CN1215998C - Push flow composite biological mud volume reducing reactor and its operation method - Google Patents
Push flow composite biological mud volume reducing reactor and its operation method Download PDFInfo
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- CN1215998C CN1215998C CN021590486A CN02159048A CN1215998C CN 1215998 C CN1215998 C CN 1215998C CN 021590486 A CN021590486 A CN 021590486A CN 02159048 A CN02159048 A CN 02159048A CN 1215998 C CN1215998 C CN 1215998C
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- former
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- mud
- metazoan
- metazoan vitellarium
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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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- 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
- Y02W10/20—Sludge processing
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Abstract
The present invention particularly relates to a push-flow composite biological sludge reducing reactor and an operation method thereof, which belongs to equipment for processing sludge by biological techniques. The push-flow composite biological sludge reducing reactor is divided into three parts of a dissociated protozoan and metazoan growing region, an adhered protozoan and metazoan growing region, and a solid-liquid separation settling zone; the push-flow composite biological sludge reducing reactor respectively provides a suitable habitat for stable growth of different types of protozoa and metazoa, and thus, the sludge reduction effect is effectively improved. The present invention can not only be independently used for reduction processing of excess sludge discharged from biological sewage treatment systems, but also be used for processing return sludge of conventional activated sludge processes; the present invention can reduce the generated quantity of the sludge by combining with an aeration tank and two settling tanks.
Description
Technical field
The invention belongs to and utilize biotechnology to handle the apparatus field of mud, particularly a kind of plug-flow combined biological sludge decrement reactor and working method thereof.
Background technology
Activated sludge process is the most popular biologic treating technique of municipal effluent and industrial effluent treatment plant in the world at present, but produces a large amount of excess sludges in operational process.Usually, the processing of excess sludge and disposal account for 40% of entire sewage treatment plant working cost.If excess sludge can not effectively be handled and dispose,, also can cause secondary pollution with directly influencing the normal operation of sewage work.
The common principle of sludge treatment and disposal is stabilization, innoxious and resource utilization.The main methods of excess sludge is that mud concentrates-anaerobic digestion-mechanical dehydration at present; The ultimate disposal mode mainly contains: soil utilization (comprise that farmland, gardens utilize, and compost etc.), landfill and burning (or thermal treatment) etc.The environmental legislation that the land used of landfill day by day reduces with increasingly stringent causes the expense of mud landfill sharply to increase; Because heavy metal and persistence organic pollutant in the mud, the soil utilization of mud have been subjected to more and more stricter restriction, in order to avoid these pollutents utilize the health that influences people and animals in the process in the soil; The sludge incineration investment is high, and the residue (heavy metal content height) that burns the back generation still needs to dispose.
The nineties in 20th century, part developed country proposed sludge reduction, resource utilization, innoxious processing and disposal order, and began to carry out the mud decrement Study on Technology.Present mud decrement technology can be divided into four classes: (1) molten born of the same parents-recessive growth, by two the step form: molten born of the same parents and recessive growth.Usually the method that adopts physics, chemical process or them to combine makes cytolysis, causes the recessive growth of microorganism then, thereby causes the minimizing of sludge yield.Such as: adopt ozone or chlorine treatment returned sluge.Japan adopts the ozonize returned sluge, reduction sludge yield greatly, but also increased the investment and the energy consumption cost of sewage disposal; Though chlorine is more cheap than ozone, the generation haloform because the organism in chlorine and the mud reacts has harm to environment, thereby has increased the expense of sludge disposal.(2) endogenous respiration.As everyone knows, prolongation sludge age or reduction sludge loading can reduce sludge yield.Concerning the conventional activated sludge method, because hydraulic detention time and sludge age can not be distinguished independent control, so this method of employing can cause effluent quality to worsen and processing efficiency reduces.Because membrane bioreactor can distinguish independent control hydraulic detention time and sludge age fully, thus membrane bioreactor can be at long sludge age or operates under the situation of not blowdown mud fully, thereby cause extremely low or even zero sludge yield.But adopt this method can cause serious film to pollute, thereby increase the replacement charge of membrane module, in addition, the sewage sludge viscosity in the membrane bioreactor is big, and dewatering is poor, has increased the expense of sludge dewatering.(3) decoupling zero connection metabolism.Through-rate controlled step-breathing, the anabolism of microorganism and katabolism coupling connection.If do not exist when respiratory control, but biosynthesizing is when becoming the rate-controlling factor, and the uncoupling metabolism will take place microorganism so, and then unnecessary free energy is not just used and do not generated biomass.Therefore, the uncoupling technology is increased in katabolism and anabolic energy (ATP) difference exactly, makes the anabolic energy of supply microorganism become limited, thereby reduces the output of mud.Method commonly used at present is to adopt chemical uncoupling agent.But because chemical uncoupling agent is xenobiotic, the life-time service chemical uncoupler has not only made microorganisms biological fitness has reduced wastewater treatment efficiency, and environment has been had damaging effect.(4) microorganism predation.Utilize former, metazoan predator bacteria in the sewage disposal, thereby reduce the output of mud.Food chain is long more, and power loss is big more, and then the biomass of Chan Shenging is also low more.But because former, metazoan and bacterium syntrophism are in same bio-reactor (aeration tank), and the operational conditions of aeration tank mainly is to be beneficial to microbiological deterioration organism such as bacterium, and not exclusively suitable former, metazoal growth, therefore former, metazoan growth instability, thus the mud decrement DeGrain caused.Compare with other three classes mud decrement technology, the microorganism predation method has significant advantage such as economy and environmental friendliness, is the new technology with development prospect.
