CN101439894B - Photocatalysis and biotreatment combined drinking water treatment method - Google Patents
Photocatalysis and biotreatment combined drinking water treatment method Download PDFInfo
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- CN101439894B CN101439894B CN200810209848XA CN200810209848A CN101439894B CN 101439894 B CN101439894 B CN 101439894B CN 200810209848X A CN200810209848X A CN 200810209848XA CN 200810209848 A CN200810209848 A CN 200810209848A CN 101439894 B CN101439894 B CN 101439894B
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Abstract
The invention relates to a photocatalysis and biological treatment combined drinking water treatment method. The invention relates to a water treatment method. The invention solves the problems that a photocatalysis water treatment method has high cost, difficult degradation, low efficiency of biological organic matter degradation and bad effects of removing ammonia nitrogen; and the microbe content in the water treated by a biological method is incapable of reaching standards. The method comprises the following steps: 1, introducing raw water into a photocatalytic reactor for carrying out a photocatalytic reaction; 2, carrying out the biological treatment of the water processed in step 1; and returning the outputted water after the biological treatment to the photocatalytic reactor for sterilization, and realizing the treatment of the raw water. The water treatment technology combining the photocatalysis and biological treatment has low cost and high water treatment efficiency. The microbe content in the treated water meets the drinking water sanitary standards. The method is suitable for the treatment of drinking water.
Description
Technical field
The present invention relates to a kind of water treatment method.
Background technology
Photocatalytic method is a kind of very promising water treatment new technology, because it can utilize sunlight or UV-light that multiple pollutent is had tangible degradation effect, thereby has broad application prospects.Photocatalysis technology uses semiconductor material as catalyzer, when the illumination that is equivalent to the semi-conductor energy gap when energy is mapped to catalyst surface, will transit to conduction band from valence band by the interior electronics of vitalizing semiconductor, formation has very strong active electron-hole pair, the carrying out of a series of redox reactions of an one-step inducing of going forward side by side, thus reach the purpose of removing pollution substance, still, the cost height of present photocatalysis technology water treatment method, and photocatalysis method is for the ammonia nitrogen removal weak effect in the water.Biological process is as a kind of economical rationality, effective water pollution control means, aspect water treatment, play an important role, especially the removal effect to the ammonia nitrogen in the tap water is obvious, but it is limited for the Pollutant Treatment effect that some biodegradabilities are lower, and adopt the biological process processing drinking water, the problem that the water outlet microbiological indicator exceeds standard can occur.
Summary of the invention
The present invention is for problem that solves photocatalytic treatment method cost height, ammonia nitrogen removal weak effect and the problem that the biological process water treatment efficiency is low, the water outlet microbiological indicator exceeds standard, and the drinking water treatment method of a kind of photochemical catalysis and biological coupling is provided.
The drinking water treatment method of photochemical catalysis of the present invention and biological coupling carries out according to the following steps: one, former water water is pumped in the photo catalysis reactor, then photocatalyst is added uniform mixing in the photo catalysis reactor, control photo catalysis reactor pH value is 2～12, hydraulic detention time is 10min～480min, and the intensity of light source is 0.1～20mW/cm
2, the membrane module through photo catalysis reactor filters then, and wherein, the add-on of photocatalyst is to drop into the photocatalyst of 0.1～5g in the volume of every liter of photo catalysis reactor; Two, the water outlet of photo catalysis reactor enters in the biological filter, and through media filtration, control biological filter filtering velocity is 1～20m/h; Three, the water outlet of step 2 is back to from top carries out photo-catalyst the photo catalysis reactor, the control hydraulic detention time is 5min～480min, and the upper membrane assembly through photo catalysis reactor filters the suction water outlet then, has promptly realized the processing of former water.
Method of the present invention is coupled photocatalysis technology and biotechnology, earlier former water is carried out photocatalytic degradation in photo catalysis reactor, utilize photocatalysis oxidation reaction to improve the biodegradability of target compound, again that biodegradability is high water outlet is put into the biological filter and is carried out a biological disposal upon, the carrying out that helps biological treatment improved the efficient of biological treatment.The problem of high ammonia nitrogen is serious day by day in surface water, but photocatalysis technology is to the poor removal effect of ammonia nitrogen in the water, and biologic treating technique is fine to the removal effect of ammonia nitrogen in the water, so, biologic treating technique is as the subsequent treatment process of photocatalysis technology, except the organism in can disposing of sewage better, the ammonia nitrogen in can also disposing of sewage has further improved the efficient of water treatment.Water outlet after the biological treatment enters into photo catalysis reactor, has effectively utilized the germ-resistant function of photocatalysis technology in the photo catalysis reactor, has solved the problem of the water microorganism index exceeding standard after the biological treatment.
