CN104528928A - Process for domesticating gradient dynamic active sludge under aerobic condition - Google Patents
Process for domesticating gradient dynamic active sludge under aerobic condition Download PDFInfo
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- CN104528928A CN104528928A CN201410815006.4A CN201410815006A CN104528928A CN 104528928 A CN104528928 A CN 104528928A CN 201410815006 A CN201410815006 A CN 201410815006A CN 104528928 A CN104528928 A CN 104528928A
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- aerobic condition
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- 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
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Activated Sludge Processes (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention relates to a process for domesticating gradient dynamic active sludge under an aerobic condition. The process comprises the following steps: (1) preparing simulated wastewater as a culture medium for later use according to a mass ratio of 100:75:5:1 of BOD5:C:N:P; (2) adding the active sludge and the culture medium obtained in the step (1) into an SBR (styrene butadiene rubber) reaction tank with an effective volume of 15L, stirring for aeration, and changing water once every 12 hours under the aerobic condition, namely each sludge age is 12 hours; changing 3L of water each time and controlling the DO value to be 1.5mg/L from the first day to the sixth day; changing 4.5L of water each time and controlling the DO value to be 2.0mg/L from the seventh day to the twelfth day; and changing 6L of water each time and controlling the DO value to be 2.5mg/L from the thirteenth day to the eighteenth day. According to the process provided by the invention, the culture medium is added in a gradient manner during domestication, the add amount is different in different periods, and the gradient is increased, so that the microbial quantity can be increased as much as possible; and by adopting the process provided by the invention, after 18 days of culture domestication, the color of the sludge is changed from black into reddish brown, the sludge has obvious fishy smell, and the sedimentation performance of the sludge is obviously improved.
Description
Technical field
The present invention relates to field of environment microorganism, day by day serious sewage handling problem can be widely used in.
Background technology
Activated sludge process is method conventional for the treatment of sewage at present, and it is not high to there are some domestication efficiency in the past in method, domestication DeGrain, utilization ratio is low, even do not carry out the drawbacks such as second stage employ, in fact have a lot of microorganism species in mud, storing a large amount of energy matters in some flora body can carry out extraction and application, and traditional method does not often reach the storage capacity of expection.
Summary of the invention
The present invention is directed to the domestication technique that above-mentioned Problems existing provides a kind of aerobic condition Gradient dynamic activity mud, to guarantee the superiority of gained active sludge property indices, waste water control can be applied to more efficiently.
The technical solution adopted in the present invention is: the domestication technique of aerobic condition Gradient dynamic activity mud, comprising:
1) according to mass ratio BOD
5: the proportions simulated wastewater of C:N:P=100:75:5:1 is as nutrient solution, for subsequent use;
2) by active sludge and step 1) gained nutrient solution adds in the sbr reactor pond of useful volume 15L, and stir aeration, under aerobic condition, within every 12 hours, change water once, be i.e. 12 hours ages of each mud;
1-6 days, changes water 3L at every turn, and control DO value is 1.5mg/L;
7-12 days, changes water 4.5L at every turn, and control DO value is 2.0mg/L;
13-18 days, changes water 6L at every turn, and control DO value is 2.5mg/L.
As preferably, each mud comprise age 10.5 hours stirring aeration, 1 hour leave standstill and 0.5 hour change water.
As preferably, leaving standstill and changing the water stage, control DO value is not less than 0.2mg/L.
As preferably, described in change water process be first discharge section waste water, then add the described nutrient solution of same volume with it.
As preferably, the carbon in simulated wastewater is provided by sodium-acetate, and nitrogen is provided by ammonium chloride, and phosphorus is provided by dipotassium hydrogen phosphate.
As preferably, described active sludge comes from municipal sludge treatment plant.
As preferably, described step 2) in, along with the increase of quantity of exchanged water increases aeration rate and stirring velocity.
As preferably, keep the pH value of sludge liquid in domestication process between 6.5-8.0, temperature is between 24-26 DEG C.
As preferably, described pH value is regulated by HCL or NaOH of 1mol/L.
