CN101481196B - Advanced treatment process and apparatus for reverse osmosis concentrated water - Google Patents
Advanced treatment process and apparatus for reverse osmosis concentrated water Download PDFInfo
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- CN101481196B CN101481196B CN2009100773155A CN200910077315A CN101481196B CN 101481196 B CN101481196 B CN 101481196B CN 2009100773155 A CN2009100773155 A CN 2009100773155A CN 200910077315 A CN200910077315 A CN 200910077315A CN 101481196 B CN101481196 B CN 101481196B
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- reverse osmosis
- concentrated water
- osmosis concentrated
- ozone
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Abstract
The invention relates to a technology and a device for the advanced processing of reverse osmosis condensed water, wherein the technology is as follows: reverse osmosis condensed water which is directly outputted and discharged is inputted into a processor with inside-arranged biological active carbon, then ozone of the reverse osmosis condensed water, which has the density of 5 mg/L to 50 mg/l, is added on the aeration grid part of the processor; the ozone reacts with hydroxide free radicals to form oxyhydrogen free radicals of strong oxidbility in the processor; the hydroxide free radicals are used for oxidizing and decomposing organic polluting substances in the reverse osmosis condensed water, and the reverse osmosis condensed water processed by the ozone is directly outputted from the processor. The device comprises a base, a filtration cylinder and a reverse washer, wherein active carbon is put in the filtration cylinder. The hydroxide free radicals of strong oxidbility generated by the reaction of the ozone and the hydroxide free radicals are used as an oxidization middle product for oxidizing the organic polluting substances which can not be degraded in the reverse osmosis condensed water to form the organic substances which can be conveniently absorbed by the active carbon and biologically degraded, and COD value is lowered.
Description
Technical field
The present invention is about a kind of technology and device thereof that reverse osmosis concentrated water is carried out further advanced treatment.
Background technology
For general Waste Water Treatment; Adopt conventional biochemical process that waste water is carried out pre-treatment often, waste water is after biochemical treatment, and the organic pollutant of degraded is all by biological degradation easily; And remain in the pollutent in the water; Be not easy often by biological degradation or can not be by biodegradable organic pollutant, these pollutents can pass through chemical oxygen demand, and (Chemical Oxygen Demand COD) detects.So-called COD (COD) is under certain conditions, when adopting certain strong oxidizer to handle water sample, and the oxidant content that is consumed, it is to represent what a index of reducing substances in the water.Reducing substances in the water has various organism, nitrite, sulfide, ferrous salt etc.But mainly be various organism; The compound and the verivate thereof of the most of carbon elements that promptly are not easy to be decomposed; Like alkenes compounds, amine and some carboritrides, carbocyclic ring, heterocyclic aromatics, sulfide, phosphide, alcohol, aldehyde, ether and hydrocarbon polymer or the like.Therefore often as weighing what index of organic content in the water, promptly COD is big more, explains that water body receives organic pollution serious more for COD (COD).
In order to reduce the index of COD; In recent years along with the raising of reverse osmosis membrane quality and the continuous reduction of price; Make reverse osmosis technology in the advanced treatment process of waste water recycling and water, obtain application more and more widely, but must be noted that reverse osmosis technology can not be eliminated or degradation water in organic pollutant; It just shifts the organic pollutant in the former water and concentrate, so just formed reverse osmosis concentrated water.At present the processing mode to reverse osmosis concentrated water is the deep-well injection, sprays or enter ocean or tidewater, but this this processing mode all exists soil, seawater are had pollution problems, and cost is handled higher simultaneously.
Summary of the invention
In view of this, the object of the present invention is to provide and a kind of reverse osmosis concentrated water is carried out further advanced treatment technique and device thereof.
