CN101774693A - Method for quickly starting pre-denitrification biological aerated filter process - Google Patents
Method for quickly starting pre-denitrification biological aerated filter process Download PDFInfo
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- CN101774693A CN101774693A CN201010136902A CN201010136902A CN101774693A CN 101774693 A CN101774693 A CN 101774693A CN 201010136902 A CN201010136902 A CN 201010136902A CN 201010136902 A CN201010136902 A CN 201010136902A CN 101774693 A CN101774693 A CN 101774693A
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- denitrification biological
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
The invention discloses a method for quickly starting a pre-denitrification biological aerated filter process, belongs to the field of sewage treatment, and solves the problem that the conventional pre-denitrification biological aerated filter process consumes long time to culture pre-denitrification flora so as to result in over-long starting time. The method for quickly starting the pre-denitrification biological aerated filter process adopts the following mode: firstly, forming biofilm; secondly, emphasizing on culturing naturalized nitrobacterium; and finally culturing naturalized denitrified bacteria. Therefore, the acclimation link is saved, the acclimation time is shortened, and the debugging cost is reduced. The method can rapidly culture the denitrified bacteria in an anoxic denitrification biological aerated filter in the pre-denitrification biological aerated filter process and finish the debugging for putting into use as soon as possible. Due to the adoption of the method, the effluent of the pre-denitrification biological aerated filter process can be debugged to reach the standard in 120 to 140 days.
Description
Technical field
The invention belongs to the sewage field; Be specifically related to a kind of method of quickly starting pre-denitrification biological aerated filter process.
Background technology
Prepositive denitrification bio-filter technology floor space is little, and treatment effect height and running cost are low, is a kind of rising sewage treatment process.But cultivate denitrification flora length consuming time (cultivating the denitrification flora generally needs more than half a year) and prolonged start time.
Summary of the invention
Purpose of the present invention causes long problem start time in order to solve existing Prepositive denitrification bio-filter technology cultivation denitrification flora length consuming time; And provide the method for quickly starting pre-denitrification biological aerated filter process.
The method of quickly starting pre-denitrification biological aerated filter process is finished by following step among the present invention: one, 35% ~ 45%(by volume by the pre-denitrification biological aerated filter system design water yield) in pre-denitrification biological aerated filter, feeds sewage, the mol ratio of C:N in the control anoxic denitrification biological filter is not less than 4, the tolerance supply of the aeration rate of BAF during according to the running at full capacity of pre-denitrification biological aerated filter, filtrate biofilm to BAF and the anoxic biological filter does not need in the above-mentioned operational process to reflux; When two, then aeration rate being reduced to running at full capacity 1/3rd of tolerance, open reflux simultaneously, water after BAF handled refluxes and presses the 100%(by volume) reflux ratio is to the anoxic biological filter, kept 10 days, every 2 days in the anoxic denitrification biological filter according to ten thousand of flooding quantity/add seed sludge, then reflux ratio is increased to 150%, kept 10 days, again reflux ratio is increased to 200%, kept 10 days; Wherein seed sludge is the spoil disposal of life sewage work; Three, again the aeration rate of BAF is reduced make the BAF water outlet dissolved oxygen at 2.5 ~ 3.5mg/L, kept 15 days; Four, then amount of inlet water is increased to 55% ~ 65% of the system design water yield, reflux ratio is reduced to 150%, and the dissolved oxygen of BAF water outlet still is controlled at 2.5 ~ 3.5mg/L, keeps 15 days; Five, amount of inlet water is increased to 75% ~ 85% of the system design water yield, it is 4.5 ~ 5.5mg/L that the aeration rate of increase BAF makes the dissolved oxygen of BAF water outlet, keeps 15 days again; Six, then amount of inlet water is increased to the designed water of system, the design reflux ratio of reflux ratio furnishing system, the dissolved oxygen of BAF water outlet is controlled at 4.5 ~ 5.5mg/L, moves to " urban wastewater treatment firm comprehensive discharge standard (GB18918-2002) " one-level A standard that water outlet reaches national regulation; Promptly finished the startup of pre-denitrification biological aerated filter.
