating wastewater is already an industrial problem, but how to develop an efficient treatment process aiming at the water quality characteristics of high-nitrogen high-organic nitrogen electroplating wastewater is still a research problem which needs to be urgently solved at present.
Although there are many mature treatment devices for nitrogen-containing wastewater, there are still problems in the operation of these devices: (1) ZL2021234153369 discloses a high-nitrate nitrogen wastewater denitrification device of an anaerobic denitrification system, and the system is only suitable for treating high-nitrate nitrogen wastewater and cannot be applied to wastewater containing high-nitrate nitrogen and high-organic nitrogen in a synchronous treatment mode. (2) ZL2021222785160 discloses an integrated reactor for biological carbon and nitrogen removal for treating organic nitrogen wastewater, which is characterized in that anaerobic digestion is simultaneously performed with denitrification, nitrosation and anaerobic ammoxidation are partitioned in a single reactor, and the integration of anaerobic digestion, simultaneous denitrification, partial nitrosation and anaerobic ammoxidation reaction devices is realized, but the device cannot be applied to the treatment of electroplating wastewater containing high nitrogen and high organic nitrogen. The utility model aims to invent a high-nitrate-nitrogen and high-organic-nitrogen electroplating wastewater treatment system, and provides a set of front and feasible process flow for high-efficiency removal of nitrate nitrogen and organic nitrogen in the electroplating wastewater and standard discharge of total nitrogen by combining the water quality characteristics of the high-nitrate-nitrogen and high-organic-nitrogen electroplating wastewater and optimizing the system process and equipment and adjusting the operation parameters.
Disclosure of Invention
In order to solve the technical problems, the utility model provides a high-nitrate nitrogen high-organic nitrogen electroplating wastewater treatment system, which adopts the following technical scheme:
the system for treating the high-nitrogen high-organic nitrogen electroplating wastewater is characterized by comprising an adjusting tank, a front ammoniation denitrification tank, an aerobic tank and a sedimentation tank which are sequentially connected along the wastewater treatment direction; a system water inlet pipe is arranged on the regulating tank, and a system water outlet pipe is arranged on the sedimentation tank; the regulating tank is also provided with a regulating tank water outlet pipe which is connected to the bottom of the pre-ammoniation denitrification tank, and the regulating tank water outlet pipe is also provided with a nitrate nitrogen dosing pipe; a nitrifying liquid return pipe is arranged on the aerobic tank and is connected to the bottom of the front ammoniation denitrification tank; the bottom of the sedimentation tank is provided with a sludge return pipe which is connected to the bottom of the aerobic tank; the three-phase separator is arranged in the pre-ammonification denitrification tank, an outlet cofferdam is arranged on the tank wall of the pre-ammonification denitrification tank, a water inlet main pipe is arranged at the bottom of the pre-ammonification denitrification tank, and the water inlet main pipe collects the outlet water of the regulating tank and the reflux nitrifying liquid of the aerobic tank.
Further, the three-phase separator comprises an annular guide plate, an air outlet pipe and an annular guide plate; an air outlet pipe is arranged at the upper part of the annular guide plate, and the included angle between the annular guide plate and the air outlet pipe is controlled to be 120-135 degrees; the annular drainage plate is arranged around the inner wall of the pre-ammonification denitrification tank body along a circle, and the included angle between the annular drainage plate and the inner wall of the pre-ammonification denitrification tank body is controlled to be 30-45 degrees; the lower end of the annular flow guide plate is higher than the lower end of the annular flow guide plate.
Further, the reflux ratio of the nitrifying liquid of the aerobic tank and the pre-ammonification denitrification tank is controlled to be 100-400%.
Further, the sludge reflux ratio of the sedimentation tank and the aerobic tank is controlled to be 50-75%.
Further, the pH in the regulating tank is controlled to be 6.5-7.5.
Further, the height-diameter ratio of the pre-ammonification denitrification tank body is controlled to be 3:1-4:1, inoculated sludge in the pre-ammonification denitrification tank is high-efficiency denitrification sludge, the concentration of dissolved oxygen in the pre-ammonification denitrification tank is controlled to be within 0.5mg/L, and the hydraulic retention time is controlled to be 10-24 hours.
Further, the organic nitrogen concentration of the inlet water of the treatment system is 50-100mg/L, and the nitrate nitrogen concentration is 50-150mg/L.
