CN1446760A - Method for removing trace amount of organic matter by using ozone/ultraviolet-biological activity carbon - Google Patents
Method for removing trace amount of organic matter by using ozone/ultraviolet-biological activity carbon Download PDFInfo
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- CN1446760A CN1446760A CN 03122931 CN03122931A CN1446760A CN 1446760 A CN1446760 A CN 1446760A CN 03122931 CN03122931 CN 03122931 CN 03122931 A CN03122931 A CN 03122931A CN 1446760 A CN1446760 A CN 1446760A
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Abstract
A process for removing trace organic substance from water by ozone/ultraviolet ray-biologic activated carbon method features use of an ozone/ultraviolet ray unit and a biologic activated unit, and includes introducing the water to be treated and ozone to ozone/ultraviolet ray reactor containing ultraviolet lamp, mixing, flowing up, staying for 4-20 min to remove the convert the organic pollutant, flowing biologic activated carbon reactor, and staying for 10-80 min to degradate and remove the organic pollutant. Its advantage is high effect.
Description
Technical field
The invention belongs to water-treatment technology field, relate to a kind of ozone/ultraviolet technology is combined with biologic treating technique and be used for the method that water purifies, be particularly useful for the deep purifying of the water that polluted by micro-content organism, is a kind of feedwater and drink water production technology.
Background technology
Ozone/ultraviolet is not a new technology, and just be studied decades in the past, has been applied to the decolouring of the pulp bleaching effluent of paper industry at present, and the research aspect trade effluent and percolate from garbage filling field processing is quite a few.Ozone/ultraviolet method generally has two kinds of forms, and the one, the mixed phase system is about to ozone and is sparging in the water of uv-radiation; Another is the homogeneous phase system, promptly earlier with ozone solution in water, and then use ultraviolet radiation.Which kind of form no matter, ozone can decomposition and inversion be the stronger groups of oxidation susceptibility such as active oxygen and hydroxyl radical free radical under the radiation of UV-light, these groups can with the organic pollutant reaction in the water, the latter is degraded.Because ozone/ultraviolet need use ultraviolet lamp, and organism is thoroughly degraded need the long time, the cost of water treatment is very high, and therefore the range of application of ozone/ultraviolet is also very limited at present, is not applied in drinking water treatment.
On the other hand, the underwater micro-organic matter pollution problems is more and more outstanding, as disinfection byproduct (DBP) in the micro-natural organic matter that exists in the drinking water source and various poisonous and hazardous artificial synthetic organic materials, the tap water and the trace endocrine disrupter and the persistent organism that may exist, the insecurity that also runs into some micro quantity organic pollutants in the reusing sewage and constituted.Traditional water technology is difficult to effectively with organic matter removal micro-in the water as flocculation-sand filtration-sterilization method.Also begin ozone oxidation-biological activated carbon technology is applied to the processing of tap water the middle micro quantity organic pollutant of purifying waste water now.Yet, because ozone and organism react stronger selectivity is arranged, promptly very fast with some substance reaction, and very slow with some substance reaction, all organism of can not degrading very effectively; In addition, in the independent ozone oxidation unit, ozone is also not ideal to the mass transfer of water by gas phase, and ozone can not be dissolved in the water fully, causes the utilising efficiency of ozone not high.Consequently, in the ozone oxidation unit, removal effect of organic matter is not good, it is limited that the pollutent of difficult for biological degradation is converted into biodegradable ratio in the water, be unfavorable for subsequent biological treatment, promptly influence the treatment effect of follow-up biological activated carbon, cause whole ozone oxidation-BAC process desirable not to the utmost the removal efficient of micro-content organism.And adopt ozone/ultraviolet method to handle underwater micro-organic matter separately, and though can remove the organic pollutant in the water more up hill and dale, required treatment time of complete degradation of organic substances is very long, causes processing cost very high, its practical application is restricted.