Method of the present invention is compared with the photochemical catalysis water treating method, and photocatalysis technology can not effectively be removed the ammonia nitrogen in the water, and the ammonia nitrogen removal frank in the method treating water of the present invention is more than 95%, and is effective to the ammonia nitrogen removal in the water; Method of the present invention and independent photochemical catalysis water treating method and the independent biological water treating method UV in the water that compares
254Clearance reach more than 90%, the clearance of TOC reaches more than 80%, the water treatment efficiency height.The present invention through biological treatment after, be back in the photo catalysis reactor and sterilize by photocatalysis technology, effectively remove microorganisms such as bacterium, make the Drinking Water after the processing meet drinking water sanitary standard.
Biological treatment of the present invention can alleviate the load of photocatalytic degradation reaction as the subsequent disposal unit of photocatalytic-oxidation metallization processes, and then reduce the hydraulic detention time of photocatalytic-oxidation metallization processes, reduce the catalyzed reaction time, reduced the cost of water treatment, improved processing efficiency.
Description of drawings
The setting drawing that Fig. 1 combines with the biological filter according to embodiment 12 photocatalysis membrana separate reactors, wherein 1 is photo catalysis reactor, 2 is the biological filter, 3 is the photo catalysis reactor light source, 4 is photocatalyst, and 5 is photo catalysis reactor bottom film assembly, and 6 is biofilter material, 7 photo catalysis reactor top-film assemblies, the direction of arrow are water mobile direction.
Embodiment
Embodiment one: the drinking water treatment method of present embodiment photochemical catalysis and biological coupling carries out according to the following steps: one, with water pump former water is pressed in the photo catalysis reactor, then photocatalyst is added uniform mixing in the photo catalysis reactor, control photo catalysis reactor pH value is 2～12, hydraulic detention time is 10min～480min, and the intensity of light source is 0.1～20mW/cm
2, wherein, the add-on of photocatalyst is to drop into the photocatalyst of 0.1～5g in every liter of photo catalysis reactor volume; Two, the lower film assembly of the former water process photo catalysis reactor after the photocatalysis treatment filters to enter in the biological filter and carries out a biological disposal upon, and control biological filter filtering velocity is 1～20m/h, through water outlet behind the media filtration of biological filter; Three, the water outlet of step 2 is back to from top carries out photo-catalyst the photo catalysis reactor, the control hydraulic detention time is 5min～480min, and the upper membrane assembly through photo catalysis reactor filters the suction water outlet then, has promptly realized the processing of former water.
Present embodiment simulation surface water is former water, and former water is humic acid and NH
4The Cl water distribution, raw water quality UV
254Be 0.23cm
-1, TOC is 7.5mg/L, ammonia nitrogen is 5mg/L.UV after present embodiment is handled
254Clearance reaches more than 90%, and the TOC clearance reaches more than 80%, and ammonia nitrogen removal frank reaches more than 94%, and the removal of microorganisms rate reaches more than 97%.
Embodiment two: what present embodiment and embodiment one were different is that photo catalysis reactor pH value is 4～10 in the step 1.Other step and parameter are identical with embodiment one.
Embodiment three: what present embodiment and embodiment one were different is that the photo catalysis reactor hydraulic detention time is 15min～360min in the step 1.Other step and parameter are identical with embodiment one or two.
Embodiment four: present embodiment and embodiment one are different is that photocatalyst in the step 1 is TiO
2Powder.Other step and parameter are identical with embodiment three.
Embodiment five: present embodiment and embodiment one are different is the photocatalyst that adds 0.2～4g in the volume of every liter of reactor in the step 1.Other step and parameter are identical with embodiment one, two or four.
Embodiment six: what present embodiment and embodiment one were different is that light source adopts ultraviolet source in the step 1, and the intensity of light source is 1～18mW/cm
2Other step and parameter are identical with embodiment five.
Embodiment seven: present embodiment and embodiment one are different is that film in the step 1 is microfiltration membrane, ultra-filtration membrane or nanofiltration membrane.Other step and parameter are identical with embodiment one, two, four or six.
