CN1850658A - Drink-water biological treatment method of realizing synchronous nitration and counter nitration - Google Patents
Drink-water biological treatment method of realizing synchronous nitration and counter nitration Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 141
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000006396 nitration reaction Methods 0.000 title claims abstract description 22
- 230000001360 synchronised effect Effects 0.000 title 1
- 238000005273 aeration Methods 0.000 claims abstract description 53
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 31
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 31
- 239000001301 oxygen Substances 0.000 claims abstract description 31
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 14
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 60
- 239000000463 material Substances 0.000 claims description 39
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 4
- CKUAXEQHGKSLHN-UHFFFAOYSA-N [C].[N] Chemical compound [C].[N] CKUAXEQHGKSLHN-UHFFFAOYSA-N 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 abstract description 6
- 235000020188 drinking water Nutrition 0.000 abstract description 5
- 239000003651 drinking water Substances 0.000 abstract description 5
- 238000012545 processing Methods 0.000 abstract description 2
- 238000010364 biochemical engineering Methods 0.000 abstract 1
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- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 abstract 1
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 description 14
- 238000004737 colorimetric analysis Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 10
- 238000007254 oxidation reaction Methods 0.000 description 9
- 230000003647 oxidation Effects 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
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- 239000008399 tap water Substances 0.000 description 6
- 235000020679 tap water Nutrition 0.000 description 6
- 229910002651 NO3 Inorganic materials 0.000 description 5
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 5
- 238000001914 filtration Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 241000894006 Bacteria Species 0.000 description 3
- 241000282414 Homo sapiens Species 0.000 description 3
- JVMRPSJZNHXORP-UHFFFAOYSA-N ON=O.ON=O.ON=O.N Chemical compound ON=O.ON=O.ON=O.N JVMRPSJZNHXORP-UHFFFAOYSA-N 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000012851 eutrophication Methods 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 230000000813 microbial effect Effects 0.000 description 2
- 238000012552 review Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- QGZKDVFQNNGYKY-OUBTZVSYSA-N Ammonia-15N Chemical compound [15NH3] QGZKDVFQNNGYKY-OUBTZVSYSA-N 0.000 description 1
- 206010002660 Anoxia Diseases 0.000 description 1
- 241000976983 Anoxia Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention discloses a drinking water bio-processing method for implementing simultaneous nitration and denitrification, processing by biofiltration pond, and comprising the steps of: (1) regulating pH value of ammoniacal nitrogen-containing original water to 6-9; (2) determining ammoniacal nitrogen concentration in water body; (3) according to the ammoniacal nitrogen concentration, determining aeration position and controlling staying time of empty bed at 15-30 min; (4) slowly increasing aeration quantity and assuring concentration of drained water dissolved oxygen of the biofiltration pond at 1.5-2.5mg/L. And it can reduce possibility of secondary pollution and improves safety in drinking water.
Description
One, technical field
The present invention relates to a kind of drink-water biological treatment method, is a kind of drink-water biological treatment method of nitration denitrification simultaneously of realizing specifically.
Two, background technology
At present along with rapid development of economy, a large amount of trade effluents, sanitary sewage and farmland drainage enter in the natural water body, interference of human activities has caused the seriously unbalance of Nitrogen Cycling, cause intermediate product accumulation, nitrate pollution, whole ecological system and human lives have been subjected to unprecedented threat.The data that State Environmental Protection Administration provides shows that (China Environmental State Bulletin, 2004) China seven big water systems have 27.9% water body to be in bad V class water quality, is bad V class water quality and 27 emphasis Hu Ku have 10 reservoirs, accounts for 37.0%.One of outstanding behaviours of the little pollution of China's source water is exactly NH in the eutrophic water source water
4 +The severe overweight of-N.NH
4 +-N enters behind the water body can be as the nutritive substance of microorganism growth and bring out " eutrophication ", planktonic organism such as algae breeds in a large number in the water body, the sense indexs such as look, flavor that cause source water descend, and influence view, endanger hydrobiological existence, cause the disorder of water ecosystem; If can not before dispatching from the factory, effectively be removed NH
4 +-N may cause the diauxic growth of nitrobacteria as electron donor in pipe network, form microbial film, cause the decline of tap water microbiological safety, chlorination technology also can produce the disinfection byproduct (DBP) THMs that some are easy to generate mutagenicity, with ammonia nitrogen reaction meeting indirect hazard human beings'health.
