CN1807288A - Method for deep treatment of bromine ion-containing drinking water - Google Patents
Method for deep treatment of bromine ion-containing drinking water Download PDFInfo
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- CN1807288A CN1807288A CN 200510001788 CN200510001788A CN1807288A CN 1807288 A CN1807288 A CN 1807288A CN 200510001788 CN200510001788 CN 200510001788 CN 200510001788 A CN200510001788 A CN 200510001788A CN 1807288 A CN1807288 A CN 1807288A
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Abstract
The invention relates to an integrated deep-treatment technique for the drinking water contained bromine ion, which comprises by turns: oxygenating with ozone, coagulating, depositing, filtering, flowing through the active carbon, and sterilizing to obtain the final water up to WHO standard. This invention controls and removes the byproduct and micro-pollution organic with low cost, and has wide application.
Description
Technical field
The present invention relates to a kind of water treatment method, specifically relate to a kind of integrated technique treatment process at the bromine ion-containing drinking water advanced treatment.
Background technology
Along with the aggravation of pollution of waterhead and the raising of water quality standard, drinking-water quality becomes the current and expected future outstanding problem that China's water supply industry is faced in one quite long period, deficiency at conventional treatment process, urgently need carry out the technical study of system round existing raw water quality, to satisfy the demand of people to water quality.
At present, both at home and abroad drinking water plant is mainly improved and is improved feedwater water quality by carry out Technology on the basis of original conventional treatment process, and wherein chemical oxidation is means comparatively commonly used.The oxygenant that can be used at present to water treatment mainly contains chlorine, dioxide peroxide, potassium permanganate, hydrogen peroxide and ozone.The harmful halogenated organic matters such as haloform of the organism effect meeting of higher concentration generation in chlorine and the source water in traditional chlorination preoxidation process.Dioxide peroxide has very strong disinfecting power, but is reduced into the chlorite with oxidation operation the time, and latter's toxicity is stronger, and red blood corpuscle is had destruction.Potassium permanganate removes a little less than the oxidation capacity of little pollution technology, DeGrain.Hydrogen peroxide and ferrous iron coupling have stronger oxidation capacity under acidic conditions, still, pH adjusts can not to allow significantly for water treatment.Ozone has the strongest oxidisability in several oxygenants that can be used for to water treatment, be applied to in the water treatment by developed country at present morely.But, also may produce some harmful side products in the ozonize process, as formaldehyde and bromate, international cancer research institution (IRAC) classifies it as may carcinogens.The water quality standard for drinking water separate provision formaldehyde upper limit concentration of health organization (WHO) and Japan is 90 μ g/L and 80 μ g/L, and EPA regulation bromate maximum acceptable concentration is restricted to 10 μ g/L.
Summary of the invention
The objective of the invention is when carrying out, can not effectively remove the defective that disinfection byproduct (DBP) and bromic acid by product exceed standard to water treatment in order to overcome prior art, thereby providing a kind of is core technology with the ozonation technology, by integrated technique tap water is carried out advanced treatment, effectively reduce the preceding pledge of disinfection byproduct (DBP), remove Organic pollutants in the water body, simultaneously, the formation of controlling brominated former water bromate by product in treating processes is lower than 10 μ g/L, make the tap water water outlet reach WHO safe drinking water standard, not only economy but also the practical method that is used for the bromine ion-containing drinking water advanced treatment.
The objective of the invention is to realize by the following technical solutions:
The method that is used for the bromine ion-containing drinking water advanced treatment provided by the invention, be to handle successively according to ozone oxidation, coagulation, precipitation, filtration, gac, disinfectant order---by lift pump former water is injected the ozone oxidation reaction device, after 4～15 minutes, enter coagulation-settler, carry out flocculation reaction and precipitation, after 45～60 minutes residence time, enter sand filtering device, then, effectively remove organic pollutant by the biological activated carbon advanced treatment apparatus, at last, by disinfecting, obtain meeting the tap water of WHO standard.
This method specifically comprises the steps:
1) ozone oxidation: the former water feeding ozone oxidation device of required processing is carried out ozone oxidation, and the ozone reaction amount is the former water of 0.5～2.0mg/L, and be 4～15min duration of contact;
After carrying out ozone oxidation, also can add hydrogen peroxide, remove hardly degraded organic substance in the water body by advanced oxidation, the weight ratio of the add-on of hydrogen peroxide and ozone add-on is 0.05～0.25;
Less than 20～25 o'clock, can add lime at original water hardness/TOC before carrying out ozone oxidation, strengthen the effect of ozone-enhanced coagulation, the dosage of lime is 10～30ppm;
2) carry out conventional coagulation, precipitation, sand filtration processing;
3) biological activated carbon is handled: use biological activated carbon to handle, be 10～15min duration of contact; Described gac comprises: column type charcoal, broken type carbon;
4) sterilization: adopt uv sterilisation, or use chlorine, dioxide peroxide, ozone or high poly-iodine to carry out chemical disinfection as sterilizing agent.