Summary of the invention
One of purpose of the present invention is to provide one to be suitable for plug-flow combined biological sludge decrement reactor former, the metazoan stable growth, and the sludge treatment approach of an economical and efficient is provided for sewage work.
Another object of the present invention is to provide a working method that is suitable for the plug-flow combined biological sludge decrement reactor of former, metazoan stable growth.
Plug-flow combined biological sludge decrement reactor of the present invention is made up of former, metazoan vitellarium and solid-liquid separation settling region, it is characterized in that:
Described plug-flow combined biological sludge decrement reactor is a rectangular vessel, by dividing plate container is divided into free former, the metazoan vitellarium 4 of type, and attached type is former, metazoan vitellarium 5 and solid-liquid separation settling region 6; Free type is former, metazoan vitellarium 4 and attached type is former, the dividing plate 8 between the metazoan vitellarium 5 highly is lower than the rectangular vessel sidewall mud mixed liquid import 7, and dividing plate 8 middle parts have aperture; Solid-liquid separation settling region 6 is former in free type, the outside of metazoan vitellarium 4, or the outside former at attached type, metazoan vitellarium 5, solid-liquid separation settling region 6 and attached type are former, metazoan vitellarium 5 or free type is former, dividing plate 9 middle parts between the metazoan vitellarium 4 have aperture, and between dividing plate 9 and the rectangular vessel bottom space are arranged; Constitute that free type is former, metazoan vitellarium 4 or attached type is former, the rectangular vessel side wall upper part of metazoan vitellarium 5 has mud mixed liquid import 7, mud mixed liquid import 7 is connected with mud transferpump 1; Mud discharging mouth 10 is arranged at the top that constitutes the rectangular vessel sidewall of solid-liquid separation settling region 6, and mud refluxing opening 11 is arranged at the bottom of rectangular vessel sidewall, and mud refluxing opening 11 is connected with sludge reflux pump 3.
Described former, metazoan is divided into two kinds of free type and attached types; Protozoon mainly contains ciliate, flagellate, amoeba etc.; Metazoan mainly contains wheel animalcule, campanularian, nematode and oligochaetes worm etc.;
Described mud mixed liquid import 7 be installed in constitute that free type is former, metazoan vitellarium 4 or attached type is former, the rectangular vessel side wall upper part of metazoan vitellarium 5;
Described free type is former, aerator 2 is placed in metazoan vitellarium bottom, and it is former with attached type, usefulness dividing plate 8 separates between the metazoan vitellarium 5, and dividing plate 8 highly is lower than mud mixed liquid import 7, and at dividing plate 8 middle parts aperture is arranged;
Described attached type is former, aerator 2 is placed in bottom, metazoan vitellarium, and aerator 2 tops are equipped with the perforation plate 13 that is used for placing filler 12, and the porosity of perforation plate is 5-10%;
Described filler 12 is to be used for providing suitable habitat for former, the metazoal stable growth of attached type; Can adopt different materials as filler, as plastic three-dimensional honeycomb padding, slag etc.;
Described solid-liquid separation settling region 6 is mounted in an end of plug-flow combined biological sludge decrement reactor, and it is former with attached type, metazoan vitellarium 5 or free type is former, separate with dividing plate 9 between the metazoan vitellarium 4; Dividing plate 9 middle and lower parts have aperture, and between dividing plate 9 and the rectangular vessel bottom space are arranged, so that mud refluxes; The rectangular vessel side wall upper part that constitutes the solid-liquid separation settling region is a mud discharging mouth 10, and mud refluxing opening 11 is at the certain altitude place, bottom of the rectangular vessel sidewall that constitutes the solid-liquid separation settling region.
