CN103058456A - Device and method for UV oxidation photolysis-based restoration of polychlorinated biphenyl-polluted underground water - Google Patents
Device and method for UV oxidation photolysis-based restoration of polychlorinated biphenyl-polluted underground water Download PDFInfo
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- CN103058456A CN103058456A CN2012105857356A CN201210585735A CN103058456A CN 103058456 A CN103058456 A CN 103058456A CN 2012105857356 A CN2012105857356 A CN 2012105857356A CN 201210585735 A CN201210585735 A CN 201210585735A CN 103058456 A CN103058456 A CN 103058456A
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Abstract
The invention belongs to the technical field of the polychlorinated biphenyl-polluted environment restoration and relates to a device and a method for UV oxidation photolysis-based restoration of polychlorinated biphenyl-polluted underground water. The device is characterized in that an underground water collection device, a photolysis treatment device, a transmission pump, a biological treatment device, a detection device and a recharging device are orderly connected; the underground water collection device and the photolysis treatment device are arranged in a suction well; the transmission pump, the biological treatment device, the detection device and the recharging device are arranged on the ground; and the photolysis treatment device and the biological treatment device are connected respectively to their controllers arranged on the ground. The method utilizes photolysis restoration as a main process and other restoration means (biological means) as auxiliary processes, adopts the device having a compact structure, and has a clear technological process, simple processes and high reliability. The device and the method greatly improve a polychlorinated biphenyl pollution restoration range, and have high work efficiency and pollutant clearance. Product water obtained by the device and the method has good quality, has a polychlorinated biphenyl removal rate more than 90% and has pollution indexes reaching the national wastewater integrated discharge primary standard.
Description
Technical field
The invention belongs to pollution by polychlorinated biphenyles environment remediation technical field, be specifically related to a kind of device and method of repairing polychlorobiphenyl in the underground water based on UV oxidation photodissociation.
Background technology
Polychlorobiphenyl (polychlorinated biphenyls, PCBs) is that biphenyl is in varying degrees, by the general name of the artificial organic compound that generates after the replacement of chlorine atom.Have the characteristics such as good unreactiveness, heat impedance, insulativity because of it, once produce in a large number as a kind of Industrial products and be widely used in the fields such as power industry, Plastics Processing Industry, chemical industry and printing.So stop to produce when studies have shown that PCBs to have the nature of danger such as immunotoxicity, nerve and development toxicity, hepatotoxicity and teratogenesis, mutagenesis, carinogenicity and when using, PCBs has caused its extensive distribution and accumulation in environment in industrial a large amount of uses.PCBs the most representative this persistence organic pollutant has 10 years production histories (1965-1975 years) approximately in China, and accumulative total is produced nearly ten thousand tons.So China is faced with and administers the challenge that PCBs pollutes.
Underground water has close relationship as water body important on the earth with human society.Having as at huge reservoir of underground formation of underground water with its stable water supply conditions, good water quality, and becomes the important water source of agricultural irrigation, industrial and mining enterprises and city domestic water.According to incompletely statistics, the exploitation utilization of China's underground water accounts for 10% to 15% of national total water amount, and wherein each provinces and regions, the north are because surface water resources is not enough, and the mining of groundwater utilization is very large.The following complex formation in earth's surface, Groundwater Flow is extremely slow, and therefore, groundwater pollution has the advantages that process is slow, be difficult for discovery and be difficult to administer.In a single day underground water polluted, even thoroughly eliminate its source of pollution, reparation is also wanted more than ten years even decades and just can be made the water quality recovery naturally.The PCBs that is present in the environment discharges, is deposited in the soil with different approaches, is dissolved in the underground water.Just do not utilized by industrial or agricultural if contaminated underground water is treated, even as the drinking water source, will cause great threat to people's life security.
