CN104803511A - High ammonia-nitrogen wastewater treatment device and treatment method - Google Patents
High ammonia-nitrogen wastewater treatment device and treatment method Download PDFInfo
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- CN104803511A CN104803511A CN201510185901.7A CN201510185901A CN104803511A CN 104803511 A CN104803511 A CN 104803511A CN 201510185901 A CN201510185901 A CN 201510185901A CN 104803511 A CN104803511 A CN 104803511A
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Abstract
The invention discloses a high ammonia-nitrogen wastewater treatment device and treatment method. The treatment device comprises an air pump, a reaction bottle and a gas-washing bottle, wherein wastewater is injected into the reaction bottle, the air pump pumps air into the reaction bottle, and the air is subjected to an air stripping reaction with the wastewater; the gas-washing bottle is filled with a weak phosphoric acid solution, ammonia gas produced by the air stripping reaction is introduced into the weak phosphoric acid solution, and then magnesium sulfate is added to the gas-washing bottle, after mutual reaction, magnesium-ammonium-sulfate precipitate is formed. Through the treatment device and the treatment method, ammonia gas after the air stripping reaction is treated, secondary pollution is avoided, as pure ammonia gas is formed after air stripping, so that pure magnesium-ammonium-sulfate precipitate is formed to be recycled, and with the adoption of the treatment method, the nitrogen removal efficiency is high.
Description
Technical field
The invention belongs to field of environment engineering technology, relate to sewage disposal and technology of middle water recycle, particularly a kind of high ammonia-nitrogen wastewater denitrogenation processing.
Background technology
Along with the develop rapidly of China's economy, excess nitrogen phosphorus discharges the serious eutrophication problems caused and has caused showing great attention to of people.According to statistics, in China's Main Lakes, what be in eutrophic state because of nitrogen and phosphorus pollution accounts for 56% more than of statistics lake total amount.At present, ammonia nitrogen becomes the primary index affecting China's surface water quality of water environment more than COD, the whole nation seven large water systems, 26 states' control emphasis lake (reservoir), four large sea areas immediate offshore area (except Bohai Offshore), 192 land stream sections all include ammonia nitrogen in main contamination index.In " 12 " the national economic and social development planning outline, the target that ammonia nitrogen reduces discharging 10% is clearly proposed.
In the removal of ammonia nitrogen, the method adopted both at home and abroad has traditional biological method (A/O, A
2/ O, SBR, oxidation ditch etc.), short distance nitration-denitrification method, Anammox is sent out, blow-off method, selective ion exchange method, break point chlorination, chemical precipitation method etc.But these methods all have respective limitation, particularly to oil-containing and high-concentration ammonia nitrogenous wastewater is unable to do what one wishes especially.Biochemical method cost is lower, but oils, phenols etc. in resinous shale waste water is higher, directly passes into reactor and easily causes active sludge dead; Anammox is without the need to supporting, additional organism is not needed to do electron carrier, go for the high ammonia-nitrogen wastewater of carbon source deficiency, non-secondary pollution, working cost is low, and simultaneously sludge yield decreases 90%, but due to Anammox method be run under the effect of autotrophic bacteria, its taming start time is long, and pollutant removal load is on the low side; Single blow-off method is simple to operate, efficiency is high, but easily produces secondary pollution; Ion exchange method has the advantages that technique is simple, reduced investment clearance is high, is applicable to the ammonia nitrogen waste water (<500mg/L) of middle lower concentration, but can cause operational difficulty because resin regeneration is frequent for the ammonia nitrogen waste water of high density; The most outstanding advantage of break point chlorination is by reasonably controlling chlorine dosage and to flow, remove the whole ammonia nitrogens in waste water, sterilisation purpose can also be reached simultaneously, but its high expensive, by product chloramines and chlorinatedorganic can cause secondary pollution, it is suitable for advanced nitrogen process, and ammonia nitrogen concentration is not easily too high.Chemical precipitation method is the character according to Pollutants in Wastewater, adds corresponding industrial chemicals, and general is add magnesium sulfate and potassium primary phosphate, but this process can make the phosphoric in water roll up, and produces considerable influence to follow-up biological treatment.And containing a large amount of oil and other impurity in resinous shale waste water, if directly carry out chemical precipitation, the throw out not only making precipitation obtain is impure, cannot use, and its denitrogenation processing effect is also bad.
