CN105461173A - Ammonia-nitrogen removing method for treating high-concentration ammonia-nitrogen waste water - Google Patents
Ammonia-nitrogen removing method for treating high-concentration ammonia-nitrogen waste water Download PDFInfo
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- CN105461173A CN105461173A CN201510947287.3A CN201510947287A CN105461173A CN 105461173 A CN105461173 A CN 105461173A CN 201510947287 A CN201510947287 A CN 201510947287A CN 105461173 A CN105461173 A CN 105461173A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/34—Treatment of water, waste water, or sewage with mechanical oscillations
- C02F1/36—Treatment of water, waste water, or sewage with mechanical oscillations ultrasonic vibrations
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/02—Temperature
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/44—Time
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
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- Environmental & Geological Engineering (AREA)
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Abstract
Provided is an ammonia-nitrogen removing method for treating high-concentration ammonia-nitrogen waste water. The method comprises the steps that two phases are adopted to conduct treatment on the ammonia-nitrogen waste water; for the first phase, namely, a physico-chemical pretreatment phase, the concentration of the high-concentration ammonia-nitrogen waste water is reduced through an ultrasonic stripping method, wherein the water temperature is 65+/-6 DEG C, and the time is 120+/-20 min; the concentration requirement of a biological denitrification method to the ammonia-nitrogen waste water is met; for the second phase, residual ammonia and nitrogen in the waste water are removed through a denitrification and nitration biological denitrification method. Due to the fact that ultrasound has the advantages of increasing and controlling the chemical reaction velocity, increasing the yield of reactants and the like, for the ultrasonic stripping method, on the basis of a traditional air stripping method, an ultrasonic degradation technology is combined with a stripping technology, and a novel efficient high-concentration ammonia-nitrogen waste water treatment technology is derived. The ammonia-nitrogen removing rate can reach 90 percent, and limitation of the ammonia-nitrogen waste water concentration in a traditional technology is made up.
Description
Technical field
The present invention relates to ammonia nitrogen waste water treatment method, especially ultrasonic stripping method and biological denitrificaion method are combined, reduce the limitation of process ammonia nitrogen waste water concentration, improve ammonia nitrogen removal efficiency.
Background technology
Traditional biological denitrificaion method is most widely used ammonia nitrogen waste water treatment method at present, is mainly used in the ammonia nitrogen waste water of lower concentration in process.Generally microorganism is removed the process of ammonia nitrogen in water is divided into ammonification stage, nitrated stage and 3 stages of denitrification stage, and its basic procedure is:
Itrogenous organic substance → ammonia nitrogen (ammonification) → nitrite nitrogen (nitrosification) → nitrate nitrogen (nitrated) → nitrite nitrogen (anti-nitrosification) → nitrogen
The ammonification stage, via different oxygen type ammonifying bacteria effect, the itrogenous organic substance in waste water removes amino, generates ammonia nitrogen, and ammonification elementary reaction is rapid, and the rate-limiting step of biological denitrificaion method is nitrification and denitrification process;
The nitrated stage (aerobic stage), this part is completed by nitrifier (comprising Nitrosomas and Nitromonas), successively comprise two processes, the mineralized nitrogen in water body is first nitrite nitrogen by Nitrosomas, Nitromonas and then nitrite nitrogen is oxidized to nitrate nitrogen.
Its reaction equation is:
Nitrosification: 2NH
4 ++ 3O
2→ 2NO
2 -+ 2H
2o+4H
+
Nitrated: 2NO
2 -+ O
2→ 2NO
3 -
In the denitrification stage (anaerobic stages), the nitrate nitrogen generated on last stage and nitrite nitrogen are reduced to nitrogen or nitrous oxide by nitrifier by this one-phase.Electron donor in denitrification process is various organic substrates (carbon source).
Its reaction equation is:
6NO
3 -+2CH
3OH→6NO
2 -+2CO
2+4H
2O
6NO
2 -+3CH
3OH→3N
2+3CO
2+3H
2O+6OH
-
Biological denitrificaion method can remove multiple nitrogenous compound, and nitrogen removal rate can reach 70% ~ 95%, and secondary pollution is little and both economical, therefore at home and abroad uses at most.
