CN102464400A - Ozone advanced oxidation process for emergency treatment of drinking water - Google Patents
Ozone advanced oxidation process for emergency treatment of drinking water Download PDFInfo
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- CN102464400A CN102464400A CN2010105368717A CN201010536871A CN102464400A CN 102464400 A CN102464400 A CN 102464400A CN 2010105368717 A CN2010105368717 A CN 2010105368717A CN 201010536871 A CN201010536871 A CN 201010536871A CN 102464400 A CN102464400 A CN 102464400A
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Abstract
一种用于饮用水应急处理的臭氧高级氧化工艺，该工艺具体描述如下：在臭氧氧化过程中投加负载铁的活性炭(AC-Fe)，将臭氧氧化与AC-Fe吸附结合起来，发挥两者的优势并产生积极的协同作用。向原水中投加AC-Fe，随后进入臭氧接触曝气，臭氧出水再进入常规的饮用水处理流程；或者原水直接进入装有AC-Fe层的臭氧接触塔，臭氧出水再进入常规的饮用水处理流程。与单独臭氧氧化工艺相比，该工艺可大大提高难氧化污染物的去除率。An advanced ozone oxidation process for emergency treatment of drinking water. The specific description of the process is as follows: during the ozone oxidation process, iron-loaded activated carbon (AC-Fe) is added, and the ozone oxidation and AC-Fe adsorption are combined to play two roles. advantage and create positive synergies. Add AC-Fe to the raw water, then enter the ozone contact aeration, and the ozone effluent enters the conventional drinking water treatment process; or the raw water directly enters the ozone contact tower equipped with the AC-Fe layer, and the ozone effluent enters the conventional drinking water treatment process. Compared with the single ozone oxidation process, this process can greatly improve the removal rate of refractory pollutants.
Description
Technical field
The present invention relates to a kind of ozone high grade oxidation technology, be mainly used in drinking water emergency and handle, in the ozone oxidation process, add the gac of load iron, promote ozone to decompose and generate the method that hydroxyl radical free radical improves difficult oxidize contaminants clearance.
Background technology
In recent years, Drinking Water in China water source burst Pollution accident takes place frequently, and drinking water safety has been caused huge pressure.Conventional drinking water treatment technology is difficult to guarantee the demand for security of people to drinking water quality, and the drinking water safety when being difficult to guarantee to happen suddenly pollution presses for effective water-purifying process and ensures safety of drinking water.Experimental study both domestic and external and actual production result show, contaminated water source water can only remove in the water organic 20%～30% through conventional coagulation, deposition, filtration, sterilization process.In addition, the existence of dissolved organic matter is unfavorable for destroying colloidal stability in the water, thereby conventional treatment process is to the also obviously decline of removal effect of raw water turbidity.
Ozonation technology obtains increasing application as a kind of water-purifying process of effective removal organic pollutant in the surface water processing.Ozone has very strong oxidisability; Its redox potential is 2.07V; The ozone oxidation organism comprises two kinds of approach: a kind of is the direct and pollutant reaction of ozone molecule, and a kind of is that ozone decomposes generation oxidisability stronger hydroxyl radical free radical, hydroxyl radical free radical and pollutant reaction hardly degraded organic substance.The ozone molecule oxidation has very strong selectivity, is prone to the big group of attack organism cloud density, to saturated oxidation operation ability a little less than.Thereby for the organism of some high stabilities, difficult degradation, like alcohols, lipid acid, chlorinatedorganic, polycyclic aromatic hydrocarbons and organic pesticide etc., oxidation efficiency is very low, and clearance is very low in limited treatment time of water.It is 2.80V that ozone decomposes the hydroxyl radical free radical redox potential that produces, and oxidation of organic compounds does not have selectivity.Therefore, when the burst pollution took place in the drinking water source, in the ozonation technology of drinking water plant, it was feasible that adding catalyst ozone generation hydroxyl radical free radical is removed difficult oxidize contaminants.