Since people recognize the pollution situation of polychlorobiphenyl and to the harm of human and environment, many scientific workers just put in the research that pollution by polychlorinated biphenyles administers.At present, industrial technology and test method mainly comprise the technology of thermal treatment, chemical treatment, photodegradation and biological treatment several respects.Heat treatment technics can be divided into pyroprocessing method and subzero treatment method two large classes: the pyroprocessing method is a waste treatment that is widely adopted, but its treatment condition requirement is harsh, cost is higher and generate easily Dioxins; There are some researches show that the subzero treatment method has preferably treatment effect for the PCBs of lower concentration, but the PCBs of processing high density performs poor then.Method of chemical treatment is exactly under certain condition, reacts with other reagent and PCBs, makes it dechlorination and generates biphenol compound or other nontoxic, low toxicity materials.The method of chemical treatment operational means is varied, so be of wide application, but method of chemical treatment exists complex process, shortcoming that processing efficiency is low, and if some chemical treatment methods control the improper secondary pollution that is easy to produce.Compare with thermal treatment and chemical treatment, photodegradation and biological treatment are more green and safe processing means.The cardinal principle of photodegradation polychlorobiphenyl is dechlorination reaction, so need further to process through photodegradative degraded product.The biological treatment processing costs is low, can thoroughly clear the pollution off, and can not cause secondary pollution to environment, but refuse and the degradation speed of the lower concentration of can only degrading are slow.
Summary of the invention
The present invention is directed to the blank that the Field of Groundwater Study pollution by polychlorinated biphenyles is repaired, in conjunction with advanced photodegradation and biologic treating technique, overcome other restorative procedure cost height, complex process, difficult control, the shortcoming such as secondary pollution has been arranged, photodegradative transitory efficient and biodegradable low-consumption high-efficiency are combined, and providing a kind of is a kind of have environmental protection, efficient energy-saving, economic advanced reparation means.
A kind of device based on polychlorobiphenyl in the UV oxidation photodissociation reparation underground water, its underground water collection device, photodissociation treatment unit, transmission pump, biological treatment device, proofing unit link to each other in turn with backflow device; Wherein underground water collection device, photodissociation treatment unit are arranged in the suction well, and transmission pump, biological treatment device, proofing unit and backflow device are arranged on the earth's surface; The photodissociation treatment unit links to each other with the control device that it is arranged on the earth's surface respectively with biological treatment device.
Light source is ultraviolet source in the described photodissociation treatment unit, and the quantity of light source is a plurality of, and arrangement mode is that the multilayer ring-type is evenly distributed.
The absorption spectrum of the UV-light that described ultraviolet source sends is 200 nm ~ 275 nm.
A kind of method of repairing polychlorobiphenyl in the underground water based on UV oxidation photodissociation, its concrete steps are as follows:
A. by field investigation in conjunction with the simulative optimization means, obtain underground water collection device, transmission pipeline, suction well, transmission pump position, the underground water collection device connect transmission pipeline with Groundwater Control in several suction well aspiration ranges;
B. control absorption spectrum and the photodissociation duration of UV-light by the control device of earth's surface photodissociation treatment unit, the underground water that pollutes is carried out photodissociation process;
C. will pump into through the underground water of photodissociation in the geodyte treatment unit, underground water will be further processed;
D. by proofing unit treated underground water is detected, determine that polychlorobiphenyl is effectively removed;
E. the underground water that will process recharges underground by backflow device.
The light source of photodissociation treatment unit is ultraviolet source among the described step a, and the light source number is a plurality of, and arrangement mode is that the multilayer ring-type is evenly distributed.
Described step b medium ultraviolet Optical Absorption frequency spectrum is 200 nm ~ 275 nm, and the photodissociation duration is 40 s ~ 5 min.
Beneficial effect of the present invention is:
1. the photodissociation reparation is that master, other reparation means (biological means) are auxiliary, has greatly improved range of application and working efficiency that polychlorobiphenyl is repaired.Whole repair process is smooth, and compact equipment is simple to operate, and reliability is high.
2. the photodissociation repair process carries out in the suction well, belongs to the original position reparation, and is little to the ecotope disturbance, prevents that effectively volatile contaminant is diffused in other environment support.
3. effluent quality is good, and the polychlorobiphenyl clearance is more than 90%, and each main contamination index all reaches national sewage comprehensive discharge primary standard.