The invention has the beneficial effects as follows: adopt gradient to add domestication liquid (nutrient solution) in domestication process of the present invention, the addition during difference is different, and gradient increases, and can make the increase of microbe population maximum quantity; Employing the inventive method is tamed through the cultivation of 18 days, mud color becomes sorrel by black, there is obvious fishy smell, settling property achieves obvious raising, the net result SV of 30 minutes is 25-30%, the value of SVI is 75-90, and MLVSS is stabilized between 3500-4500mg/L, the COD of the waste water discharged
cRdegradation rate is greater than 85%.
Embodiment
The domestication technique of aerobic condition Gradient dynamic activity mud comprises:
1) according to mass ratio BOD
5: the proportions simulated wastewater of C:N:P=100:75:5:1 is for subsequent use as nutrient solution; Carbon in simulated wastewater is provided by sodium-acetate, and nitrogen is provided by ammonium chloride, and phosphorus is provided by dipotassium hydrogen phosphate;
2) active sludge and the step 1 of municipal sludge treatment plant will be come from) gained nutrient solution joins in the sbr reactor pond (useful volume 15L) of 20L, stir aeration, under aerobic condition, within every 12 hours, change water once, i.e. 12 hours ages of each mud, comprise the stirring aeration of 10.5 hours, 1 hour leave standstill and 0.5 hour change water;
1-6 days, change water 3L (first discharge 3L waste water, then add 3L step 1 gained nutrient solution), and control DO value is 1.5mg/L at every turn; Leaving standstill and changing the water stage, control DO value is not less than 0.2mg/L;
7-12 days, changes water 4.5L (first discharge 4.5L waste water, then add 4.5L step 1 gained nutrient solution) at every turn, and control DO value (dissolved oxygen, lower same) is 2.0mg/L; Leaving standstill and changing the water stage, control DO value is not less than 0.2mg/L;
13-18 days, change water 6L (first discharge 6L waste water, then add 6L step 1 gained nutrient solution), and control DO value is 2.5mg/L at every turn; Leaving standstill and changing the water stage, control DO value is not less than 0.2mg/L; And along with the increase of quantity of exchanged water suitably increases aeration rate and stirring velocity.
In the middle of whole domestication process, by the pH value of HCL or the NaOH conditioning of mud liquid of 1mol/L, make it to maintain between 6.5-8.0; Temperature is stabilized between 24-26 DEG C by indoor cabinet type air-conditioning or heating rod, to ensure the steady growth of microorganism.
Through the cultivation domestication of 18 days, mud color becomes sorrel by black, there is obvious fishy smell, settling property achieves obvious raising, the net result SV of 30 minutes (settling velocity, sludge settling ratio, also known as 30 minutes rate of descent) be 25-30%, SVI (sludge volume index, sludge volume index) value be 75-90, and MLVSS (mixed liquorvolatile suspended solids, mixed liquor volatile suspended solid, MLVSS concentration, represent the concentration of Organic solid matter part in mixed solution active sludge) be stabilized between 3500-4500mg/L, the COD of the waste water discharged
cRdegradation rate is greater than 85%.
The present invention also can screen there is advantage flora for microorganism field.
Claims (9)
1. a domestication technique for aerobic condition Gradient dynamic activity mud, is characterized in that comprising:
1) according to mass ratio BOD
5: the proportions simulated wastewater of C:N:P=100:75:5:1 is as nutrient solution, for subsequent use;
2) by active sludge and step 1) gained nutrient solution adds in the sbr reactor pond of useful volume 15L, and stir aeration, under aerobic condition, within every 12 hours, change water once, be i.e. 12 hours ages of each mud;
1-6 days, changes water 3L at every turn, and control DO value is 1.5mg/L;
7-12 days, changes water 4.5L at every turn, and control DO value is 2.0mg/L;
13-18 days, changes water 6L at every turn, and control DO value is 2.5mg/L.
