CN1363525A - Process for bio-denitrifying sewage - Google Patents
Process for bio-denitrifying sewage Download PDFInfo
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- CN1363525A CN1363525A CN02110663A CN02110663A CN1363525A CN 1363525 A CN1363525 A CN 1363525A CN 02110663 A CN02110663 A CN 02110663A CN 02110663 A CN02110663 A CN 02110663A CN 1363525 A CN1363525 A CN 1363525A
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Abstract
A process for bio-denitrifying sewage includes such steps as feeding part of ammonia-contained sewage directly into anaerobic ammonia oxidizing unit, feeding rest of said sewage into biologically nitrating unit to oxidize ammonia to nitrate, and further feeding it into anaerobic ammonia oxidizing unit. The operating condition is 20-35 deg.C, 7.0-8.5 of pH value and 5-15 hr of stay time of biological nitrating unit, or 20-35 deg.C, 7.0-8.5 of pH value and 8-18 hr of stay time for anaerobic ammonia oxidizing unit. Its advantages include low cost, no secondary pollution and low energy consumption for supplying oxygen.
Description
Technical Field
The invention relates to a novel biological sewage denitrification method.
Background
The method is characterized in that the discharge amount of nitrogen-containing organic matters is increased rapidly along with the development of industrial and agricultural production and the improvement of the living standard of people, particularly along with the implementation of various ' cabbage son projects ', the secondary biological treatment is carried out on the horse successively, and plays a good role in restraining the pollution of the organic matters, however, the nitrogen content of the effluent water obtained by the secondary biological treatment is higher and still is a serious environmental pollution source, the harm of nitrogen pollution is great, ammonia enters the water body, not only can be used for inducing ' eutrophication ' to cause the disorder of an aquatic ecosystem, but also can be used for ① consuming dissolved oxygen to cause the hypoxia of the water body, ② influences the oxygen transfer of fish strontium to cause death of the fish, ③ is used for generating chloramine with chlorine to influence chlorination and disinfection treatment, after the ammonia is converted into nitrate, although the capacity of consuming the dissolved oxygen of the water body does not exist any more, the eutrophication can be caused, the nitrate polluting drinking water can also cause the methemoglobinemia of infants, the nitrate is further converted into nitrosamine, and has a ' three-caused ' effect ', and the.
The conventional biological denitrification usually adopts a nitrification-denitrification process, namely From a microbiological point of view, nitrosobacteria, nitrifying bacteria and denitrifying bacteria are groups of microorganisms that are distant in relationship, and the ligaments with which they are associated are the substrates. In the above-mentioned sequential reaction, the existence of nitrifying bacteria does not affect the final denitrification effect, and the function of denitrifying bacteria can be replaced by other bacteria.
Disclosure of Invention
The invention aims to provide a novel biological sewage denitrification method.
The method is suitable for treating sewage with the ammonia nitrogen concentration of 30-1500 mg/L; in the treatment process, ammonia-containing sewage is divided into two parts, wherein one part of ammonia-containing sewage directly enters an anaerobic ammonia oxidation device to be used as an electron donor for anaerobic ammonia oxidation, the other part of ammonia-containing sewage enters a biological nitrification device to be oxidized into nitrate, then enters an anaerobic ammonia oxidation reactor to be used as an electron acceptor for anaerobic ammonia oxidation, and the volume ratio or weight ratio of the ammonia-containing sewage directly entering the anaerobic ammonia oxidation device to the ammonia-containing sewage entering the biological nitrification device is 1: 0.8-1: 1.5; the operating conditions of the biological nitrification device are as follows: the temperature is 20-35 ℃,the pH value is 7.0-8.5, and the hydraulic retention time is 5-15 hours; the operating conditions of the anammox apparatus were: the temperature is 20-35 ℃, the pH value is 7.0-8.5, the hydraulic retention time is 8-18 hours, the ratio of the ammonia nitrogen concentration to the nitrite nitrogen concentration is 1: 1.1-1: 1.5 or the ratio of the ammonia nitrogen concentration tothe nitrate nitrogen concentration is 1: 0.8-1: 1.2. The novel biological denitrification method relates to the following biological reactions:
the novel biological sewage denitrification uses anaerobic ammonium oxidation bacteria to replace denitrifying bacteria. The biological denitrification by the nitrosobacteria and the anaerobic ammonium oxidation bacteria has the following advantages:
(1) as ammonia is directly used as an electron donor for denitrification reaction, an external electron donor (such as methanol) can be omitted, so that the operation cost can be saved, and secondary pollution can be prevented.