Biological filter (Biological filter, BF) be a kind of novel water technology of the American-European exploitation eighties in 20th century, it has used for reference the mentality of designing of the biological contact oxidation process and the feedwater rapid filter of sewage disposal, integrate aeration, high filtering velocity, hold back characteristics such as suspended substance and regular back flushing, have load high, take up an area of less, energy consumption is low, water outlet reaches advantages such as technology simple and flexible well, existing many practical engineering application examples in the world wide.Compare with other tap water biological treatment, the characteristics of BF are (Wang Zhansheng, 1999, micro polluted source drinking water treatment: P77-P78, P133-154; Urfer et al., 1997:Biological filtration for BOM andpartical removal:a critical review; Graham, 1999:Removal of humicsubstances by oxidation/biofiltration processes-a review): (1) combines bio-oxidation and filtration, the precipitation operation is not established in the back, filter tank, realizes the periodic duty in filter tank by back flushing; (2) can effectively remove biodegradable organic in the former water (BOM); (3) lower concentration even trace organic substance there is removal effect preferably; (4) ammonia nitrogen is had very high clearance, generally more than 80%, the anti impulsion load ability is strong, is subjected to Temperature Influence also little, even under cold condition, the biological filter is to the removal of ammonia nitrogen also highly significant.
Because the advantage aspect ammonia nitrogen removal, the biological filter becomes first-selected technology in the technology of ammonia nitrogen in removing micro polluted source.Good oxygenation is the prerequisite that nitrification is carried out smoothly, guarantee ammonia-N removal rate, must give the biological filter aeration.The aeration rate deficiency, nitrification is suppressed, and often just improve operating performance by prolonging an empty bed residence time, but ammonia nitrogen removal frank is still undesirable, also can influence the treatment capacity of total system simultaneously; Aeration rate is excessive, and dissolved oxygen is too high, brings a large amount of energy consumptions, and this certainly will bring very big burden to running cost.In order to improve the removal effect of ammonia nitrogen; usually can carry out excessive aeration to the biological filter; expensive fixed investment, continue the required huge energy consumption of aeration and make the production cost of many middle-size and small-size water factories can't bear the heavy load, have to abandon biological aerated filter process and still adopt less investment, common process that running cost is low.Removing ammonia nitrogen by nitrification in the tap water biological filtering tank process in addition in fact only is the conversion of the form of nitrogen, the total amount of nitrogen does not reduce in the water body, ammonia and nitrogen pollution in also very likely will intaking is transformed into the nitrate nitrogen in the water outlet and the pollution of nitrite nitrogen, promptly may cause secondary pollution.Therefore face two problems in the ammonia nitrogen in biological filtering tank process processing micro-polluted water: will consider that suitable aeration intensity is to cut down the consumption of energy as much as possible on the one hand, the utilization ratio that promptly improves oxygen to be to guarantee certain ammonia nitrogen removal ability, and the concentration of nitric nitrogen of considering to reduce water outlet on the other hand again is to prevent secondary pollution.How to realize in BAF that nitration denitrification (SND) is the key of dealing with problems simultaneously.
Traditional biological denitrification process comprises the anti-nitration reaction that ammonia nitrogen is oxidized to the nitration reaction of nitrate nitrogen or nitrite nitrogen and nitrate nitrogen or nitrite nitrogen is reduced into nitrogen.Nitration reaction is to be finished under aerobic condition by autotrophic bacteria, and anti-nitration reaction is finished under anoxia condition by heterotrophic bacterium.Nitrification and denitrification is to carry out respectively in two or more reactors with different dissolved oxygen concentration in traditional biological denitrification process, or causes in time alternately that anoxic, aerobic environment carry out at same reactor.Need advance nitrification liquid backflow or additional carbon and replenish basicity but such technology often exists, floor space is wide, problems such as running cost height.
