CN101591129A - The advanced treatment method for sewage water of adopting combined use of hydroxyl radical active oxygen-bioactive carbon - Google Patents
The advanced treatment method for sewage water of adopting combined use of hydroxyl radical active oxygen-bioactive carbon Download PDFInfo
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- CN101591129A CN101591129A CNA200910147897XA CN200910147897A CN101591129A CN 101591129 A CN101591129 A CN 101591129A CN A200910147897X A CNA200910147897X A CN A200910147897XA CN 200910147897 A CN200910147897 A CN 200910147897A CN 101591129 A CN101591129 A CN 101591129A
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Abstract
The present invention relates to the advanced treatment method for sewage water of adopting combined use of hydroxyl radical active oxygen-bioactive carbon, it is characterized in that comprising that the hydroxyl radical free radical active oxygen is handled and biological activated carbon is handled two unit: treatment sewage at first mixes with the hydroxyl radical free radical active oxygen that is produced by hydroxyl radical free radical active oxygen generating unit, dosage is 5-25mg/L, enter from the oxidizing tower bottom subsequently, in oxidizing tower, finish oxidizing reaction; Dwell time in the tower 5～20min, the organic pollutant in the water are removed or decompose, transform; Water after the preliminary treatment flows out from the oxidizing tower top, enters the biological activated carbon reactor, the residence time 60～180min, and organic pollutant is by biological degradation, removal in the water.Present method can be removed organic pollutant efficiently, and treatment effect is good, and cost is low, can extensively be applied to the advanced treatment of city domestic sewage and industrial sewage first grade discharging.
Description
Technical field
The invention belongs to sewage treatment area, particularly relate to a kind of advanced treatment method for sewage water of adopting combined use of hydroxyl radical active oxygen-bioactive carbon.
Background technology
At present, the method of sewage disposal is a lot, dissimilar sewage there is different treatment processs, most of municipal effluents and industrial sewage adopt aeration tank or activated sludge process usually, be to utilize microbial process that the organic pollutant that is dissolving, colloid and fine suspended state in the sewage is decomposed or be converted into free of contamination carbonic acid gas, water and stable harmless object, part synthesized micro-organism material impels microorganisms grow, thereby the COD of sewage, BOD is reduced greatly.This traditional activated sludge process system is huge, and complex process, floor space are big, invests hugely, and the power consumption height generally accounts for 60～70% of cost of sewage disposal, and removal effect of organic matter such as nitrogen, phosphorus is also undesirable; The residual active sludge of discharging causes secondary pollution, handles very difficultly, reproduces into environmental hazard.
It is a kind of advanced oxidation treatment technology that the hydroxyl radical free radical active oxygen is handled.Current advanced oxidation treatment technology mainly contains Fenton method, oxidizing, flocculating method, electrocatalysis method, ozone method, ultrasonic degradation method and photocatalytic method etc.Some method in these methods such as Fenton method, electrocatalysis method have effect preferably aspect treatment of Organic Wastewater, fruitful in degraded and decolouring.But, the organism in the sewage is thoroughly degraded, need the long time, and processing cost is very high, adds that also there are some unvanquishable problems in some technology, has limited them in Application of Sewage.
Along with the fast development and the people's living standard of industry improves constantly, the sewage and the city domestic sewage quantity that are produced by industrial production increase sharply, and wherein the quantity of hardly degraded organic substance also greatly increases, and this has brought very big difficulty to sewage disposal.A lot of industrial sewages adopt traditional technology to handle, and have been difficult to qualified discharge.In addition, increasingly serious along with environmental issue with discharging or reuse again after the advanced treatment of wastewater, has been trend of the times.But, current a lot of sewage work or station all are to design according to sewage comprehensive discharge secondary standard, reaching first discharge standard need carry out bigger adjustment to technology, and some sewage does not have suitable technology draining depth can be handled criterion of acceptability because biodegradability is relatively poor.