The inventive method has reduced the domestication link, and has reduced the domestication time, and has reduced debugging cost.The inventive method is turned out denitrifying bacteria in the anoxic denitrification biological filter in pre-denitrification biological aerated filter process fast, finishes debugging as early as possible and comes into operation; Adopt the inventive method can debug the water outlet of pre-denitrification biological aerated filter process up to standard at 3.5 ~ 4.5 months.
Embodiment
Embodiment one: the method for quickly starting pre-denitrification biological aerated filter process is finished by following step in the present embodiment: one, 35% ~ 45%(by volume by the pre-denitrification biological aerated filter system design water yield) in pre-denitrification biological aerated filter, feeds sewage, the mol ratio of C:N in the control anoxic denitrification biological filter is not less than 4, the tolerance supply of the aeration rate of BAF during according to the running at full capacity of pre-denitrification biological aerated filter, to (being the filtrate biofilm in BAF and the anoxic biological filter, not needing reflux (this process need 30 ~ 35 days) in the above-mentioned operational process; When two, then aeration rate being reduced to running at full capacity 1/3rd of tolerance, open reflux simultaneously, water after BAF handled refluxes and presses the 100%(by volume) reflux ratio is to the anoxic biological filter, kept 10 days, every 2 days in the anoxic denitrification biological filter according to ten thousand of flooding quantity/add seed sludge, then reflux ratio is increased to 150%, kept 10 days, again reflux ratio is increased to 200%, kept 10 days; Wherein seed sludge is the spoil disposal of life sewage work; Three, the dissolved oxygen that again aeration rate of BAF is reduced to the BAF water outlet was kept 15 days at 2.5 ~ 3.5mg/L; Four, then amount of inlet water is increased to 55% ~ 65% of the system design water yield, reflux ratio is reduced to 150%, and the dissolved oxygen of BAF water outlet still is controlled at 2.5 ~ 3.5mg/L, keeps 15 days; Five, amount of inlet water is increased to 75% ~ 85% of the system design water yield, it is 4.5 ~ 5.5mg/L that the aeration rate of increase BAF makes the dissolved oxygen of BAF water outlet, keeps 15 days again; Six, then amount of inlet water is increased to the designed water of system, the design reflux ratio of reflux ratio furnishing system, the dissolved oxygen of BAF water outlet is controlled at 4.5 ~ 5.5mg/L, moves to " urban wastewater treatment firm comprehensive discharge standard (GB18918-2002) " one-level A standard (needing 15 ~ 30 day time) that water outlet reaches national regulation; Promptly finished the startup of pre-denitrification biological aerated filter.
The present embodiment method is earlier preliminary biofilm, and emphasis is cultivated the domestication nitrifier again, cultivates the policy of domestication denitrifying bacteria again.And auxiliary with the sludge seeding technology, oxygen eliminating agent is eliminated methods such as dissolved oxygen technology, has not only reduced the domestication link, and has reduced the domestication time, and reduced debugging cost.
The pre-denitrification biological aerated filter system design water yield is generally 3～400,000 tons/day.