Compared with prior art, the advantage part of method provided by the invention is; (1) adopts ozonize technology to substitute prechlorination technology, place traditional water treatment process (coagulation, precipitation, filtration treatment) preceding, both removed water body chroma, smell flavor, iron, manganese and part easily biodegradable organics, efficiently solve chlorine disinfection by-product again and form problem; (2) by selecting suitable ozone dosage, effectively control the formation of ozonation by-product, final water outlet bromic acid formation amount can effectively be controlled at below the 10ppb; (3) at original water hardness/TOC less than 25 o'clock, by preceding adding lime and optimizing the coagulation process condition, effectively strengthen the effect of flocculant of pre-ozone; (4) by the synergy of conventional coagulation, precipitation, sand filtration processing and ozonation technology, effectively reduce turbidity, removed particulate matter, TOC, COD
MnPreceding pledge with disinfection byproduct (DBP); (5) at last by directly placing the BAC process behind the traditional water treatment process, micro-content organism pollutent in the degraded water body.
In sum, technology and devices such as ozone oxidation that the present invention is integrated, biological activated carbon degraded absorption, enhanced coagulation, whole condition optimizing by integrated technique, drinking water treatment problems such as the preceding pledge removal of disinfection byproduct (DBP), little pollution organic matter removal and the formation of control ozonation by-product have been solved, can carry out advanced treatment to tap water at lower cost, to reach WHO safe drinking water standard; And can effectively control the formation of ozonation by-product (bromate) in the brominated former water treatment procedure, have broad application prospects.
Description of drawings
Fig. 1 is that the drinking water deep of embodiment 1 is handled integrated treating device figure; 1 lift pump wherein, 2 ozone contact tanks, 3 coagulation reaction tank, 4 settling tanks, 5 sand filters, 6 biological activated carbon filters, 7 Sterilizing water tanks;
Fig. 2 is the technology of the embodiment 1 removal situation to organism (is characteristic index with the permanganate indices) under the long-time running state, wherein " ◇-" represents former water, "-" represents water outlet, " △-" the representative filter back water outlet of ozone oxidation, and " *-" represents the biological activated carbon treat effluent;
Fig. 3 is technology bromic acid formation amount in the water outlet under the long-time running state of embodiment 1.
Embodiment
Embodiment 1
Present embodiment adopts Shenzhen City, Guangdong Province, China south raw water reservoir, and this former water such as table 1 are listed, has the feature of high algae, low turbid, little pollution, bromine ion-containing.
Carry out device that water depth handles as shown in Figure 1,1 lift pump wherein, 2 ozone contact tanks, 3 coagulation reaction tank, 4 settling tanks, 5 sand filters, 6 biological activated carbon filters, 7 Sterilizing water tanks.At first former water is injected ozone oxidation reaction device 2 and carry out ozone oxidation by lift pump 1, the ozone reaction amount is the former water of 0.5mg/L, behind the duration of contact 4min, enter coagulation device 3-settler 4, carry out flocculation reaction and precipitation, used flocculation agent is polymerize aluminum chloride (PAC), after 45 minutes residence time, enters sand filtering device 5; Then, by biological activated carbon pond 6, hydraulic detention time is 15min (adopting biological natural membrane method to form biological activated carbon); At last, enter sterilization pool, by adding high polyiodine resin sterilizing agent (patent No. 02245948.0, dosage 0.2mg/L) disinfection.Handle the water quality of back water outlet and list in table 1.
The water quality of table 1, former water and water outlet
| Project | Colourity/PCU | Turbidity/NTU | Total organic carbon/mgL -1 | Permanganate indices/mgL -1 | Haloform generates gesture/μ gL -1 | Halogen acetic acid generates gesture/μ gL -1 | Bromide anion μ gL -1 | Bromic acid μ gL -1 |
| Former water water outlet | 15 ＜1 | 12.5 0.18 | 1.78 0.98 | 2.36 0.86 | 117 16 | 136 28 | 35 20 | 0 ＜2 |
In on June 14th, 2004 to September 24, this technology is carried out detection under the long-time running state, the water outlet of its former water, ozone oxidation, filter back water outlet and biological activated carbon treat effluent are plotted in Fig. 2 to the removal situation of organism (is characteristic index with the permanganate indices), as seen, the permanganate indices stable content is below 1mg/L in the biological activated carbon water outlet, with former water ratio, can remove 1.0～2.0mg/L.