Ammonia nitrogen in waste water also exists with the form of free ammonia and ammonium radical ion, and remains following dynamic equilibrium relation:
Blow-off method is exactly the dynamic equilibrium relation utilizing the ammonia nitrogen in waste water to also exist, and by relation of disequilibrating in the reaction, reaches the object removing ammonia nitrogen.Such as, in the basic conditions, make it be moved to the left, increase the free ammonia in waste water, use blow-off method simultaneously, the ammonia nitrogen in liquid phase is constantly transferred in gas phase.Engineering process is simple, capital construction and working cost is lower, treatment effect is stablized, and reaction process does not cause secondary pollution to environment.
The ammonia nitrogen removal frank of traditional air stripping method is only 40%-50%, for the ammonia nitrogen waste water of middle and high concentration, after traditional air stripping method process, and still can not qualified discharge.
Along with the raising of industrial production technology, it is wide that ammonia nitrogen becomes source in numerous water pollutant, and a kind of material of degraded difficulty.At present, the minimizing technology of domestic main employing has traditional biological denitrogenation and materialization denitrogenation.Traditional biological denitrificaion method is mainly used in the ammonia nitrogen waste water two of lower concentration in process, and concentration for the treatment of is greater than to the high-concentration ammonia nitrogenous wastewater of 500mg/L, and traditional biological denitrogenation also exists free ammonia microbiostatic activity and increases the problems such as oxygen-supplying amount; And although the air stripping method be most widely used in materialization denitrogenation can process the ammonia nitrogen waste water of high density, there is the inefficient problem of ammonia nitrogen removal.
Summary of the invention
The present invention seeks to, propose the effective minimizing technology of the ammonia nitrogen containing high density in a kind of trade effluent, remove the ammonia nitrogen in waste water, present invention process is method ultrasonic stripping method and biological denitrificaion method combined.
Technical solution of the present invention is: a kind of method for removing ammonia nitrogen processing high-concentration ammonia nitrogenous wastewater, when processing high-concentration ammonia nitrogenous wastewater, adopts the process that two stages carry out ammonia nitrogen waste water; First stage: physico-chemical pretreatment stage, adopts ultrasonic stripping method the concentration of high-concentration ammonia nitrogenous wastewater to be reduced, the water temperature 65 ± 6 DEG C of ultrasonic stripping method, time 120 ± 20min; To reach the concentration requirement of biological denitrificaion method to ammonia nitrogen waste water; Second stage, adopts traditional biological denitrificaion method, removes the residue ammonia nitrogen in waste water, to reach last emission standard.Simultaneously through two-step pretreatment, improve the processing efficiency of ammonia nitrogen, more reduce the content of ammonia nitrogen in water outlet.
Described ultrasonic stripping method removes ammonia nitrogen, is based on hyperacoustic cavatition, ultrasonic wave and conventional air blow-off method is combined, substantially increase the removal efficiency of ammonia nitrogen.
Described ultrasonic stripping method removes ammonia nitrogen, and water temperature 65 ± 6 DEG C, time 120 ± 20min, pH are 10-13 and acoustic density is more than 0.02W/mL, and now the clearance of ammonia nitrogen is more than 82%, and the best can reach 85.69%.
Research shows, adopting the ammonia nitrogen in ultrasonic stripping method treatment of dyeing and printing, in certain limit, the ammonia nitrogen removal frank of waste water increases with the rising of initial pH, ultrasonic power and temperature.In waste water, the starting point concentration of ammonia nitrogen is 280mg/L, pH is 13, and when ultrasonic power is 100W, temperature is 30 DEG C, and when stripping time is 150min, the clearance of ammonia nitrogen is 90.78%, improves 40% than adopting separately air stripping method.Now, acoustic density is 0.1W/mL.
The predominating path of ultrasonic stripping method removal of ammonia and nitrogen is that high temperature ultrasonic pyrolytic reaction generates N
2and H
2, and air stripping goes out NH
3.The ammonia nitrogen removal frank of ultrasonic stripping method increases with the rising of the level value of the factors such as pH, temperature, acoustic density and time, and for the ammonia nitrogen solution of different starting point concentration, ultrasonic stripping method has good adaptability; The primary-slave relation of each factor that orthogonal experiment is determined is followed successively by: temperature, time, pH and ultrasonic wave acoustic energy density, optimum level value is temperature 65 DEG C, the time 120min, pH be 12 and acoustic density be 0.02W/mL, now the clearance of ammonia nitrogen is 85.69%.