4. overcome other restorative procedure cost height, complex process, difficult control, the shortcoming such as secondary pollution is arranged, and repairing efficiency is shorter.Compare with domestic and international similar Pollutant Treatment technology, process range enlarges 50%～75%; Reaching under the prerequisite of equal regulation effect, it is about 25%～45% that this technology is reduced investment outlay, and saves maintenance and management cost 40%～50%; In identical resource input situation, screening system optimized operation scheme reaches optimal effectiveness, and the row freight charges are 60%～75% of similar technology.
Description of drawings
Fig. 1 is apparatus of the present invention structural representation;
Fig. 2 is that the present invention aspirates the well schematic perspective view;
Number in the figure: 1-underground water collection device; 2-photodissociation treatment unit; The 3-transmission pump; The 4-biological treatment device; The 5-proofing unit; The 6-backflow device; 7-aspirates well; The 9-Polluted area
Embodiment
The invention provides a kind of device and method based on polychlorobiphenyl in the UV oxidation photodissociation reparation underground water, the present invention will be further described below in conjunction with the drawings and specific embodiments.
A kind of device based on polychlorobiphenyl in the UV oxidation photodissociation reparation underground water, its underground water collection device 1, photodissociation treatment unit 2, transmission pump 3, biological treatment device 4, proofing unit 5 and backflow device 6 link to each other in turn; Wherein underground water collection device 1, photodissociation treatment unit 2 are arranged in the suction well 7, and transmission pump 3, biological treatment device 4, proofing unit 5 and backflow device 6 are arranged on the earth's surface; Photodissociation treatment unit 2 links to each other with the control device that it is arranged on the earth's surface respectively with biological treatment device 4.
Light source is ultraviolet source in the described photodissociation treatment unit 2, and the quantity of light source is a plurality of, and arrangement mode is that the multilayer ring-type is evenly distributed.
The absorption spectrum of the UV-light that described ultraviolet source sends is 200 nm ~ 275 nm.
A kind of method of repairing polychlorobiphenyl in the underground water based on UV oxidation photodissociation, its concrete steps are as follows:
A. by field investigation in conjunction with the simulative optimization means, obtain underground water collection device, transmission pipeline, suction well, transmission pump position, the underground water collection device connect transmission pipeline with Groundwater Control in several suction well aspiration ranges;
B. control absorption spectrum and the photodissociation duration of UV-light by the control device of earth's surface photodissociation treatment unit, the underground water that pollutes is carried out photodissociation process;
C. will pump into through the underground water of photodissociation in the geodyte treatment unit, underground water will be further processed;
D. by proofing unit treated underground water is detected, determine that polychlorobiphenyl is effectively removed;
E. the underground water that will process recharges underground by backflow device.
The light source of photodissociation treatment unit is ultraviolet source among the described step a, and the light source number is a plurality of, and arrangement mode is that the multilayer ring-type is evenly distributed.
Described step b medium ultraviolet Optical Absorption frequency spectrum is 200 nm ~ 275 nm, and the photodissociation duration is 40 s ~ 5 min.
Apparatus of the present invention operational scheme as shown in Figure 1, at first by underground water collection device 1 with Groundwater Control in process range, and carry out photodissociation and process by being arranged on photodissociation treatment unit 2 in the suction well 7 and surface control device thereof; Then by transmission pump 3 the underground water extracting is further processed in biological treatment device 4; The at last water outlet by 5 pairs of systems of proofing unit detects, and the underground water of processing after up to standard recharges underground by backflow device 6.
The method photodissociation reparation is that master, other reparation means (biological means) they are auxiliary, the prosthetic appliance compact construction, and flow process understands that simple to operate, reliability is high.Not only improved greatly the polychlorobiphenyl repair coverage, higher working efficiency and pollutants removal rate have also been arranged.Effluent quality is good, and the polychlorobiphenyl clearance is more than 90%, and each main contamination index all reaches national sewage comprehensive discharge primary standard.Repair process environmental protection, energy-saving and emission-reduction,, non-secondary pollution little to ecological disturbance.Compare with domestic and international similar Pollutant Treatment technology, process range enlarges 50%～75%; Reaching under the prerequisite of equal regulation effect, it is about 25%～45% that this technology is reduced investment outlay, and saves maintenance and management cost 40%～50%; In identical resource input situation, screening system optimized operation scheme reaches optimal effectiveness, and the row freight charges are 60%～75% of similar technology.