Hydroxyl radical free radical active oxygen generating unit is a kind of active oxygen of hydroxyl radical free radical efficiently generating unit.It is to utilize in the world that the cutting edge technology of fuel cell prepares efficient electrocatalysis membrane electrode, can be under mild conditions, collection reaction and the synthesis of hydroxy free radical activity oxygen that is separated into one, be a kind of energy-conservation, atomic economy reaction, eco-friendly novel chemical process.The hydroxyl radical free radical active oxygen of its generation has very high oxidisability, but the various organism in the efficient oxidation, degradation of sewage.
The hydroxyl radical free radical active oxygen, oxidation potential=2.8V only is lower than fluorine, is higher than ozone etc.
Though the treatment effect of hydroxyl radical free radical active oxygen is fine, but, as if the organism in the secondary sewage effluent of degrading fully by it, because organic kind and quantity are various, still exist handling can not be up to standard fully and cause the cost extra-high-speed, can't be applied to the problem in the sewage disposal.
Summary of the invention
The objective of the invention is in order to solve above-mentioned prior art advanced treatment of wastewater technology the sewage work or the particularly relatively poor problem that the draining treatment effect is limited, cost is high of biodegradability of secondary draining of standing, be engaged in exploitation, research and the practice of sewage disposal for a long time through the contriver, a kind of method of advanced treatment of wastewater of more effective adopting combined use of hydroxyl radical active oxygen-bioactive carbon is provided.
The advanced treatment method for sewage water of a kind of adopting combined use of hydroxyl radical active oxygen-bioactive carbon provided by the invention is characterized in that mainly comprising following two processing units: the hydroxyl radical free radical active oxygen is handled and biological activated carbon is handled two unit.
1. the hydroxyl radical free radical active oxygen is handled
Treatment sewage at first mixes with the hydroxyl radical free radical active oxygen that is produced by hydroxyl radical free radical active oxygen generating unit, wherein hydroxyl radical free radical active oxygen dosage is pending every liter of sewage 5～25mg, preferred 10～～20mg, enter oxidizing tower bottom water distributor subsequently, through the inner filler of filling of oxidizing tower with katalysis; The sewage that has the hydroxyl radical free radical active oxygen oxidizing tower of upwards flowing through, the residence time is 5～20min, be preferably 15～20, organic pollutant in the sewage is removed by oxidation rapidly, degraded or decomposition, conversion, and the sewage after the hydroxyl radical free radical active oxygen is handled flows out from the water outlet at oxidizing tower top.
2. biological activated carbon is handled
1. the sewage of handling through step is from a side inflow of biological activated carbon reactor, the biological activated carbon layer of flowing through and filling in the described reactor, the residence time is between 30～180min, organism in the sewage is by further degraded, removal, sewage after the processing flows out from the opposite side of described reactor, reaches first discharge standard.
In the method according to advanced treatment of wastewater provided by the invention, hydroxyl radical free radical active oxygen generator device (commercially available prod) in the described hydroxyl radical free radical active oxygen processing unit is a kind of active oxygen of hydroxyl radical free radical efficiently generating unit, the hydroxyl radical free radical active oxygen that produces has very high oxidisability, for example OH free radical, H
2O
+, H
2O
2, H
3O etc. are very strong active ions, not only with organism generation hydrogen abstraction reaction, and there is the addition free radical compound etc., be that strong oxygenant and inorganic dissolved substance reacts, especially heavy metal ion is reduced into metal ion in the sewage, it has high oxidation potential=2.8V, only is lower than fluorine, is higher than ozone etc.Particularly with after sewage mixes, in oxidizing tower (commercially available), have under the effect of katalysis filler, the hydroxyl radical free radical active oxygen is the organic pollutant in the oxidizing water rapidly, make organic pollutant be degraded faster or remove, simultaneously more a high proportion of organic substance degraded or be converted into easily by biodegradable material significantly improves the biodegradable of sewage.
The amount of the hydroxyl radical free radical active oxygen that adds at hydroxyl radical free radical active oxygen processing unit can be determined according to the target of advancing sewage quality and effluent quality, at 5mg/L～25mg/L, be preferably 10～20; Pending sewage is long more in the time of hydroxyl radical free radical active oxygen processing unit and the stop of biological activated carbon processing unit, the hydroxyl radical free radical active oxygen that adds is many more, then the advanced treatment effect of sewage is good more, water quality after the processing is good more, but can increase the general residence time of processing cost between 5～20 minutes, be preferably 15～20 fens.
