CN116768427A - Advanced treatment process for industrial wastewater - Google Patents
Advanced treatment process for industrial wastewater Download PDFInfo
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- 238000000926 separation method Methods 0.000 claims abstract description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 4
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 10
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 8
- 230000001546 nitrifying effect Effects 0.000 claims description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims description 7
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- 229910002651 NO3 Inorganic materials 0.000 claims description 4
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 4
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 claims description 4
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- 238000005243 fluidization Methods 0.000 claims description 4
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- 235000019345 sodium thiosulphate Nutrition 0.000 claims description 4
- 239000004408 titanium dioxide Substances 0.000 claims description 4
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 claims description 3
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- 229910000360 iron(III) sulfate Inorganic materials 0.000 claims description 3
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- 238000004065 wastewater treatment Methods 0.000 abstract description 12
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- 239000013043 chemical agent Substances 0.000 abstract description 8
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- 241001453382 Nitrosomonadales Species 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910006130 SO4 Inorganic materials 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- -1 ammonium calcium phosphate hydrogen Chemical class 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 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
- C02F1/24—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
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- 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
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
-
- 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
-
- 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
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved 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
- C02F1/72—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
- 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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- 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
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/10—Photocatalysts
-
- 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
- C02F3/302—Nitrification and denitrification treatment
- C02F3/303—Nitrification and denitrification treatment characterised by the nitrification
-
- 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
- C02F3/302—Nitrification and denitrification treatment
- C02F3/305—Nitrification and denitrification treatment characterised by the denitrification
-
- 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
- C02F3/302—Nitrification and denitrification treatment
- C02F3/307—Nitrification and denitrification treatment characterised by direct conversion of nitrite to molecular nitrogen, e.g. by using the Anammox process
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
The invention relates to the technical field of wastewater treatment, in particular to an industrial wastewater advanced treatment process. The device comprises a pretreatment unit, a biochemical treatment unit and an advanced oxidation and advanced treatment unit; the pretreatment unit comprises oil separation treatment, cyanogen removal/sulfur removal treatment and vacuum type air floatation treatment; the biochemical treatment unit comprises anaerobic reaction, anoxic reaction, aerobic reaction and precipitation treatment; advanced oxidation includes TJAOP+O3 reactor treatment and biological fluidized bed treatment; the advanced treatment unit comprises efficient precipitation treatment and sand filtration; in the industrial wastewater advanced treatment process, the industrial wastewater advanced treatment system is formed by organically combining the pretreatment unit, the biochemical treatment unit, the advanced oxidation unit and the advanced treatment unit, so that the treatment efficiency can be improved, the emission of pollutants is reduced, a better water quality emission effect is achieved, the use of chemical agents is reduced, and the sustainability is improved.
Description
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to an industrial wastewater advanced treatment process.
Background
The industrial wastewater treatment is a necessary task for protecting the environment, promoting ecological civilization construction and realizing sustainable development. The advanced treatment process is to further purify the wastewater after preliminary treatment so as to reach the discharge standard and even realize the recycling effect.
The existing advanced treatment technology of industrial wastewater mainly comprises a biological method, a physical and chemical method, a membrane method and the like. Biological methods include an activated sludge method, a biological membrane method, an artificial wetland method and the like, and the main principle is that organic substances, nitrogen, phosphorus and the like in water are degraded by microorganisms, but the treatment effect is difficult to stabilize, the operation is complex, the investment cost is high and the like; the physical and chemical methods comprise an adsorption method, an oxidation method, a precipitation method and the like, and the main principle is that the adsorption, the oxidation, the precipitation and the like are carried out through an adsorbent or a chemical agent, but the problems that the adsorbent is difficult to regenerate, the agent needs to be used in a large amount and the like exist; membrane methods comprise microfiltration, ultrafiltration, reverse osmosis and the like, and the main principle is that the membrane is filtered by membranes with different precision, but the problems of membrane pollution, high maintenance difficulty and the like exist.
Meanwhile, the prior art still has technical problems in treating high-concentration industrial wastewater, such as high-density wastewater treatment technology generally requires high drug input and generates a large amount of domestic garbage, CO2 emission and other environmental problems. Therefore, in the aspect of advanced treatment of industrial wastewater, an advanced treatment process of industrial wastewater with high treatment efficiency, high persistence and reduced use of chemical agents is urgently needed to meet the increasing wastewater treatment demands.
