CN108191056B - Desulfurization and denitrification method for desulfurization and denitrification wastewater and ammonia nitrogen wastewater - Google Patents
Desulfurization and denitrification method for desulfurization and denitrification wastewater and ammonia nitrogen wastewater Download PDFInfo
- Publication number
- CN108191056B CN108191056B CN201810093467.3A CN201810093467A CN108191056B CN 108191056 B CN108191056 B CN 108191056B CN 201810093467 A CN201810093467 A CN 201810093467A CN 108191056 B CN108191056 B CN 108191056B
- Authority
- CN
- China
- Prior art keywords
- wastewater
- denitrification
- desulfurization
- concentration
- ammonia nitrogen
- 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.)
- Active
Links
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
- C02F3/286—Anaerobic digestion processes including two or more steps
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Biodiversity & Conservation Biology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention belongs to the technical field of industrial wastewater treatment and resource utilization, and particularly relates to a method for preparing a composite materialThe desulfurization and denitrification method of desulfurization and denitrification wastewater and ammonia nitrogen wastewater comprises the following steps: will contain SO2、NOxAfter the industrial flue gas denitration and wet desulphurization treatment, the desulphurization and denitration wastewater containing sulfate and nitrate is generated, wherein the concentration of the sulfate in the desulphurization and denitration wastewater is 50-1500mg/L, the concentration of the nitrate in the desulphurization and denitration wastewater is 20-1000mg/L, and the COD concentration is 50-1000 mg/L; the invention can treat two kinds of waste water simultaneously, has good treatment effect and saves water treatment cost.
Description
Technical Field
The invention belongs to the technical field of industrial wastewater treatment and resource utilization, and particularly relates to a desulfurization and denitrification method for desulfurization and denitrification wastewater and ammonia nitrogen wastewater.
Background
Coal-fired boilers are used in most industrial production in China, a large amount of flue gas containing sulfur dioxide and nitrogen oxides is required to be subjected to desulfurization, denitrification and purification, and according to data of 2015 national environmental statistics bulletin, the total emission amount of industrial SO2 in China is up to 1556.7 ten thousand tons, and the total emission amount of nitrogen oxides in China is up to 1180.9 thousand tons. Along with the implementation of a series of relevant environmental protection regulation standards such as air pollution prevention action plan (ten air regulations for short) in China, new air pollutant emission standard (GB 13223-2011) in thermal power plants, special emission limit value and environmental air quality standard (GB 3095-2012), the construction of flue gas desulfurization and denitration facilities is gradually improved, and the subsequent desulfurization and denitration wastewater containing nitrate and sulfate is also discharged in large quantity, so that secondary pollution is easily caused.
At present, the adopted treatment methods of the flue gas desulfurization and denitrification wastewater comprise a physical method and a chemical method, and the physical method and the chemical method have high material consumption and low economical efficiency, and are difficult to discharge sulfate and nitrate pollutants in the wastewater after reaching standards, so that the prior art needs further improvement.
Disclosure of Invention
The invention aims to provide a desulfurization and denitrification method for treating two kinds of wastewater simultaneously, which has good treatment effect and high economic benefit.
Based on the purpose, the invention adopts the following technical scheme:
a desulfurization and denitrification method for desulfurization and denitrification wastewater and ammonia nitrogen wastewater comprises the following steps:
(1) will contain SO2、NOxAfter the industrial flue gas denitration and wet desulphurization treatment, the desulphurization and denitration wastewater containing sulfate and nitrate is generated, wherein the concentration of the sulfate in the desulphurization and denitration wastewater is 50-1500mg/L, and the concentration of the nitrate in the desulphurization and denitration wastewater is 20-1000 mg/L;
(2) uniformly mixing the desulfurization and denitrification wastewater containing sulfate and nitrate in the step (1) with ammonia nitrogen wastewater discharged in industry, wherein the COD concentration in the ammonia nitrogen wastewater is 50-1000 mg/L;
(3) and (3) pumping the mixed wastewater in the step (2) into an anoxic short-range denitrification tank through a wastewater pump for short-range denitrification treatment, then feeding into a sludge anaerobic biological reaction tank containing 30-40% of sulfate type anaerobic ammonium oxidation bacteria and 30-60% of nitrite reduction anaerobic ammonium oxidation bacteria, and performing solid-liquid separation on the wastewater introduced into the anaerobic biological reaction tank to recover elemental sulfur, wherein the hydraulic retention time of the wastewater is 5-10h, the pH is 7-8, and the temperature is 28-30 ℃.