During this period, detect the bromic acid formation amount in the water outlet, be plotted in Fig. 3, show former water (bromide anion content 18～35 μ g/L), be lower than 2.0mg/L in the ozone reaction amount, bromic acid formation amount all is lower than 3ppb in the treatment process water outlet, much smaller than WHO set upper limit (10 μ g/L) standard.
Certain raw water reservoir hardness/TOC is 16 (less than 25), therefore, adds lime technology before the employing.At first lime is added and mix (dosage is 15mg/L) in the former water, by lift pump 1 former water is injected ozone oxidation reaction device 2 and carry out ozone oxidation, the ozone reaction amount is the former water of 2.0mg/L, behind the duration of contact 4min, enter coagulation device 3-settler 4, carry out flocculation reaction and precipitation, used flocculation agent is polymerize aluminum chloride (PAC), after 45 minutes residence time, enter sand filtering device 5; Then, by biological activated carbon pond 6, hydraulic detention time is 15min (adopting biological natural membrane method to form biological activated carbon); At last, enter sterilization pool, chlorination is handled.
Raw water quality and employing add after the lime treatment water quality of water outlet and list in table 2.
The water quality of table 2, former water and water outlet
| Project | Colourity/PCU | Turbidity/NTU | Total organic carbon/mgL -1 | Permanganate indices/mgL -1 | Haloform generates gesture/μ gL -1 | Halogen acetic acid generates gesture/μ gL -1 | Bromide anion μ gL -1 | Bromic acid μ gL -1 |
| Former water water outlet | 10 ＜1 | 6.58 0.15 | 2.38 1.06 | 2.04 0.95 | 124 21 | 148 38 | 27 22 | 0 2.6 |
Embodiment 3
Contain the fenobucarb residue of pesticide in the water of present embodiment Central Plains, therefore, add hydrogen peroxide, the weight ratio of the add-on of hydrogen peroxide and ozone add-on is 0.20 (wherein the ozone add-on is 1.57mg/L).
At first by lift pump 1 former water is injected ozone oxidation reaction device 2 and carry out ozone oxidation, the ozone reaction amount is the former water of 1.57mg/L, behind the duration of contact 4min, adds hydrogen peroxide (weight ratio is 0.20) in the ozone contact tank outlet.Enter coagulation device 3-settler 4, carry out flocculation reaction and precipitation, used flocculation agent is polymerize aluminum chloride (PAC), after 45 minutes residence time, enters sand filtering device 5; Then, by biological activated carbon pond 6, hydraulic detention time is 15min (adopting biological natural membrane method to form biological activated carbon); At last, enter sterilization pool, chlorination is handled.
Raw water quality and employing advanced oxidization method are handled the back effluent quality and are listed in table 3.
The water quality of table 3, former water and water outlet
| Project | Colourity/PCU | Turbidity/NTU | Total organic carbon/mgL -1 | Permanganate indices/mgL -1 | Haloform generates gesture/μ gL -1 | Halogen acetic acid generates gesture/μ gL -1 | Bromide anion μ gL -1 | Bromic acid μ gL -1 | Fenobucarb μ/gL -1 |
| Former water water outlet | 11 ＜1 | 13.6 0.15 | 1.93 1.12 | 2.84 0.87 | 108 13 | 122 20 | 18 15 | 0 ＜2 | 0.1574 0.0028 |
Claims (7)
1, a kind of method that is used for the bromine ion-containing drinking water advanced treatment is to handle successively according to ozone oxidation, coagulation, precipitation, filtration, gac, disinfectant order.
2, the method that is used for the bromine ion-containing drinking water advanced treatment as claimed in claim 1, this method specifically comprises the steps:
1) ozone oxidation: the former water feeding ozone oxidation device of required processing is carried out ozone oxidation, and the ozone reaction amount is the former water of 0.5～2.0mg/L, and be 4～15min duration of contact;
2) carry out conventional coagulation, precipitation, sand filtration processing;
3) biological activated carbon is handled: use biological activated carbon to handle, be 10～15min duration of contact;
4) sterilization.
3, the method that is used for the bromine ion-containing drinking water advanced treatment as claimed in claim 1 or 2 is characterized in that: after the ozone oxidation of described step 1), add hydrogen peroxide, the weight ratio of the add-on of hydrogen peroxide and ozone add-on is 0.05～0.25.
4, the method that is used for the bromine ion-containing drinking water advanced treatment as claimed in claim 1 or 2 is characterized in that: add lime before described step 1) is carried out ozone oxidation, the dosage of lime is 10～30ppm.
5, the method that is used for the bromine ion-containing drinking water advanced treatment as claimed in claim 1 or 2 is characterized in that: the biological activated carbon of described step 3) is column type charcoal or broken type carbon.
