CN111320269B - Method for denitrifying ammonia-containing wastewater - Google Patents
Method for denitrifying ammonia-containing wastewater Download PDFInfo
- Publication number
- CN111320269B CN111320269B CN202010202608.8A CN202010202608A CN111320269B CN 111320269 B CN111320269 B CN 111320269B CN 202010202608 A CN202010202608 A CN 202010202608A CN 111320269 B CN111320269 B CN 111320269B
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- CN
- China
- Prior art keywords
- ammonia
- containing wastewater
- nitrogen
- free
- oxidizing bacteria
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 239000002351 wastewater Substances 0.000 title claims abstract description 21
- 238000006243 chemical reaction Methods 0.000 claims abstract description 20
- 241001453382 Nitrosomonadales Species 0.000 claims abstract description 9
- 230000003647 oxidation Effects 0.000 claims abstract description 9
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 9
- IOVCWXUNBOPUCH-UHFFFAOYSA-N nitrous acid Chemical compound ON=O IOVCWXUNBOPUCH-UHFFFAOYSA-N 0.000 claims abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- -1 nitrite nitrogen Chemical compound 0.000 claims description 14
- CVTZKFWZDBJAHE-UHFFFAOYSA-N [N].N Chemical compound [N].N CVTZKFWZDBJAHE-UHFFFAOYSA-N 0.000 claims description 10
- 241000894006 Bacteria Species 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 6
- 230000001590 oxidative Effects 0.000 claims description 5
- IOVCWXUNBOPUCH-UHFFFAOYSA-M nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 244000005700 microbiome Species 0.000 claims description 2
- 230000002349 favourable Effects 0.000 claims 1
- 238000007034 nitrosation reaction Methods 0.000 abstract description 16
- 238000000034 method Methods 0.000 abstract description 4
- 238000004065 wastewater treatment Methods 0.000 abstract description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 2
- 210000003608 Feces Anatomy 0.000 description 1
- 210000002700 Urine Anatomy 0.000 description 1
- IPQVRLSXWJPESU-UHFFFAOYSA-N [N].ON=O Chemical compound [N].ON=O IPQVRLSXWJPESU-UHFFFAOYSA-N 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000035569 catabolism Effects 0.000 description 1
- 239000000149 chemical water pollutant Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 244000144972 livestock Species 0.000 description 1
- 239000010871 livestock manure Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N oxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N oxygen atom Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 244000144977 poultry Species 0.000 description 1
- 230000002035 prolonged Effects 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
Classifications
-
- 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
- C02F3/28—Anaerobic digestion processes
-
- 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
Abstract
The invention belongs to the technical field of ammonia-containing wastewater treatment, and particularly relates to a method for stably realizing partial nitrosation so as to finally realize denitrification through anaerobic ammonia oxidation. The method takes the wastewater with the concentration of free ammonia of more than 5mg-N/L as a treatment object, and utilizes the combined action of the free ammonia, ammonia oxidizing bacteria and free nitrous acid generated by nitrosation reaction of the ammonia oxidizing bacteria to realize a denitrification process which can stably realize partial nitrosation without accurately controlling reaction conditions so as to finally realize anaerobic ammonia oxidation.
Description
One, the technical field
The invention belongs to the technical field of ammonia-containing wastewater treatment, and particularly relates to a method for stably realizing partial nitrosation so as to finally realize denitrification through anaerobic ammonia oxidation.