The advanced treatment process of reverse osmosis concentrated water among the present invention; Be that the reverse osmosis concentrated water that will export directly discharging is imported in the treatment unit that is built-in with biological activated carbon once more, behind the said treatment unit that is built-in with biological activated carbon of said reverse osmosis concentrated water input, add the ozone of every liter of reverse osmosis concentrated water of 5-50 milligram at the aeration grid place of said treatment unit; Said ozone generates the hydroxyl free radical with strong oxidizing property with the hydroxyl free radical reaction in said treatment unit; By said hydroxyl free radical the organic pollutant in the reverse osmosis concentrated water is carried out oxygenolysis, the reverse osmosis concentrated water after ozonize is directly exported from said treatment unit through the further absorption and the biological degradation of bioactive carbon again.
The residence time of said reverse osmosis concentrated water in said treatment unit is 1.5-3 hour.
The advanced treatment apparatus of reverse osmosis concentrated water includes base, filtration barrel body, backwash device among the present invention; In said filtration barrel body set inside gac is arranged; Said base is provided with water inlet pipe and water outlet pipe; Said filtration barrel body is connected with the top of said base through flange, and between said flange and base, is provided with the screen plate that is used to carry said gac, is provided with the aeration grid of the ozone that is used to import every liter of reverse osmosis concentrated water of 5-50 milligram at the position of the approaching said base of said filtration barrel body; Said backwash device includes backwash effluent trough, the backwash rising pipe that is located at said filtration barrel body top and is located at the backwash tracheae on the said base.
Said aeration grid include aeration tube and are distributed in the aeration arm of said aeration tube both sides, on said aeration arm, offer a plurality of and vertical line and present the solarization air cap that miter angle distributes.
Be provided with strainer head in the filter pore of said screen plate.
The advanced treatment process of reverse osmosis concentrated water and device thereof expose to the sun into ozone by means of the aeration grid of filtration barrel body bottom among the present invention; Utilizing ozone and hydroxyl free radical reaction to produce the hydroxyl free radical with strong oxidizing property comes nondegradable organic pollutant in the reverse osmosis concentrated water as intermediate oxidation product; The intermidate oxide of charcoal absorption is convenient in formation; Even be converted into harmless inorganics completely, like carbonic acid gas and water etc., expose to the sun simultaneously into ozone can improve the surface property such as specific surface area, hole, functional group of gac; The biodegradability and the absorption property of biological activated carbon bed have been strengthened; Improve the clearance of COD, reduced the COD value, can reach the integrated wastewater discharge standard of existing China fully.
Description of drawings
Fig. 1 is the cross-sectional schematic of the advanced treatment apparatus of reverse osmosis concentrated water among the present invention;
Fig. 2 is the schematic top plan view of aeration grid among the present invention;
Fig. 3 is along the cross-sectional schematic of A-A line among Fig. 2;
Fig. 4 is the schematic top plan view of filter plate among the present invention;
Fig. 5 is the decomposition principle figure of ozone among the present invention.
Embodiment
To combine accompanying drawing that the most preferred embodiment among the present invention is elaborated below.
As shown in Figure 1, the advanced treatment apparatus of reverse osmosis concentrated water is a biological gac device among the present invention, includes base 1, filtration barrel body 2, backwash device, wherein:
Base 1 is provided with and is used to import reverse osmosis concentrated water and output water purifying water inlet pipe and water outlet pipe 10, and backwash tracheae 11.Filtration barrel body 2 is fixedly connected with the top of base 1 is dismountable through flange 20; And between the top of flange 20 and base 1, be provided with screen plate 21; Like Fig. 1 and shown in Figure 4, in the filter opening 23 of screen plate 21, strainer head 22 is installed, play the effect of water distribution uniformity, gas distribution.