Dissolved oxygen concentration and distribution in bio-reactor are influence one of nitration denitrification principal elements of carrying out smoothly simultaneously.For guaranteeing the ammonia nitrogen removal effect, what often adopted the biological filter is the excessive aeration in bottom, actual moving process oxygen can not be utilized fully, nitrification mainly occurs in the front end of filter material layer, in the filter material layer of rear end since ammonia nitrogen by mass consumption, the utilization ratio of oxygen reduces greatly, and organism replaces ammonia nitrogen and utilized by some denitrifying bacteriums as electron donor, is that electron acceptor(EA) carries out biological denitrificaion with nitrate in the anaerobic environment of microbial film inside or anaerobic environment.In this case, oxygen can play restraining effect on the contrary, influences the process of biological denitrificaion.Thereby by seeking suitable gas-water ratio (aeration intensity) and aeration position to guarantee containing concentration of dissolved oxygen in the water body to realize nitration denitrification simultaneously, cut down the consumption of energy again in the time of to assurance ammonia ammonia clearance as far as possible, and improve the significant of biological denitrificaion efficient, have high economic benefit and environmental benefit.
Three, summary of the invention
1, the technical problem that will solve
Be difficult to control at BAF aeration intensity in the existing tap water biological treatment, be not operating performance for a long time good be exactly that running cost is higher, and the higher deficiency of nitrate concentration in the water outlet, keep the biological filter to contain an amount of dissolved oxygen according to different quality change aeration intensity and aeration position, a kind of drink-water biological treatment method of nitration denitrification simultaneously of realizing is provided.This method can realize nitration denitrification simultaneously in BAF, reduces the concentration of nitrate in the water outlet, improves safety of drinking water,
2, technical scheme
A kind of drink-water biological treatment method of nitration denitrification simultaneously of realizing adopts the biological filter to handle, and it comprises step:
(1) the former water pH value that will contain ammonia nitrogen is transferred to 6-9;
(2) ammonia nitrogen concentration in the mensuration water body;
(3) determine the aeration position according to the ammonia nitrogen concentration in the water inlet with reference to following table 1, the empty bed of the control residence time 15～30min;
The aeration position that adopt biological filter under the different ammonia nitrogen concentrations of table 1
| Former water ammonia nitrogen concentration (mg/L) | The aeration position |
| ＜3 | Preceding 1/3 place of filter material layer |
| 3～10 | Preceding 2/3 place of filter material layer |
| ＞10 | The bottom aeration |
(4) aeration rate slowly increases, and guarantees that the water outlet dissolved oxygen concentration of biological filter is 1.5～2.5mg/L.
The aeration position is meant that the top of filtrate is counted from the biological filter in the table 1, as preceding 1/3 place of filter material layer refer to count downwards from the filtrate top 1/3.
For the micro-polluted source water of known carbon-nitrogen ratio between 2～5, can come to control better, quickly dissolved oxygen in the water body by gas-water ratio in the table 2 and aeration position.Aeration mode in the table 2 adopts aeration tube directly to feed packing layer (being similar to perforated pipe aerating regulation), the filler cutting produces the mode of bubble, mass-transfer efficiency is not high, because different its aeration efficient of aeration mode is also different with the utilization ratio of oxygen, in the use of present technique, can suitably adjust, be controlled between 1.5～2.5mg/L with water outlet DO and be advisable according to practical situation.
Gas-water ratio and the aeration position that adopt biological filter under the different ammonia nitrogen concentrations of table 2
| Former water ammonia nitrogen concentration (mg/L) | Gas-water ratio | The aeration position |
| ＜1 | 0.5∶ 1 | Preceding 1/3 place of filter material layer |
| 1～3 | 1∶1 | Preceding 1/3 place of filter material layer |
| 3～6 | 2∶1 | Preceding 2/3 place of filter material layer |
| 6～10 | 3∶1 | Preceding 2/3 place of filter material layer |
| ＞10 | 4∶1 | The filter material layer bottom |
Gas-water ratio is meant the ratio of the volume of volume of air that aeration produces and micro-polluted water in the table 2, regulates by the flooding quantity of control airshed and biological filter.