Therefore, design a kind of better denitrification processing device and treatment process is necessary, to solve the problem.
Summary of the invention
For existing denitride technology Problems existing, the invention provides one and both can prevent secondary pollution, high ammonia-nitrogen wastewater denitrification processing device and the treatment process of pure recycling precipitate utilization can be obtained again.
To achieve these goals, the present invention adopts following technical scheme:
A kind of high ammonia-nitrogen wastewater denitrification processing device, comprise pneumatic pump, reaction flask and scrubbing bottle, described waste water is placed in described reaction flask, air passes in described reaction flask and carries out stripping reaction with described waste water by described pneumatic pump, has weak phosphoric acid solution in described scrubbing bottle, and the reacted ammonia of stripping passes in described weak phosphoric acid solution, and magnesium sulfate is added in described scrubbing bottle, form ammonium sulfate magnesium precipitate after reacting to each other.
Further, described reaction flask is placed in water-bath, has thermostat(t)ed water in described water-bath, for described reaction flask provides the temperature needed for stripping reaction.
Further, between described pneumatic pump and described reaction flask, be provided with spinner-type flowmeter, in order to control aeration rate during stripping reaction.
Further, also comprise test bottle and be communicated with described scrubbing bottle, in described test bottle, there is weak phosphoric acid solution, for testing from described scrubbing bottle ammonia in gas nitrogen content out.
Further, also comprise bio-reactor, described bio-reactor is for removing the residue ammonia nitrogen of the solution in the reacted waste water of stripping and scrubbing bottle.
Further, PH meter is all inserted in described reaction flask, described scrubbing bottle and described test bottle.
A kind of high ammonia-nitrogen wastewater denitrifying method, comprise: described waste water is injected reaction flask, heat described reaction flask and carry out stripping reaction in wherein passing into air, ammonia after stripping passes in the weak phosphoric acid solution in scrubbing bottle, and in described scrubbing bottle, add magnesium sulfate carry out magnesium ammonium phosphate sediment reaction, form magnesium ammonium phosphate sediment and reclaim.
Further, after above-mentioned steps completes, the gas in described scrubbing bottle is passed in the test bottle with weak phosphoric acid solution, then test the ammonia-nitrogen content in described test bottle, guarantee that the ammonia of stripping in described reaction flask is absorbed by described scrubbing bottle completely.
Further, reacted for stripping waste water and the reacted solution of magnesium ammonium phosphate sediment are passed in bio-reactor and processes, further denitrogenation.
Further, also comprise beaker, the ammonia of stripping first passes in described weak ammonium phosphate solution and reacts, and then pours reacted solution into beaker, is added in described beaker by magnesium sulfate and carries out magnesium ammonium phosphate sediment reaction.
Beneficial effect of the present invention:
Waste water first carries out stripping reaction with air in described reaction flask, ammonia after stripping passes in the weak phosphoric acid solution of scrubbing bottle, add magnesium sulfate again, carry out the reaction of ammonium sulfate magnesium precipitate, both can process the reacted ammonia of stripping, prevent secondary pollution, and because stripping goes out pure ammonia, and then form pure ammonium sulfate magnesium precipitate, in order to recycle, and using this treatment process, nitric efficiency is high.
Accompanying drawing explanation
Fig. 1 is high ammonia-nitrogen wastewater denitrification processing device schematic diagram of the present invention;
In figure, 1-pneumatic pump, 2-reaction flask, 3-water-bath, 4-scrubbing bottle, 5-test bottle, 6-spinner-type flowmeter.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
As shown in Figure 1, high ammonia-nitrogen wastewater denitrification processing device of the present invention comprises pneumatic pump 1, reaction flask 2, water-bath 3, scrubbing bottle 4, test bottle 5 and bio-reactor (not shown), wherein waste water is placed in reaction flask 2, reaction flask 2 is placed in water-bath 3, has thermostat(t)ed water in water-bath 3, and scrubbing bottle 4 and reaction flask 2 pass through pipeline communication, in scrubbing bottle 4, there is weak phosphoric acid solution, test bottle 5 is roughly the same with scrubbing bottle 4, and it is connected to the rear of scrubbing bottle 4, also has weak phosphoric acid solution in test bottle 5.Be provided with spinner-type flowmeter 6 between pneumatic pump 1 and reaction flask 2, in order to control the aeration rate in reaction flask 2, in reaction flask 2, scrubbing bottle 4 and test bottle 5, be all inserted with PH meter, in order to the pH value in test bottle, and then to regulate in bottle pH value at required numerical value.