Further, the sludge concentration in the sludge anaerobic biological reaction tank after the wastewater is introduced in the step (3) is 4000-5000 mg/L.
Further, the concentration of ammonia nitrogen in the mixed wastewater is 50-800mg/L, the molar ratio of ammonia nitrogen to sulfate is 2-4:1, and the molar ratio of COD to nitrate is 1.5-4.5: 1.
Further, the short-range denitrification treatment is to introduce the wastewater uniformly mixed in the step (2) into an anoxic short-range denitrification tank, after the uniformly mixed wastewater is introduced, the sludge concentration in the anoxic short-range denitrification tank is 5000-6000mg/L, the sludge contains 40-60% of denitrifying bacteria, the hydraulic retention time of the wastewater is 5-6h, the pH value is 7-7.5, and the temperature is 25-30 ℃.
The method can fully utilize the carbon source in the desulfurization and denitrification wastewater after the denitrification and wet desulfurization treatment, and can degrade the nitrogen and sulfur pollutants in the two types of wastewater simultaneously, so that the method has the advantages of high efficiency, low energy consumption, simple process, no secondary pollution, and high environmental benefit and economic benefit.
Detailed Description
Example 1:
a desulfurization and denitrification method for desulfurization and denitrification wastewater and ammonia nitrogen wastewater comprises the following steps:
(1) will contain SO2、NOxAfter the industrial flue gas denitration and wet desulphurization treatment, the desulphurization and denitration wastewater containing sulfate and nitrate is generated, wherein the concentration of the sulfate in the desulphurization and denitration wastewater is 50mg/L, and the concentration of the nitrate in the desulphurization and denitration wastewater is 20 mg/L;
(2) uniformly mixing the desulfurization and denitrification wastewater containing sulfate and nitrate in the step (1) with ammonia nitrogen wastewater discharged in industry, wherein the concentration of ammonia nitrogen in the mixed wastewater is 50-800mg/L, the molar ratio of ammonia nitrogen to sulfate is 2:1, the molar ratio of COD to nitrate is 1.5:1, and the concentration of COD in the ammonia nitrogen wastewater is 50 mg/L.
(3) The wastewater mixed in the step (2) enters an anoxic short-range denitrification tank through a wastewater pump for short-range denitrification treatment, the short-range denitrification treatment is to introduce the uniformly mixed wastewater into the anoxic short-range denitrification tank, after the uniformly mixed wastewater is introduced, the sludge concentration in the anoxic short-range denitrification tank is 5000mg/L, the sludge contains 40% of denitrifying bacteria, the hydraulic retention time of the wastewater introduced into the anoxic short-range denitrification tank is 5h, the pH is 7, the temperature is 25 ℃, then the wastewater enters a sludge anaerobic biological reaction tank containing 30% -40% of sulfate type anaerobic ammonium oxidation bacteria and 30% of nitrite reduction anaerobic ammonium oxidation bacteria, the hydraulic retention time of the wastewater introduced into the anaerobic biological reaction tank is 5h, the pH is 7, the temperature is 28 ℃, then the wastewater is subjected to solid-liquid separation, and elemental sulfur is recovered, the sludge concentration is 4000mg/L, wherein the total removal rates of ammonia nitrogen, sulfate, nitrate and organic matters are respectively 97.3%, 95.7%, 97.7% and 96.6%.