Second, background Art
The ammonia-containing wastewater of the present invention refers to free ammonia (NH) contained therein3·H2O) wastewater with a concentration of more than 5 mg-N/L. Common ammonia-containing wastewater includes human excrement, livestock and poultry manure (urine), landfill leachate and ammonia-containing wastewater in other fields. Free ammonia in hydrated form and ammonium ions (NH)4 +) Is two forms of ammonia nitrogen compounds in ammonia-containing wastewater, and the two forms have hydrolysis equilibrium (NH)3·H2O＝NH4 ++OH-，Kb＝1.8*10-5At 25 ℃ C. The denitrification of the wastewater containing ammonia and nitrogen is an important task for treating a plurality of wastewater, and the denitrification by using the anaerobic ammonia oxidation method has the advantages of high efficiency, economy and greenness. Partial nitrosation is a precondition for realizing anaerobic ammonia oxidation and denitrification, and the partial nitrosation refers to partial oxidation of ammonia nitrogen to nitrite Nitrogen (NO) by Ammonia Oxidizing Bacteria (AOB) under the condition of oxygen2 --N) and separating the nitrite nitrogen from the residual ammonia nitrogenThe ratio is around 1.32. Many studies show that the ratio of nitrite nitrogen to ammonia nitrogen in the complete anammox reaction is 1.32 by comprehensively considering the anabolism and the catabolism of anammox bacteria. In actual wastewater treatment, partial nitrosation is a difficult matter, and it is necessary to precisely control the reaction conditions so that ammonia oxidizing bacteria are enriched and act in large quantities, and simultaneously, Nitrite Oxidizing Bacteria (NOB) are effectively inhibited so as to prevent nitrite nitrogen from being continuously oxidized to nitrate Nitrogen (NO)3 --N). However, this method can successfully carry out the final anammox denitrification. The invention aims to provide a method which can initiate and stabilize partial nitrosation without accurately controlling reaction conditions and finally realize anammox denitrification.
Third, the invention
The technical principle of the invention is that under the mode of batch treatment, the combined action of free ammonia in the ammonia-containing wastewater, ammonia oxidizing bacteria and free nitrous acid generated by nitrosation reaction of the ammonia oxidizing bacteria is utilized to inhibit nitrosation oxidizing bacteria possibly appearing in a reaction system and the oxidation of the nitrosation oxidizing bacteria to nitrous acid nitrogen, so that the stable partial nitrosation effect is realized, and a foundation is laid for the subsequent anaerobic ammonia oxidation denitrification. The method comprises the following steps:
1. the reaction vessel is established according to the method of aerobic biochemical operation. As a method for rapidly starting partial nitrosation, ammonia oxidizing bacteria may be inoculated in advance in a reaction vessel. The form in which the microorganisms are present in the reaction vessel includes, but is not limited to, an activated sludge process and a biofilm process.
2. The reaction vessel is started. Injecting the ammonia-containing wastewater into a reaction vessel, and detecting the ratio of the nitrite nitrogen to the ammonia nitrogen in the reaction vessel.
When the ratio of the nitrite nitrogen to the ammonia nitrogen is between 1.0 and 1.5, discharging 10 to 90 percent of the water in the reaction container, and re-injecting the ammonia-containing wastewater with the same amount as the discharged water. Methods of draining the reaction vessel include, but are not limited to, clarified effluent and filtered effluent.
3. The operations of water injection and water discharge as described in 2 are repeated until a stable partial nitrosation effect is obtained in the reactor.
4. The reaction vessel was run in a batch mode. As an optimized method for controlling the growth of nitrite oxidizing bacteria, the time interval of batch water feeding is discontinuously prolonged.
The invention has the following effects: obtain stable partial nitrosation effect, and the ratio of nitrite nitrogen to ammonia nitrogen is about 1.32.
Fourth, detailed description of the invention
The method and its advantages of the present invention will be further described by taking the treatment of waste water from 5-person households. In this embodiment, the amount of flushing water for toilet wastewater is about 6 liters/time, the concentration of ammonia nitrogen in the obtained wastewater is generally 200-350mg-N/L, and the concentration of free ammonia is 30-120mg/L at a pH value of 8.5-9.5. The process is implemented as follows:
1. the reactor is in the form of a moving bed biofilm reactor with an effective volume of 150 liters. The reactor is filled with clear water, and an aeration system is arranged in the container to supply oxygen for the water in the reactor.
2. The water outlet pipe of the toilet is connected with the reactor, so that water discharged from the toilet directly enters the reactor.
The implementation effect is as follows: after about 10 days, stable partial nitrosation is realized, and the measured average ratio of the nitrite nitrogen to the ammonia nitrogen in the effluent is 1.3.
