CN1076325C - Method for integral treatment of domestic and chemical industrial sewage - Google Patents
Method for integral treatment of domestic and chemical industrial sewage Download PDFInfo
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- CN1076325C CN1076325C CN 98121487 CN98121487A CN1076325C CN 1076325 C CN1076325 C CN 1076325C CN 98121487 CN98121487 CN 98121487 CN 98121487 A CN98121487 A CN 98121487A CN 1076325 C CN1076325 C CN 1076325C
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- denitrification
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- ammonia nitrogen
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Abstract
The present invention relates to effective technology (AOAO-membrane adding technology) for treating domestic waste water and comprehensive waste water from chemical industry. In the technology, endogenous denitrification is strengthened, and preceding treatment creates a stable and favorable bacterium growing environment for subsequent nitrification in the treating process. Complicated treatment of domestic waste water and waste water from chemical industry is achieved finally. When the COD<CR> of intake water is from 500 to 900 mg/L and ammonia nitrogen of the intake water is smaller than 150 mg/L, 90% of the COD<CR> of effluent water is smaller than 130 mg/L, 40 to 50% of data is smaller than 100 mg/L, and the content of ammonia nitrogen is smaller than 15 mg/L.
Description
The present invention relates to live and the biochemical processing method of chemical industry composite wastewater, especially adopt the method for life of two-stage denitrification one oxidation coating method art breading and chemical industry composite wastewater.
At present, the sewage biochemical processing process mainly contains single-stage AO technology, secondary AOO technology and secondary OAO technology, and wherein A represents anaerobism or anoxic condition, and O represents the aeration state.As Fig. 1, Fig. 2, shown in Figure 3.These several technologies all have removal NH
3N and COD
CREffect, but different for its treatment effect of sewage of different quality.Especially at the sewage that contains complicated organic component and higher concentration ammonia nitrogen, its treatment effect is not satisfactory.The common issue with that they exist: 1. all need nitrated mixed-liquor return, be generally 2～5 times of flooding quantity, purpose is to strengthen the denitrification of A section in the reactor, has so just strengthened power consumption; 2. as water inlet COD
CR/ N increased reflux ratio and can not improve denitrification speed less than 4 o'clock, and is opposite because quantity of reflux is big, and the dissolved oxygen of bringing the denitrification section into is many, and denitrification is had restraining effect, reduces denitrification rate; 3. in the simple denitrification process based on rear-mounted denitrification (as OAO technology), because its denitrification rate is low, thereby needs long hydraulic detention time, it is big to cause equipment volume, and investment is high.4. the cultivation difficulty of nitrifier, the nitrification instability is to such an extent as to the nitration reaction of system is undesirable.
The object of the present invention is to provide a kind of new processing life and the method for chemical industry composite wastewater, overcome shortcomings such as the traditional technology reflux ratio is big, nitrifier cultivation difficulty, wastewater treatment efficiency difference.
Sewage water treatment method of the present invention mainly divides following a few step: the 1. first denitrification section (A1 section): main effect is anoxic absorption, intensified anti-nitrated effect; 2. first oxidation panel (O1 section): remove organism and a spot of ammonia nitrogen; 3. the second denitrification section (A2 section): utilize the organic carbon source of anoxic absorption, intensified anti-nitrated effect; 4. second oxidation panel (O2 section): remove organism and a spot of ammonia nitrogen; 5. film section: create to nitrobacteria and stablize good growing environment, strengthen nitrification, mainly remove ammonia nitrogen.
Fig. 1 is a single-stage AO process flow sheet.
Fig. 2 is a single-stage AOO process flow sheet.
Fig. 3 is a single-stage OAO process flow sheet.
Fig. 4 is life of the present invention and chemical industry composite wastewater processing technological flow figure.
Elaborate below in conjunction with 4 pairs of lives of the present invention of accompanying drawing and chemical industry composite wastewater treatment process.
Life and chemical industry composite wastewater (1) enter one section reaction tank (4) by tank (2).This reaction tank (4) is divided into the first denitrification section (A1), first oxidation panel (O1), the second denitrification section (A2) and second oxidation panel (O2).Composite wastewater (1) at first enters the first denitrification section (A1), in this section in the microorganism planar water large amount of organic as storing carbon source, simultaneously this section with water in organism be that carbon source is carried out anti-nitration reaction to remove the nitric nitrogen in the water, enter first oxidation panel (O1) oxidation of organic compounds afterwards and a spot of ammonia nitrogen be oxidized to nitric nitrogen; Enter the second denitrification section (A2) then, utilize the organic carbon source of first denitrification section anoxic absorption, intensified anti-nitrated effect, to reach high nitric efficiency, sewage enters second oxidation panel (O2) afterwards, removes organism and a spot of ammonia nitrogen; Sewage and mud come out to enter a heavy pond (5) from one section reaction tank (4) and carry out the sewage separation, mud refluxes (3) to the first denitrification section (A1), reflux ratio is 0.7-1.0, sewage enters film section reaction tank (6) afterwards, the film section is created one to nitrobacteria and is stablized good growing environment, strengthen nitrification, mainly remove ammonia nitrogen.With regard to whole process, remove most of organism and created a stable sound response condition also for film section nitration reaction for one section.Sewage enters second pond (8) after coming out from film section reaction tank (6), and second pond (8) just when film section biofilm is cultivated, in order to the mud (7) that refluxes and take out of from the film section, stops after biofilm is finished refluxing.The sewage of handling through the film section is water outlet (9).This technology total hrt is about 40-50 hours.
The present invention is owing to adopt two-stage denitrification-oxidation coating method technology, strengthened the endogenous denitrification effect, need not nitrification liquid and reflux, and the processing of one section reaction tank has been created for film section nitrification to stablize good bacterial growth environment, make nitrogen removal rate reach 70～80%, as water inlet COD
CRBe 500～900mg/L (B/C=0.2～0.3), influent ammonia nitrogen is during less than 150mg/L, water outlet COD
CR90% data are less than 130mg/L, and 40～50% data are less than 100mg/L, and ammonia-nitrogen content is less than 15mg/L.
Embodiment:
The life of COD550mg/L ammonia nitrogen 100mg/L and chemical industry composite wastewater enter film section reaction tank after one section reaction tank is handled 25 hours, record COD110mg/L in the water, ammonia nitrogen 60mg/L this moment, and organic removal reaches 80%; Water outlet after the film reaction pond is handled 25 hours, COD is less than 100mg/L, and the water outlet ammonia-nitrogen content is less than 15mg/L.
Claims (3)
1. live and chemical industry composite wastewater treatment process for one kind, by the two-stage denitrification---oxidation panel and film reaction section are formed, it is characterized in that sewage at first enters the first denitrification section by tank, adsorb organic compound is also removed nitric nitrogen in the water, enter the first oxidation panel oxidation of organic compounds afterwards and a spot of ammonia nitrogen is oxidized to nitric nitrogen, enter the second denitrification section then, utilize the intensified anti-nitrated effect of organic carbon source of first denitrification section absorption, enter second oxidation panel afterwards and remove organism and a small amount of ammonia nitrogen, through the two-stage denitrification---the sewage of oxide treatment enters a heavy pond and carries out mud-water separation, mud is back to the first denitrification section, sewage enters the film reaction section and removes ammonia nitrogen then, at last by the second pond water outlet.
2. sewage water treatment method according to claim 1 is characterized in that described second pond is when film reaction section biofilm is cultivated, and in order to the mud that refluxes and take out of from the film reaction section, stops after biofilm is finished refluxing.
3. sewage water treatment method according to claim 1 is characterized in that total hrt is 40～50 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98121487 CN1076325C (en) | 1998-09-30 | 1998-09-30 | Method for integral treatment of domestic and chemical industrial sewage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98121487 CN1076325C (en) | 1998-09-30 | 1998-09-30 | Method for integral treatment of domestic and chemical industrial sewage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1220243A CN1220243A (en) | 1999-06-23 |
| CN1076325C true CN1076325C (en) | 2001-12-19 |
Family
ID=5227115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98121487 Expired - Fee Related CN1076325C (en) | 1998-09-30 | 1998-09-30 | Method for integral treatment of domestic and chemical industrial sewage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1076325C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105565582B (en) * | 2014-10-09 | 2018-07-03 | 中国石油化工股份有限公司 | Coal hydrogen manufacturing sewage water treatment method |
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1998
- 1998-09-30 CN CN 98121487 patent/CN1076325C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1220243A (en) | 1999-06-23 |
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