The present invention also can realize better effect by taking following technical measures:
The former water pH value that will contain ammonia nitrogen in the aforesaid method step (1) is transferred to 7.5-8.5;
The empty bed of the control residence time 20～25min in the aforesaid method step (3);
The water outlet dissolved oxygen concentration effect between 1.8～2.4mg/L that guarantees the biological filter in the aforesaid method step (4) is good.
3, beneficial effect
The invention discloses a kind of drink-water biological treatment method of nitration denitrification simultaneously of realizing.This method has realized nitration denitrification simultaneously in BAF, has reduced the concentration of total nitrogen in the water outlet, has reduced the contribution of nitrogen to eutrophication in the water body, has reduced the concentration of nitrate in the water outlet, can reduce the possibility of secondary pollution.Improve safety of drinking water, new thinking is provided for the transformation of existing water factory, had certain popularization value.The present invention is a controlled target with the dissolved oxygen concentration in the water outlet, select suitable gas-water ratio (aeration intensity) and aeration position according to this, optimized existing biological aerated filter process, effectively utilized the utilization ratio of oxygen, when guaranteeing ammonia nitrogen removal frank, greatly reduce running cost again.
Experiment shows: carbon-nitrogen ratio is between 2～5, and water outlet dissolved oxygen operating performance between 1.5～2.5mg/L is good, and this moment, ammonia nitrogen removal frank can be reached for about 90%, and nitric efficiency is about 25%.
Four, embodiment
The present invention can be widely used in the tap water biological treatment, and the following of other in the tap water biological treatment is suitable for too to the stream plug flow reactor.Below following be example to the stream BAF, the present invention is further illustrated:
Embodiment 1
The former water pH that will contain ammonia nitrogen is transferred to 6～7, ammonia nitrogen concentration in the Na Shi colorimetric method for determining micro-polluted source water is 0.78mg/L, the aeration position is placed 1/3 place, upper end of filter material layer according to table 1, make this micro-polluted water enter the biofilter material layer, by the flow control residence time be 15～30min, slowly regulating aeration rate control water outlet dissolved oxygen concentration is 1.5～2.5mg/L.Handling back water outlet ammonia nitrogen concentration is 0.10mg/L, and water outlet nitrate nitrogen concentration is 0.44mg/L.
Embodiment 2.
The former water pH that will contain ammonia nitrogen is transferred to 8～9, ammonia nitrogen concentration in the Na Shi colorimetric method for determining micro-polluted source water is 2.81mg/L, the aeration position is placed 1/3 place, upper end of filter material layer according to table 1, make this micro-polluted water enter the biofilter material layer, by the flow control residence time be 15～30min, slowly regulating aeration rate control water outlet dissolved oxygen concentration is 1.5～2.5mg/L.Handling back water outlet ammonia nitrogen concentration is 0.42mg/L, and water outlet nitrate nitrogen concentration is 1.78mg/L.
Embodiment 3
The former water pH that will contain ammonia nitrogen is transferred to 7.5～8, ammonia nitrogen concentration in the Na Shi colorimetric method for determining micro-polluted source water is 4.99mg/L, the aeration position is placed 2/3 place, upper end of filter material layer according to table 1, make this micro-polluted water enter the biofilter material layer, by the flow control residence time be 25～30min, slowly regulating aeration rate control water outlet dissolved oxygen concentration is 1.8～2.0mg/L.Handling back water outlet ammonia nitrogen concentration is 0.46mg/L, and water outlet nitrate nitrogen concentration is 3.45mg/L.
Embodiment 4.
The former water pH that will contain ammonia nitrogen is transferred to 8～8.5, ammonia nitrogen concentration in the Na Shi colorimetric method for determining micro-polluted source water is 8.85mg/L, the aeration position is placed 2/3 place, upper end of filter material layer according to table 1, make this micro-polluted water enter the biofilter material layer, by the flow control residence time be 20～25min, slowly regulating aeration rate control water outlet dissolved oxygen concentration is 1.5～1.8mg/L.Handling back water outlet ammonia nitrogen concentration is 0.81mg/L, and water outlet nitrate nitrogen concentration is 5.43mg/L.