Plug-flow combined biological sludge decrement reactor of the present invention provides a suitable habitat for former, metazoal stable growth, thereby effectively improves the effect of mud decrement.
Plug-flow combined biological sludge decrement reactor of the present invention and working method thereof both can be used for the decrement treatment of the excess sludge of sewage biological treatment system discharging; Also can be used for handling the returned sluge of conventional activated sludge method, form one, reduce the generation of mud with aeration tank and second pond.
Described mud mixed liquid is the excess sludge of sewage biological treatment system discharging or the returned sluge in the conventional activated sludge system.
The effect that described mud refluxes is to reduce former, metazoal loss, improves former, metazoal density, promotes former, metazoal stable growth.
The working method of plug-flow combined biological sludge decrement reactor of the present invention has two kinds:
First kind of working method is: at first according to certain sludge loading, by the mud mixed liquid import, with the mud transferpump mud mixed liquid (excess sludge of discharging or returned sluge) is delivered to free former, the metazoan vitellarium of type, mud mixed liquid enters successively then that attached type is former, metazoan vitellarium and solid-liquid separation settling region; The thickened sludge of solid-liquid separation settling region bottom is delivered to free former, the metazoan vitellarium of type by sludge reflux pump, and the mud mixed liquid of post precipitation is discharged by mud discharging mouth, the sludge treatment that enters next step with dispose operation (as dehydration etc.).
Or second kind of working method is: at first according to certain sludge loading, by the mud mixed liquid import, with the mud transferpump mud mixed liquid (excess sludge of discharging or returned sluge) is delivered to that attached type is former, the metazoan vitellarium, mud mixed liquid enters successively then that free type is former, metazoan vitellarium and solid-liquid separation settling region; The thickened sludge of solid-liquid separation settling region bottom is delivered to by sludge reflux pump that attached type is former, the metazoan vitellarium, and the mud mixed liquid of post precipitation is discharged by mud discharging mouth, the sludge treatment that enters next step with dispose operation (as dehydration etc.).
The excess sludge of discharging is the mud that second pond from sewage work or sludge thickener are discharged; Returned sluge is the mud that the second pond from sewage work is back to the aeration tank.
Plug-flow combined biological sludge decrement reactor of the present invention and working method thereof can reduce the quantity discharged or the generation of excess sludge, reach the purpose of mud decrement, handle and disposal costs thereby reduce sludge of sewage treatment plants.
Plug-flow combined biological sludge decrement reactor of the present invention and working method thereof can be applicable to the mud decrement of municipal sewage plant and industrial sewage treatment plant and handle.
Equipment of the present invention and working method thereof have following advantage:
1. the system architecture compactness is constructed succinctly, and operation is very simple with maintenance, and manual request is few, easily is automated control.
2. plug-flow combined biological sludge decrement reactor can be former, metazoal stable growth suitable habitat is provided, thereby can improve the mud decrement effect, reduces sludge of sewage treatment plant and handles and the expense of disposing.
3. by former, metazoal predation, plug-flow combined biological sludge decrement reactor can effectively improve sludge settling and dewatering.
Below in conjunction with drawings and Examples plug-flow combined biological sludge decrement reactor of the present invention and working method thereof are further described.
Description of drawings
Fig. 1. the synoptic diagram of plug-flow combined biological sludge decrement reactor of the present invention and working method () thereof;
Fig. 2. the synoptic diagram of plug-flow combined biological sludge decrement reactor of the present invention and working method (two) thereof;
Fig. 3. plug-flow combined biological sludge decrement reactor of the present invention is handled the process flow diagram of excess sludge;
Fig. 4. plug-flow combined biological sludge decrement reactor of the present invention is handled the process flow diagram of returned sluge;
Reference numeral
1. mud transferpump 2. aerators 3. sludge reflux pumps
4. free former, the metazoan vitellarium of type
5. former, the metazoan vitellarium of attached type
6. solid-liquid separation settling region 7. mud mixed liquid imports
8. dividing plate 9. dividing plates 10. mud discharging mouths
11. mud refluxing opening 12. fillers 13. perforation plates
Embodiment
Embodiment 1:
Plug-flow combined biological sludge decrement reactor is to be divided into three parts by dividing plate, they are respectively that free type is former, metazoan vitellarium, attached type are former, metazoan vitellarium and solid-liquid separation settling region, are used for the decrement treatment of the excess sludge of sewage biological treatment system discharging.