2. the domestication technique of aerobic condition Gradient dynamic activity mud according to claim 1, is characterized in that: each mud comprise age 10.5 hours stirring aeration, 1 hour leave standstill and 0.5 hour change water.
3. the domestication technique of aerobic condition Gradient dynamic activity mud according to claim 2, is characterized in that: leaving standstill and changing the water stage, control DO value is not less than 0.2mg/L.
4. the domestication technique of the aerobic condition Gradient dynamic activity mud according to claim 1 or 2 or 3, is characterized in that: described in change water process be first discharge section waste water, then add the described nutrient solution of same volume with it.
5. the domestication technique of the aerobic condition Gradient dynamic activity mud according to claim 1 or 2 or 3, is characterized in that: the carbon in simulated wastewater is provided by sodium-acetate, and nitrogen is provided by ammonium chloride, and phosphorus is provided by dipotassium hydrogen phosphate.
6. the domestication technique of the aerobic condition Gradient dynamic activity mud according to claim 1 or 2 or 3, is characterized in that: described active sludge comes from municipal sludge treatment plant.
7. the domestication technique of the aerobic condition Gradient dynamic activity mud according to claim 1 or 2 or 3, is characterized in that: described step 2) in, along with the increase of quantity of exchanged water increases aeration rate and stirring velocity.
8. the domestication technique of the aerobic condition Gradient dynamic activity mud according to claim 1 or 2 or 3, is characterized in that: keep the pH value of sludge liquid in domestication process between 6.5-8.0, temperature is between 24-26 DEG C.
9. the domestication technique of aerobic condition Gradient dynamic activity mud according to claim 8, is characterized in that: described pH value is regulated by HCL or NaOH of 1mol/L.
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| CN201410815006.4A CN104528928B (en) | 2014-12-24 | 2014-12-24 | A kind of domestication technique of aerobic condition Gradient dynamic activity mud |
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| CN201410815006.4A CN104528928B (en) | 2014-12-24 | 2014-12-24 | A kind of domestication technique of aerobic condition Gradient dynamic activity mud |
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| CN104528928A true CN104528928A (en) | 2015-04-22 |
| CN104528928B CN104528928B (en) | 2016-04-20 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110713251A (en) * | 2019-11-19 | 2020-01-21 | 博天环境集团股份有限公司 | Sludge domestication device |
| CN111855947A (en) * | 2020-08-10 | 2020-10-30 | 北京石油化工学院 | Toxicity detection method based on BOD difference value before and after degradation of activated sludge |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102070251A (en) * | 2010-11-29 | 2011-05-25 | 哈尔滨工业大学 | Preparation method of immobilized cold resistant nitrobacteria |
| CN102433260A (en) * | 2011-10-21 | 2012-05-02 | 浙江大学舟山海洋研究中心 | Method for screening and domesticating marine oil pollutant microorganisms and use of marine oil fouling microorganisms |
-
2014
- 2014-12-24 CN CN201410815006.4A patent/CN104528928B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102070251A (en) * | 2010-11-29 | 2011-05-25 | 哈尔滨工业大学 | Preparation method of immobilized cold resistant nitrobacteria |
| CN102433260A (en) * | 2011-10-21 | 2012-05-02 | 浙江大学舟山海洋研究中心 | Method for screening and domesticating marine oil pollutant microorganisms and use of marine oil fouling microorganisms |
Non-Patent Citations (3)
| Title |
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| 杨晓瑞: ""SBR系统中活性污泥的驯化"", 《天津科技》 * |
| 王小文: "《水污染控制工程 》", 31 August 2002, 煤炭工业出版社 * |
| 胡侃: "《水污染控制》", 31 August 1998, 武汉工业大学出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110713251A (en) * | 2019-11-19 | 2020-01-21 | 博天环境集团股份有限公司 | Sludge domestication device |
| CN111855947A (en) * | 2020-08-10 | 2020-10-30 | 北京石油化工学院 | Toxicity detection method based on BOD difference value before and after degradation of activated sludge |
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| Publication number | Publication date |
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| CN104528928B (en) | 2016-04-20 |
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