Embodiment 5
The former water pH that will contain ammonia nitrogen is transferred to 7.5～8.5, ammonia nitrogen concentration in the Na Shi colorimetric method for determining micro-polluted source water is 15.14mg/L, according to table 1 the aeration position is placed the filter material layer bottom, make this micro-polluted water enter the biofilter material layer, by the flow control residence time be 15～30min, slowly regulating aeration rate control water outlet dissolved oxygen concentration is 1.8～2.4mg/L.Handling back water outlet ammonia nitrogen concentration is 2.47mg/L, and water outlet nitrate nitrogen concentration is 8.45mg/L.
Embodiment 6
The former water pH that will contain ammonia nitrogen is transferred to 6～7, and the ammonia nitrogen concentration in the Na Shi colorimetric method for determining micro-polluted source water is 0.78mg/L, and the permanganate oxidation method records COD
MnBe 3.04mg/L, with this micro-polluted water biofilter material layer of flowing through, by the flow control residence time be 25min, according to table 2 the aeration position is placed 1/3 place, upper end of filter material layer, gas-water ratio 0.5: 1, water outlet this moment dissolved oxygen concentration is 1.5～2.5mg/L.Handling back water outlet ammonia nitrogen concentration is 0.07mg/L, and water outlet nitrate nitrogen concentration is 0.38mg/L.
Embodiment 7
The former water pH that will contain ammonia nitrogen is transferred to 8～9, and the ammonia nitrogen concentration in the Na Shi colorimetric method for determining micro-polluted source water is 2.81mg/L, and the permanganate oxidation method records COD
MnBe 5.97mg/L, with this micro-polluted water biofilter material layer of flowing through, by the flow control residence time be 20min, according to table 2 the aeration position is placed 1/3 place, upper end of filter material layer, gas-water ratio 1: 1, water outlet this moment dissolved oxygen concentration is 1.5～2.5mg/L.Handling back water outlet ammonia nitrogen concentration is 0.25mg/L, and water outlet nitrate nitrogen concentration is 1.53mg/L.
Embodiment 8
The former water pH that will contain ammonia nitrogen is transferred to 8.5～9, and the ammonia nitrogen concentration in the Na Shi colorimetric method for determining micro-polluted source water is 3.66mg/L, and the permanganate oxidation method records COD
MnBe 8.93mg/L, with this micro-polluted water biofilter material layer of flowing through, by the flow control residence time be 30min, according to table 2 the aeration position is placed 2/3 place, upper end of filter material layer, gas-water ratio 2: 1, water outlet this moment dissolved oxygen concentration is 1.5～2.5mg/L.Handling back water outlet ammonia nitrogen concentration is 0.30mg/L, and water outlet nitrate nitrogen concentration is 2.05mg/L.
Embodiment 9
The former water pH that will contain ammonia nitrogen is transferred to 6～6.5, and the ammonia nitrogen concentration in the Na Shi colorimetric method for determining micro-polluted source water is 4.99mg/L, and the permanganate oxidation method records COD
MnBe 11.04mg/L, with this micro-polluted water biofilter material layer of flowing through, by the flow control residence time be 15～30min, according to table 2 the aeration position is placed 2/3 place, upper end of filter material layer, gas-water ratio 2: 1, water outlet this moment dissolved oxygen concentration is 2.0～2.4mg/L.Handling back water outlet ammonia nitrogen concentration is 0.33mg/L, and water outlet nitrate nitrogen concentration is 2.95mg/L.