Water flowing in the present embodiment method can be carried out (as spending teletostage or equipment test run stage) before formal debugging, shortened initial failure period; Step 1 adopts excessive aeration can accelerate the cultivation domestication of nitrifier.And, need not also to worry that excessive dissolved oxygen impacts to the denitrification section owing to do not reflux earlier.The hydraulic load that the method that progressively improves reflux ratio that adopts in the step 2 can effectively be avoided increasing suddenly is to the biomembranous impact of denitrification filter pool, and the sludge seeding technology of employing can significantly reduce the domestication time.The way that reduces aerobic filter tank aeration rate gradually that is adopted in the step 2 to four can provide the low dissolved axygen environment to denitrification filter pool at the denitrifying bacteria initial stage of cultivating.The method that adds oxygen eliminating agent that adopts in the step 3 can be at the denitrifying bacteria cultivation initial stage low dissolved axygen environment that offers the best.The method that progressively improves amount of inlet water that is adopted in the step 4 to six can effectively be avoided improving flooding quantity microbial film is impacted; The method that improves aerobic filter tank dissolved oxygen gradually that is adopted in the step 4 to six can be cultivated the content of middle and later periods by the nitrification efficiency raising nitrate in the aerobic filter tank of raising at denitrifying bacteria.As only reaching the control dissolved oxygen content, can adopt blower fan one drag two (a typhoon machine is to two filter tank aerations) in the step 3, two holders, three (two typhoon machines are to three filter tank aerations), the perhaps ways of blower fan intermittent aeration by the blower fan frequency reducing.If still can't reach this numerical value, adopt the measure that in recirculation water, adds oxygen eliminating agent to eliminate dissolved oxygen.Oxygen eliminating agent can adopt the chlorine bleach liquor, and dosage can be controlled according to the dissolved oxygen under the denitrification filter pool filter plate and stage casing, filter tank, generally below 10mg/L.
Embodiment two: what present embodiment and embodiment one were different is: in the step 1 by the 40%(by volume of the system design water yield) in pre-denitrification biological aerated filter, feed sewage.Other step is identical with embodiment one with parameter.
Embodiment three: what present embodiment was different with embodiment one or two is: the mol ratio of the C:N in the step 1 in the control anoxic denitrification biological filter is 5 ~ 10.Other step is identical with embodiment one or two with parameter.
Embodiment four: what present embodiment was different with embodiment one or two is: the mol ratio of the C:N in the step 1 in the control anoxic denitrification biological filter is 11 ~ 15.Other step is identical with embodiment one or two with parameter.
Embodiment five: what present embodiment was different with one of embodiment one to four is: the aeration rate reduction with BAF in the step 3 makes the dissolved oxygen of BAF water outlet at 3.0mg/L.Other step is identical with one of embodiment one to four with parameter.
Embodiment six: what present embodiment was different with one of embodiment one to five is: in the step 5 amount of inlet water is increased to 80% of the system design water yield.Other step is identical with one of embodiment one to five with parameter.
Embodiment seven: what present embodiment was different with one of embodiment one to six is: it is 5.0mg/L that the aeration rate that increases BAF in the step 5 makes the dissolved oxygen of BAF water outlet.Other step is identical with one of embodiment one to six with parameter.
Embodiment eight: what present embodiment was different with one of embodiment one to seven is: the dissolved oxygen of BAF water outlet is controlled at 5.0mg/L in the step 6.Other step is identical with one of embodiment one to seven with parameter.
Embodiment nine: the method for quickly starting pre-denitrification biological aerated filter process is finished by following step in the present embodiment: one, 40%(by volume by the pre-denitrification biological aerated filter system design water yield) in pre-denitrification biological aerated filter, feeds sewage, the mol ratio of C:N in the control anoxic denitrification biological filter is 4, the tolerance supply of the aeration rate of BAF during according to the running at full capacity of pre-denitrification biological aerated filter, the equal biofilm of filtrate to BAF and the anoxic biological filter does not need reflux (this process need 30 ~ 35 days) in the above-mentioned operational process; When two, then aeration rate being reduced to running at full capacity 1/3rd of tolerance, open reflux simultaneously, water after BAF handled refluxes and presses the 100%(by volume) reflux ratio is to the anoxic biological filter, kept 10 days, every 2 days in the anoxic denitrification biological filter according to ten thousand of flooding quantity/add seed sludge, then reflux ratio is increased to 150%, kept 10 days, again reflux ratio is increased to 200%, kept 10 days; Wherein seed sludge is the spoil disposal of life sewage work; Three, the dissolved oxygen that again aeration rate of BAF is reduced to the BAF water outlet was kept 15 days at 3.0mg/L; Four, then amount of inlet water is increased to 60% of the system design water yield, reflux ratio is reduced to 150%, and the dissolved oxygen of BAF water outlet still is controlled at 2.5 ~ 3.5mg/L, keeps 15 days; Five, amount of inlet water is increased to 80% of the system design water yield, it is 5.0mg/L that the aeration rate of increase BAF makes the dissolved oxygen of BAF water outlet, keeps 15 days again; Six, then amount of inlet water is increased to the designed water of system, the design reflux ratio of reflux ratio furnishing system, the dissolved oxygen of BAF water outlet is controlled at 5.0mg/L, moves to " urban wastewater treatment firm comprehensive discharge standard (GB18918-2002) " one-level A standard (needing 15 ~ 30 day time) that water outlet reaches national regulation; Promptly finished the startup of pre-denitrification biological aerated filter.