The oxidation potential of several oxygenants that table 1 is commonly used
| Sequence number | Oxidant (oxygenant) | Oxidation Potential, (oxidation potential, v) |
| 1 | The Fluorine fluorine | 3.0 |
| 2 | Hydroxyl radical hydroxyl free oxygen | 2.8 |
| 3 | Ozone ozone | 2.1 |
| 4 | Hydrogen peroxide hydrogen peroxide | 1.8 |
| 5 | Potassium permanganate potassium permanganate | 1.7 |
| 6 | Chlorine dioxide dioxide peroxide | 1.5 |
| 7 | Chlorine chlorine | 1.4 |
In the biological activated carbon unit, more various microbial bacterias have been grown at activated carbon surface, when effluent stream process biological activated carbon layer, pollutants in sewage particularly organism is handled and is converted into that biodegradable organism is adsorbed by biological activated carbon once more and degraded is removed through the hydroxyl radical free radical active oxygen, residual refractory organic also can obtain part by the anerobe of gac inside and remove.After the hydroxyl radical free radical active oxygen was handled and the biological activated carbon processing combines, sewage made pollutants in sewage more be converted into biodegradable material, and does not need to degrade fully as long as carries out preliminary processing at hydroxyl radical free radical active oxygen processing unit.This has obviously shortened the consumption and the treatment time of hydroxyl radical free radical active oxygen greatly, so can reduce the processing cost of hydroxyl radical free radical active oxygen processing unit; Simultaneously, after sewage was handled through the hydroxyl radical free radical active oxygen, the ratio of biodegradable organic improved in the sewage, is more suitable for biological activated carbon and handles, and the biological activated carbon processing efficiency also improves.
Relate to various device in the method for advanced treatment of wastewater of the present invention and be the commercially available prod, catalytically active packing material also is commercially available.
The characteristics of advanced treatment method for sewage water provided by the invention are for being that hydroxyl radical free radical active oxygen and biological activated carbon treatment technology are organically combined through repetition test and practice, be applicable to the advanced treatment of wastewater of secondary draining, have both processing of hydroxyl radical free radical active oxygen and biological activated carbon and handled characteristics separately, and far surmount the effect that both deal with separately and overcome both be beyond one's reach separately effect and shortcoming, start the method for new generation of the advanced treatment that is suitable for the one-level draining.Utilize the extremely strong oxidisability of hydroxyl radical free radical, make organic structure be suitable for the variation of biology (microbial bacteria) degraded to improve biodegradable, binding bioactive charcoal technology energy economical and effective is removed the characteristics of biodegradable organic, thus the organism in the degradation of sewage of economical and efficient.Compare with independent hydroxyl radical free radical active oxygen treatment process, this method is more economical.
Advanced treatment method for sewage water provided by the invention can be widely used in the advanced treatment of the first grade discharging of existing city domestic sewage and industrial sewage.
Description of drawings
Fig. 1 is the process flow diagram of the advanced treatment of wastewater of hydroxyl radical free radical active oxygen-biological activated carbon associating.
Embodiment
The present invention further specifies the present invention with following embodiment, but protection scope of the present invention is not the following example.