The MOX that the catalysis ozone molecule produces hydroxyl radical free radical mainly is that some typical transition metal oxides are (like Fe
2O
3, MnO
2, CuO, NiO, Co
3O
4, TiO
2, Al
2O
3Deng) and the noble heavy metal oxide (like Ru, Pd) of loading type.But some metal oxide oxidation catalyst effect is unsatisfactory, and a lot of loaded catalyst complex manufacturing process are while expensive raw materials.Under emergency situation, need to make simple, low in raw material cost, the superior catalyzer of catalytic effect.
Charcoal absorption is a kind of emergency handling process commonly used, when burst accident takes place, in former water, adds the Powdered Activated Carbon absorb polluted matter usually.Much report gac ability catalysis ozone, the effect of the difficult oxidize contaminants of raising ozone degradation.Activated carbon catalysis ozone is removed pollutent, can not only bring into play the adsorptive power of gac, and can produce hydroxyl radical free radical by catalysis ozone, improves the oxidation capacity of ozone.
Summary of the invention
The present invention adds the gac (AC-Fe) of load iron for tap water burst pollution incident provides a kind of effective treatment craft in the ozone oxidation process, ozone oxidation and charcoal absorption are combined, and brings into play both advantages and produces positive synergy.Method steps of the present invention is following: add the AC-Fe powder among the Xiang Yuanshui, get into the ozone contact aeration subsequently, the ozone water outlet gets into conventional drinking water treatment flow process again; Perhaps former water directly gets into the ozone contact tower that the AC-Fe layer is housed, and the ozone water outlet gets into conventional drinking water treatment flow process again.
It is following that the AC-Fe that uses in this technology prepares process: commercially available coal mass active carbon powder and iron nitrate solution mix; Place and shake after 24 hours under 25 ℃ of environment; 105 ℃ of slakings 12 hours are at last according to using technology directly to use powders A C-Fe or push granulating and use.Wherein gac is 1: 0.05 with the weight of iron ratio.
This technology is specially adapted to the removal of difficult oxidation organic pollutant, and under the condition of ozone continuous aeration, adding AC-Fe catalytic effect is comparatively obvious.Under laboratory conditions, ozone oxidation is after 30 minutes, and the AC-Fe that adds 20mg/L improves 45% than independent ozone oxidation pollutant removal.According to experimental result, during with ozone, ozone concn 1.0mg/L separately, basic identical when adding AC-Fe, ozone concn 0.5mg/L to the degradation effect of pollutent.Thus it is clear that, when ozonize difficulty oxidation organic pollutant, add the dosage that gac can reduce ozone, thereby practice thrift processing cost.And this dosage is water factory's Powdered Activated Carbon dosage commonly used, can not cause big influence to the subsequent treatment process of water factory.When therefore emergent pollution incident took place, under the situation that does not influence the normal operation of water factory, adding AC-Fe associating ozone oxidation was to remove the effective measure of pollutent.
Ozone oxidization combination AC-Fe technology also can be used for water factory's conventional processing flow process, adds AC-Fe layer or AC-Fe bed at ozone contact tank, can improve the effect that ozone is removed difficult oxidation of organic compounds.Behind load iron on the gac, in the ozone oxidation process, have the stripping of part iron, so ozone oxidization combination AC-Fe is suitable for pretreatment technology.The iron of stripping can be removed in coagulation, precipitation process like this, and the existence of iron can help to improve coagulation effect.
Description of drawings
Fig. 1 is the schema of AC-Fe catalytic ozonation technology.
Embodiment
Add the AC-Fe powder among the Xiang Yuanshui, dosage had better not surpass 20mg/L, after absorption in 30-120 minute, gets into O3 contacted oxidation pond oxidation, and organic removal is mainly accomplished in this step.Residual ozone in the water outlet can be decomposed rapidly under the effect of AC-Fe, and water outlet gets into the conventional treatment process of water factory more successively.The AC-Fe that adds removes in follow-up precipitation process of coagulation, removes through spoil disposal.
Embodiment 2
Former water gets into the ozone contact tower 1 that the AC-Fe layer is housed and carries out catalytic ozonation, and water outlet gets into follow-up conventional treatment process.Concrete treatment scheme is seen Fig. 1.