Compared with the prior art, the utility model has the advantages that:
(1) The treatment device is characterized in that a common denitrification tank in a biochemical system is arranged in front and organically combined with a hydrolysis tank to construct a novel front ammoniation denitrification tank, organic nitrogen pollutants in wastewater are effectively utilized as carbon sources, the consumption of the carbon sources in the whole system is saved, and high-efficiency denitrification is realized with more economic treatment cost;
(2) According to the utility model, the high-efficiency denitrifying bacteria are directly used for ammonifying the organic nitrogen in the wastewater, so that synchronous ammonification and denitrification of the denitrifying bacteria are realized, the sludge source is wide, the taking is convenient, the effect is obvious, and the time for domesticating and culturing strains in a biochemical system is greatly shortened.
(3) The treatment device adopts a full biochemical process to remove the organic nitrogen in the wastewater, has considerable organic nitrogen removal efficiency, effectively avoids the high cost and high investment of a materialization process, reduces the operation difficulty of maintenance personnel, and reduces the operation management cost.
(4) The device enables the mud water in the front-end ammoniation denitrification tank to be efficiently separated by arranging the three-phase separator in the front-end ammoniation denitrification tank, and can enable the front-end ammoniation denitrification tank to realize stable water outlet by arranging the water outlet cofferdam.
Drawings
FIG. 1 is a schematic diagram of a system of the present utility model; fig. 2 is a schematic structural diagram of a pre-ammonification denitrification tank.
The device comprises a 1-system water inlet pipe, a 2-regulating tank, a 3-preposed ammonification denitrification tank, a 4-aerobic tank, a 5-sedimentation tank, a 6-system water outlet pipe, a 7-nitrifying liquid return pipe, an 8-sludge return pipe, a 9-nitrate nitrogen dosing pipe, a 10-regulating tank water outlet pipe, a 11-water inlet main pipe, a 12-three-phase separator, a 13-annular drainage plate, a 14-annular drainage plate, a 15-air outlet pipe and a 16-water outlet cofferdam.
Description of the embodiments
The utility model is further illustrated and described below with reference to the drawings and detailed description.
As shown in figures 1 and 2, the system for treating high-nitrate nitrogen and high-organic nitrogen electroplating wastewater provided by the utility model comprises a system water inlet pipe 1, an adjusting tank 2, a preposed ammonification denitrification tank 3, an aerobic tank 4, a sedimentation tank 5, a system water outlet pipe 6, a nitrifying liquid return pipe 7, a sludge return pipe 8, a nitrate nitrogen dosing pipe 9, an adjusting tank water outlet pipe 10, a water inlet main pipe 11, a three-phase separator 12, an annular drainage plate 13, an annular drainage plate 14, an air outlet pipe 15 and a water outlet cofferdam 16.
The system comprises an adjusting tank 2, a preposed ammonification denitrification tank 3, an aerobic tank 4 and a sedimentation tank 5 which are sequentially connected along the wastewater treatment direction; a system water inlet pipe 1 is arranged on the regulating tank 2, and a system water outlet pipe 6 is arranged on the sedimentation tank 5; the regulating tank 2 is also provided with a regulating tank water outlet pipe 10, the regulating tank water outlet pipe 10 is connected to the bottom of the pre-ammoniation denitrification tank 3, and the regulating tank water outlet pipe 10 is also provided with a nitrate nitrogen dosing pipe 9; a nitrifying liquid return pipe 7 is arranged on the aerobic tank 4, and the nitrifying liquid return pipe 7 is connected to the bottom of the pre-ammoniation denitrification tank 3; a sludge return pipe 8 is arranged at the bottom of the sedimentation tank 5, and the sludge return pipe 8 is connected to the bottom of the aerobic tank 4; the three-phase separator 12 is arranged in the pre-ammonification denitrification tank 3, an outlet cofferdam 16 is arranged on the tank wall of the pre-ammonification denitrification tank 3, a water inlet main pipe 11 is arranged at the bottom of the pre-ammonification denitrification tank 3, and the water inlet main pipe 11 collects the outlet water of the regulating tank 2 and the reflux nitrifying liquid of the aerobic tank 4.