Example 2:
a desulfurization and denitrification method for desulfurization and denitrification wastewater and ammonia nitrogen wastewater comprises the following steps:
(1) will contain SO2、NOxAfter the industrial flue gas denitration and wet desulphurization treatment, the desulphurization and denitration wastewater containing sulfate and nitrate is generated, wherein the concentration of the sulfate in the desulphurization and denitration wastewater is 775mg/L, and the concentration of the nitrate in the desulphurization and denitration wastewater is 510 mg/L;
(2) uniformly mixing the desulfurization and denitrification wastewater containing sulfate and nitrate in the step (1) with ammonia nitrogen wastewater discharged in industry, wherein the ammonia nitrogen concentration in the mixed wastewater is 425mg/L, the molar ratio of ammonia nitrogen to sulfate is 3:1, the molar ratio of COD to nitrate is 3.5:1, and the COD concentration in the ammonia nitrogen wastewater is 525 mg/L.
(3) The wastewater mixed in the step (2) enters an anoxic short-range denitrification tank through a wastewater pump for short-range denitrification treatment, the short-range denitrification treatment is to introduce the uniformly mixed wastewater into the anoxic short-range denitrification tank, after the uniformly mixed wastewater is introduced, the sludge concentration in the anoxic short-range denitrification tank is 5500mg/L, the sludge contains 50% of denitrifying bacteria, the hydraulic retention time of the wastewater introduced into the anoxic short-range denitrification tank is 5.5h, the pH is 7.2, the temperature is 28 ℃, the wastewater then enters a sludge anaerobic biological reaction tank containing 35% of sulfate type anaerobic ammonium oxidation bacteria and 45% of nitrite reducing anaerobic ammonium oxidation bacteria, the hydraulic retention time of the wastewater introduced into the anaerobic biological reaction tank is 7.5h, the pH is 7.5, the temperature is 29 ℃, then the wastewater is subjected to solid-liquid separation, elemental sulfur is recovered, the sludge concentration is 4500mg/L, wherein the total removal rates of ammonia nitrogen, sulfate, nitrate and organic matters are respectively 96.9%, 95.3%, 97.1% and 96.8%.
Example 3:
a desulfurization and denitrification method for desulfurization and denitrification wastewater and ammonia nitrogen wastewater comprises the following steps:
(1) will contain SO2、NOxDenitration and denitration of industrial flue gasAfter wet desulfurization treatment, desulfurization and denitrification wastewater containing sulfate and nitrate is generated, wherein the concentration of the sulfate in the desulfurization and denitrification wastewater is 1500mg/L, and the concentration of the nitrate in the desulfurization and denitrification wastewater is 1000 mg/L;
(2) uniformly mixing the desulfurization and denitrification wastewater containing the sulfate and the nitrate in the step (1) with ammonia nitrogen wastewater discharged in industry, wherein the concentration of ammonia nitrogen in the mixed wastewater is 800mg/L, the molar ratio of ammonia nitrogen to the sulfate is 4:1, the molar ratio of COD to the nitrate is 4.5:1, and the concentration of COD in the ammonia nitrogen wastewater is 1000 mg/L.
(3) The wastewater mixed in the step (2) enters an anoxic short-range denitrification tank through a wastewater pump for short-range denitrification treatment, the short-range denitrification treatment is to introduce the uniformly mixed wastewater into the anoxic short-range denitrification tank, after the uniformly mixed wastewater is introduced, the sludge concentration in the anoxic short-range denitrification tank is 6000mg/L, the sludge contains 60% of denitrifying bacteria, the hydraulic retention time of the wastewater introduced into the anoxic short-range denitrification tank is 6h, the pH is 7.5, the temperature is 30 ℃, then the wastewater enters a sludge anaerobic biological reaction tank containing 40% of sulfate type anaerobic ammonium oxidation bacteria and 60% of nitrite reduction anaerobic ammonium oxidation bacteria, the hydraulic retention time of the wastewater introduced into the anaerobic biological reaction tank is 10h, the pH is 8, the temperature is 30 ℃, then the wastewater is subjected to solid-liquid separation, and elemental sulfur is recovered, the sludge concentration is 5000mg/L, wherein the total removal rates of ammonia nitrogen, sulfate, nitrate and organic matters are respectively 95.9%, 96.3%, 98.1% and 97.8%.
