CN105366760A - Method for treating algae-containing polluted water in immersive ultraviolet light contact mode - Google Patents
Method for treating algae-containing polluted water in immersive ultraviolet light contact mode Download PDFInfo
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- CN105366760A CN105366760A CN201510174300.6A CN201510174300A CN105366760A CN 105366760 A CN105366760 A CN 105366760A CN 201510174300 A CN201510174300 A CN 201510174300A CN 105366760 A CN105366760 A CN 105366760A
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Abstract
The invention relates to a method for treating algae-containing polluted water in an immersive ultraviolet light contact mode, namely, a method for treating algae-containing polluted water and low-concentration algal toxins difficult to remove, in particular to an ultraviolet light irradiation treatment method for removing trace algal toxins (>1 lug/L) in water, and belongs to the field of biologically-polluted water control and treatment and the field of water treatment technologies and environment protection technologies. The method is suitable for treating algae-containing water source water, water in water plants, lake water and river water. As proven by the experimental process, by adopting the method for treatment, most of algae cells and algal toxins in water can be removed under certain conditions, and standard requirements (MCs<1 ug/L) can be met, wherein according to the conditions, the temperature is 25 DEG C which is a room temperature, the barometric pressure is 1, the power of an ultraviolet light tube is 40-60 w, the wave length of ultraviolet light is 185 nm, the algae cell concentration (OD685) of algae-containing water is 0.5-2, the concentration of microcystic toxins is 1.0-5.0 ug, and the optimum irradiation time is 20-120 min.
Description
Technical field
The present invention relates to the method for a kind of immerseable ultraviolet light exposure process containing algae pollution water, belong to biological pollution water management process field.
Background technology
Blue-green algae is extensively present in the poisons in freshwaters such as rivers and lakes, and the blue-green algae of hypertrophy creates tremendous influence to Water quality and human being's production life.When water temperature is at 25 ~ 35 DEG C, when the nutritive substances such as the nitrogen phosphorus in water body enrich, the speed of growth of blue-green algae will than the algae fast growth of other kind, and be the class that current toxin producing is maximum, as Microcystin (MCs.Microcystin particularly to harm one of great environmental problem becoming global concern of human health to environment, is subject to people and more and more pays close attention to.Cultivation object can be directly caused to be poisoned to death when cyanophycin amount is many, and by food chain build-up effect harm cultivation object, until harmful to human.Microcystic aeruginosa (
microcystisaeruginosa) occupy advantage algae kind with its quantity and content of toxins, after meta-bolites enters water body, human body and biology are worked the mischief.Tradition administers the method for blue-green alga bloom as added the algicide such as copper sulfate, or the physical method such as flocculation, is the emergency schedule after wawter bloom occurs mostly, instant effect but may cause secondary pollution and accelerate the release of Algae toxins in frustule body.Ultraviolet (UV) is as the higher short-wave radiation of a kind of energy, and C-band (UV-C, 200 ~ 280nm) is comparatively used for pollutant removal research, comprises water factory's sterilization and advanced treatment, and in the past in research, 254nm wavelength uses more.185nm length ultraviolet light photon energy ruptures most of chemical bond, and the resistates of generation is few, and the structural changes of disinfection byproduct (DBP) is few.Meanwhile, water and dissolved oxygen wherein under irradiation, produce superoxide anion (O
2 -), excite ground state oxygen molecule (O
2), hydrogen peroxide (H
2o
2), the excited state material that the oxidisability such as hydroxyl radical free radical (OH) are extremely strong, pollutant oxidation degraded in fortified water.Water has very strong absorption (absorption value when 25 DEG C is 1.80 ± 0.01) to it, 185nm UV-light effective range is μm scope about δ=300 greatly, so 185nm ultraviolet luminous energy produces strong photochemical reaction with algae in water and Algae toxins in the region and it is removed fast.UV-light and algae immersion enter in contact process, and (OH, H, O) induced damage of a large amount of Strong oxdiative group makes intracellular organic matter degrade.
Summary of the invention
The object of the invention is to solve the deficiency in removing lower concentration frustule and associated toxin in traditional water treatment method, to increase water quality purification efficiency, propose fast a kind of, effectively, the method of frustule and Algae toxins in thorough removal water body, the present invention is the method for biological pollution in a kind of advanced water treatment.
The process of a kind of immerseable ultraviolet light exposure of the present invention, containing the method for algae pollution water, is characterized in that having process and step:
Be placed on by the ultraviolet lamp tube of certain power and pending containing in the reactor of algae pollution water is housed, utilize the direct contact irradiation water pollutant of UV-light, the power of described ultraviolet lamp tube is 40-60w; The wavelength of UV-light is 185nm; Frustule concentration (OD
685for 1.0-5.0ug/L) be 0.5-2, Algae toxins concentration is 1.0-5.0ug/L; Best irradiation time is 20-120 minute.