With the mud transferpump will be from sewage work second pond or the sludge thickener excess sludge of discharging, be delivered to former, the metazoan vitellarium of free type of plug-flow combined biological sludge decrement reactor, enter successively then that attached type is former, metazoan vitellarium and solid-liquid separation settling region.In the whole service process, keeping the water temperature in the plug-flow combined biological sludge decrement reactor is 20 ℃, pH is 6～9, and wherein free type is former, the activated sludge concentration in the metazoan vitellarium is 3.0～6.0g/l, and attached type is former, the biofilm development of metazoan vitellarium is good.According to certain sludge loading and mud decrement effect, take a certain amount of mud mixed liquid flow and return sludge ratio.
By former, metazoan and the active sludge oxygen supply of aerator in plug-flow combined biological sludge decrement reactor, between active sludge (mainly forming) and former, metazoan, form food chain by bacterium, and by former, metazoal predation, reduce the quantity discharged of excess sludge, thereby reach the purpose of mud decrement.Through free type with attached type is former, the mud mixed liquid behind the metazoan vitellarium enters the solid-liquid separation settling region, former to prevent, the metazoal loss of mud backflow of post precipitation, and the discharging of the supernatant liquor of post precipitation, the sludge treatment and disposal operation that enter next step.
Enter that sludge concentration is 5.73～11.52g/l in the mud mixed liquid of plug-flow combined biological sludge decrement reactor, sludge concentration is 2.67～3.83g/l in the sludge discharged mixed solution, and then the mud decrement ratio is 33～76%, and the mud decrement effect is remarkable.
Plug-flow combined biological sludge decrement reactor is to be divided into three parts by dividing plate, they are respectively that attached type is former, metazoan vitellarium, free type are former, metazoan vitellarium and solid-liquid separation settling region, be used to handle the returned sluge of conventional activated sludge method, form one with aeration tank and second pond, reduce the generation of mud.
The attached type that the returned sluge mixed solution is delivered to plug-flow combined biological sludge decrement reactor is former with the mud transferpump, metazoan vitellarium enter successively then that free type is former, metazoan vitellarium and solid-liquid separation settling region.In the whole service process, keeping the water temperature in the plug-flow combined biological sludge decrement reactor is 20 ℃, pH is 6～9, and wherein free type is former, the activated sludge concentration in the metazoan vitellarium is 3.0～6.0g/l, and attached type is former, the biofilm development of metazoan vitellarium is good.According to certain sludge loading and mud decrement effect, take a certain amount of mud mixed liquid flow and return sludge ratio.
By former, metazoan and the active sludge oxygen supply of aerator in plug-flow combined biological sludge decrement reactor, between active sludge (mainly forming) and former, metazoan, form food chain by bacterium, and by former, metazoal predation, reduce the generation of mud, thereby reach the purpose of mud decrement.Through attached type with free type is former, the mud mixed liquid behind the metazoan vitellarium enters the solid-liquid separation settling region, former to prevent, the metazoal loss of mud backflow of post precipitation, and the discharging of the supernatant liquor of post precipitation, the sludge treatment and disposal operation that enter next step.
The sludge concentration that enters the returned sluge mixed solution of plug-flow combined biological sludge decrement reactor is 5.60～11.36g/l, and sludge yield is 0.2～0.4kgSS/kgCOD
Removed, be significantly less than the sludge yield (0.7～1.0kgSS/kgCOD of conventional activated sludge method
Removed), the mud decrement effect is remarkable.