(2) Because the oxygen is effectively utilized, the energy consumption for oxygen supply is reduced. In nitration reactions (1) The oxygen consumption is 2mol O2/mol NH4 +. In the novel biological denitrification reaction (2) The oxygen consumption is reduced to 0.75mol O2/mol NH4 +。
(3) Because part of ammonia directly participates in the anaerobic ammonia oxidation reaction without nitration, the acid yield is reduced. As can be seen from comparison of reaction formulas 1 and 2, the amount of acid produced in the nitration reaction was 2mol of H+/mol NH4 +(ii) a The acid yield of the novel biological denitrification reaction isonly 1mol H+/mol NH4 +. In addition, in the denitrification reaction (3) (4) The alkali yield is 1mol OH-/mol NO3 -Or NO2 -. In the novel biological denitrification reaction (5) (6) The alkali yield is zero. Thus, the chemical reagents required for neutralization can be reduced, the operating cost can be reduced, and the secondary pollution can be reduced.
Drawings
The attached figure is a flow chart of a novel biological denitrification method.
Detailed Description
In the novel biological denitrification method, ammonia-containing sewage is divided into two parts, one part enters a biological nitrification device to provide nitrate (nitrite) for a subsequent anaerobic ammonia oxidation device, and the other part directly enters the anaerobic ammonia oxidation device for denitrification. The ratio (volume ratio or weight ratio) of the ammonia-containing sewage entering the biological nitrification device to the ammonia-containing sewage directly entering the anaerobic ammonia oxidation device is 0.8: 1-1.5: 1. The operating temperature of the biological nitrification device is 20-35 ℃, the pH value is 7.0-8.5, the hydraulic retention time is 5-15 hours, and the ammonia nitrogen concentration of the sewage is 30-1500 mg/L. If the ammonia nitrogen concentration in the sewage is high, a full mixing reactor is preferably adopted. The operating temperature of the anaerobic ammonia oxidation device is 20-35 ℃, the pH value is 7.0-8.5, the hydraulic retention time is 8-18 hours, the ratio of the sewage ammonia nitrogen concentration to the nitrite nitrogen concentration is 1: 1.1-1: 1.5 or the ratio of the ammonia nitrogen concentration to the nitrate nitrogen concentration is 1: 0.8-1: 1.2. In order to ensure the denitrification efficiency, an internal circulation reactor is preferably adopted.
The operation tests of the novel biological denitrification method show that two nitrogen pollutants, namely ammonia and nitrite, can be effectively removed at the same time as long as the operation is proper. The ammonia nitrogen volume load of the nitration reactor is 2-3 kg/m3D; the removal rate is 85-98%; the total nitrogen volume load of the anaerobic ammonia oxidation reactor is 1.5-2.5 kg/m3D; the removal rates of ammonia nitrogen and nitric nitrogen are 85-95% and 95-100% respectively.
Examples
1. An aerobic contact tank (2L) and an anaerobic sludge bed reactor (3L) form a novel biological denitrification system, and the system is operated by simulating ammonia-containing wastewater. 1) The relevant parameters of the aerobic contact tank are as follows: 20-30 ℃, HRT 12-15 hours, inlet water pH 7.5-8.0, ammonia nitrogen concentration 30-420 mg/L, ammonia nitrogen volume load 0.06-1.0 g/L.d, and ammonia nitrogen removal rate 95-100%. The relevant parameters of the anaerobic sludge bed reactor are as follows: 20-30 ℃, HRT (Rockwell temperature) for 12-18 hours, the pH value of inlet water is 7.5-8.0, the ammonia nitrogen concentration is 30-420 mg/L, the nitrate nitrogen concentration is 35-450 mg/L, the total nitrogen volume load is 0.06-1.0 g/L.d, the ammonia nitrogen removal rate is 90-98%, and the nitrate nitrogen removal rate is 96-100%.
2. A novel biological denitrification system is formed by an air stripping type internal circulation bioreactor (20L) and an anaerobic fluidized bed reactor (23L), and the system is operated by anaerobic digestion sludge press filtrate. The relevant parameters of the air stripping type internal circulation bioreactor are as follows: 20-35 ℃, HRT 5-15 hours, inlet water pH 7.2-8.5, ammonia nitrogen concentration 830-1500 mg/L, ammonia nitrogen volume load 0.05-3.0 g/L.d, and ammonia nitrogen removal rate 95-100%. The relevant parameters of the anaerobic fluidized bed reactor are: 20-35 ℃, HRT (Rockwell hardness) for 8-18 hours, inlet water pH is 7.2-8.5, ammonia nitrogen concentration is 830-1500 mg/L, nitrate nitrogen concentration is 500-1450 mg/L, ammonia nitrogen volume load is 0.5-2.5 g/L.d, ammonia nitrogen removal rate is 92-99%, and nitrate nitrogen removal rate is 95-100%.