Claims (4)
1. A desulfurization and denitrification method for desulfurization and denitrification wastewater and ammonia nitrogen wastewater is characterized by comprising the following steps:
(1) will contain SO2After the industrial flue gas denitration and wet desulphurization treatment of NOx, the desulphurization and denitration wastewater containing sulfate and nitrate is generated, wherein the concentration of the sulfate in the desulphurization and denitration wastewater is 50-1500mg/L, and the concentration of the nitrate in the desulphurization and denitration wastewater is 20-1000 mg/L;
(2) uniformly mixing the desulfurization and denitrification wastewater containing sulfate and nitrate in the step (1) with ammonia nitrogen wastewater discharged in industry, wherein the COD concentration in the ammonia nitrogen wastewater is 50-1000 mg/L;
(3) and (3) pumping the mixed wastewater in the step (2) into an anoxic short-range denitrification tank through a wastewater pump for short-range denitrification treatment, then feeding into a sludge anaerobic biological reaction tank containing 30-40% of sulfate type anaerobic ammonium oxidation bacteria and 30-60% of nitrite reduction anaerobic ammonium oxidation bacteria, and performing solid-liquid separation on the wastewater introduced into the anaerobic biological reaction tank to recover elemental sulfur, wherein the hydraulic retention time of the wastewater is 5-10h, the pH is 7-8, and the temperature is 28-30 ℃.
2. The method for desulfurization and denitrification with wastewater containing ammonia nitrogen as set forth in claim 1, wherein the concentration of sludge in the anaerobic biological reaction tank for sludge after wastewater introduction in step (3) is 4000-5000 mg/L.
3. The method for removing sulfur and nitrogen from wastewater containing sulfur and nitrogen as claimed in claim 1, wherein the concentration of ammonia nitrogen in the wastewater mixed in step (2) is 50-800mg/L, the molar ratio of ammonia nitrogen to sulfate is 2-4:1, and the molar ratio of COD to nitrate is 1.5-4.5: 1.
4. The method as claimed in claim 1, wherein the short-cut denitrification treatment comprises introducing the wastewater uniformly mixed in the step (2) into an anoxic short-cut denitrification tank, wherein after the wastewater uniformly mixed is introduced, the sludge concentration in the anoxic short-cut denitrification tank is 5000-6000mg/L, the sludge contains 40-60% of denitrifying bacteria, the hydraulic retention time of the wastewater is 5-6h, the pH value is 7-7.5, and the temperature is 25-30 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810093467.3A CN108191056B (en) | 2018-01-31 | 2018-01-31 | Desulfurization and denitrification method for desulfurization and denitrification wastewater and ammonia nitrogen wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810093467.3A CN108191056B (en) | 2018-01-31 | 2018-01-31 | Desulfurization and denitrification method for desulfurization and denitrification wastewater and ammonia nitrogen wastewater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108191056A CN108191056A (en) | 2018-06-22 |
| CN108191056B true CN108191056B (en) | 2020-02-14 |
Family
ID=62591403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810093467.3A Active CN108191056B (en) | 2018-01-31 | 2018-01-31 | Desulfurization and denitrification method for desulfurization and denitrification wastewater and ammonia nitrogen wastewater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108191056B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108862622A (en) * | 2018-06-25 | 2018-11-23 | 苏州科技大学 | A kind of method of ammonia-containing water denitrogenation |
| CN110316824B (en) * | 2019-08-07 | 2022-03-25 | 大连海事大学 | Cooperative treatment device and cooperative treatment method for ship waste gas washing waste liquid and ship domestic sewage |
| CN110316896A (en) * | 2019-08-13 | 2019-10-11 | 北京中航泰达环保科技股份有限公司 | Dry reactive coke/charcoal desulphurization denitration rich gas pretreated waste water processing system |
