CN1207216C - Process for bio-denitrifying sewage - Google Patents
Process for bio-denitrifying sewage Download PDFInfo
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- CN1207216C CN1207216C CNB021106630A CN02110663A CN1207216C CN 1207216 C CN1207216 C CN 1207216C CN B021106630 A CNB021106630 A CN B021106630A CN 02110663 A CN02110663 A CN 02110663A CN 1207216 C CN1207216 C CN 1207216C
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Abstract
The present invention discloses a novel method for bio-denitrifying sewage. The ammonia containing sewage is divided into two parts, wherein one part directly enters an anaerobic ammonium oxidation device, and the other part enters an organism nitrifying device to oxidize the ammonia into nitrate; then the nitrate enters an anaerobic ammonium oxidation reactor. The volume ratio or the weight ratio of the ammonia containing sewage directly entering the anaerobic ammonium oxidation device to the ammonia containing sewage entering the organism nitrifying device is 1: 0.8 to 1: 1.5. The operating condition of the organism nitrifying device comprises: the temperature is from 20 DEG C to 35 DEG C, the pH value is from 7.0 to 8.5, and the hydraulic detention time is from 5 hr to 15 hr. The operating condition of the anaerobic ammonium oxidation device comprises: the temperature is from 20 DEG C to 35 DEG C, the pH value is from 7.0 to 8.5, the hydraulic detention time is from 8 hr to 18 hr, and the ratio of the concentration of the ammonia nitrogen to the concentration of nitro nitrogen is 1: 1.1 to 1: 1.5 or the ratio of the concentration of the ammonia nitrogen to the nitro nitrogen is 1: 0.8 to 1: 1.2. The method has the advantages that due to the fact that the ammonia directly serves as an electron donor of denitrifying reaction, the electron donor of the extraneous source can be omitted, the running cost can be saved, and the secondary pollution can be prevented. Because the oxygen is effectively utilized, the energy consumption of oxygen supply is reduced.
Description
Technical field
The present invention relates to a kind of process for bio-denitrifying sewage.
Background technology
Along with the development of industrial and agricultural production and the raising of living standards of the people, particularly along with the enforcement of various " vegetables-basket-works ", the quantity discharged of itrogenous organic substance sharply increases.What two stage biological was handled starts successively, and Organic pollutants have been played good containment effect.But the nitrogen content of two stage biological treat effluent is higher, still is serious environmental source of pollution.Nitrate pollution very harmful.Ammonia enters water body, not only can bring out " eutrophication ", causes the disorder of aquatic ecosystem, and can also 1. consume dissolved oxygen, causes water hypoxia; 2. influence the oxygen transmission of fish strontium, fish are caused death; 3. generate chloramines with the chlorine effect, influence cholorination and handle.After ammonia changes into nitrate, although consuming the ability of water body dissolved oxygen no longer exists, but still can cause " eutrophication ", the nitrate of polluted drinking water also may cause baby's methemoglobinemia, nitrate further is converted into nitrosamine, then have " three cause " effect, directly threatening human beings'health.Control nitrate pollution cost-effectively and become current great environmental protection problem.
Nitrated-denitrification process is adopted in the traditional biological denitrogenation usually, promptly
From microbiological angle, nitrite bacteria, nitrobacteria and denitrifying bacterium are the microbe groups of sibship wide apart, and the tie that contact takes place between them is a matrix.In above-mentioned serial response, whether nitrobacteria exists does not influence final denitrification effect, and the function of denitrifying bacterium also can be substituted by other bacterium.
Summary of the invention
The purpose of this invention is to provide a kind of process for bio-denitrifying sewage.
This method suitable treatment ammonia nitrogen concentration is the sewage of 30～1500mg/L; To contain ammonia sewage in the treating processes and be divided into two portions, a part directly enters the electron donor of anaerobic ammonium oxidation apparatus as Anammox, another part enters the biological nitration device, make ammonia oxidation become nitrate, enter the electron acceptor(EA) of anaerobic ammonia oxidation reactor as Anammox again, directly entering anaerobic ammonium oxidation apparatus is 1: 0.8～1: 1.5 with the volume ratio that contains ammonia sewage or the weight ratio that enter the biological nitration device; The operational condition of biological nitration device is: 20～35 ℃ of temperature, pH7.0～8.5, hydraulic detention time 5～15 hours; The operational condition of anaerobic ammonium oxidation apparatus is: 20～35 ℃ of temperature, and pH7.0～8.5, hydraulic detention time 8～18 hours, the ratio of ammonia nitrogen concentration and nitrite nitrogen concentration are 1: 1.1～1: 1.5 or ammonia nitrogen concentration and the ratio of nitre nitrogen concentration is 1: 0.8～1: 1.2.The biological respinse that biological denitrification method relates to is:
Bio-denitrifying sewage has promptly replaced denitrifying bacterium with anaerobic ammonium oxidizing bacteria.Carry out biological denitrificaion by nitrite bacteria and anaerobic ammonium oxidizing bacteria and have following advantage:
(1) because ammonia directly as the electron donor of anti-nitration reaction, can be removed external source electron donor (as methyl alcohol) from, both working cost can be saved, also secondary pollution can be prevented.