Disclosure of Invention
The invention aims to provide an advanced treatment process for industrial wastewater, so as to solve the problems in the prior art.
In order to achieve the above object, the present invention provides an industrial wastewater advanced treatment process, comprising a pretreatment unit, a biochemical treatment unit, an advanced oxidation and advanced treatment unit;
the pretreatment unit comprises the following steps:
s1.1, industrial wastewater enters a plate type oil separator for oil separation treatment, and a reagent is added into the wastewater subjected to oil separation for cyanide/sulfur removal treatment;
s1.2, removing suspended particles in the wastewater subjected to oil removal treatment by using vacuum type air bubbles for air floatation;
the biochemical treatment unit comprises the following steps:
s2.1, firstly carrying out anaerobic reaction on the pretreated wastewater, then carrying out anoxic reaction, and then carrying out aerobic reaction;
s2.2, the wastewater enters a sedimentation tank for sedimentation treatment;
the advanced oxidation treatment steps are as follows:
s3.1, treating the wastewater subjected to biochemical treatment by a TJAOP+O3 reactor;
s3.2, treating the wastewater treated by the TJAOP+O3 reactor by a biological fluidized bed;
the deep processing unit comprises the following steps:
s4.1, carrying out high-efficiency precipitation treatment on the wastewater subjected to the advanced oxidation treatment again;
s4.2, filtering the wastewater through a sand layer, and discharging water after deep filtration.
As a further improvement of the technical scheme, in S1.1, the medicament is sodium thiosulfate and sodium hydroxide.
As a further improvement of the technical scheme, in S2.1, the anaerobic reaction process is as follows: the waste water enters an anaerobic reaction tank, and microorganism strains are proliferated in the anaerobic reaction tank under the anoxic condition, and can metabolize part of organic matters to convert the organic matters into smaller molecules, and simultaneously release heat energy and methane gas;
the anoxic reaction process comprises the following steps: the wastewater enters an anoxic reaction tank, methane generated after anaerobic reaction in the anoxic reaction tank flows upwards through a biological membrane, and simultaneously nitrifying bacteria and denitrifying bacteria which grow cooperatively act on nitrogen waste with gradually increased concentration to reduce the nitrogen waste into gaseous N2 to be discharged to the atmosphere;
the aerobic reaction process comprises the following steps: the waste water enters an aerobic reaction tank, a food chain in the aerobic reaction tank is formed, organic matters are nitrified into nitrite and nitrate, and then are further metabolized and decomposed into harmless substances by nitrifying bacteria and aerobic bacteria, and meanwhile, intermediate heat energy and new bacteria are released by metabolism of the bacteria.
As a further improvement of the technical scheme, in S3.1, the treatment process of the tjaop+o3 reactor is as follows: in the reactor, the organic matters are oxidized and decomposed into smaller molecules by adding an O3 agent and a suspended titanium dioxide catalyst.
As a further improvement of the technical scheme, in S3.2, the biological fluidized bed treatment process is as follows: biological flora is used for air fluidization treatment to convert pollutants into functional substances.
As a further improvement of the technical scheme, in S4.1, the efficient precipitation treatment process is as follows: the wastewater enters a high-efficiency sedimentation tank, and is injected with a sedimentation auxiliary agent polymeric ferric sulfate to generate sedimentation.
Compared with the prior art, the invention has the beneficial effects that:
1. in the advanced treatment process of industrial wastewater, the pretreatment unit can remove or decompose a large amount of solid substances and substances which are not easy to decompose in the wastewater, so that the burden of a subsequent treatment unit can be effectively reduced, and the treatment efficiency and stability of the unit are improved; the biochemical treatment unit utilizes microorganisms to decompose organic matters in the wastewater, harmful substances which are difficult to degrade are also oxidized and decomposed after the advanced oxidation treatment unit, and excessive substances are further removed after the advanced treatment unit is used for treatment, so that the quality of the effluent reaches a higher level.