Embodiment eight: what present embodiment and embodiment one were different is that filtrate is gac, haydite, quartz sand, zeolite, plastic filler or fibrous nodules in the step 2.Other step and parameter are identical with embodiment seven.
Embodiment nine: present embodiment and embodiment one are different is that the filtering velocity of biological filter in the step 2 is 2～18m/h.Other step and parameter are identical with embodiment one, two, four, six or eight.
Embodiment ten: present embodiment and embodiment one are different is that the membrane module of photo catalysis reactor in the step 3 is microfiltration membrane, ultra-filtration membrane or nanofiltration membrane.Other step and parameter are identical with embodiment nine.
Embodiment 11: the drinking water treatment method of present embodiment photochemical catalysis and biological coupling carries out according to the following steps: one, with water pump former water is pressed in the photo catalysis reactor, then photocatalyst is added uniform mixing in the photo catalysis reactor, control photo catalysis reactor pH value is 7, hydraulic detention time is 15min, and the intensity of light source is 1.5mW/cm
2Wherein, the add-on of photocatalyst is to drop into the photocatalyst of 1.5g in every liter of photo catalysis reactor volume; Two, the lower film assembly of the former water process photo catalysis reactor after the photocatalysis treatment filters to enter in the biological filter and carries out a biological disposal upon, and control biological filter filtering velocity is 3m/h, through water outlet behind the media filtration of biological filter; Three, the water outlet of step 2 is back to from top carries out photo-catalyst the photo catalysis reactor, the control hydraulic detention time is 15min, and the upper membrane assembly through photo catalysis reactor filters the suction water outlet then, has promptly realized the processing of former water.
Present embodiment simulation surface water is former water, and former water is humic acid and NH
4The Cl water distribution, raw water quality UV
254Be 0.23cm
-1, TOC is 7.5mg/L, ammonia nitrogen is 5mg/L.UV after present embodiment is handled
254Clearance is 97%, and the TOC clearance is 88%, and ammonia nitrogen removal frank is 98%.
Embodiment 12: the drinking water treatment method that present embodiment photochemical catalysis and biological coupling are described in conjunction with Fig. 1 carries out according to the following steps: one, with water pump former water is pressed in the photo catalysis reactor 1, then photocatalyst 4 is added uniform mixing in the photo catalysis reactor, control photo catalysis reactor 1pH value is 7, hydraulic detention time is 18min, and light source 3 intensity are 1.6mW/cm
2, wherein, the add-on of photocatalyst is to drop into the photocatalyst of 2g in every liter of photo catalysis reactor volume; Two, lower film 5 assemblies of the former water process photo catalysis reactor after the photocatalysis treatment filter to enter in the biological filter 2 and carry out a biological disposal upon, and control biological filter 2 filtering velocitys are 2.5m/h, water outlet after biological filter filtrate 6 filters; Three, the water outlet with step 2 is back to the photo catalysis reactor 1 from top, and light source 3 times, hydraulic detention time is to carry out sterilization under the condition of 30min, and the upper membrane assembly 7 through photo catalysis reactor 1 filters the suction water outlets then, has promptly realized the processing of former water.
Sterilize from top all is back to photo catalysis reactor the step 1 through the water outlet after the biological treatment in the present embodiment step 2.
Present embodiment simulation surface water is former water, and former water is humic acid and NH
4The Cl water distribution, raw water quality UV
254Be 0.23cm
-1, TOC is 7.5mg/L, ammonia nitrogen is 5mg/L.UV after present embodiment is handled
254Clearance is 96%, and the TOC clearance is 87%, and ammonia nitrogen removal frank is 99%.
Under the identical situation of photochemical catalysis water technology, the drinking water treatment method and the photocatalytic treatment method of photochemical catalysis of the present invention and biological coupling compare test.First group is the drinking water treatment method of photochemical catalysis of the present invention and biological coupling, and the pH value is 7 in photo catalysis reactor, hydraulic detention time 15min, TiO in every liter of reactor
2Input amount be 1g, light source adopts UV-light, wavelength is 254nm, ultraviolet lamp power is 40W, the intensity of light source is 1mW/cm
2Filtrate is a zeolite in the biological filter, and the biological filter filtering velocity is 2m/h, kills the catalysis bacterium in photo catalysis reactor off, and sterilising conditions is hydraulic detention time 15min; Second group is adopted the photochemical catalysis water technology separately, and the pH value is 7, treatment time of water 15min, TiO in every liter of reactor
2Input amount be 1g, light source adopts UV-light, wavelength is 254nm, ultraviolet lamp power is 40W, the intensity of light source is 1mW/cm
2This comparative test result of two groups is as shown in table 1, and the data from table 1 are the UV of the former water in the inventive method processing back as can be seen
254Clearance is 97%, and the TOC clearance is 86%, and ammonia nitrogen removal frank is 98%, and the inventive method is good for the treatment effect of former water, has improved the removal effect to organism and ammonia nitrogen greatly, has improved the efficient of sewage disposal.