The three-phase separator 12 comprises an annular guide plate 14, an air outlet pipe 15 and an annular guide plate 13; an air outlet pipe 15 is arranged at the upper part of the annular guide plate 14, and the included angle between the annular guide plate 14 and the air outlet pipe 15 is controlled to be 120-135 degrees; the annular drainage plate 13 is arranged around the inner wall of the pre-ammonification denitrification tank 3 along a circle, and the included angle between the annular drainage plate 13 and the inner wall of the pre-ammonification denitrification tank 3 is controlled to be 30-45 degrees; the lower end of the annular flow guiding plate 13 is higher than the lower end of the annular flow guiding plate 14. The reflux ratio of the nitrifying liquid of the aerobic tank 4 and the pre-ammonification denitrification tank 3 is controlled to be 100-400%. The sludge reflux ratio of the sedimentation tank 5 and the aerobic tank 4 is controlled to be 50-75%. The pH in the regulating tank 5 is controlled to be 6.5-7.5. The height-diameter ratio of the body of the pre-ammonification denitrification tank 3 is controlled to be 3:1-4:1, inoculated sludge in the pre-ammonification denitrification tank 3 is high-efficiency denitrification sludge, the concentration of dissolved oxygen in the pre-ammonification denitrification tank 3 is controlled to be within 0.5mg/L, and the hydraulic retention time is controlled to be 10-24 hours. The organic nitrogen concentration of the water inlet of the treatment system is 50-100mg/L, and the nitrate nitrogen concentration is 50-150mg/L.
The processing flow of the system is as follows: the high ammonia nitrogen high organic nitrogen electroplating wastewater enters an adjusting tank 2 through a system water inlet pipe 1, the pH value of the wastewater is adjusted to 6.5-7.5 in the adjusting tank 2, and effluent of the adjusting tank 2 enters a front ammoniation denitrification tank 3 through an adjusting tank water outlet pipe 10 and a water inlet main pipe 11. In the pre-ammonification denitrification tank 3, the concentration of dissolved oxygen is controlled within 0.5mg/L, the hydraulic retention time is controlled to be 10-24 hours, the concentration of nitrate nitrogen is controlled to be 50-150mg/L, and if the concentration of nitrate nitrogen is too low, nitrate nitrogen can be added through a nitrate nitrogen adding pipe. And inoculating high-efficiency denitrification sludge in the pre-ammoniation denitrification tank 3, wherein denitrifying bacteria utilize organic carbon compounds (including organic nitrogen pollutants) in electroplating wastewater as carbon sources to perform denitrification, and gradually reduce nitrate nitrogen in the wastewater into nitrogen. Meanwhile, denitrifying bacteria can carry out high-efficiency ammoniation on organic nitrogen substances in the wastewater, so that a large amount of organic nitrogen in the wastewater is converted into ammonia nitrogen, and the nitrate nitrogen and the organic nitrogen in the wastewater can be synchronously removed in the process. The upper part of the preposed ammonia oxidation denitrification tank 3 is provided with a three-phase separator 12, wherein mud-water separation is realized under the action of an annular drainage plate 13 and an annular drainage plate 14, sludge is trapped at the lower part of the three-phase separator 12, and sewage is uniformly discharged under the action of a water outlet cofferdam 16 after passing through the three-phase separator 12. Anaerobic waste gas generated in the front ammoniation denitrification tank 3 is collected intensively through an air outlet pipe. The effluent of the pre-ammonia oxidation denitrification tank 3 enters an aerobic tank 4, ammonia nitrogen is converted into nitrate nitrogen in the aerobic tank 4, part of nitrifying liquid in the aerobic tank 4 flows back to the pre-ammonia oxidation denitrification tank 3, and the nitrifying liquid reflux ratio is controlled to be 100-400%. The effluent of the aerobic tank 4 enters a sedimentation tank 5, part of sludge in the sedimentation tank 5 flows back to the aerobic tank 4, and the sludge reflux ratio is controlled to be 50-75%. The effluent of the sedimentation tank 5 is discharged out of the system through a system water outlet pipe 6.
At present, the synchronous removal of high organic nitrogen and high nitrate nitrogen is difficult to realize by aiming at the process of a treatment system of nitrogenous wastewater. The utility model aims to invent a high-nitrate-nitrogen and high-organic-nitrogen electroplating wastewater treatment system, and provides a set of front and feasible process flow for high-efficiency removal of nitrate nitrogen and organic nitrogen in the electroplating wastewater and standard discharge of total nitrogen by combining the water quality characteristics of the high-nitrate-nitrogen and high-organic-nitrogen electroplating wastewater and optimizing the system process and equipment and adjusting the operation parameters.