2. In the advanced treatment process of industrial wastewater, different technologies can remove different pollutants in the wastewater in a pretreatment unit and a biochemical treatment unit, and finally, various pollutants are further treated and removed by combining with a advanced oxidation treatment unit and an advanced treatment unit, and harmful substances and refractory substances of the wastewater are removed, so that the wastewater reaches the emission standard, and the quality of effluent water is ensured to be better; compared with chemical methods, the comprehensive application of different technical combinations can effectively reduce the use amount of chemical agents and reduce secondary pollution to the environment, so that the wastewater treatment is more sustainable and more environment-friendly and economical.
3. In the advanced treatment process of industrial wastewater, the advanced oxidation unit can oxidize and decompose organic matters into smaller molecules, so that the content of the organic matters in the wastewater is further reduced. The advanced treatment unit further performs high-efficiency precipitation treatment and filtration on the basis, and further removes products, tiny particles and the like generated by the conversion of organic matters, so that the purification effect of the wastewater is more perfect, and the water quality after the wastewater treatment is ensured to be more stable; this combination takes advantage of the two units, providing a more reliable and efficient solution for the advanced treatment of industrial wastewater.
4. In the industrial wastewater advanced treatment process, the industrial wastewater advanced treatment system formed by organically combining the pretreatment unit, the biochemical treatment unit, the advanced oxidation unit and the advanced treatment unit can improve the treatment efficiency, reduce the emission of pollutants, achieve better water quality emission effect, reduce the use of chemical agents and improve the sustainability.
Drawings
Fig. 1 is an overall flow block diagram of embodiment 1 of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1:
according to the embodiment of the invention, as shown in fig. 1, the advanced treatment process of industrial wastewater comprises a pretreatment unit, a biochemical treatment unit and an advanced oxidation and advanced treatment unit, and comprises the following specific steps:
1. pretreatment unit
(1) The industrial wastewater enters a plate-type oil separator for oil removal treatment, the wastewater after oil removal is subjected to cyanogen removal/sulfur removal treatment, a medicament is added into the wastewater, the medicament is sodium thiosulfate and sodium hydroxide, the sodium thiosulfate can decompose cyanide into stable substances such as NH3, CO2 and SO4, the cyanogen removal effect is achieved, the sodium hydroxide is used for forming precipitates of fluoride and sulfide and compounds such as barium sulfate, calcium hydrofluoric acid and ammonium calcium phosphate hydrogen, and then the precipitates are separated;
(2) The suspended particles in the wastewater after oil removal treatment are removed by adopting bubbles, vacuum air floatation is selected, the bubbles are generated by using vacuum and are combined with a centrifugal sedimentation technology for agglomerating suspended matters, the bubbles can be mutually embedded with the suspended matters due to pressure difference, and the wastewater with suspended matters removed enters the next working procedure.
2. Biochemical treatment unit
(1) The pretreated wastewater firstly undergoes anaerobic reaction, the wastewater enters an anaerobic reaction tank, and some microbial strains which are beneficial to the subsequent treatment process are proliferated in the anaerobic reaction tank under the anoxic condition, and can metabolize part of organic matters to convert the organic matters into smaller molecules, and simultaneously release heat energy and methane gas; then, the wastewater enters an anoxic reaction tank, methane generated after the anaerobic reaction in the anoxic reaction tank flows upwards through biological membranes of different materials, and simultaneously nitrifying bacteria and denitrifying bacteria which grow cooperatively act on nitrogen wastes with gradually increased concentration such as nitrite and nitrate to reduce the nitrogen wastes into gaseous N2 and discharge the gaseous N2 to the atmosphere; then carrying out aerobic reaction, wherein the wastewater enters an aerobic reaction tank, a food chain in the aerobic reaction tank is formed, organic matters are nitrified into nitrite and nitrate and then are further metabolized and decomposed into harmless substances such as CO2, H2O and the like by nitrifying bacteria and aerobic bacteria, and meanwhile, intermediate product heat energy and new bacteria are released by metabolism of the bacteria;
(2) The wastewater enters a sedimentation tank for sedimentation treatment, the treated water contains a certain suspended substance and organisms, tiny uneven sedimentation is generated through the previous treatment, at the moment, a sponge ball and a sedimentation tank are required to be placed for realizing 'last kilometer' sedimentation, the suspended substance is concentrated and sedimentated, and the residual water body after removal waits for discharge from an outlet.