High ammonia-nitrogen wastewater denitrifying method of the present invention is as follows:
First the air in pneumatic pump 1 is passed in the waste water in reaction flask 2, in water-bath 3 warm water effect under, air and waste water carry out stripping reaction in reaction flask 2, during stripping reaction, the PH of waste water is regulated to be alkalescence, because waste water in the present embodiment is resinous shale waste water, its pH value probably about 9.3, therefore does not need additional adjustment.Pure ammonia is produced in reaction flask 2 after stripping reaction, ammonia passes in the weak phosphoric acid solution in scrubbing bottle 4, generate ammonium radical ion, in scrubbing bottle 4, add appropriate Adlerika simultaneously, regulate pH value, make in scrubbing bottle 4, to carry out magnesium ammonium phosphate sediment reaction (MAP reaction), generate pure magnesium ammonium phosphate sediment, and this throw out is the main component of struvite, in order to recycle, such as, use as agricultural fertilizer.In the present embodiment, be directly in reaction flask 4, add Adlerika, in other embodiments, also can first make ammonia pass in scrubbing bottle 4 to react with weak phosphoric acid solution, then reacted solution is poured in beaker, in beaker, add Adlerika, carry out magnesium ammonium phosphate sediment reaction.
Go out ammonia in order to ensure stripping in reaction flask 2 to be absorbed by scrubbing bottle 4 completely, test bottle 5 is connected to below in scrubbing bottle 4, in test bottle 5, there is weak phosphoric acid solution, after magnesium ammonium phosphate sediment reaction, measure the ammonia-nitrogen content of liquid in test bottle 5, if wherein there is no ammonia nitrogen, to illustrate in reaction flask 2 that stripping goes out ammonia and absorbed by scrubbing bottle 4 completely; If containing ammonia nitrogen in test bottle 5, the ammonia that in the incomplete absorption reaction bottle 2 of scrubbing bottle 4, stripping goes out is described, then need to adjust spinner-type flowmeter 6, reduce air aeration amount, ammonia amount is reduced, or in scrubbing bottle 4, adds more weak phosphoric acid solution, make after scrubbing bottle 4, ammonia is absorbed substantially, and finally the ammonia-nitrogen content measured in survey 5 trial jar is not good.
After above-mentioned process completes, by the solution in the waste water in reaction flask 2 and scrubbing bottle 4, pass into according to a certain percentage in bio-reactor with sanitary sewage, owing to have passed through above-mentioned process, in waste water, most ammonia nitrogen is removed, again the solution in the waste water in reaction flask 2, scrubbing bottle 4 and sanitary sewage are added bio-reactor according to a certain percentage, carbon, the content of nitrogen and phosphorous ratio required when bio-reactor reacts can be met, alleviate and directly magnesium ammonium phosphate is added in waste water, then waste water is passed in bio-reactor produce the too much impact of phosphorus content.
When using high ammonia-nitrogen wastewater denitrification processing device of the present invention and treatment process denitrogenation, the ammonia-nitrogen content table in each container is as follows:
Can be found out by above table data, the present invention can deviate from most of the nitrogen by stripping and magnesium ammonium phosphate sediment method, pass through bio-reactor again, substantially nitrogen can be deviate from completely, and carry out magnesium ammonium phosphate sediment reaction by ammonia being passed into after stripping scrubbing bottle 4, pure magnesium ammonium phosphate can be obtained, recycle value high, and nitric efficiency is high.
Scheme in embodiment unrestricted scope of patent protection of the present invention, the Equivalent embodiments that all the present invention of disengaging do or change, be all contained in the scope of the claims of this case.
Claims (10)
1. a high ammonia-nitrogen wastewater denitrification processing device, it is characterized in that, comprise: pneumatic pump, reaction flask and scrubbing bottle, described waste water is placed in described reaction flask, and air passes in described reaction flask and carries out stripping reaction with described waste water by described pneumatic pump, in described scrubbing bottle, there is weak phosphoric acid solution, the reacted ammonia of stripping passes in described weak phosphoric acid solution, and adds magnesium sulfate in described scrubbing bottle, forms ammonium sulfate magnesium precipitate after reacting to each other.