Claims (4)
1. A novel biological denitrification method for sewage is characterized in that the method is suitable for treating sewage with the ammonia nitrogen concentration of 30-1500 mg/L; in the treatment process, ammonia-containing sewage is divided into two parts, and one part of ammonia-containing sewage directly enters an anaerobic ammonia oxidation device to be used as electron supply for anaerobic ammonia oxidationThe other part of the ammonia enters a biological nitrification device to oxidize the ammonia into nitrate, then enters an anaerobic ammonia oxidation reactor to be used as an electron acceptor for anaerobic ammonia oxidation, and the volume ratio or the weight ratio of the ammonia-containing sewage directly entering the anaerobic ammonia oxidation device to the ammonia-containing sewage entering the biological nitrification device is 1: 0.8-1: 1.5; the operating conditions of the biological nitrification device are as follows: the temperature is 20-35 ℃, the pH value is 7.0-8.5, andthe hydraulic retention time is 5-15 hours; the operating conditions of the anammox apparatus were: the temperature is 20-35 ℃, the pH value is 7.0-8.5, the hydraulic retention time is 8-18 hours, the ratio of the ammonia nitrogen concentration to the nitrite nitrogen concentration is 1: 1.1-1: 1.5 or the ratio of the ammonia nitrogen concentration to the nitrate nitrogen concentration is 1: 0.8-1: 1.2. The novel biological denitrification method relates to the following biological reactions:
2. the method of claim 1, wherein the volume ratio or weight ratio of the ammonia-containing wastewater directly fed to the anammox apparatus to the ammonia-containing wastewater fed to the biological nitrification apparatus is 1: 0.9 to 1: 1.2.
3. The novel biological nitrogen removal method according to claim 1, wherein the operating conditions of the biological nitrification apparatus are as follows: the temperature is 20-30 ℃, the pH value is 7.0-8.0, the hydraulic retention time is 5-12 hours, and the ammonia nitrogen concentration of the sewage is 30-500 mg/L.
4. The method of claim 1, wherein the anammox apparatus is operated under the following conditions: the temperature is 25-35 ℃, the pH value is 7.5-8.0, the hydraulic retention time is 8-16 hours, the ratio of the ammonia nitrogen concentration to the nitrite nitrogen concentration is 1: 1.1-1: 1.4 or the ratio of the ammonia nitrogen concentration to the nitrate nitrogen concentration is 1: 0.8-1: 1.1.
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| Application Number | Priority Date | Filing Date | Title |
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| 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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| CN1363525A true CN1363525A (en) | 2002-08-14 |
| CN1207216C CN1207216C (en) | 2005-06-22 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN1926072B (en) * | 2004-03-01 | 2010-04-14 | 栗田工业株式会社 | Method of nitrifying ammonium-nitrogen-containing water and method of treating the same |
| CN101445293B (en) * | 2004-05-14 | 2010-11-10 | 株式会社日立工业设备技术 | Method and apparatus for collecting bacterial cells, method for acclimatizing bacterial cells, and wastewater treatment equipment |
| CN101967030A (en) * | 2010-09-26 | 2011-02-09 | 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 |
| CN102259978A (en) * | 2010-05-31 | 2011-11-30 | 中国地质大学（北京） | Reactor and method for removing nitrate from water |
| CN102557356A (en) * | 2012-02-16 | 2012-07-11 | 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 |
| CN103116011A (en) * | 2013-01-07 | 2013-05-22 | 北京工业大学 | Method for qualitatively comparing contents of NOBs (Nitrite-Oxidizing Bacteria) in different kinds of nitrosation sludge |
| CN109939548A (en) * | 2017-12-21 | 2019-06-28 | 中国石油化工股份有限公司 | A kind of flue gas desulfurization and denitration method and device |
-
2002
- 2002-01-25 CN CNB021106630A patent/CN1207216C/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1926072B (en) * | 2004-03-01 | 2010-04-14 | 栗田工业株式会社 | Method of nitrifying ammonium-nitrogen-containing water and method of treating the same |
| CN101445293B (en) * | 2004-05-14 | 2010-11-10 | 株式会社日立工业设备技术 | Method and apparatus for collecting bacterial cells, method for acclimatizing bacterial cells, and wastewater treatment equipment |
| 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 |
| CN101967030A (en) * | 2010-09-26 | 2011-02-09 | 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 |
| CN102557356A (en) * | 2012-02-16 | 2012-07-11 | 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 |
| CN103116011A (en) * | 2013-01-07 | 2013-05-22 | 北京工业大学 | Method for qualitatively comparing contents of NOBs (Nitrite-Oxidizing Bacteria) in different kinds of nitrosation sludge |
| 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 |
| CN109939548A (en) * | 2017-12-21 | 2019-06-28 | 中国石油化工股份有限公司 | A kind of flue gas desulfurization and denitration method and device |
| 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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| Publication number | Publication date |
|---|---|
| CN1207216C (en) | 2005-06-22 |
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