3. Advanced oxidation
(1) The wastewater after biochemical treatment is firstly treated by a TJAOP+O3 reactor, and in the reactor, an O3 agent and a suspended titanium dioxide catalyst are added, so that organic matters are oxidized and decomposed into smaller molecules, and the subsequent biological treatment burden is reduced; TJAOP is a typical representation of a titanium dioxide homogeneous catalysis technology, O2 can be decomposed into active oxygen species through the action of ultraviolet light and carbon dioxide, and O3 is a common advanced oxidant;
(2) The wastewater treated by the TJAOP+O3 reactor is treated by a biological fluidized bed, a specific biological flora (such as nitrifying bacteria, denitrifying bacteria, anaerobic ammonia oxidizing bacteria and the like) is adopted to carry out air fluidization treatment, pollutants are converted into functional substances, and in the biological fluidized bed treatment, a biological membrane and a dropper interception and calling resistance bed form a microshifting plastid under the double action of space interval reflow touch, so that the indication biological activity is increased, and the reaction efficiency of air fluidization transformation, decomposition HO and the like is improved.
4. Advanced treatment unit
(1) The wastewater subjected to advanced oxidation treatment is subjected to high-efficiency precipitation treatment again, the wastewater enters a high-efficiency precipitation tank, and a precipitation auxiliary agent polymeric ferric sulfate is injected to generate a precipitation effect; the precipitation aid reacts with suspended matters in the wastewater to form large aggregates, so that the large aggregates are easier to precipitate, and the wastewater enters sand filtration treatment after the precipitates are removed;
(2) The wastewater is filtered through a sand layer, and sand in the sand layer has pore channels with the size of a treatment pool, so that most suspended particles can be blocked; the water is filtered through a sand bed, and the water is discharged after depth filtration; the method does not need to use chemical agents, has the advantages of high stability and high impurity removal performance, has better buffer effect on hardness and turbidity, and has better water quality.
In the embodiment of the invention, in the pretreatment unit, a large amount of solid substances and substances which are not easy to decompose in the wastewater are removed or decomposed, so that the burden of a subsequent treatment unit can be effectively reduced, and the treatment efficiency and stability of the unit are improved; the biochemical treatment unit utilizes microorganisms to decompose organic matters in the wastewater, harmful substances which are difficult to degrade are also oxidized and decomposed after passing through the advanced oxidation treatment unit, and excessive substances are further removed after being treated by the advanced treatment unit, so that the quality of the effluent reaches a higher level;
in the pretreatment unit and the biochemical treatment unit, different technologies can remove different pollutants in the wastewater, and finally, the advanced oxidation treatment and the advanced treatment unit are combined, so that various pollutants are further treated and removed, and harmful substances and refractory substances of the wastewater are removed, thereby enabling the wastewater to reach the emission standard and ensuring that the effluent quality is better;
compared with chemical methods, the comprehensive application of different technical combinations can effectively reduce the use amount of chemical agents and reduce secondary pollution to the environment, so that the wastewater treatment is more sustainable and more environment-friendly and economical;
the advanced oxidation unit can oxidize and decompose the organic matters into smaller molecules, so that the organic matter content in the wastewater is further reduced. The advanced treatment unit further performs high-efficiency precipitation treatment and filtration on the basis, and further removes products, tiny particles and the like generated by the conversion of organic matters, so that the purification effect of the wastewater is more perfect, and the water quality after the wastewater treatment is ensured to be more stable;
in summary, the industrial wastewater advanced treatment process of the embodiment of the invention is an industrial wastewater advanced treatment system formed by organically combining four units of the pretreatment unit, the biochemical treatment unit and the advanced oxidation and advanced treatment unit, so that the treatment efficiency can be improved, the emission of pollutants can be reduced, a better water quality emission effect can be achieved, the use of chemical agents can be reduced, and the sustainability can be improved.
In order to verify that the wastewater treatment process provided in the embodiment 1 of the present invention has a better treatment efficiency and a better water quality after wastewater treatment, the industrial wastewater advanced treatment process provided in the embodiment 1 of the present invention is described by the following examples.
Example 2:
in this example, the industrial wastewater was treated by the advanced industrial wastewater treatment process provided in example 1, the treated water amount was 15000m3/d, and specific detection indexes are shown in table 1.