2. high ammonia-nitrogen wastewater denitrification processing device according to claim 1, is characterized in that: described reaction flask is placed in water-bath, has thermostat(t)ed water in described water-bath, for described reaction flask provides the temperature needed for stripping reaction.
3. high ammonia-nitrogen wastewater denitrification processing device according to claim 1, is characterized in that: be provided with spinner-type flowmeter between described pneumatic pump and described reaction flask, in order to control aeration rate during stripping reaction.
4. high ammonia-nitrogen wastewater denitrification processing device according to claim 1, is characterized in that: also comprise test bottle and be communicated with described scrubbing bottle, have weak phosphoric acid solution in described test bottle, for testing from described scrubbing bottle ammonia in gas nitrogen content out.
5. high ammonia-nitrogen wastewater denitrification processing device according to claim 1, is characterized in that: also comprise bio-reactor, and described bio-reactor is for removing the residue ammonia nitrogen of the solution in the reacted waste water of stripping and scrubbing bottle.
6. high ammonia-nitrogen wastewater denitrification processing device according to claim 1, is characterized in that: all insert PH meter in described reaction flask, described scrubbing bottle and described test bottle.
7. a high ammonia-nitrogen wastewater denitrifying method, it is characterized in that, comprise: described waste water is injected reaction flask, heat described reaction flask and carry out stripping reaction in wherein passing into air, ammonia after stripping passes in the weak phosphoric acid solution in scrubbing bottle, and in described scrubbing bottle, add magnesium sulfate carry out magnesium ammonium phosphate sediment reaction, form magnesium ammonium phosphate sediment and reclaim.
8. high ammonia-nitrogen wastewater denitrifying method according to claim 7, it is characterized in that: after above-mentioned steps completes, gas in described scrubbing bottle is passed in the test bottle with weak phosphoric acid solution, then test the ammonia-nitrogen content in described test bottle, guarantee that the ammonia of stripping in described reaction flask is absorbed by described scrubbing bottle completely.
9. high ammonia-nitrogen wastewater denitrifying method according to claim 7, is characterized in that: reacted for stripping waste water and the reacted solution of magnesium ammonium phosphate sediment are passed in bio-reactor and process, further denitrogenation.
10. high ammonia-nitrogen wastewater denitrifying method according to claim 7, it is characterized in that: also comprise beaker, the ammonia of stripping first passes in described weak ammonium phosphate solution and reacts, and then pours reacted solution into beaker, is added in described beaker by magnesium sulfate and carries out magnesium ammonium phosphate sediment reaction.
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Cited By (4)
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|---|---|---|---|---|
| CN106115973A (en) * | 2016-07-26 | 2016-11-16 | 辽宁工业大学 | A kind of combination type ammonia nitrogen removal device and control method |
| CN106219651A (en) * | 2016-08-15 | 2016-12-14 | 上海交通大学 | A kind of remove the device and method of ammonia nitrogen in anaerobic digestion fermentation liquid |
| CN106430244A (en) * | 2016-11-08 | 2017-02-22 | 南京大学 | Method for recovering and purifying ammonia gas from ammonia nitrogen wastewater |
| CN106745419A (en) * | 2016-11-30 | 2017-05-31 | 江西蓝星星火有机硅有限公司 | The reactive evaporation device of ammonia in a kind of recovery sewage |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106115973A (en) * | 2016-07-26 | 2016-11-16 | 辽宁工业大学 | A kind of combination type ammonia nitrogen removal device and control method |
| CN106219651A (en) * | 2016-08-15 | 2016-12-14 | 上海交通大学 | A kind of remove the device and method of ammonia nitrogen in anaerobic digestion fermentation liquid |
| CN106219651B (en) * | 2016-08-15 | 2020-11-17 | 上海交通大学 | Device and method for removing ammonia nitrogen in anaerobic digestion fermentation liquor |
| CN106430244A (en) * | 2016-11-08 | 2017-02-22 | 南京大学 | Method for recovering and purifying ammonia gas from ammonia nitrogen wastewater |
| CN106430244B (en) * | 2016-11-08 | 2019-05-31 | 南京大学 | A method of it is recycled from ammonia nitrogen waste water and purifies ammonia |
| CN106745419A (en) * | 2016-11-30 | 2017-05-31 | 江西蓝星星火有机硅有限公司 | The reactive evaporation device of ammonia in a kind of recovery sewage |
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Application publication date: 20150729 |