In addition, relatively ultrasonic stripping method, separately ultrasonic method and these three kinds for the treatment of processs of independent blow-off method remove the situation of water middle and high concentration ammonia nitrogens, when 15min, the unit time of these three kinds of methods removes ammonia nitrogen amount and all reaches maximum value, ultrasonic stripping method is 3.39mg/min, is 1.12 times of independent ultrasonic method, 1.43 times of independent blow-off method, the energy consumption that this ultrasonic stripping method removes unit mass ammonia nitrogen is minimum, is 162.10kWhkg-1 (NH4+-N).
Therefore, for obtaining the energy consumption of higher ammonia nitrogen removal amount and reduction, ultrasonic stripping method is comparatively applicable to the ammonia nitrogen solution ammonia nitrogen removal reaction at short notice of higher starting point concentration.
Beneficial effect of the present invention: in the physico-chemical pretreatment stage, utilizes ultrasonic stripping method by the ammonia nitrogen removal in high-concentration ammonia nitrogenous wastewater.Test shows: under low initial ammonia nitrogen concentration, utilizes ultrasonic stripping method to remove the poor effect of ammonia nitrogen; And under the condition of higher initial ammonia nitrogen concentration, the clearance of ammonia nitrogen obviously rises, even can reach 90%, and along with the raising of starting point concentration, the clearance of ammonia nitrogen is in rising trend, and after stripping, ammonia nitrogen is within 100mg/L.Such ammonia nitrogen ratio just may use biochemical method process; Exchange the better of process through ammonium, in the biochemical treatment stage, adopt biological denitrificaion method, the ammonia nitrogen concentration after the process of ultrasonic stripping method just meets the requirement of biological denitrificaion method to ammonia nitrogen concentration.
There is due to ultrasonic wave the advantages such as the productive rate accelerating and control chemical reaction rate and improve reactant, ultrasonic stripping method is on the basis of conventional air blow-off method, novel, the efficient high-concentration ammonia nitrogenous wastewater treatment technology of one ultrasonic degradation technology and the coupling of stripping technology are derived.The ammonia nitrogen removal frank of this technology can reach 90%, and along with the raising of ammonia nitrogen concentration, ammonia nitrogen removal frank presents ascendant trend.Just compensate for the limitation of traditional technology in ammonia nitrogen waste water concentration.
Accompanying drawing explanation
Fig. 1 is ultrasonic denitrogenation device schema.
Fig. 2 is physico-chemical pretreatment phase flow figure.
The schema treatment stage that Fig. 3 being biochemical.
Embodiment
Below in conjunction with ammonia nitrogen waste water processing flow chart, specifically describe the general flow of the high-concentration ammonia nitrogenous wastewater process that ultrasonic stripping method and biological denitrificaion method combine.
Shown in Fig. 1,1-air pump, 2-rising pipe, 3-thermometer, 4-aeration head, 5-beaker, 6-water inlet pipe, 7-ultrasonic generator, 8-offgas duct, 9-absorption bottle.
Pretreatment stage: after entering equalizing tank containing the ammonia nitrogen waste water of high density, ultrasonic pond is promoted to by pump, steam is heated and due to the cavatition of ultra-sonic generator, ammonium salt can be converted to gaseous ammonia (free ammonia) to greatest extent by ammonia nitrogen waste water under supersound process, substantially increases follow-up ammonia-nitrogen desorption treatment effect.Through steam heat and after ultrasonication again with the ammonia nitrogen that sewage lifting deals to stripping absorption tower by pump, stripping water outlet flows to into intermediate pool, is promoted to two medium denitrogenation processing device (ammonium exchanges) by pump, the ammonia nitrogen further in removal sewage.
The biochemical treatment stage: the water outlet after the process of ultrasonic stripping method enters nitrated filter tank and carries out the nitration reaction stage, completed by nitrifier, successively comprise two processes, denitrification and nitrifying process, mineralized nitrogen in water body is first nitrite nitrogen by Nitrosomas, Nitromonas and then nitrite nitrogen is oxidized to nitrate nitrogen, finally carry out the anti-nitration reaction stage, the nitrate nitrogen generated on last stage and nitrite nitrogen are reduced to nitrogen or nitrous oxide by nitrifier by this one-phase, reach the object of process ammonia nitrogen.
Nitrification tank is provided with the pipeline that nitrification liquid is back to denitrification pond.