Claims (6)
1. repair the device of polychlorobiphenyl in the underground water based on UV oxidation photodissociation for one kind, it is characterized in that: underground water collection device (1), photodissociation treatment unit (2), transmission pump (3), biological treatment device (4), proofing unit (5) and backflow device (6) link to each other in turn; Wherein underground water collection device (1), photodissociation treatment unit (2) are arranged in the suction well (7), and transmission pump (3), biological treatment device (4), proofing unit (5) and backflow device (6) are arranged on the earth's surface; Photodissociation treatment unit (2) links to each other with the control device that it is arranged on the earth's surface respectively with biological treatment device (4).
2. device according to claim 1 is characterized in that: light source is ultraviolet source in the described photodissociation treatment unit (2), and the quantity of light source is a plurality of, and arrangement mode is that the multilayer ring-type is evenly distributed.
3. device according to claim 2, it is characterized in that: the absorption spectrum of the UV-light that described ultraviolet source sends is 200 nm ~ 275 nm.
4. method of repairing polychlorobiphenyl in the underground water based on UV oxidation photodissociation is characterized in that concrete steps are as follows:
A. by field investigation in conjunction with the simulative optimization means, obtain underground water collection device, transmission pipeline, suction well, transmission pump position, the underground water collection device connect transmission pipeline with Groundwater Control in several suction well aspiration ranges;
B. control absorption spectrum and the photodissociation duration of UV-light by the control device of earth's surface photodissociation treatment unit, the underground water that pollutes is carried out photodissociation process;
C. will pump into through the underground water of photodissociation in the geodyte treatment unit, underground water will be further processed;
D. by proofing unit treated underground water is detected, determine that polychlorobiphenyl is effectively removed;
E. the underground water that will process recharges underground by backflow device.
5. method according to claim 4, it is characterized in that: the light source of photodissociation treatment unit is ultraviolet source among the described step a, and the light source number is a plurality of, and arrangement mode is that the multilayer ring-type is evenly distributed.
6. method according to claim 4, it is characterized in that: described step b medium ultraviolet Optical Absorption frequency spectrum is 200 nm ~ 275 nm, and the photodissociation duration is 40 s ~ 5 min.
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| CN201210585735.6A CN103058456B (en) | 2012-12-28 | 2012-12-28 | Device and method for UV oxidation photolysis-based restoration of polychlorinated biphenyl-polluted underground water |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103252342A (en) * | 2013-05-10 | 2013-08-21 | 华北电力大学 | Electrodynamic force ultraviolet photolysis in-situ repair device and repair method thereof |
| CN103288168A (en) * | 2013-06-27 | 2013-09-11 | 华北电力大学 | Multiphase vacuum suction and reinforced ultraviolet catalytic photolysis repair system and repair method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102241451A (en) * | 2011-04-08 | 2011-11-16 | 哈尔滨工业大学 | Degradation method for halogenated disinfection by-products |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102241451A (en) * | 2011-04-08 | 2011-11-16 | 哈尔滨工业大学 | Degradation method for halogenated disinfection by-products |
Non-Patent Citations (1)
| Title |
|---|
| 王海棠等: "紫外光照射与生物降解耦合用于PCBs降解的研究", 《环境污染治理技术与设备》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103252342A (en) * | 2013-05-10 | 2013-08-21 | 华北电力大学 | Electrodynamic force ultraviolet photolysis in-situ repair device and repair method thereof |
| CN103252342B (en) * | 2013-05-10 | 2015-04-15 | 华北电力大学 | Electrodynamic force ultraviolet photolysis in-situ repair device and repair method thereof |
| CN103288168A (en) * | 2013-06-27 | 2013-09-11 | 华北电力大学 | Multiphase vacuum suction and reinforced ultraviolet catalytic photolysis repair system and repair method thereof |
| CN103288168B (en) * | 2013-06-27 | 2015-06-10 | 华北电力大学 | Multiphase vacuum suction and reinforced ultraviolet catalytic photolysis repair system and repair method thereof |
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