Examples
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments of the present utility model.
The technical scheme is adopted to make a high-nitrate nitrogen high-organic nitrogen electroplating wastewater treatment system in a trial mode, and as shown in fig. 1 and 2, the system comprises a system water inlet pipe 1, an adjusting tank 2, a preposed ammonification denitrification tank 3, an aerobic tank 4, a sedimentation tank 5, a system water outlet pipe 6, a nitrifying liquid return pipe 7, a sludge return pipe 8, a nitrate nitrogen dosing pipe 9, an adjusting tank water outlet pipe 10, a water inlet main pipe 11, a three-phase separator 12, an annular drainage plate 13, an annular guide plate 14, an air outlet pipe 15 and an effluent cofferdam 16.
The system comprises an adjusting tank 2, a preposed ammonification denitrification tank 3, an aerobic tank 4 and a sedimentation tank 5 which are sequentially connected along the wastewater treatment direction; a system water inlet pipe 1 is arranged on the regulating tank 2, and a system water outlet pipe 6 is arranged on the sedimentation tank 5; the regulating tank 2 is also provided with a regulating tank water outlet pipe 10, the regulating tank water outlet pipe 10 is connected to the bottom of the pre-ammoniation denitrification tank 3, and the regulating tank water outlet pipe 10 is also provided with a nitrate nitrogen dosing pipe 9; a nitrifying liquid return pipe 7 is arranged on the aerobic tank 4, and the nitrifying liquid return pipe 7 is connected to the bottom of the pre-ammoniation denitrification tank 3; a sludge return pipe 8 is arranged at the bottom of the sedimentation tank 5, and the sludge return pipe 8 is connected to the bottom of the aerobic tank 4; the three-phase separator 12 is arranged in the pre-ammonification denitrification tank 3, an outlet cofferdam 16 is arranged on the tank wall of the pre-ammonification denitrification tank 3, a water inlet main pipe 11 is arranged at the bottom of the pre-ammonification denitrification tank 3, and the water inlet main pipe 11 collects the outlet water of the regulating tank 2 and the reflux nitrifying liquid of the aerobic tank 4.
The three-phase separator 12 comprises an annular guide plate 14, an air outlet pipe 15 and an annular guide plate 13; an air outlet pipe 15 is arranged at the upper part of the annular guide plate 14, and the included angle between the annular guide plate 14 and the air outlet pipe 15 is controlled to be 130 degrees; the annular drainage plate 13 is arranged around the inner wall of the front-end ammoniation denitrification tank 3 for a circle, and the included angle between the annular drainage plate 13 and the inner wall of the front-end ammoniation denitrification tank 3 is controlled to be 40 degrees; the lower end of the annular flow guiding plate 13 is higher than the lower end of the annular flow guiding plate 14. The reflux ratio of the nitrifying liquid of the aerobic tank 4 and the pre-ammonification denitrification tank 3 is controlled to be 200 percent. The sludge reflux ratio of the sedimentation tank 5 and the aerobic tank 4 is controlled to be 60 percent. The pH in the regulating tank 5 is controlled at 7.0. The height-diameter ratio of the body of the pre-ammonification denitrification tank 3 is controlled to be 3:1, inoculated sludge in the pre-ammonification denitrification tank 3 is high-efficiency denitrification sludge, the concentration of dissolved oxygen in the pre-ammonification denitrification tank 3 is controlled to be within 0.5mg/L, and the hydraulic retention time is controlled to be 16 hours. The organic nitrogen concentration of the water inlet of the treatment system is 50mg/L, and the nitrate nitrogen concentration is 100mg/L.
The system is used for treating the high ammonia nitrogen and high organic nitrogen electroplating wastewater with triethanolamine as a main organic nitrogen pollutant, the quality of the inlet water, the outlet water after being treated by the pre-ammoniation denitrification tank and the outlet water of the system are as shown in the table 1, so that the pre-ammoniation denitrification tank can be used for better removing nitrate nitrogen and organic nitrogen in the wastewater.