Claims (3)
1. processing a method for removing ammonia nitrogen for high-concentration ammonia nitrogenous wastewater, it is characterized in that, when processing high-concentration ammonia nitrogenous wastewater, adopting the process that two stages carry out ammonia nitrogen waste water; First stage: physico-chemical pretreatment stage, adopts ultrasonic stripping method the concentration of high-concentration ammonia nitrogenous wastewater to be reduced, the water temperature 65 ± 6 DEG C of ultrasonic stripping method, time 120 ± 20min; To reach the concentration requirement of biological denitrificaion method to ammonia nitrogen waste water; Second stage, adopts denitrification and nitrification biological denitrification method, removes the residue ammonia nitrogen in waste water.
2. method for removing ammonia nitrogen as claimed in claim 1, it is characterized in that described ultrasonic stripping method removes ammonia nitrogen, water temperature 65 ± 6 DEG C, time 120 ± 20min, pH are 10-13 and acoustic density is more than 0.02W/mL.
3. method for removing ammonia nitrogen as claimed in claim 1, is characterized in that stripping water outlet flows to into intermediate pool, enters denitrification and nitrification biological denitrification after being promoted to two medium denitrogenation processing device and ammonium exchange by pump again.
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| CN201510947287.3A CN105461173A (en) | 2015-12-16 | 2015-12-16 | Ammonia-nitrogen removing method for treating high-concentration ammonia-nitrogen waste water |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106746194A (en) * | 2016-12-09 | 2017-05-31 | 苏州纳贝通环境科技有限公司 | A kind of processing method of nitrogen-containing wastewater |
| CN108503122A (en) * | 2017-02-28 | 2018-09-07 | 中国石油化工股份有限公司 | A method of adding polyurethane filler processing high ammonia-nitrogen wastewater |
| CN113336317A (en) * | 2021-07-02 | 2021-09-03 | 浙江大学 | Device and method for improving ammonia nitrogen removal efficiency of moving bed biofilm by ultrasonic cavitation technology |
| CN114751534A (en) * | 2022-06-15 | 2022-07-15 | 江苏新聚环保科技有限公司 | Ammonia gas treatment method by aeration stripping and catalytic combustion |
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| JP2003053383A (en) * | 2001-08-17 | 2003-02-25 | Nippon Steel Corp | How to remove nitrogen from wastewater |
| CN101066822A (en) * | 2007-05-24 | 2007-11-07 | 上海大学 | Combined Treatment Method of High Concentration Ammonia Nitrogen Wastewater |
| KR101029713B1 (en) * | 2010-11-15 | 2011-04-18 | 한밭대학교 산학협력단 | Anaerobic Digestion Treatment System of Livestock Wastewater Using Ultrasound |
| CN102642891A (en) * | 2012-05-04 | 2012-08-22 | 上海理工大学 | Sewage treatment device and sewage treatment method |
| CN102964029A (en) * | 2012-11-19 | 2013-03-13 | 常州大学 | High-concentration ammonia-nitrogen wastewater treatment method for recycling ammonia and nitrogen and system thereof |
| CN204097281U (en) * | 2014-09-01 | 2015-01-14 | 山东源宝环保装备有限公司 | Ammonia nitrogen removing all-in-one |
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2015
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Patent Citations (6)
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| JP2003053383A (en) * | 2001-08-17 | 2003-02-25 | Nippon Steel Corp | How to remove nitrogen from wastewater |
| CN101066822A (en) * | 2007-05-24 | 2007-11-07 | 上海大学 | Combined Treatment Method of High Concentration Ammonia Nitrogen Wastewater |
| KR101029713B1 (en) * | 2010-11-15 | 2011-04-18 | 한밭대학교 산학협력단 | Anaerobic Digestion Treatment System of Livestock Wastewater Using Ultrasound |
| CN102642891A (en) * | 2012-05-04 | 2012-08-22 | 上海理工大学 | Sewage treatment device and sewage treatment method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106746194A (en) * | 2016-12-09 | 2017-05-31 | 苏州纳贝通环境科技有限公司 | A kind of processing method of nitrogen-containing wastewater |
| CN108503122A (en) * | 2017-02-28 | 2018-09-07 | 中国石油化工股份有限公司 | A method of adding polyurethane filler processing high ammonia-nitrogen wastewater |
| CN113336317A (en) * | 2021-07-02 | 2021-09-03 | 浙江大学 | Device and method for improving ammonia nitrogen removal efficiency of moving bed biofilm by ultrasonic cavitation technology |
| CN114751534A (en) * | 2022-06-15 | 2022-07-15 | 江苏新聚环保科技有限公司 | Ammonia gas treatment method by aeration stripping and catalytic combustion |
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Application publication date: 20160406 |
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