Table 1
Under the identical situation of biological water technology technology, the drinking water treatment method of photochemical catalysis of the present invention and biological coupling and biological water treatment method compare test, wherein first group is the drinking water treatment method of photochemical catalysis of the present invention and biological coupling, the pH value is 7 in photo catalysis reactor, hydraulic detention time 15min, TiO in every liter of reactor
2Input amount be 1g, light source adopts UV-light, wavelength is 254nm, ultraviolet lamp power is 40W, the intensity of light source is 1mW/cm
2Filtrate is a zeolite in the biological filter, and the biological filter filtering velocity is 2m/h, carries out photo-catalyst in photo catalysis reactor, and sterilising conditions is hydraulic detention time 15min; Second group is biological water treatment method, and filtrate is a zeolite in the biological filter, and the biological filter filtering velocity is 2m/h; The result of these two groups tests is as shown in table 2, and the data from table 2 are the UV of the former water in the inventive method processing back as can be seen
254Clearance is 97%, the TOC clearance is 85%, ammonia nitrogen removal frank is 98%, the removal of microorganisms rate is 98%, method of the present invention is compared with biological water technology and has been improved treatment of organic matters of organic efficient height, and the present invention sterilizes by photocatalysis technology, effectively removes microorganisms such as bacterium, has solved the problem of the water microorganism index exceeding standard after the biological treatment.
Table 2
The drinking water treatment method and the photocatalytic treatment method of photochemical catalysis of the present invention and biological coupling compare test, the drinking water treatment method of first group of photochemical catalysis of the present invention and biological coupling wherein, the pH value is 7 in photo catalysis reactor, hydraulic detention time 15min, TiO in every liter of reactor
2Input amount be 1g, light source adopts UV-light, wavelength is 254nm, ultraviolet lamp power is 40W, the intensity of light source is 1mW/cm
2Filtrate is a zeolite in the biological filter, and the biological filter filtering velocity is 2m/h, carries out photo-catalyst in photo catalysis reactor, and sterilising conditions is hydraulic detention time 15min; Second group of photocatalytic treatment method, the pH value is 7 in photo catalysis reactor, hydraulic detention time 75min, TiO in every liter of reactor
2Input amount be 1g, light source adopts UV-light, wavelength is 254nm, ultraviolet lamp power is 40W, light intensity is 1mW/cm
2Comparative test result is as shown in table 3, and the data from table 3 are the UV of the former water in the inventive method processing back as can be seen
254Clearance is 98%, the TOC clearance is 87%, ammonia nitrogen removal frank is 98%, and the water treatment method of photochemical catalysis of the present invention and biological treatment is effective, the efficient height of water treatment, and biological treatment of the present invention is as the subsequent disposal unit of photocatalytic-oxidation metallization processes, can reduce the load of photocatalytic degradation reaction, and then reduce the hydraulic detention time of photocatalytic-oxidation metallization processes, reduce the catalyzed reaction time, reduced the cost of water treatment, also improved removal effect simultaneously organism and ammonia nitrogen.
Table 3
Claims (10)
1. the drinking water treatment method of a photochemical catalysis and biological coupling, the drinking water treatment method that it is characterized in that photochemical catalysis and biological coupling carries out according to the following steps: one, with water pump former water is pressed in the photo catalysis reactor, then photocatalyst is added uniform mixing in the photo catalysis reactor, control photo catalysis reactor pH value is 2～12, hydraulic detention time is 10min～480min, and the intensity of light source is 0.1～20mW/cm
2, wherein, the add-on of photocatalyst is to drop into the photocatalyst of 0.1～5g in every liter of photo catalysis reactor volume; Two, the lower film assembly of the former water process photo catalysis reactor after the photocatalysis treatment filters to enter in the biological filter and carries out a biological disposal upon, and control biological filter filtering velocity is 1～20m/h, through water outlet behind the media filtration of biological filter; Three, the water outlet of step 2 is back to from top carries out photo-catalyst the photo catalysis reactor, the control hydraulic detention time is 5min～480min, and the upper membrane assembly through photo catalysis reactor filters the suction water outlet then, has promptly realized the processing of former water.