Summary of the invention
The objective of the invention is that to remove in the water micro quantity organic pollutant efficient low in order to solve in the prior art, the problem that processing cost is high provides the especially method of micro-content organism of a kind of more effective removal water pollutant.
The invention provides a kind of ozone/ultraviolet-biological activated carbon and remove the method for underwater micro-organic matter, it is characterized in that this method mainly comprises following ozone/ultraviolet and two unit of biological activated carbon:
Pending water enters from the bottom of ozone/UV reactive device, and ozone gas feeds from the bottom of described reactor, and described ozone gas is through air distribution plate and water uniform mixing in the described reactor; The ultraviolet lamp of the built-in outer cover quartz socket tube of described reactor, water and the ozone gas reactor of upwards flowing through, the organic pollutant in the water was removed or transformed between 4～20min the residence time; Top water outlet from described reactor in the water after the preliminary treatment flows out, and ozone tail gas is discharged from the gas discharge outlet of described reactor;
Through the water of above-mentioned preliminary treatment a side inflow from the biological activated carbon reactor, the biological activated carbon layer that current are filled in described reactor, the residence time, organic pollutant was by biological degradation, removal in the water between 10～80min; Water after the processing flows out from described reactor opposite side.
Can determine according to the water quality objective of influent quality and water outlet at the ozone amount that ozone/the ultraviolet unit adds, between 0.5mg/L～10mg/L; Pending water is long more in the ozone/ultraviolet unit and the unitary residence time of biological activated carbon, and the ozone dosage is high more, and then the effect of water treatment is good more, and the water quality of handling back water is good more, but can increase processing cost.
The present invention organically combines ozone/ultraviolet and biological activated carbon technology, and is applied to the deep purifying of micro-polluted water.Advantage of the present invention is: (1) combines ozone/ultraviolet and biological activated carbon, the advantage of utilizing ozone/ultraviolet to be easy to change compound structure and improving biodegradable performance, and utilize the biological activated carbon technology can economical and effective to remove the advantage of biodegradable organic, thereby economical and efficient the pollutent in purifying waste water.Compare with independent ozone/ultraviolet treatment technology, this method is more economical.(2) compare with ozone-biological activated carbon method, ozone/ultraviolet of the present invention-biological activated carbon method has improved the mass transfer of ozone in water, and is higher to the removal efficient of organic pollutant.
Description of drawings
Fig. 1 is a process flow diagram of the present invention.
Embodiment
Will be further described below the mechanism of action of the present invention and specific embodiment:
The mechanism of action of the present invention is as follows: in ozone/ultraviolet unit, ozone is under the effect of UV-light, and the mass transfer in water is accelerated, and utilization ratio improves, and be converted into the stronger active group of oxidation capacity apace, the organic pollutant in the removal water of can degrading quickly.So in ozone/ultraviolet unit, organic pollutant can be degraded or remove quickly, simultaneously more a high proportion of material is converted into easily by biodegradable material, can also be significantly improved by biodegradability.And in the biological activated carbon unit, in the activated carbon surface microorganism that grown, current are when biological activated carbon, and the pollutent in the water is adsorbed by biological activated carbon and degrades.Those are converted to biodegradable organism and are removed in the biological activated carbon unit in ozone/ultraviolet unit.After ozone/ultraviolet and biological activated carbon combined, pending water made the pollutent in the water change into biodegradable material more, and does not need to degrade fully as long as carries out preliminary processing in ozone/ultraviolet unit.This shortens the treatment time of ozone/ultraviolet undoubtedly greatly, so can reduce the unitary processing cost of ozone/ultraviolet; Simultaneously, after water was handled through ozone/ultraviolet, the ratio of biodegradable organic improved in the water, is more suitable for biological activated carbon and handles, and the processing efficiency of biological activated carbon also improves.
Embodiment one: ozone/ultraviolet-biological activated carbon method purifies reservoir water.