Claims (2)
1. A method for denitrifying ammonia-containing wastewater is characterized by comprising the following steps: the concentration of free ammonia in the ammonia-containing wastewater is 5 mg/L; under the condition of aerobic operation, the combined action of free ammonia in the ammonia-containing wastewater and free nitrous acid generated in the reaction is utilized to inhibit the nitrite nitrogen from continuing to be converted into nitrate nitrogen under the action of microorganisms, so that favorable conditions are provided for subsequent anaerobic ammonia oxidation denitrification; intermittently injecting ammonia-containing wastewater into a reaction container, monitoring the concentration ratio of nitrite nitrogen to ammonia nitrogen in the reaction container, discharging 10-90% of water in the reaction container when the concentration ratio of nitrite nitrogen to ammonia nitrogen is 1.0-1.5, and re-injecting ammonia-containing wastewater which is equal to the discharged water; the reaction vessel is operated in a batch mode, and the growth of nitrite oxidizing bacteria is controlled by intermittently extending the time interval of batch water feed.
2. The method of claim 1, wherein: the reaction vessel may be pre-inoculated with ammonia oxidizing bacteria having good activity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010202608.8A CN111320269B (en) | 2020-03-20 | 2020-03-20 | Method for denitrifying ammonia-containing wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010202608.8A CN111320269B (en) | 2020-03-20 | 2020-03-20 | Method for denitrifying ammonia-containing wastewater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111320269A CN111320269A (en) | 2020-06-23 |
| CN111320269B true CN111320269B (en) | 2021-11-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010202608.8A Active CN111320269B (en) | 2020-03-20 | 2020-03-20 | Method for denitrifying ammonia-containing wastewater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111320269B (en) |
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| CN101671094A (en) * | 2009-10-09 | 2010-03-17 | 大连交通大学 | Single-stage whole process autotrophic denitrification sewage treatment device and technique thereof |
| CN103112949A (en) * | 2013-02-03 | 2013-05-22 | 北京工业大学 | SBR (sequencing batch reactor) semi-short-distance nitrification process control method |
| KR20150083435A (en) * | 2014-01-09 | 2015-07-17 | 가부시키가이샤 히타치세이사쿠쇼 | Operating method for wastewater treatment apparatus |
| CN105906039A (en) * | 2016-06-06 | 2016-08-31 | 中国石油天然气集团公司 | Oil refining catalyst sulfide-containing wastewater denitrification technology and application thereof |
| CN109592785A (en) * | 2018-12-28 | 2019-04-09 | 中国科学院生态环境研究中心 | Anaerobism membrane reactor-partial nitrification-Anammox combination unit and method |
| CN110078213A (en) * | 2019-05-09 | 2019-08-02 | 北京工业大学 | The apparatus and method of SBR/ anaerobic baffled reactor strengthened anaerobic ammoxidation Treating Municipal Sewage stable operation |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4693827A (en) * | 1986-03-20 | 1987-09-15 | Zimpro Inc. | Process for protection of biological nitrification systems |
| CN105417700B (en) * | 2015-11-29 | 2017-12-22 | 北京工业大学 | A kind of startup method of normal-temperature low-ammonia-nitrogen pulling flow type semi-hitrosation technique |
-
2020
- 2020-03-20 CN CN202010202608.8A patent/CN111320269B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002263689A (en) * | 2001-03-13 | 2002-09-17 | Ebara Corp | Method for treating ammonia-containing waste water and device |
| CN101050026A (en) * | 2007-04-17 | 2007-10-10 | 北京市环境保护科学研究院 | Deepness denitrogenation method for treating organic wastewater in high concentration |
| CN101671094A (en) * | 2009-10-09 | 2010-03-17 | 大连交通大学 | Single-stage whole process autotrophic denitrification sewage treatment device and technique thereof |
| CN103112949A (en) * | 2013-02-03 | 2013-05-22 | 北京工业大学 | SBR (sequencing batch reactor) semi-short-distance nitrification process control method |
| KR20150083435A (en) * | 2014-01-09 | 2015-07-17 | 가부시키가이샤 히타치세이사쿠쇼 | Operating method for wastewater treatment apparatus |
| CN105906039A (en) * | 2016-06-06 | 2016-08-31 | 中国石油天然气集团公司 | Oil refining catalyst sulfide-containing wastewater denitrification technology and application thereof |
| CN109592785A (en) * | 2018-12-28 | 2019-04-09 | 中国科学院生态环境研究中心 | Anaerobism membrane reactor-partial nitrification-Anammox combination unit and method |
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| CN111320269A (en) | 2020-06-23 |
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