Table 1:
| water treatment capacity (m 3/d) | Reduce the sewage discharge amount (m 3/d) | Reuse water (m 3/d) | Standard for reuse of water quality | Contaminant removal rate (%) |
| 15000 | 14500 | 14200 | GB 50335-2016 | ≥98 |
According to the table 1, when the water treatment amount is 15000m3/d, the recycling amount of the wastewater reaches 14200m3/d, the recycling water quality standard meets the recycling standard of urban wastewater recycling engineering design Specification (GB 50335-2016), the recycled water is directly supplemented with circulating cooling water, the sewage discharge amount 14500m3/d is reduced, and meanwhile, the pollutant removal rate in the wastewater can reach more than 98%, so that the industrial wastewater deep treatment process provided by the invention can be explained to further save water resources, reduce the emission of pollutants, improve the sustainability of the water resources and reduce the cost.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above-described embodiments, and that the above-described embodiments and descriptions are only preferred embodiments of the present invention, and are not intended to limit the invention, and that various changes and modifications may be made therein without departing from the spirit and scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. The advanced treatment process of the industrial wastewater is characterized by comprising the following steps of: comprises a pretreatment unit, a biochemical treatment unit, an advanced oxidation and advanced treatment unit;
the pretreatment unit comprises the following steps:
s1.1, industrial wastewater enters a plate type oil separator for oil separation treatment, and a reagent is added into the wastewater subjected to oil separation for cyanide/sulfur removal treatment;
s1.2, removing suspended particles in the wastewater subjected to oil removal treatment by using vacuum type air bubbles for air floatation;
the biochemical treatment unit comprises the following steps:
s2.1, firstly carrying out anaerobic reaction on the pretreated wastewater, then carrying out anoxic reaction, and then carrying out aerobic reaction;
s2.2, the wastewater enters a sedimentation tank for sedimentation treatment;
the advanced oxidation treatment steps are as follows:
s3.1, treating the wastewater subjected to biochemical treatment by a TJAOP+O3 reactor;
s3.2, treating the wastewater treated by the TJAOP+O3 reactor by a biological fluidized bed;
the deep processing unit comprises the following steps:
s4.1, carrying out high-efficiency precipitation treatment on the wastewater subjected to the advanced oxidation treatment again;
s4.2, filtering the wastewater through a sand layer, and discharging water after deep filtration.
2. The industrial wastewater advanced treatment process according to claim 1, wherein: in the step S1.1, the medicament is sodium thiosulfate and sodium hydroxide.
3. The industrial wastewater advanced treatment process according to claim 1, wherein: in the S2.1, the anaerobic reaction process is as follows: the wastewater enters an anaerobic reaction tank, and microorganism strains are proliferated in the anaerobic reaction tank under the anoxic condition;
the anoxic reaction process comprises the following steps: the wastewater enters an anoxic reaction tank, methane generated after anaerobic reaction in the anoxic reaction tank flows upwards through a biological membrane, and simultaneously nitrifying bacteria and denitrifying bacteria which grow cooperatively act on nitrogen waste with gradually increased concentration to reduce the nitrogen waste into gaseous N2 to be discharged to the atmosphere;
the aerobic reaction process comprises the following steps: the waste water enters an aerobic reaction tank, a food chain in the aerobic reaction tank is formed, organic matters are nitrified into nitrite and nitrate, and then are further metabolized and decomposed into harmless substances by nitrifying bacteria and aerobic bacteria, and meanwhile, intermediate heat energy and new bacteria are released by metabolism of the bacteria.
4. The industrial wastewater advanced treatment process according to claim 1, wherein: in the S3.1, the TJAOP+O3 reactor treatment process comprises the following steps: in the reactor, the organic matters are oxidized and decomposed into smaller molecules by adding an O3 agent and a suspended titanium dioxide catalyst.
5. The industrial wastewater advanced treatment process according to claim 1, wherein: in the step S3.2, the biological fluidized bed treatment process comprises the following steps: biological flora is used for air fluidization treatment to convert pollutants into functional substances.
6. The industrial wastewater advanced treatment process according to claim 1, wherein: in the step S4.1, the high-efficiency precipitation treatment process comprises the following steps: the wastewater enters a high-efficiency sedimentation tank, and is injected with a sedimentation auxiliary agent polymeric ferric sulfate to generate sedimentation.
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