| CN111302566A (en) * | 2020-03-09 | 2020-06-19 | 苏州中晟环境修复股份有限公司 | Sulfur autotrophic short-cut denitrification desulfurization wastewater treatment method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003033796A (en) * | 2001-07-26 | 2003-02-04 | Kurita Water Ind Ltd | Biological denitration method |
| CN101708926A (en) * | 2009-12-14 | 2010-05-19 | 广东省微生物研究所 | Method for biologically treating wastewater by simultaneously desulfurizing, denitrifying and decoloring |
| CN102923853A (en) * | 2012-11-06 | 2013-02-13 | 沈阳建筑大学 | Waste water treatment method of sulfur autotrophic denitrification-anaerobic ammonia oxidation coupling desulphuration denitrification |
-
2018
- 2018-01-31 CN CN201810093467.3A patent/CN108191056B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003033796A (en) * | 2001-07-26 | 2003-02-04 | Kurita Water Ind Ltd | Biological denitration method |
| CN101708926A (en) * | 2009-12-14 | 2010-05-19 | 广东省微生物研究所 | Method for biologically treating wastewater by simultaneously desulfurizing, denitrifying and decoloring |
| CN102923853A (en) * | 2012-11-06 | 2013-02-13 | 沈阳建筑大学 | Waste water treatment method of sulfur autotrophic denitrification-anaerobic ammonia oxidation coupling desulphuration denitrification |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108191056A (en) | 2018-06-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108191056B (en) | Desulfurization and denitrification method for desulfurization and denitrification wastewater and ammonia nitrogen wastewater | |
| CN101708926B (en) | Method for biologically treating wastewater by simultaneously desulfurizing, denitrifying and decoloring | |
| CN100360212C (en) | Waste gas control method by removing sulfur dioxide for resource utilization | |
| EP2998277B1 (en) | Method for treating biological materials associated with the wastewater purification cycle | |
| CN108191050B (en) | Low-consumption cooperative treatment method for flue gas desulfurization wastewater and ammonia nitrogen wastewater | |
| CN104607029A (en) | Synchronous flue gas desulfurization and denitrification process combining chemical absorption with anaerobic-aerobic conversion | |
| CN108996865B (en) | Pretreatment method and device for biogas production from sludge | |
| CN105664701A (en) | Method for resourcefully using coking wastewater for preparing ammonia-hydrocarbon denitrifying agent | |
| CN204125291U (en) | A kind of Waste Water Treatment | |
| CN101637688B (en) | Treatment method and device for waste gas containing nitrogen oxides | |
| CN103420480A (en) | Anaerobic molysite biological nitrogen removal process | |
| CN109943377B (en) | Method for synchronously purifying and enhancing sewage denitrification by using nitrite as electron acceptor | |
| CN113479989B (en) | Pretreatment method for coal gas water seal water pipeline | |
| CN112939352B (en) | Treatment method of comprehensive sewage of industrial park | |
| CN104250053B (en) | A kind of process is containing the method for ammonia nitrogen mutual-amido two polyaniline factory effluent | |
| CN111302566A (en) | Sulfur autotrophic short-cut denitrification desulfurization wastewater treatment method | |
| CN108706672B (en) | Recycling treatment method of ammonia nitrogen wastewater | |
| CN114455722B (en) | Full-flow biochemical treatment and reclaimed water recycling process for ink-jet printing wastewater | |
| CN105668755A (en) | Method for resourcefully using vanadium extracting wastewater for producing ammonia-hydrocarbon denitrifying agent | |
| CN100486675C (en) | Method for harnessing exhaust gas containing NOx by using amidating humic acid | |
| CN102464422A (en) | Method for pretreating industrial waste water | |
| CN105776489B (en) | A kind of method of recycling vanadium extracting waste water production catalytic combustion adjuvant for coal | |
| CN112759105A (en) | Method for selectively removing thiocyanate in nitrile-containing wastewater | |
| CN112299589A (en) | Method for sewage treatment process | |
| CN105523571A (en) | Method for processing mineralized organic amine and resource utilization used after carbon dioxide capture |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |