CN102134148A - O/A/O process for treating high-concentration ammonia nitrogen wastewater - Google Patents
O/A/O process for treating high-concentration ammonia nitrogen wastewater Download PDFInfo
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- CN102134148A CN102134148A CN 201110106657 CN201110106657A CN102134148A CN 102134148 A CN102134148 A CN 102134148A CN 201110106657 CN201110106657 CN 201110106657 CN 201110106657 A CN201110106657 A CN 201110106657A CN 102134148 A CN102134148 A CN 102134148A
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Abstract
The invention belongs to the technical field of sewage treatment, and particularly relates to an O/A/O process for treating high-concentration ammonia nitrogen wastewater. A first aeration tank, an anaerobic tank and a second aeration tank sequentially connected in series are adopted in the process, wherein the first aeration tank is also called as a section O1 reaction tank, the anaerobic tank is also called as a section A reaction tank, and the second aeration tank is also called as a section O2 reaction tank. The process creates a system per se; and compared with a two-stage A/O process, the flow is simplified, equipment and operating links are reduced, and meanwhile, the removal effect of the two-stage A/O process is reserved. The process is suitable for high-concentration difficultly treated wastewater of different industries and different components, and particularly has unique removal effect on ammonia nitrogen wastewater treatment of the chemical fertilizer industry. According to the requirements of the treatment process, the process can be used separately, and can also be matched with multiple treatment units for treating difficultly degraded wastewater with complex components.
Description
Technical field
The invention belongs to technical field of sewage, be specifically related to a kind of O/A/O technology of handling high-concentration ammonia nitrogenous wastewater.
Background technology
China is a country that per capita resources is very poor, and Freshwater resources are world's per-capita quantity of the resources 1/4 only per capita, occupies the 88th in the world.Simultaneously China is again a country that wasting of resources phenomenon is serious, and water consumption is 5～6 times of advanced country per capita.Secular low water usage rate has not only been wasted great amount of water resources, has also caused the pollution of limited water resources, makes good water sources shortage and falling sharply day by day, has had a strong impact on the people's quality of life and healthy.
Show that according to data the sewage quantity that China flows into the lake every day is (600～1000) * 10
4m
3, 6% of national approximately waste water total amount, its principal pollutant are ammonia nitrogen, total phosphorus and organism.Existing 1/3 water is not suitable for aquatic organism existence such as fish, has 1/4 water body to be not suitable for crop irrigation, has drinking water source, 1/2 cities and towns not meet standard.This shows that the aggravation that the serious scarcity of water resources and water pollute as a double-edged sword, constitutes grave danger for China's economy, culture, life and development.
Pollute at water under the severe situation of aggravation, distinct issues are protections of water body or water resources, and the processing of nitrogenous effluent and the innovation of treatment process are the important measures of water resources protection with development.Existing ammonia nitrogenous wastewater treatment technology all has bigger selectivity and limitation, particularly for the trade effluent of handling high density, difficult degradation, general plant investment is bigger, working cost is higher, and manufacturer is difficult to bear, and presses for new technology and replaces old technology, new technological change traditional technology, thereby reduce investment, reduce cost, guarantee the qualified discharge of ammonia nitrogen waste water.
Summary of the invention
The purpose of this invention is to provide a kind of O/A/O technology of handling high-concentration ammonia nitrogenous wastewater, this technology has characteristics such as flow process is simple, shock-resistance strong, stably reaching standard discharging.
For achieving the above object, the present invention has adopted following technical scheme: a kind of O/A/O technology of handling high-concentration ammonia nitrogenous wastewater, and it comprises placed in-line successively first aeration tank, anoxic pond and second aeration tank, concrete steps are as follows:
1), nitrogen-containing wastewater after pre-treatment, or directly send into first aeration tank to remove COD by transferpump without pre-treatment
Cr, concurrent ammonifyingization and nitration reaction change into nitrate nitrogen with ammonia nitrogen;
2), the waste water gravity flow of handling through first aeration tank enters anoxic pond, backflow mixed liquor and additional carbon from second aeration tank are arranged in the anoxic pond, carry out anti-nitration reaction under the effect of the denitrifying bacteria of nitrate radical nitrogen in anoxic pond in the waste water, generate nitrogen and discharge anoxic pond and consume carbonaceous organic material;
3), the waste water gravity flow handled through anoxic pond enters second aeration tank, further removes COD
Cr, and continue to take place ammonification and nitration reaction; The water outlet of second aeration tank is provided with the mixed solution that is back to anoxic pond, with remaining nitrate nitrogen denitrification once more; All the other waste water of handling through second aeration tank enter subsequent treatment process with qualified discharge.
The present invention can also be able to further realization in the following manner:
Described nitrogen-containing wastewater is sent into first aeration tank and is handled after the stripping tower pre-treatment, to prevent the NH of ultrahigh concentration
3-N is to the impact of this technology, thereby guarantees that first aeration tank is not subjected to high density NH
3The influence of-N has reduced the carbon source magnitude of recruitment of this technology simultaneously.
Described first aeration tank, anoxic pond and second aeration tank are communicated with and adjacent one another are abutting in together successively along water (flow) direction, to save floor space, reduce cost.
Described mixed solution is back to second aeration tank by reflux line from anoxic pond, pond being integral of the body structure of described reflux line and anoxic pond, and not only flow is big, and resistance is little, does not take the useful space, and the amplitude of accommodation is big, and appearance effect is good.
The described waste water gravity flow of handling through second aeration tank enters settling tank, and the settling tank bottom is provided with sludge return pipe and the unnecessary mud discharging pipe that leads to first aeration tank water inlet place.
Jet-flow aeration method dissolved oxygen is adopted in described first aeration tank and second aeration tank, and dissolved oxygen is effective, do not stop up, and noiseless, equipment failure rate is low.
The present invention compares with prior art has following beneficial effect:
1), this technology can handle the nitrogenous or ammonia nitrogen waste water of higher concentration, the anti-ammonia nitrogen of traditional biochemical process impacts concentration and only limits to 150mg/L, and this technology can reach 300mg/L.
2), flow process is simple, the equipment layout compactness, Chi Rongxiao can realize easily that equipment is integrated, than other technology saving investments 15%～25%.
3), can utilize that carbonaceous organic material obtains comparatively ideal C/N ratio as carbon source in the raw wastewater, not only reduce the magnitude of recruitment of carbon source, can remove organic pollutant simultaneously again, working cost is than other technologies low about 15%.
4), this technology is adapted to the difficult waste water of high density of different industries, heterogeneity, especially handles at the ammonia nitrogen waste water of fertilizer industry, has unique removal effect.According to the requirement of treatment process, this technology can be used separately, also can be supporting with multiple processing unit, handle used water difficult to degradate with complicated composition.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the structural representation of embodiment among the present invention.
Embodiment
As shown in Figure 1, the O/A/O technology of this processing high-concentration ammonia nitrogenous wastewater comprises placed in-line successively first aeration tank, anoxic pond and second aeration tank, and described first aeration tank also is O
1The section reaction tank, anoxic pond also is an A section reaction tank, second aeration tank also is O
2The section reaction tank.
High density contain ammonia nitrogen (≤300mg/L) waste water is from pretreatment procedure (or transferpump) input O
1The section reaction tank, O
1The section reaction tank is provided with the oxygen supply aerating apparatus, and waste water is in aeration process, and nitrogenous compound and partial organic substances under the effect of various bacteria ammonification and nitration reaction take place, and most of pollutent is removed effectively simultaneously.
Waste water is from O then
1The section reaction tank flows automatically to A section reaction tank, and in A section reaction tank, the nitrate radical nitrogen in the waste water is converted into nitrogen substantially fully and is discharged from A section reaction tank under the effect of denitrifying bacteria, has also removed a large amount of carbonaceous organic materials simultaneously.
Waste water flows automatically to O from A section reaction tank more subsequently
2The section reaction tank passes through O
2The aerobic aeration of section reaction tank will remain nitrated and other the further removals of pollutents do of nitrogenous compound, thereby realize qualified discharge.
For keeping O
1The normal operation of section reaction tank and A section reaction tank, and guarantee that wastewater treatment is up to standard, O
2The outlet of section reaction tank is provided with mixed-liquor return and adjusting measure, regulates and the adding of external carbon source in case of necessity by the mixed-liquor return amount, thereby is O
2The reaction of section reaction tank and A section reaction tank creates conditions.Described external carbon source is also promptly mended C, and external carbon source is generally methyl alcohol.
The settling tank bottom is provided with mud return line road and unnecessary mud discharging pipe, guarantees the sludge concentration that each section reaction is required, and unnecessary mud is sent to the sludge treatment operation and handles.
Below in conjunction with specific embodiment the present invention is further elaborated:
As shown in Figure 2, chemical industry company limited in Anhui is a chemical enterprise of producing synthetic ammonia and nitrogenous fertilizer, and the waste water total amount is 1000m
3/ d, the principal pollutant concentration in the waste water is:
COD：500mg/L NH
3-N：300mg/L ss：200mg/L
s
2-：2.0mg/L CN
-：2.0mg/L PH：6～9
Design water outlet water-quality guideline is as follows:
COD
cr≤300mg/L NH
3-N≤15mg/L ss≤50mg/L
CN
-≤0.5mg/L s
2-≤1.0mg/L PH：6～9
According to above-mentioned water quality characteristics and water outlet requirement, the design wastewater treatment process as shown in Figure 2.
Treatment scheme among Fig. 2 is the high-concentration ammonia nitrogenous wastewater treatment process of serving as theme with the technology among the present invention.For preventing the NH of ultrahigh concentration
3-N is to the impact of system, at O
1Be provided with stripping tower before the section reaction tank, thereby guarantee O
1Reaction in the section reaction tank is not subjected to the influence of high density NH3-N, has reduced the carbon source magnitude of recruitment in the Waste Water Treatment simultaneously.
(≤300mg/L) ammonia nitrogen waste water can not established stripping tower for general concentration.
Through the operation test, main polluted factors reaches following removal effect, and is as shown in table 1:
Table 1 (unit: mg/L (except the PH))
| Processing unit | COD cr | NH 3-N | SS | CN - | s 2- | PH |
| Stripping tower advances | 507 | 520 | 198 | 2.0 | 2.0 | 9-10 |
| O 1The pond is advanced | 450 | 300 | 204 | 1.50 | 1.23 | 7-8 |
| O 2The pond is advanced | 6-9 | |||||
| Settling tank goes out | 80 | 15 | 45 | 0.45 | 0.67 | 6-9 |
| Clearance (%) | 84 | 97 | 77.3 | 77.5 | 66.5 |
In sum, this technology has following innovative point:
(1), this technology is with traditional two-stage A/O technology and improved technology thereof very big difference to be arranged, traditional A/O technology impact resistance is poor, can not adapt to the waste water of higher concentration; Two-stage A/O improved technology then long flow path, equipment is many and operation operation difficulty is big.This technology comes down to a two-stage A/O technology and unites two into one, and establishes one's own system, and has simplified flow process, has reduced equipment and operation link, has kept the removal effect of two-stage A/O technology simultaneously.
(2) O
1Section reaction tank, A section reaction tank and O
2The section reaction tank, according to the size of handling the water yield, Chi Tike selects metal, nonmetal and steel reinforced concrete material manufacturing respectively for use; Floor plan can be line style or rectangular arrangement according to the place by flow process, easy construction and saving the area.
(3), O
1Section reaction tank and O
2The section reaction tank adopts jet-flow aeration dissolved oxygen technology, and the reaction tank sludge concentration can keep more than the 5000mg/L.Dissolved oxygen is effective, do not stop up, and noiseless, equipment failure rate is low.
(4), mixed-liquor return adopts pond body pipeline integral structure, flow is big, resistance is little, does not take the useful space, the amplitude of accommodation is big, appearance effect is good.
Main technique technical indicator of the present invention is as follows:
O
1Pond water inlet: NH
3-N concentration≤300mg/L BOD
5≤ 300mg/L;
O
2Pond water outlet: COD≤80mg/L NH
3-N≤15mg/L
Clearance: NH
3-N:90%-97%BOD
5〉=90%
Claims (6)
1. an O/A/O technology of handling high-concentration ammonia nitrogenous wastewater is characterized in that comprising placed in-line successively first aeration tank, anoxic pond and second aeration tank, and concrete steps are as follows:
1), nitrogen-containing wastewater after pre-treatment or without pre-treatment, directly send into first aeration tank to remove COD by transferpump
Cr, concurrent ammonifyingization and nitration reaction;
2), the waste water gravity flow of handling through first aeration tank enters anoxic pond, backflow mixed liquor and additional carbon from second aeration tank are arranged in the anoxic pond, carry out anti-nitration reaction under the effect of the denitrifying bacteria of nitrate radical nitrogen in anoxic pond in the waste water, generate nitrogen and discharge anoxic pond and consume carbonaceous organic material;
3), the waste water gravity flow handled through anoxic pond enters second aeration tank, further removes COD.And ammonification and nitration reaction take place in continuation; The water outlet of second aeration tank is provided with the mixed solution that is back to anoxic pond, with remaining nitrate nitrogen denitrification once more; All the other waste water of handling through second aeration tank enter subsequent treatment process with qualified discharge.
2. the O/A/O technology of processing high-concentration ammonia nitrogenous wastewater according to claim 1 is characterized in that: described nitrogen-containing wastewater is sent into first aeration tank and is handled after the stripping tower pre-treatment.
3. the O/A/O technology of processing high-concentration ammonia nitrogenous wastewater according to claim 1 is characterized in that: connect and adjacent one another are abutting in together successively along water (flow) direction in described first aeration tank, anoxic pond and second aeration tank.
4. the O/A/O technology of processing high-concentration ammonia nitrogenous wastewater according to claim 1 is characterized in that: described mixed solution is back to anoxic pond by reflux line from second aeration tank, described reflux line and pond being integral of body structure.
5. according to the O/A/O technology of claim 1 or 2 or 3 or 4 described processing high-concentration ammonia nitrogenous wastewaters, it is characterized in that: the described waste water gravity flow of handling through second aeration tank enters settling tank, and the settling tank bottom is provided with sludge return pipe and the unnecessary mud discharging pipe that leads to first aeration tank water inlet place.
6. according to the O/A/O technology of claim 1 or 2 or 3 or 4 described processing high-concentration ammonia nitrogenous wastewaters, it is characterized in that: described first aeration tank and second aeration tank adopt the jet-flow aeration method that solution oxygen is provided.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102633359A (en) * | 2012-04-23 | 2012-08-15 | 中蓝连海设计研究院 | Method for treating total nitrogen of nitrogen-containing chemical wastewater |
| CN108503122A (en) * | 2017-02-28 | 2018-09-07 | 中国石油化工股份有限公司 | A method of adding polyurethane filler processing high ammonia-nitrogen wastewater |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1792897A (en) * | 2005-11-10 | 2006-06-28 | 复旦大学 | Process for depth treating total nitrogen of urban sewage |
| CN101306903A (en) * | 2007-05-18 | 2008-11-19 | 中国石油化工股份有限公司 | Biochemical treatment process for high-concentration ammonia-nitrogen-containing waste water |
| CN101880112A (en) * | 2010-07-06 | 2010-11-10 | 武汉钢铁(集团)公司 | Coking wastewater treatment process |
-
2011
- 2011-04-27 CN CN 201110106657 patent/CN102134148A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1792897A (en) * | 2005-11-10 | 2006-06-28 | 复旦大学 | Process for depth treating total nitrogen of urban sewage |
| CN101306903A (en) * | 2007-05-18 | 2008-11-19 | 中国石油化工股份有限公司 | Biochemical treatment process for high-concentration ammonia-nitrogen-containing waste water |
| CN101880112A (en) * | 2010-07-06 | 2010-11-10 | 武汉钢铁(集团)公司 | Coking wastewater treatment process |
Non-Patent Citations (3)
| Title |
|---|
| 《中国给水排水》 20001231 周海峰等 O/A/O组合工艺处理印染废水设计 第36-38页 3、5、6 第16卷, 第6期 * |
| 《工业用水与废水》 20070228 冯学等 焦化废水的处理与工艺改进 第62-63页 1-6 第38卷, 第1期 * |
| 《工业用水与废水》 20070228 冯学等 焦化废水的处理与工艺改进 第62-63页 1-6 第38卷, 第1期 2 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102633359A (en) * | 2012-04-23 | 2012-08-15 | 中蓝连海设计研究院 | Method for treating total nitrogen of nitrogen-containing chemical wastewater |
| CN102633359B (en) * | 2012-04-23 | 2013-06-12 | 中蓝连海设计研究院 | Method for treating total nitrogen of nitrogen-containing chemical wastewater |
| CN108503122A (en) * | 2017-02-28 | 2018-09-07 | 中国石油化工股份有限公司 | A method of adding polyurethane filler processing high ammonia-nitrogen wastewater |
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Application publication date: 20110727 |