Embodiment 1:
At first mix with the hydroxyl radical free radical active oxygen of hydroxyl radical free radical active oxygen generating unit 1 (commercially available) generation from municipal effluent as Fig. 1 through generally including sewage or the secondary draining that mechanical treatments such as grid, sedimentation basin, preliminary sedimentation tank cross, hydroxyl radical free radical active oxygen dosage is the 10g/M that enters sewage quantity, enters oxidizing tower 3 bottom water distributors 4 after line mixer 2 mixes; The inner filler 5 of filling of described oxidizing tower with catalytic activity, the sewage that has the hydroxyl radical free radical oxidizing tower of upwards flowing through, the residence time is about 12min, for example the organism in the water is under the effect that has the katalysis filler, the hydroxyl radical free radical active oxygen is the organic pollutant in the oxidizing water rapidly, make organic pollutant be degraded faster or remove, more a high proportion of material is converted into easily by biodegradable material simultaneously, significantly improves the biodegradable of sewage., improve biodegradability.Sewage after preliminary treatment flows out from the water outlet 6 at described oxidizing tower top;
Flow into through the sewage of above-mentioned preliminary treatment top side water-in 8 from biological activated carbon reactor 7, the biological activated carbon layer 9 that current are filled in described reactor, residence time 160min, in the biological activated carbon unit, grown more microorganism at activated carbon surface, when current process biological activated carbon, the pollutent in the water is adsorbed by biological activated carbon and degrades.Those are converted into biodegradable organism at hydroxyl radical free radical active oxygen processing unit and are removed in the biological activated carbon unit, residual refractory organic, also can obtain part by the anerobe of gac inside and remove, the water after the processing flows out from the bottom side water outlet 10 of described reactor.
According to the concentration and the processing requirements of water pollutant, can also be in the biological activated carbon unit aeration.The biological activated carbon unit will carry out back flushing to upgrade the surface of biological activated carbon after running for some time.Backwashing water flows into from the water port 10 of bottom, biological activated carbon unit, through sandstone 11 and biological activated carbon layer 9, discharges from the water outlet 12 of top backwashing water at last.The results are shown in table 2, adopt that water outlet COD, BOD and ammonia nitrogen concentration drop to 37mg/L, 5mg/L and 4mg/L respectively after the adopting combined use of hydroxyl radical active oxygen-bioactive carbon advanced treatment of the present invention, and the method that only adopts biological activated carbon to handle, keep the same residence time, handle back water outlet COD, BOD and ammonia nitrogen concentration and drop to 112mg/L, 8mg/L and 15mg/L (seeing Table 3) respectively; Simple the variation of handling back water outlet COD and ammonia nitrogen is little with the oxidation of hydroxyl radical free radical active oxygen, but BOD has significantly rising (seeing Table 4), and the adding of visible hydroxyl oxygen can obviously improve the biodegradability of sewage.Because the improvement of biodegradability, the adopting combined use of hydroxyl radical active oxygen-bioactive carbon deep treatment method obviously improves the removal effect of organic pollutant.
The treatment effect of table 2 adopting combined use of hydroxyl radical active oxygen-bioactive carbon advanced treatment process
| Water-quality guideline | COD | BOD | Ammonia nitrogen |
| Influent concentration, mg/L | 189 | 42 | 35 |
| Go out water concentration, mg/L | 37 | 5 | 4 |
| Average removal rate, % | 80.4 | 88.1 | 88.6 |
Table 3 biological activated carbon advanced treatment effect
| Water-quality guideline | COD | BOD | Ammonia nitrogen |
| Influent concentration, mg/L | 189 | 42 | 35 |
| Go out water concentration, mg/L | 112 | 8 | 15 |
| Average removal rate, % | 40.6 | 81.0 | 57.1 |
Table 4 hydroxyl radical free radical active oxygen oxide treatment effect
| Water-quality guideline | COD | BOD | Ammonia nitrogen |
| Influent concentration, mg/L | 189 | 42 | 35 |
| Go out water concentration, mg/L | 170 | 76 | 26 |
| Average removal rate, % | 10.1 | -- | 25.7 |
Embodiment 2-3:
The treatment step of this example 2-3 is same as example 1, and not pending simultaneously sewage stops 15min in the oxidizing tower in hydroxyl radical free radical active oxygen processing unit, stops 120min at the biological activated carbon reactor.When hydroxyl radical free radical active oxygen dosage was respectively 6mg/L (example 2) and 12mg/L (example 3), oxidizing tower can see Table 5 to COD and ammonia-N removal rate.And adopting combined use of hydroxyl radical active oxygen-bioactive carbon deep treatment method of the present invention when hydroxyl radical free radical active oxygen dosage is 12mg/L, reaches 75.4% and 90.5% respectively to COD and ammonia-N removal rate.As seen handle with simple hydroxyl radical free radical active oxygen and compare, adopting combined use of hydroxyl radical active oxygen-bioactive carbon advanced treatment method wants high many to the removal effect of organic pollutant, and processing cost is lower.