Claims (8)
1. the method for quickly starting pre-denitrification biological aerated filter process, the method that it is characterized in that quickly starting pre-denitrification biological aerated filter process is finished by following step: one, 35% ~ 45%(by volume by the pre-denitrification biological aerated filter system design water yield) in pre-denitrification biological aerated filter, feeds sewage, the mol ratio of C:N in the control anoxic denitrification biological filter is not less than 4, the tolerance supply of the aeration rate of BAF during according to the running at full capacity of pre-denitrification biological aerated filter, filtrate biofilm to BAF and the anoxic biological filter does not need in the above-mentioned operational process to reflux; When two, then aeration rate being reduced to running at full capacity 1/3rd of tolerance, open reflux simultaneously, water after BAF handled refluxes by the 100%(by volume) be back to the anoxic biological filter, kept 10 days, every 2 days in the anoxic denitrification biological filter according to ten thousand of flooding quantity/add seed sludge, then reflux ratio is increased to 150%, kept 10 days, again reflux ratio is increased to 200%, kept 10 days; Wherein seed sludge is the spoil disposal of life sewage work; Three, again the aeration rate of BAF is reduced make the BAF water outlet dissolved oxygen at 2.5 ~ 3.5mg/L, kept 15 days; Four, then amount of inlet water is increased to 55% ~ 65% of the system design water yield, reflux ratio is reduced to 150%, and the dissolved oxygen of BAF water outlet still is controlled at 2.5 ~ 3.5mg/L, keeps 15 days; Five, amount of inlet water is increased to 75% ~ 85% of the system design water yield, it is 4.5 ~ 5.5mg/L that the aeration rate of increase BAF makes the dissolved oxygen of BAF water outlet, keeps 15 days again; Six, then amount of inlet water is increased to the designed water of system, the design reflux ratio of reflux ratio furnishing system, the dissolved oxygen of BAF water outlet is controlled at 4.5 ~ 5.5mg/L, moves to " urban wastewater treatment firm comprehensive discharge standard (GB18918-2002) " one-level A standard that water outlet reaches national regulation; Promptly finished the startup of pre-denitrification biological aerated filter.
2. according to the method for the described quickly starting pre-denitrification biological aerated filter process of claim 1, it is characterized in that in the step 1 40%(by volume by the system design water yield) in pre-denitrification biological aerated filter, feed sewage.
3. according to the method for claim 1 or 2 described quickly starting pre-denitrification biological aerated filter process, it is characterized in that the mol ratio of the C:N in the control anoxic denitrification biological filter in the step 1 is 5 ~ 10:1.
4. according to the method for claim 1 or 2 described quickly starting pre-denitrification biological aerated filter process, it is characterized in that the mol ratio of the C:N in the control anoxic denitrification biological filter in the step 1 is 11 ~ 15:1.
5. according to the method for the described quickly starting pre-denitrification biological aerated filter process of claim 3, it is characterized in that in the step 3 that aeration rate with BAF reduces to make the dissolved oxygen of BAF water outlet at 3.0mg/L.
6. according to the method for claim 1,2 or 5 described quickly starting pre-denitrification biological aerated filter process, it is characterized in that in the step 5 amount of inlet water is increased to 80% of the system design water yield.
7. according to the method for the described quickly starting pre-denitrification biological aerated filter process of claim 6, it is 5.0mg/L that the aeration rate that it is characterized in that increasing in the step 5 BAF makes the dissolved oxygen of BAF water outlet.
8. according to the method for claim 1,2,5 or 7 described quickly starting pre-denitrification biological aerated filter process, it is characterized in that the dissolved oxygen of BAF water outlet in the step 6 is controlled at 5.0mg/L.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108439710A (en) * | 2018-04-09 | 2018-08-24 | 绍兴柯桥江滨水处理有限公司 | System for advanced treatment of dyeing wastewater |
| CN109574258A (en) * | 2019-01-21 | 2019-04-05 | 南京大学 | A method of realizing denitrification bio-filter quick start |
| CN110818091A (en) * | 2019-07-31 | 2020-02-21 | 广东卓信环境科技股份有限公司 | BAF water-stop microorganism maintenance method |
| CN111285473A (en) * | 2019-12-28 | 2020-06-16 | 北京翰祺环境技术有限公司 | Method for promoting quick start of denitrification and decarburization system by using high-salt-resistant strain |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1778715A (en) * | 2005-10-20 | 2006-05-31 | 彭永臻 | Front denitrification sewage treater, treatment, its automatic controller and control thereof |
| US7465376B2 (en) * | 2001-02-22 | 2008-12-16 | Susanne Neubert | Method and device for treating liquids |
| CN101475292A (en) * | 2009-01-21 | 2009-07-08 | 哈尔滨工业大学 | Prepositive denitrification bio-filter processing method for municipal sewage |
| CN101525207A (en) * | 2009-04-15 | 2009-09-09 | 郑俊 | Integrated pre-denitrification and denitrogenation biological filter sewerage treatment process |
-
2010
- 2010-03-31 CN CN201010136902XA patent/CN101774693B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7465376B2 (en) * | 2001-02-22 | 2008-12-16 | Susanne Neubert | Method and device for treating liquids |
| CN1778715A (en) * | 2005-10-20 | 2006-05-31 | 彭永臻 | Front denitrification sewage treater, treatment, its automatic controller and control thereof |
| CN101475292A (en) * | 2009-01-21 | 2009-07-08 | 哈尔滨工业大学 | Prepositive denitrification bio-filter processing method for municipal sewage |
| CN101525207A (en) * | 2009-04-15 | 2009-09-09 | 郑俊 | Integrated pre-denitrification and denitrogenation biological filter sewerage treatment process |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108439710A (en) * | 2018-04-09 | 2018-08-24 | 绍兴柯桥江滨水处理有限公司 | System for advanced treatment of dyeing wastewater |
| CN109574258A (en) * | 2019-01-21 | 2019-04-05 | 南京大学 | A method of realizing denitrification bio-filter quick start |
| CN109574258B (en) * | 2019-01-21 | 2021-05-28 | 南京大学 | Method for realizing rapid start of denitrification biological filter |
| CN110818091A (en) * | 2019-07-31 | 2020-02-21 | 广东卓信环境科技股份有限公司 | BAF water-stop microorganism maintenance method |
| CN110818091B (en) * | 2019-07-31 | 2022-04-15 | 广东卓信环境科技股份有限公司 | BAF water-stop microorganism maintenance method |
| CN111285473A (en) * | 2019-12-28 | 2020-06-16 | 北京翰祺环境技术有限公司 | Method for promoting quick start of denitrification and decarburization system by using high-salt-resistant strain |
| CN111285473B (en) * | 2019-12-28 | 2022-03-08 | 北京翰祺环境技术有限公司 | Method for promoting quick start of denitrification and decarburization system by using high-salt-resistant strain |
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