Claims (5)
1. one kind is used for the ozone high grade oxidation technology that drinking water emergency is handled; This technology specifically describes as follows: the gac (AC-Fe) that in the ozone oxidation process, adds load iron; Ozone oxidation and AC-Fe absorption are combined, bring into play both advantages and produce positive synergy.Add AC-Fe among the Xiang Yuanshui, get into the ozone contact aeration subsequently, the ozone water outlet gets into conventional drinking water treatment flow process again; Perhaps former water directly gets into the ozone contact tower that the AC-Fe layer is housed, and the ozone water outlet gets into conventional drinking water treatment flow process again.
2. according to claim 1, it is characterized in that using AC-Fe O3 catalytic oxidation organism, cardinal principle is that AC-Fe promotes ozone to decompose the generation hydroxyl radical free radical.
3. according to claim 1 and 2; It is following that AC-Fe prepares process: commercially available coal mass active carbon powder and iron nitrate solution mix; Place under 25 ℃ of environment concussion after 24 hours, 105 ℃ of slakings 12 hours are at last according to using technology directly to use powders A C-Fe or push granulating and use.Wherein gac is 1: 0.05 with the weight of iron ratio.
4. according to claim 1, it is characterized in that the AC-Fe dosage has good catalytic effect when being 20mg/L.
5. according to claim 1, ozone associating AC-Fe also can be used for the conventional processing flow process of water factory.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105967307A (en) * | 2016-05-24 | 2016-09-28 | 安徽普氏生态环境工程有限公司 | Method for catalyzing ozone to be oxidized by utilizing load type iron catalyst |
| CN111072153A (en) * | 2019-12-10 | 2020-04-28 | 浙江永续环境工程有限公司 | Desulfurization microbial inoculum and sewage treatment technology applying same |
| CN114804499A (en) * | 2022-05-25 | 2022-07-29 | 山东凤鸣桓宇环保有限公司 | Oil-containing seawater treatment process |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1868916A (en) * | 2006-06-07 | 2006-11-29 | 哈尔滨工业大学 | Catalytic ozonization water treatment method |
| CN101327985A (en) * | 2008-07-31 | 2008-12-24 | 哈尔滨工业大学 | A method for catalytic ozonation to remove organic pollutants in water |
-
2010
- 2010-11-05 CN CN2010105368717A patent/CN102464400A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1868916A (en) * | 2006-06-07 | 2006-11-29 | 哈尔滨工业大学 | Catalytic ozonization water treatment method |
| CN101327985A (en) * | 2008-07-31 | 2008-12-24 | 哈尔滨工业大学 | A method for catalytic ozonation to remove organic pollutants in water |
Non-Patent Citations (4)
| Title |
|---|
| MIN JANG ET AL.: "Preloading Hydrous Ferric Oxide into Granular Activated Carbon for Arsenic Removal", 《ENVIRONMENTAL SCIENCE & TECHNOLOGY》 * |
| 凌文翠等: "活性炭负载水合氧化铁催化臭氧氧化氧乐果", 《第十届全国水处理化学大会暨海峡两岸水处理化学研讨会论文集》 * |
| 张涛等: "水合氧化铁催化臭氧氧化去除水中痕量硝基苯", 《环境科学》 * |
| 葛磊等: "活性炭负载水合氧化铁对草甘膦吸附性能的研究", 《环境工程学报》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105967307A (en) * | 2016-05-24 | 2016-09-28 | 安徽普氏生态环境工程有限公司 | Method for catalyzing ozone to be oxidized by utilizing load type iron catalyst |
| CN111072153A (en) * | 2019-12-10 | 2020-04-28 | 浙江永续环境工程有限公司 | Desulfurization microbial inoculum and sewage treatment technology applying same |
| CN114804499A (en) * | 2022-05-25 | 2022-07-29 | 山东凤鸣桓宇环保有限公司 | Oil-containing seawater treatment process |
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Application publication date: 20120523 |