Claims (5)
1. plug-flow combined biological sludge decrement reactor is made up of former, metazoan vitellarium and solid-liquid separation settling region, it is characterized in that:
Described plug-flow combined biological sludge decrement reactor is a rectangular vessel, by dividing plate container is divided into free type former, metazoan vitellarium (4), and attached type is former, metazoan vitellarium (5) and solid-liquid separation settling region (6); Free type is former, metazoan vitellarium (4) and the mud mixed liquid import (7) that attached type is former, dividing plate (8) between metazoan vitellarium (5) highly is lower than the rectangular vessel sidewall, has aperture in the middle part of the dividing plate (8); Solid-liquid separation settling region (6) is former in free type, the outside of metazoan vitellarium (4), or the outsides former at attached type, metazoan vitellarium (5), solid-liquid separation settling region (6) and attached type is former, metazoan vitellarium (5) or free type is former, the middle part of the dividing plate (9) between metazoan vitellarium (4) has aperture, and dividing plate (9) has the space between bottom rectangular vessel; Constitute that free type is former, metazoan vitellarium (4) or attached type is former, the rectangular vessel side wall upper part of metazoan vitellarium (5) has mud mixed liquid import (7), mud mixed liquid import (7) is connected with mud transferpump (1); Mud discharging mouth (10) is arranged at the top that constitutes the rectangular vessel sidewall of solid-liquid separation settling region (6), and mud refluxing opening (11) is arranged at the bottom of rectangular vessel sidewall, and mud refluxing opening (11) is connected with sludge reflux pump (3);
Described free type is former, aerator (2) is placed in bottom, metazoan vitellarium;
Described attached type is former, aerator (2) is placed in bottom, metazoan vitellarium.
2. reactor as claimed in claim 1 is characterized in that: the top that described attached type is former, aerator (2) is placed in bottom, metazoan vitellarium is equipped with the perforation plate (13) that is used for placing filler (12), and the porosity of perforation plate is 5-10%.
3. reactor as claimed in claim 1 is characterized in that: described filler (12) is plastic three-dimensional honeycomb padding or slag.
4. working method as each described plug-flow combined biological sludge decrement reactor of claim 1～3 is characterized in that:
At first according to certain sludge loading, by the mud mixed liquid import, with the mud transferpump mud mixed liquid is delivered to free former, the metazoan vitellarium of type, mud mixed liquid enters successively then that attached type is former, metazoan vitellarium and solid-liquid separation settling region; The thickened sludge of bottom, solid-liquid separation settling region is delivered to free former, the metazoan vitellarium of type by sludge reflux pump, and the mud mixed liquid of post precipitation is discharged by mud discharging mouth, enters next step sludge treatment and disposal operation;
Or at first according to certain sludge loading, by the mud mixed liquid import, with the mud transferpump mud mixed liquid is delivered to that attached type is former, the metazoan vitellarium, mud mixed liquid enters successively then that free type is former, metazoan vitellarium and solid-liquid separation settling region; The thickened sludge of solid-liquid separation settling region bottom is delivered to by sludge reflux pump that attached type is former, the metazoan vitellarium, and the mud mixed liquid of post precipitation is discharged by mud discharging mouth, the sludge treatment that enters next step with dispose operation.
5. working method as claimed in claim 4 is characterized in that: described mud mixed liquid is the excess sludge of returned sluge or discharging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN021590486A CN1215998C (en) | 2002-12-27 | 2002-12-27 | Push flow composite biological mud volume reducing reactor and its operation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN021590486A CN1215998C (en) | 2002-12-27 | 2002-12-27 | Push flow composite biological mud volume reducing reactor and its operation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1511796A CN1511796A (en) | 2004-07-14 |
| CN1215998C true CN1215998C (en) | 2005-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN021590486A Expired - Fee Related CN1215998C (en) | 2002-12-27 | 2002-12-27 | Push flow composite biological mud volume reducing reactor and its operation method |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100460340C (en) * | 2006-07-07 | 2009-02-11 | 汪群慧 | Process for high performance treatment of organic sewage and reduction of excess sludge output |
| CN101157501B (en) * | 2007-09-14 | 2010-06-09 | 哈尔滨工业大学 | Helminth attaching biological bed for deweighting city sewage sludge |
| CN101786717B (en) * | 2010-02-05 | 2011-09-21 | 哈尔滨工业大学 | Excess sludge reduction bioreactor with variable aeration and worm attachment oblique plate |
| CN102145973B (en) * | 2010-02-08 | 2012-12-26 | 中国石油化工股份有限公司 | Composite uncoupling agent |
| CN102381801B (en) * | 2010-08-30 | 2013-08-14 | 中国石油化工股份有限公司 | Method for treating waste water by membrane bioreactor |
| CN102372405A (en) * | 2011-09-28 | 2012-03-14 | 浙江环科环境研究院有限公司 | System and process for sludge in situ decrement enhanced by utilizing metazoan and application of process |
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2002
- 2002-12-27 CN CN021590486A patent/CN1215998C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN1511796A (en) | 2004-07-14 |
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