The process of a kind of immerseable of the present invention ultraviolet light exposure is containing special purpose device used in the method for algae pollution water, and it is conventional common unit, includes: ultraviolet lamp tube, container interlayer, reaction vessel, wastewater inlet, sewage outlet; It is characterized in that: ultraviolet lamp tube is arranged at the central position of contact reacts container, ultraviolet lamp tube wavelength is 185nm, and reaction vessel container outer wall is provided with water-in and water outlet, ultraviolet lamp tube be immersed in contact reacts container containing in algae waste water; The bottom of container interlayer and top are respectively provided with water inlet pipe and rising pipe, pass into recirculated water with the temperature in regulation and control reactor.
Its result of the inventive method shows: 185nm UV-light is carrying out contact irradiation containing in algae pollution liquid to frustule, optical density(OD), chlorophyll a, soluble protein content finally decline 87.1%, 99.8% and 99.7% respectively, far above conventional distance is irradiated 39.5%, 51.8% and 34.8%, significantly improve the removal effect of each index.185nm UV-light makes the cellularstructure short period of time of microcystic aeruginosa impaired, in born of the same parents and the outer material of born of the same parents all produce noticeable change, frustule becomes deformity.Algae toxins concentration is under the low consistency conditions of 1.24ug/L, and within 20 minutes, be about to below 1ug/L, the final clearance of 120 minutes reaches 97.6%, far above conventional distance is irradiated 76.6%.
The inventive method utilizes UV-light to immerse containing in algae pollution water, and contact irradiates frustule, and its equipment running cost is low, and treatment effect is good, in the engineering adopting treatment with ultraviolet light Source water and drinking water, have larger application potential.
Accompanying drawing explanation
Fig. 1 is in the present invention compared with direct irradiation, and 185nmUV contact irradiation is to the removal of each growth indexes of frustule.
Fig. 2 be in the present invention 185nmUV contact irradiation to frustule structural damage.
Fig. 3 is in the present invention compared with direct irradiation, and 185nmUV contact irradiation is to the removal process of lower concentration Algae toxins.
Fig. 4 be in the present invention 185nmUV contact irradiation to the removal process of different concns Algae toxins
Fig. 5 is experiment immerseable UV curing apparatus figure in the present invention.
Embodiment
Now specific embodiments of the invention are described below (utilizing the immerseable UV curing apparatus as Fig. 1).
Embodiment
Process in the present embodiment and step as follows: the immerseable UV curing apparatus of Fig. 1 (utilize as)
A, finite concentration is placed in contact UV curing apparatus containing algae pollution water, namely in contact ultraviolet reactor, connects the ultraviolet source of 185nm, light source is in continuous duty, meanwhile, needs to be respectively 0 in the reaction times according to process, 10,20,30,60,90, frustule concentration and Algae toxins concentration is remained, to calculate the clearance to frustule and toxin in 120,150 minutes sampling and measuring water.
The lamp holder conduction of b, ultraviolet lamp is sentenced silica gel and is closed.
Recirculated water can be passed in interlayer to control reactor temperature in c, container.
D, by experiment process, show that certain power UV fluorescent tube is placed in lower concentration algae-containing water container carries out advanced treatment process, utilizes the Algae toxins of frustule and generation thereof in the direct contact irradiation water of UV-light, the power of ultraviolet lamp tube is 40-60w; The wavelength of UV-light is 185nm; Wherein frustule concentration (OD
685) be 0.5-2; Algae toxins concentration is 1.0-5.0ug/L; Irradiation time is 20-120 minute.
Analysis and inspection to the process of the test in embodiment or treating processes:
Fig. 1 to Fig. 4 is under single lamp action condition, and 185nm ultra-violet lamp immerses the removal effect of irradiating and containing to frustule and Algae toxins in algae pollution liquid.Optical density(OD), chlorophyll a, soluble protein content finally decline 87.1%, 99.8% and 99.7% respectively, far above conventional distance is irradiated 39.5%, 51.8% and 34.8%, significantly improve the removal effect of each index, cause cell damage comprehensively and substantially remove.Along with irradiation time increases, frustule structure deteriorate is serious, and born of the same parents inner core region is damaged, born of the same parents' ectoglia membrane diffusion.185nm UV-light makes the cellularstructure short period of time of microcystic aeruginosa impaired, in born of the same parents and the outer material of born of the same parents all produce noticeable change, frustule becomes deformity.Algae toxins concentration is 1.0-5.0ug/L; Best irradiation time is 20-120 minute, and wherein, when reaction 20min, namely clearance reaches 83.4%; The final clearance that 60min clearance reaches 96.8%, 120 minutes reaches 97.6%, far above conventional distance is irradiated 76.6%.