(2) because oxygen is utilized effectively, the oxygen supply energy consumption descends.
In nitration reaction
Oxygen-consumption is 2mol O
2/ mol NH
4 +
And in the biological denitrificaion reaction
Oxygen-consumption is reduced to 0.75mol O
2/ mol NH
4 +
(3), produce the acid amount and descend owing to part ammonia is not participated in the Anammox reaction directly through nitrification.Compare reaction formula 1 and 2 as can be known, the product of nitration reaction acid amount is 2mol H
+/ mol NH
4 +And the product acid amount of biological denitrificaion reaction only is 1mol H
+/ mol NH
4 +
In addition, in anti-nitration reaction
Producing alkali number is 1mol OH
-/ mol NO
3 -Or NO
2 -
And in the biological denitrificaion reaction
Producing alkali number is zero.
Can reduce the required chemical reagent of neutralization like this, reduce working cost, also can alleviate secondary pollution.
Description of drawings
Accompanying drawing is the biological denitrification method schema.
Embodiment
In biological denitrification method, will contain ammonia sewage and be divided into two portions, a part enters the biological nitration device, and for follow-up anaerobic ammonium oxidation apparatus provides nitrate (nitrite), another part directly enters anaerobic ammonium oxidation apparatus and carries out denitrogenation.Entering the biological nitration device is 0.8: 1～1.5: 1 with the ratio that contains ammonia sewage (volume ratio or weight ratio) that directly enters anaerobic ammonium oxidation apparatus.20～35 ℃ of the service temperatures of biological nitration device, pH7.0～8.5, hydraulic detention time 5～15 hours, sewage ammonia nitrogen concentration 30～1500mg/L.If ammonia nitrogen concentration is higher in the sewage, should adopt full mixing reactor.20～35 ℃ of the service temperatures of anaerobic ammonium oxidation apparatus, pH7.0～8.5, hydraulic detention time 8～18 hours, the ratio of sewage ammonia nitrogen concentration and nitrite nitrogen concentration are 1: 1.1～1: 1.5 or ammonia nitrogen concentration and the ratio of nitre nitrogen concentration is 1: 0.8～1: 1.2.For guaranteeing nitric efficiency, should adopt inner circulation reactor.
The fortune that biological denitrification method is done is taken temperature bright, as long as suitable operation can be removed ammonia and these two kinds of nitrate pollution things of nitrite simultaneously effectively.The ammonia nitrogen volumetric loading of nitrator is 2～3kg/m
3D; Clearance is 85～98%; The total nitrogen volumetric loading of anaerobic ammonia oxidation reactor is 1.5～2.5kg/m
3D; Ammonia nitrogen and nitre nitrogen removal efficiency are respectively 85～95% and 95～100%.
Embodiment
1, forms biological denitrification system with aerobic contact tank (2L) and anaerobic mud bed reactor (3L), with this system of simulation ammonia-containing water fortune examination.1) related parameter that has of aerobic contact tank is: 20～30 ℃, and HRT12～15 hour, water inlet pH7.5～8.0, ammonia nitrogen concentration 30～420mg/L, ammonia nitrogen volumetric loading 0.06～1.0g/L.d, ammonia nitrogen removal frank 95～100%.The related parameter that has of anaerobic mud bed reactor is: 20～30 ℃, and HRT12～18 hour, water inlet pH7.5～8.0, ammonia nitrogen concentration 30～420mg/L, nitre nitrogen concentration 35～450mg/L, total nitrogen volumetric loading 0.06～1.0g/L.d, ammonia nitrogen removal frank 90～98%, nitre nitrogen removal efficiency 96～100%.
2, form biological denitrification system with gas stripping type internal circulation biological reactor (20L) and anaerobic fluidized bed reactor (23L), with this system of anaerobically digested sludge pressing filtering liquid fortune examination.The related parameter that has of gas stripping type internal circulation biological reactor is: 20～35 ℃, and HRT5～15 hour, water inlet pH7.2～8.5, ammonia nitrogen concentration 830～1500mg/L, ammonia nitrogen volumetric loading 0.05～3.0g/L.d, ammonia nitrogen removal frank 95～100%.The related parameter that has of anaerobic fluidized bed reactor is: 20～35 ℃, and HRT8～18 hour, water inlet pH7.2～8.5, ammonia nitrogen concentration 830～1500mg/L, nitre nitrogen concentration 500～1450mg/L, ammonia nitrogen volumetric loading 0.5～2.5g/L.d, ammonia nitrogen removal frank 92～99%, nitre nitrogen removal efficiency 95～100%.