As shown in Figure 1, reservoir water enters from the bottom of ozone/UV reactive device 100, and ozone gas feeds from the bottom of described reactor, and the ozone dosage is 3mg/L, and described ozone gas is through air distribution plate in the described reactor 103 and water uniform mixing; The ultraviolet lamp 101 of the built-in outer cover quartz socket tube 102 in the center of described reactor, water and the gas that the contains ozone reactor of upwards flowing through, the organic pollutant in the water was removed or transformed between 16min the residence time; Top water outlet 105 from described reactor in the water after the preliminary treatment flows out, and ozone tail gas is discharged from the gas discharge outlet 104 of described reactor;
Flow into through the water of above-mentioned preliminary treatment water-in 205 from biological activated carbon unitary reactor 200 1 sides, the biological activated carbon layer 201 that current are filled in reactor, the residence time is between 15min; Organic pollutant is by biological degradation, removal in the water, and the water after the processing flows out from described reactor opposite side water outlet 202.
According to the concentration and the processing requirements of water pollutant, can also be toward aeration in the biological activated carbon unit.The biological activated carbon unit is after running for some time, carry out back flushing to upgrade the surface of biological activated carbon, backwashing water flows into from the unitary bottom of biological activated carbon water outlet 202, through gravel 203 and biological activated carbon layer 201, discharges from top backwashing water water outlet 204 at last.
As shown in table 1, adopt independent ozone/ultraviolet method, the clearance of total organic carbon in the water (TOC) is 13.8%, permanganate (COD
Mn) clearance be 22.8%, be 68.4% to the clearance of 254nm ultraviolet absorption value (UV254); And adopting ozone/ultraviolet of the present invention-biological activated carbon method, then corresponding clearance to be respectively 40.7%, 47.0% and 79.0%, clearance improves 195%, 106% and 15% respectively.As seen, ozone/ultraviolet-biological activated carbon method is much higher than ozone/ultraviolet method to the removal efficient of organic pollutant in the water.
Table 1 ozone/ultraviolet-biological activated carbon method is to the decontamination effect improving of reservoir water
| Water-quality guideline | ????TOC | ????COD Mn | ????UV254 | |
| Influent concentration (mg/L) | ????5.1-7.0 | ????2.8-3.9 | ????0.049-0.062 | |
| Average removal rate (%) | O 3/UV | ????13.8 | ????22.8 | ????68.4 |
| O 3/UV+BAC | ????40.7 | ????47.0 | ????79.0 | |
Annotate: O
3/ UV is ozone/ultraviolet method; O
3/ UV+BAC is ozone/ultraviolet-biological activated carbon method.
Embodiment two: ozone/ultraviolet-biological activated carbon method clarifying urban sewage treatment plant secondary effluent.
Adopt the secondary effluent of ozone/ultraviolet-biological activated carbon method clarifying urban sewage treatment plant, wherein pending water is 16min in the unitary residence time of ozone/ultraviolet, is 15min in the unitary residence time of biological activated carbon.When the unitary ozone dosage of ozone/ultraviolet is respectively 2.5mg/L, 6mg/L and 9mg/L, the removal effect of water pollutant is seen Table 2.When the ozone dosage was 2.5mg/L, ozone/ultraviolet method was to total organic carbon in the water (TOC) and permanganate index (COD
Mn) clearance be respectively 23.5% and 30.1%, and ozone/ultraviolet of the present invention-biological activated carbon method is to TOC and COD
MnClearance then reach 41.3% and 53.8% respectively, improve 76% and 79% respectively; When the ozone dosage was 6mg/L and 9mg/L, clearance improved ratio also all more than 60%.Ozone/ultraviolet-biological activated carbon is better than ozone/ultraviolet method greatly to the removal effect of organic pollutant.