2. the drinking water treatment method of a kind of photochemical catalysis according to claim 1 and biological coupling is characterized in that photo catalysis reactor pH value is 4～10 in the step 1.
3. the drinking water treatment method of a kind of photochemical catalysis according to claim 1 and 2 and biological coupling is characterized in that the photo catalysis reactor hydraulic detention time is 15min～360min in the step 1.
4. the drinking water treatment method of a kind of photochemical catalysis according to claim 3 and biological coupling is characterized in that the photocatalyst in the step 1 is TiO
2Powder.
5. according to the drinking water treatment method of claim 1,2 or 4 described a kind of photochemical catalysis and biological coupling, it is characterized in that dropping in the volume of every liter of photo catalysis reactor in the step 1 photocatalyst of 0.2～4g.
6. the drinking water treatment method of a kind of photochemical catalysis according to claim 5 and biological coupling is characterized in that light source adopts ultraviolet source in the step 1, and the intensity of light source is 1～18mW/cm
2
7. according to the drinking water treatment method of claim 1,2,4 or 6 described a kind of photochemical catalysis and biological coupling, the lower film assembly that it is characterized in that photo catalysis reactor in the step 1 is microfiltration membrane, ultra-filtration membrane or nanofiltration membrane.
8. the drinking water treatment method of a kind of photochemical catalysis according to claim 7 and biological coupling is characterized in that filtrate is gac, haydite, quartz sand, zeolite, plastic filler or fibrous nodules in the step 2.
9. according to the drinking water treatment method of claim 1,2,4,6 or 8 described a kind of photochemical catalysis and biological coupling, it is characterized in that the biological filter filtering velocity is 2～18m/h in the step 2.
10. the drinking water treatment method of a kind of photochemical catalysis according to claim 9 and biological coupling, the upper membrane assembly that it is characterized in that photo catalysis reactor in the step 3 is microfiltration membrane, ultra-filtration membrane or nanofiltration membrane.
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| CN102616992B (en) * | 2012-03-29 | 2013-12-11 | 南京大学 | Method for removing antibiotics resistance genes in waste water |
| CN102976534A (en) * | 2012-11-16 | 2013-03-20 | 山东建筑大学 | Method and device of killing staphylococcus aureus in sewage |
| CN103319055B (en) * | 2013-07-17 | 2014-11-05 | 环境保护部南京环境科学研究所 | Processing device for removing phenol and naphthalene in sewage and method thereof |
| CN103979745A (en) * | 2014-06-03 | 2014-08-13 | 江苏羊城净水设备有限公司 | Muddy water treater |
| CN104211253A (en) * | 2014-08-26 | 2014-12-17 | 常州大学 | Biomembrane-photocatalysis device for substances containing nitrogen in micropollution water body |
| CN104773886B (en) * | 2015-03-27 | 2017-06-20 | 北京工业大学 | A kind of method that optically catalytic TiO 2 oxidation removes dissolved organic matter in drinking water with ultrafiltration group technology |
| CN104860485B (en) * | 2015-05-29 | 2017-08-11 | 北京工业大学 | A kind of process for purifying water of ultraviolet light/titanium dioxide oxidation-biologic active carbon filtration |
| CN104891658B (en) * | 2015-06-05 | 2017-07-18 | 温州大学 | A kind of bacteria filter device for sewage disposal |
| CN105016546B (en) * | 2015-07-15 | 2017-02-01 | 赣州中联环保科技开发有限公司 | Electroplating wastewater treatment system and method |
| CN107487967B (en) * | 2017-10-09 | 2020-07-07 | 盐城工学院 | Sewage treatment method combining photocatalysis and biology |
| CN113754152A (en) * | 2021-03-01 | 2021-12-07 | 上海大学 | Device and method for treating chemical salt-containing wastewater |
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| CN101182086A (en) * | 2007-10-26 | 2008-05-21 | 上海大学 | Highly effective sewage combined treating method and device |
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| CN101182086A (en) * | 2007-10-26 | 2008-05-21 | 上海大学 | Highly effective sewage combined treating method and device |
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