Embodiment 10
The former water pH that will contain ammonia nitrogen is transferred to 6～9, and the ammonia nitrogen concentration in the Na Shi colorimetric method for determining micro-polluted source water is 8.85mg/L, and the permanganate oxidation method records COD
MnBe 19.21mg/L, with this micro-polluted water biofilter material layer of flowing through, by the flow control residence time be 15～30min, according to table 2 the aeration position is placed 2/3 place, upper end of filter material layer, gas-water ratio 3: 1, water outlet this moment dissolved oxygen concentration is 1.5～2.5mg/L.Handling back water outlet ammonia nitrogen concentration is 0.84mg/L, and water outlet nitrate nitrogen concentration is 6.01mg/L.
Embodiment 11
The former water pH that will contain ammonia nitrogen is transferred to 8～9, and the ammonia nitrogen concentration in the Na Shi colorimetric method for determining micro-polluted source water is 12.08mg/L, and the permanganate oxidation method records COD
MnBe 25.37mg/L, with this micro-polluted water biofilter material layer of flowing through, by the flow control residence time be 15～30min, according to table 2 the aeration position is placed the filter material layer bottom, gas-water ratio 4: 1, water outlet this moment dissolved oxygen concentration is 1.5～2.5mg/L.Handling back water outlet ammonia nitrogen concentration is 2.27mg/L, and water outlet nitrate nitrogen concentration is 6.01mg/L.
Claims (5)
1. realize the drink-water biological treatment method of nitration denitrification simultaneously for one kind, adopt the biological filter to handle, it is characterized in that comprising step:
(1) the former water pH value that will contain ammonia nitrogen is transferred to 6-9;
(2) ammonia nitrogen concentration in the mensuration water body;
(3) determine the aeration position according to the ammonia nitrogen concentration in the water inlet with reference to following table, the empty bed of the control residence time 15～30min;
Former water ammonia nitrogen concentration (mg/L) The aeration position
＜3 Preceding 1/3 place of filter material layer
3～10 Preceding 2/3 place of filter material layer
＞10 The bottom aeration
(4) aeration rate slowly increases, and guarantees that the water outlet dissolved oxygen concentration of biological filter is 1.5～2.5mg/L.
2. a kind of drink-water biological treatment method of nitration denitrification simultaneously of realizing according to claim 1, it is characterized in that the micro-polluted source water of carbon-nitrogen ratio between 2～5, can come to control better, quickly dissolved oxygen in the water body by gas-water ratio in the following table and aeration position:
Former water ammonia nitrogen concentration (mg/L) Gas-water ratio The aeration position
＜1 0.5∶1 Preceding 1/3 place of filter material layer
1～3 1∶1 Preceding 1/3 place of filter material layer
3～6 2∶1 Preceding 2/3 place of filter material layer
6～10 3∶1 Preceding 2/3 place of filter material layer
＞10 4∶1 The filter material layer bottom
3. a kind of drink-water biological treatment method of nitration denitrification simultaneously of realizing according to claim 1 and 2 is characterized in that the former water pH value that will contain ammonia nitrogen in the step (1) is transferred to 7.5-8.5.
4. a kind of drink-water biological treatment method of nitration denitrification simultaneously of realizing according to claim 1 and 2 is characterized in that the empty bed residence time of control is 20～25min in the step (3).
5. a kind of drink-water biological treatment method of nitration denitrification simultaneously of realizing according to claim 1 and 2 is characterized in that the water outlet dissolved oxygen concentration of biological filter in the step (4) is 1.8～2.4mg/L.
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| CN112174323A (en) * | 2020-09-29 | 2021-01-05 | 昆山润淞环保科技有限公司 | Wastewater biomembrane microbubble oxygenation type high-rate trickling filtration treatment tower and process |
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|---|---|---|---|---|
| CN1215993C (en) * | 2003-05-30 | 2005-08-24 | 大连理工大学 | Batch type integrated membrane bioreactor |
| CN1267363C (en) * | 2004-07-26 | 2006-08-02 | 北京交通大学 | Sewage treatment method using sequential batch type reactor |
-
2006
- 2006-05-12 CN CNB2006100402876A patent/CN100384759C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112174323A (en) * | 2020-09-29 | 2021-01-05 | 昆山润淞环保科技有限公司 | Wastewater biomembrane microbubble oxygenation type high-rate trickling filtration treatment tower and process |
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