Table 1 drainage index data
| Type of water quality | pH | COD(mg/L) | TN(mg/L) | NH 4 + -N(mg/L) | NO 3 — -N(mg/L) | ON(mg/L) |
| Inflow of water | 10~11 | 650 | 180 | 30 | 100 | 50 |
| Ammoniation effluent | 7 | 130 | 70 | 70 | <0.1 | <0.1 |
| Effluent water | 7 | 55 | 3 | <2 | <0.1 | <0.1 |
The above examples are only intended to illustrate one embodiment of the present utility model, not to limit it. It should be noted that: modifications of the technical solutions described in the above embodiments or equivalent substitutions of some or all of the technical features thereof may be made by those skilled in the art; these modifications or substitutions do not depart from the essence of the corresponding technical solutions from the protection scope of the technical solutions of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Claims (7)
1. The system for treating the high-nitrogen high-organic nitrogen electroplating wastewater is characterized by comprising an adjusting tank, a front ammoniation denitrification tank, an aerobic tank and a sedimentation tank which are sequentially connected along the wastewater treatment direction; a system water inlet pipe is arranged on the regulating tank, and a system water outlet pipe is arranged on the sedimentation tank; the regulating tank is also provided with a regulating tank water outlet pipe which is connected to the bottom of the pre-ammoniation denitrification tank, and the regulating tank water outlet pipe is also provided with a nitrate nitrogen dosing pipe; a nitrifying liquid return pipe is arranged on the aerobic tank and is connected to the bottom of the front ammoniation denitrification tank; the bottom of the sedimentation tank is provided with a sludge return pipe which is connected to the bottom of the aerobic tank; the three-phase separator is arranged in the pre-ammonification denitrification tank, an outlet cofferdam is arranged on the tank wall of the pre-ammonification denitrification tank, a water inlet main pipe is arranged at the bottom of the pre-ammonification denitrification tank, and the water inlet main pipe collects the outlet water of the regulating tank and the reflux nitrifying liquid of the aerobic tank.
2. The system for treating high-nitrate nitrogen high-organic nitrogen electroplating wastewater according to claim 1, wherein the three-phase separator comprises an annular guide plate, an air outlet pipe and an annular guide plate; an air outlet pipe is arranged at the upper part of the annular guide plate, and the included angle between the annular guide plate and the air outlet pipe is controlled to be 120-135 degrees; the annular drainage plate is arranged around the inner wall of the pre-ammonification denitrification tank body along a circle, and the included angle between the annular drainage plate and the inner wall of the pre-ammonification denitrification tank body is controlled to be 30-45 degrees; the lower end of the annular flow guide plate is higher than the lower end of the annular flow guide plate.
3. The system for treating high-nitrate-nitrogen high-organic-nitrogen electroplating wastewater according to claim 1, wherein the reflux ratio of nitrifying liquid in the aerobic tank and the pre-ammoniation denitrification tank is controlled to be 100-400%.
4. The system for treating high-nitrate nitrogen and high-organic nitrogen electroplating wastewater according to claim 1, wherein the sludge reflux ratio of the sedimentation tank and the aerobic tank is controlled to be 50-75%.
5. The system for treating high-nitrate nitrogen and high-organic nitrogen electroplating wastewater according to claim 1, wherein the pH in the regulating tank is controlled to be 6.5-7.5.
6. The system for treating high-nitrogen and high-organic nitrogen electroplating wastewater according to claim 1, wherein the height-diameter ratio of the pre-ammoniation denitrification tank body is controlled to be 3:1-4:1, inoculated sludge in the pre-ammoniation denitrification tank is high-efficiency denitrification sludge, the concentration of dissolved oxygen in the pre-ammoniation denitrification tank is controlled to be within 0.5mg/L, and the hydraulic retention time is controlled to be 10-24 hours.
7. The system for treating high-nitrate nitrogen and high-organic nitrogen electroplating wastewater according to claim 1, wherein the concentration of organic nitrogen in the inlet water of the treatment system is 50-100mg/L, and the concentration of nitrate nitrogen is 50-150mg/L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202322036936.7U CN220537607U (en) | 2023-08-01 | 2023-08-01 | High-nitrate nitrogen high-organic nitrogen electroplating wastewater treatment system |
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| CN202322036936.7U CN220537607U (en) | 2023-08-01 | 2023-08-01 | High-nitrate nitrogen high-organic nitrogen electroplating wastewater treatment system |
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| CN220537607U true CN220537607U (en) | 2024-02-27 |
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