Table 2 ozone/ultraviolet-biological activated carbon method is to removal effect of organic matter in the secondary effluent
| Water-quality guideline | ?????????????????????TOC | ????????????????????COD Mn | |||||
| Ozone dosage (mg/L) | ????2.5 | ????6 | ????9 | ????2.5 | ????6 | ????9 | |
| Influent concentration (mg/L) | ????12.3-14.2 | ????14.4-16.0 | ????13.0-15.1 | ????8.8-10.6 | ????9.3-10.3 | ????9.4-10.0 | |
| Average removal rate (%) | O 3/UV | ????23.5 | ????29.0 | ????33.8 | ????30.1 | ????42.2 | ????48.8 |
| O 3/UV+BAC | ????41.3 | ????50.0 | ????55.0 | ????53.8 | ????69.9 | ????81.0 | |
Annotate: O
3/ UV is ozone/ultraviolet method; O
3/ UV+BAC is ozone/ultraviolet-biological activated carbon method.
Claims (2)
1. ozone/ultraviolet-biological activated carbon is removed the method for underwater micro-organic matter, it is characterized in that this method mainly comprises following ozone/ultraviolet and two unit of biological activated carbon:
Pending water enters from the bottom of ozone/UV reactive device, and ozone gas feeds from the bottom of described reactor, and described ozone gas is through air distribution plate and water uniform mixing in the described reactor; The ultraviolet lamp of the built-in outer cover quartz socket tube of described reactor, water and the ozone gas reactor of upwards flowing through, the organic pollutant in the water was removed or transformed between 4～20min the residence time; Top water outlet from described reactor in the water after the preliminary treatment flows out, and ozone tail gas is discharged from the gas discharge outlet of described reactor;
Through the water of above-mentioned preliminary treatment a side inflow from the biological activated carbon reactor, the biological activated carbon layer that current are filled in described reactor, the residence time, organic pollutant was by biological degradation, removal in the water between 10～80min; Water after the processing flows out from described reactor opposite side.
2. the method for removal underwater micro-organic matter according to claim 1 is characterized in that: the ozone dosage in described ozone/ultraviolet unit is 0.5mg/L～10mg/L.
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| CNB03122931XA CN1176035C (en) | 2003-04-26 | 2003-04-26 | Method for removing trace amount of organic matter by using ozone/ultraviolet-biological activity carbon |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103395952A (en) * | 2013-08-20 | 2013-11-20 | 哈尔滨工业大学 | Water processing apparatus with functions of ozone oxidation, bio-augmentation by tow levels of active carbon and ultraviolet sterilization |
| CN105815199A (en) * | 2016-03-21 | 2016-08-03 | 湖北玉如意芽业科技股份有限公司 | Water circulation use method and system for bean sprout culture |
| CN110759437A (en) * | 2019-10-12 | 2020-02-07 | 清华苏州环境创新研究院 | Method for electrochemical-UV composite treatment of refractory organic matters |
-
2003
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103395952A (en) * | 2013-08-20 | 2013-11-20 | 哈尔滨工业大学 | Water processing apparatus with functions of ozone oxidation, bio-augmentation by tow levels of active carbon and ultraviolet sterilization |
| CN103395952B (en) * | 2013-08-20 | 2014-09-24 | 哈尔滨工业大学 | Water processing apparatus with functions of ozone oxidation, bio-augmentation by tow levels of active carbon and ultraviolet sterilization |
| CN105815199A (en) * | 2016-03-21 | 2016-08-03 | 湖北玉如意芽业科技股份有限公司 | Water circulation use method and system for bean sprout culture |
| CN110759437A (en) * | 2019-10-12 | 2020-02-07 | 清华苏州环境创新研究院 | Method for electrochemical-UV composite treatment of refractory organic matters |
| CN110759437B (en) * | 2019-10-12 | 2022-02-01 | 清华苏州环境创新研究院 | Method for electrochemical-UV composite treatment of refractory organic matters |
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Granted publication date: 20041117 Termination date: 20120426 |