Claims (2)
1. ultraviolet light exposure process is containing a method for algae pollution water, it is characterized in that having following process and step:
Certain power UV fluorescent tube is placed on pending containing in the reactor of algae pollution water is housed, utilize the Algae toxins of frustule and generation thereof in the direct contact irradiation water of UV-light; The power of described ultraviolet lamp tube is 40-60w; The wavelength of UV-light is 185nm; Be applicable to the advanced treatment of lower concentration algae-containing water, wherein frustule concentration (OD
685) be 0.5-2; Algae toxins concentration is 1.0-5.0ug/L; Best irradiation time is 20-120 minute.
2. immerseable ultraviolet light exposure process is containing special purpose device used in the method for algae pollution water, it is conventional common unit, includes: ultraviolet lamp tube (1), container interlayer (2), reaction vessel (3), algae-containing water entrance (a), algae-containing water outlet (b); It is characterized in that: ultraviolet lamp tube (1) is arranged at the central position of contact reactor (3), ultraviolet lamp tube (1) wavelength is 185nm; Reaction vessel (3) container outer wall is provided with containing algae sewage inlet (a) with containing algae sewage outlet (b), and ultraviolet lamp tube (1) is immersed in the algae-containing water in contact reacts container (3); The bottom of container interlayer (2) and top are respectively provided with water inlet pipe (c) and rising pipe (d), pass into recirculated water with the temperature in regulation and control reactor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510174300.6A CN105366760A (en) | 2015-04-14 | 2015-04-14 | Method for treating algae-containing polluted water in immersive ultraviolet light contact mode |
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| CN201510174300.6A CN105366760A (en) | 2015-04-14 | 2015-04-14 | Method for treating algae-containing polluted water in immersive ultraviolet light contact mode |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111718045A (en) * | 2020-07-07 | 2020-09-29 | 清华大学 | Water body algae inhibiting method |
| CN115028233A (en) * | 2022-08-11 | 2022-09-09 | 清华大学 | Method for degrading microcystin in water |
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| US6332981B1 (en) * | 1999-12-16 | 2001-12-25 | Walter Thomas Loyd | Ultra violet liquid purification system |
| CN1587084A (en) * | 2004-09-18 | 2005-03-02 | 清华大学深圳研究生院 | Method and system for inhibiting blue-green algae gowth in water using ultraviolet radiation |
| CN2918394Y (en) * | 2005-12-28 | 2007-07-04 | 广州市恒兆环境生物工程有限公司 | Photoelectricity water quality cleaning equipment |
| CN201581003U (en) * | 2009-11-27 | 2010-09-15 | 复旦大学 | Device utilizing ultraviolet rays to remove pollution algae in water body |
| CN103121733A (en) * | 2013-02-27 | 2013-05-29 | 上海大学 | Method for degrading organic pollutants in water by immersion ultraviolet light exposure |
| KR20140131141A (en) * | 2013-05-03 | 2014-11-12 | 비엘프로세스(주) | Ultraviolet pretreatment device |
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2015
- 2015-04-14 CN CN201510174300.6A patent/CN105366760A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6332981B1 (en) * | 1999-12-16 | 2001-12-25 | Walter Thomas Loyd | Ultra violet liquid purification system |
| CN1587084A (en) * | 2004-09-18 | 2005-03-02 | 清华大学深圳研究生院 | Method and system for inhibiting blue-green algae gowth in water using ultraviolet radiation |
| CN2918394Y (en) * | 2005-12-28 | 2007-07-04 | 广州市恒兆环境生物工程有限公司 | Photoelectricity water quality cleaning equipment |
| CN201581003U (en) * | 2009-11-27 | 2010-09-15 | 复旦大学 | Device utilizing ultraviolet rays to remove pollution algae in water body |
| CN103121733A (en) * | 2013-02-27 | 2013-05-29 | 上海大学 | Method for degrading organic pollutants in water by immersion ultraviolet light exposure |
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Non-Patent Citations (1)
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| 刘书宇等: "185nm紫外光浸入式照射对铜绿微囊藻的去除", 《同济大学学报（自然科学版）》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111718045A (en) * | 2020-07-07 | 2020-09-29 | 清华大学 | Water body algae inhibiting method |
| CN115028233A (en) * | 2022-08-11 | 2022-09-09 | 清华大学 | Method for degrading microcystin in water |
| CN115028233B (en) * | 2022-08-11 | 2022-11-08 | 清华大学 | Method for degrading microcystin in water |
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