Be disposed with the multilayer active carbon layer from the bottom up in filtration barrel body 2 inside; Wherein gac is owing to have great specific surface area and very strong adsorptive power; Can remove the remaining organic particle of reverse osmosis concentrated water, colloidal solid, mikrobe and trace metal etc., make effluent quality reach higher index.And be provided with aeration tube 24 near the bottom at filtration barrel body 2; Be provided with many aeration arms 25 in the both sides of aeration tube 24; Constitute the aeration grid by aeration tube 24 and aeration arm 25, wherein aeration arm 25 is provided with a plurality of solarization air caps 26 that are miter angle with vertical line, as shown in Figures 2 and 3.Aeration is a kind of technology of in sewage treatment process, using always at present; In this explanation no longer separately; But the present invention through the aeration grid expose to the sun into be the ozone of every liter of reverse osmosis concentrated water of 5-50 milligram; Reverse osmosis concentrated water in the filtration barrel body 2 is better contacted with ozone, and because agitated liquid has been quickened the transfer of ozone in liquid; Ozone is through producing the hydroxyl free radical (OH) with strong oxidizing property with the hydroxyl free radical reaction simultaneously; Utilize hydroxyl free radical (OH) to realize the organic pollutant in the reverse osmosis concentrated water is carried out oxidation, can transfer and spissated organic pollutant effectively be decomposed, form easily by charcoal absorption and biodegradable organism as intermediate oxidation product.
The backwash device includes backwash effluent trough 30, the backwash rising pipe 31 that is located at filtration barrel body 2 tops and is located at the backwash tracheae 11 on the base 1; Because the setting and the principle of work of backwash device also are prior aries; Therefore explanation no longer separately is mainly used in the gacs do cleaning of filtration barrel body 2 inside is used.
The advanced treatment process of reverse osmosis concentrated water and device thereof are through importing reverse osmosis concentrated water in the filtration barrel bodies 2 from water inlet pipe and water outlet pipe 10 among the present invention; And expose to the sun into ozone through the aeration grid; Utilize ozone and hydroxyl free radical reaction to produce hydroxyl free radical (OH) with strong oxidizing property; Realize oxidation with hydroxyl free radical as intermediate oxidation product; Can organic pollutant effectively be decomposed through hydroxyl free radical (OH) reaction, even be converted into harmless inorganics completely, like carbonic acid gas and water etc.; And then through the biological degradation of bioactive carbon the organic pollutant in the reverse osmosis concentrated water is further degraded, wherein reverse osmosis concentrated water gets into the times that filtration barrel body 2 backs stop and was generally 1.5 to 3 hours.Reverse osmosis concentrated water after will handling at last directly discharges from water inlet pipe and water outlet pipe 10.
Wherein ozone concrete oxidising process and mechanism in filtration barrel body 2 is following:
The oxidation capacity of ozone is extremely strong, is only second to fluorine, and its redox potential is:
O
2+ H
2O → O
3+ H
++ 2e (under the acidic conditions) E
0=2.07V
O
2+ 2OH
-→ O
3+ H
2O+2e (under the alkaline condition) E
0=1.24V
Ozone is some element of oxidation and organic cpds rapidly and widely, even under the lower concentration situation, also can accomplish moment.The ozone that is dissolved in the water is more stable under the acidic conditions again, but raises when PH or water temperature, and ozone can be accelerated organic decomposition rate gradually.Specifically be ozone molecule (O
3) and hydroxyl radical free radical (OH
-) reaction generation superoxide radical (O
2 -) and ultra hydrogen oxide radical (HO
2), as shown in Figure 5, superoxide radical (O
2 -) again with ozone molecule (O
3) reaction and with hydrogen base (H
-) combination generation hydrogenation ozone radical (HO
3), then by hydrogenation ozone radical (HO
3) be decomposed into oxygen molecule (O
2) and hydroxyl free radical (OH).Decomposing the hydroxyl free radical (OH) that produces through ozone has than ozone molecule O
3Stronger oxidation capacity can be to the alkenes compounds in the reverse osmosis concentrated water, amine and some carboritrides; Carbocyclic ring, heterocyclic aromatics, sulfide, phosphide etc., alcohol, aldehyde, ether and hydrocarbon polymer carry out oxidation; That is to say; Organic pollutant to the quilt in the reverse osmosis concentrated water concentrates, shifts is made further the efficient oxidation, is oxidized to and is convenient to the easy adsorbed organic matter particle of gac, a colloid material, even change into carbonic acid gas and water.