The treatment effect of table 5 adopting combined use of hydroxyl radical active oxygen-bioactive carbon deep treatment method
Comparative example 1
The independent biological activated carbon of present embodiment is handled, and processing step is same as biological activated carbon processing among the embodiment, the results are shown in table 3.
Comparative example 2
This example is handled for the hydroxyl radical free radical active oxygen, and processing step is same as hydroxyl radical free radical active oxygen processing in the example 1, the results are shown in table 4, finds out that by table 3 and 4 results effect obviously is worse than advanced treatment result of the present invention.
Claims (2)
1, a kind of advanced treatment method for sewage water of hydroxyl radical free radical active oxygen one biological gac coupling is characterized in that
1. the hydroxyl radical free radical active oxygen is handled
Treatment sewage at first mixes with the hydroxyl radical free radical active oxygen that is produced by hydroxyl radical free radical active oxygen generating unit, enter oxidizing tower bottom water distributor subsequently, through the inner filler of filling of oxidizing tower with katalysis, the sewage that has the hydroxyl radical free radical active oxygen oxidizing tower of upwards flowing through, the residence time is at 5～20min, organic pollutant in the sewage is oxidized rapidly, degraded or decomposition, transform and remove, sewage after preliminary treatment flows out from the water outlet at described oxidizing tower top, and wherein the dosage of hydroxyl radical free radical active oxygen is pending every liter of sewage 5～25mg;
2. biological activated carbon is handled
1. the sewage of handling through step is from a side inflow of biological activated carbon reactor, the biological activated carbon layer of filling in the described reactor of flowing through, and the organic pollutant in the water further was degraded, removed between 30～180min the residence time; Sewage after the processing flows out from the opposite side of described reactor, reaches first grade discharging water
2, advanced treatment method for sewage water according to claim 1 is characterized in that: the dosage of hydroxyl radical free radical active oxygen is the 10mg/L～20mg/L of pending every liter of sewage in the described hydroxyl radical free radical active oxygen processing unit, 15～20 minutes residence time.
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| CNA200910147897XA CN101591129A (en) | 2009-03-27 | 2009-06-17 | The advanced treatment method for sewage water of adopting combined use of hydroxyl radical active oxygen-bioactive carbon |
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| CNA200910147897XA CN101591129A (en) | 2009-03-27 | 2009-06-17 | The advanced treatment method for sewage water of adopting combined use of hydroxyl radical active oxygen-bioactive carbon |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105859033A (en) * | 2016-05-09 | 2016-08-17 | 南京海益环保工程有限公司 | Domestic sewage treatment process |
| CN106915844A (en) * | 2017-03-31 | 2017-07-04 | 厦门大学 | A kind of marine red tide hydroxyl radical free radical emergence treating method and barge unit |
| CN108439698A (en) * | 2018-03-12 | 2018-08-24 | 扈佳玉 | Process system and application process for sewage treatment plant's upgrading |
| CN110697929A (en) * | 2019-09-25 | 2020-01-17 | 广东省测试分析研究所（中国广州分析测试中心） | Method for treating black and odorous water body by hydroxyl radical active oxygen |
-
2009
- 2009-06-17 CN CNA200910147897XA patent/CN101591129A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105859033A (en) * | 2016-05-09 | 2016-08-17 | 南京海益环保工程有限公司 | Domestic sewage treatment process |
| CN106915844A (en) * | 2017-03-31 | 2017-07-04 | 厦门大学 | A kind of marine red tide hydroxyl radical free radical emergence treating method and barge unit |
| CN108439698A (en) * | 2018-03-12 | 2018-08-24 | 扈佳玉 | Process system and application process for sewage treatment plant's upgrading |
| CN110697929A (en) * | 2019-09-25 | 2020-01-17 | 广东省测试分析研究所（中国广州分析测试中心） | Method for treating black and odorous water body by hydroxyl radical active oxygen |
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Open date: 20091202 |