Claims (4)
1. a process for bio-denitrifying sewage is characterized in that this method suitable treatment ammonia nitrogen concentration is the sewage of 30～1500mg/L; To contain ammonia sewage in the treating processes and be divided into two portions, a part directly enters the electron donor of anaerobic ammonium oxidation apparatus as Anammox, another part enters the biological nitration device, make ammonia oxidation become nitrate, enter the electron acceptor(EA) of anaerobic ammonia oxidation reactor as Anammox again, directly entering anaerobic ammonium oxidation apparatus is 1: 0.8～1: 1.5 with the volume ratio that contains ammonia sewage or the weight ratio that enter the biological nitration device; The operational condition of biological nitration device is: 20～35 ℃ of temperature, pH7.0～8.5, hydraulic detention time 5～15 hours; The operational condition of anaerobic ammonium oxidation apparatus is: 20～35 ℃ of temperature, and pH7.0～8.5, hydraulic detention time 8～18 hours, the ratio of ammonia nitrogen concentration and nitrite nitrogen concentration are 1: 1.1～1: 1.5 or ammonia nitrogen concentration and the ratio of nitre nitrogen concentration is 1: 0.8～1: 1.2; The biological respinse that biological denitrification method relates to is:
2. a kind of biological denitrification method according to claim 1 is characterized in that the said ammonia sewage that contains that directly enters anaerobic ammonium oxidation apparatus is 1: 0.9～1: 1.2 with the volume ratio that contains ammonia sewage or the weight ratio that enter the biological nitration device.
3. a kind of biological denitrification method according to claim 1 is characterized in that biological nitration device operational condition is: 20～30 ℃ of temperature, pH7.0～8.0, hydraulic detention time 5～12 hours, sewage ammonia nitrogen concentration 30～500mg/L.
4. a kind of biological denitrification method according to claim 1, it is characterized in that the anaerobic ammonium oxidation apparatus operational condition is: 25～35 ℃ of temperature, pH7.5～8.0, hydraulic detention time 8～16 hours, the ratio of ammonia nitrogen concentration and nitrite nitrogen concentration are 1: 1.1～1: 1.4 or ammonia nitrogen concentration and the ratio of nitre nitrogen concentration is 1: 0.8～1: 1.1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021106630A CN1207216C (en) | 2002-01-25 | 2002-01-25 | Process for bio-denitrifying sewage |
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|---|---|---|---|
| CNB021106630A CN1207216C (en) | 2002-01-25 | 2002-01-25 | Process for bio-denitrifying sewage |
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| CN1207216C true CN1207216C (en) | 2005-06-22 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4910266B2 (en) * | 2004-03-01 | 2012-04-04 | 栗田工業株式会社 | Nitrification method and treatment method of ammonia-containing nitrogen water |
| JP3968589B2 (en) * | 2004-05-14 | 2007-08-29 | 株式会社日立プラントテクノロジー | Bacterial cell collection method, apparatus, acclimatization method, and wastewater treatment apparatus |
| CN100351186C (en) * | 2005-10-31 | 2007-11-28 | 南京大学 | Melthod of implementing low carbon nitrogen ratio high concentriation ammonia nitrogen waste water nitration |
| CN100526233C (en) * | 2007-01-19 | 2009-08-12 | 华南理工大学 | Anerobic ammoxidation and denitrification synergistic denitrification method for garbage leachate |
| CN102259978A (en) * | 2010-05-31 | 2011-11-30 | 中国地质大学（北京） | Reactor and method for removing nitrate from water |
| CN101967030B (en) * | 2010-09-26 | 2012-01-04 | 山东大学 | Integrated filler ammoxidation internal circulation short-distance denitrification process |
| CN102167475A (en) * | 2011-03-09 | 2011-08-31 | 桂林理工大学 | Nitrogen-containing waster water purification method |
| CN102557356B (en) * | 2012-02-16 | 2014-01-01 | 北京工业大学 | Process and method for denitrification and phosphorus removal of municipal sewage by half shortcut nitrification and anaerobic ammonium oxidation |
| CN103116011B (en) * | 2013-01-07 | 2015-05-20 | 北京工业大学 | Method for qualitatively comparing contents of NOBs (Nitrite-Oxidizing Bacteria) in different kinds of nitrosation sludge |
| CN109939548B (en) * | 2017-12-21 | 2021-11-09 | 中国石油化工股份有限公司 | Flue gas desulfurization and denitrification method and device |
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