6, the method that is used for the bromine ion-containing drinking water advanced treatment as claimed in claim 1 or 2 is characterized in that: the sterilization of described step 4) is to adopt uv sterilisation.
7, the method that is used for the bromine ion-containing drinking water advanced treatment as claimed in claim 1 or 2 is characterized in that: the sterilization of described step 4) is to adopt chlorine, dioxide peroxide, ozone or high poly-iodine to carry out chemical disinfection as sterilizing agent.
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Cited By (10)
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| CN102276050A (en) * | 2011-05-30 | 2011-12-14 | 广东省微生物研究所 | Device for controlling ozonization byproduct bromate in packaged drinking water |
| CN102381811A (en) * | 2011-09-21 | 2012-03-21 | 哈尔滨工业大学 | Method for removing pollutants in water through stepwise catalytic oxidation-biological activated carbon-ultraviolet (UV) combination |
| CN102448893A (en) * | 2009-05-29 | 2012-05-09 | 达尼洛·卡萨利尼 | Water purification plant |
| CN102531225A (en) * | 2010-12-30 | 2012-07-04 | 青岛鑫源环保设备工程有限公司 | Integrated type all-in-one water purification plant |
| CN101613165B (en) * | 2009-07-20 | 2012-07-18 | 广东省微生物研究所 | Control method of bromate in bottled drinking water |
| CN103848535A (en) * | 2012-10-15 | 2014-06-11 | 云南省环境科学研究院 | Multimedium renewable biological filtering method and device |
| CN105948305A (en) * | 2016-05-12 | 2016-09-21 | 同济大学 | Method for reducing generation of I-DBPs (iodinated disinfection by-products) through chemical pre-oxidation |
| CN106746035A (en) * | 2017-03-09 | 2017-05-31 | 北京市市政工程设计研究总院有限公司 | A kind of drinking water algae-removing technology |
| CN107162159A (en) * | 2017-05-10 | 2017-09-15 | 同济大学 | The method that bromate generation is controlled in ozone and active carbon depth-averaged model technique |
| CN115353239A (en) * | 2022-09-14 | 2022-11-18 | 江苏永冠给排水设备有限公司 | Novel suspension light filter material water cellar water purifier |
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| CN107117701B (en) * | 2017-05-19 | 2020-07-03 | 舟山市自来水有限公司 | Method for controlling generation of bromate and trihalomethane in water treatment process |
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| CN1208260C (en) * | 2002-12-06 | 2005-06-29 | 李宁 | Sewage deeply treating process |
| CN1210215C (en) * | 2002-12-06 | 2005-07-13 | 李宁 | Process for deep treating sewage and reuse |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102448893A (en) * | 2009-05-29 | 2012-05-09 | 达尼洛·卡萨利尼 | Water purification plant |
| CN101613165B (en) * | 2009-07-20 | 2012-07-18 | 广东省微生物研究所 | Control method of bromate in bottled drinking water |
| CN102531225A (en) * | 2010-12-30 | 2012-07-04 | 青岛鑫源环保设备工程有限公司 | Integrated type all-in-one water purification plant |
| CN102276050A (en) * | 2011-05-30 | 2011-12-14 | 广东省微生物研究所 | Device for controlling ozonization byproduct bromate in packaged drinking water |
| CN102276050B (en) * | 2011-05-30 | 2013-02-27 | 广东省微生物研究所 | Device for controlling ozonization byproduct bromate in packaged drinking water |
| CN102381811A (en) * | 2011-09-21 | 2012-03-21 | 哈尔滨工业大学 | Method for removing pollutants in water through stepwise catalytic oxidation-biological activated carbon-ultraviolet (UV) combination |
| CN103848535A (en) * | 2012-10-15 | 2014-06-11 | 云南省环境科学研究院 | Multimedium renewable biological filtering method and device |
| CN103848535B (en) * | 2012-10-15 | 2015-05-20 | 云南省环境科学研究院 | Multimedium renewable biological filtering method and device |
| CN105948305A (en) * | 2016-05-12 | 2016-09-21 | 同济大学 | Method for reducing generation of I-DBPs (iodinated disinfection by-products) through chemical pre-oxidation |
| CN106746035A (en) * | 2017-03-09 | 2017-05-31 | 北京市市政工程设计研究总院有限公司 | A kind of drinking water algae-removing technology |
| CN107162159A (en) * | 2017-05-10 | 2017-09-15 | 同济大学 | The method that bromate generation is controlled in ozone and active carbon depth-averaged model technique |
| CN115353239A (en) * | 2022-09-14 | 2022-11-18 | 江苏永冠给排水设备有限公司 | Novel suspension light filter material water cellar water purifier |
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