As shown in Figure 5; The decomposition course of ozone is a free radical chain reactions (Radical ChainReaction); In this chain reaction process; The hydroxyl free radical (OH) that ozone reaction produces plays an important role in the ozonize process, and a part of hydroxyl free radical (OH) is used for the oxygenolysis organic pollutant, a part of hydroxyl free radical (OH) and ozone molecule (O
3) be combined into ozone hydroxyl free radical (O
3OH), ozone hydroxyl free radical (O
3OH) decomposite oxygen molecule (O
2) and be converted into hydrogen oxide radical (HO
2), accomplish an ozone decomposition course.Hydrogen oxide radical (the HO that in this decomposition course, changes into
2) and superoxide radical (O
2 -) between chemical equilibrium relation is arranged, so can constitute a circulation chain reaction, the superoxide radical (O that promptly generates
2 -) again with ozone molecule (O
3) the next round-robin chain reaction of effect beginning; So can react and produce enough hydroxyl free radicals (OH); Can carry out oxidation completely to the reverse osmosis concentrated water of input filtration barrel body; And then the further biological degradation through biological activated carbon, guarantee that the COD index drops to the integrated wastewater discharge standard of China.
Claims (2)
1. the advanced treatment process of a reverse osmosis concentrated water; Be that the reverse osmosis concentrated water that will export directly discharging is imported in the treatment unit that is built-in with biological activated carbon once more; It is characterized in that, behind the said treatment unit that is built-in with biological activated carbon of said reverse osmosis concentrated water input, add the ozone of every liter of reverse osmosis concentrated water of 5-50 milligram at the aeration grid place of said treatment unit; Said ozone is in said treatment unit and OH
-Reaction generates the OH with strong oxidizing property, by said OH the organic pollutant in the reverse osmosis concentrated water is carried out oxygenolysis, and the reverse osmosis concentrated water after ozonize is directly exported from said treatment unit through the further absorption and the biological degradation of biological activated carbon again.
2. the advanced treatment process of reverse osmosis concentrated water according to claim 1 is characterized in that, the residence time of said reverse osmosis concentrated water in said treatment unit is 1.5-3 hour.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100773155A CN101481196B (en) | 2009-02-17 | 2009-02-17 | Advanced treatment process and apparatus for reverse osmosis concentrated water |
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| CN2009100773155A CN101481196B (en) | 2009-02-17 | 2009-02-17 | Advanced treatment process and apparatus for reverse osmosis concentrated water |
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| CN101481196B true CN101481196B (en) | 2012-07-04 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102040312B (en) * | 2009-10-23 | 2012-11-21 | 中国石油化工股份有限公司 | Method for treating reverse osmosis concentrated water |
| CN101811798A (en) * | 2010-03-23 | 2010-08-25 | 中国市政工程华北设计研究总院 | Method for improving security of water quality by utilizing microorganism-membrane compound technology |
| CN108117221B (en) * | 2016-11-29 | 2021-01-05 | 中国石油化工股份有限公司 | Treatment method of reverse osmosis concentrated water |
| CN107840471A (en) * | 2017-05-12 | 2018-03-27 | 肇庆学院 | A kind of high-efficiency sewage processor, method |
| CN108358300B (en) * | 2018-04-25 | 2021-06-01 | 钱泽袁 | Reverse osmosis concentrated water treatment device and treatment process thereof |
| CN108483729A (en) * | 2018-05-14 | 2018-09-04 | 北京赛科康仑环保科技有限公司 | One kind being used for reverse osmosis concentrated water organic matter removal treatment process |
| CN112358139A (en) * | 2020-11-30 | 2021-02-12 | 吴江华衍水务有限公司 | Membrane filtration concentrated water treatment device and treatment method |
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