CN1268561C - Vertical flow composite type biological sludge minimization reactor and its operation method - Google Patents
Vertical flow composite type biological sludge minimization reactor and its operation method Download PDFInfo
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- CN1268561C CN1268561C CNB2003101157219A CN200310115721A CN1268561C CN 1268561 C CN1268561 C CN 1268561C CN B2003101157219 A CNB2003101157219 A CN B2003101157219A CN 200310115721 A CN200310115721 A CN 200310115721A CN 1268561 C CN1268561 C CN 1268561C
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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 relates to a device for processing sludge by utilizing biological technique, particularly to a push flow composite biological sludge reducing reactor and an operation method thereof. The push flow composite biological sludge reducing reactor is divided into a dissociated protozoan and metazoan growing region, an attachment protozoan and metazoan growing region, and a solid and liquid separation settling zone by a partition board; the push flow composite biological sludge reducing reactor respectively provides a proper habitat for different types of protozoa and metazoan for stable growth, and thus, the sludge reduction effect is effectively improved. The push flow composite biological sludge reducing reactor and the operation method thereof 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 push flow composite biological sludge reducing reactor can reduce the generated quantity of the sludge through 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 perpendicular stream 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 metabolism of decoupling zero connection will take place microorganism so, and then unnecessary free energy is not just used and do not generated biomass.Therefore, decoupling zero connection 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, life-time service chemistry uncoupling agent has not only made microorganisms biological fitness has reduced wastewater treatment efficiency, and environment has been had damaging effect.(4) microorganism predation.Utilize protozoon and 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 protozoon and 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 protozoon and metazoal growth, therefore the growth of protozoon and metazoan is unstable, thereby causes the mud decrement DeGrain.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
The perpendicular stream combined biological sludge decrement reactor that provides one to be suitable for protozoon and metazoan stable growth is provided one of purpose of the present invention, 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 perpendicular stream combined biological sludge decrement reactor of protozoon and metazoan stable growth (upward flow and down to stream).
Perpendicular stream combined biological sludge decrement reactor of the present invention is made up of free type protozoon and metazoan vitellarium, attached type protozoon and metazoan vitellarium and solid-liquid separation settling region, it is characterized in that:
One columniform perpendicular stream combined biological sludge decrement reactor is divided into free type protozoon and metazoan vitellarium 3, attached type protozoon and metazoan vitellarium 4 and solid-liquid separation settling region 5 by dividing plate with reactor; Solid-liquid separation settling region 5 is on the top of attached type protozoon and metazoan vitellarium 4;
Mud mixed liquid import 8 is arranged at the bottom in the sidewall of reactor of described free type protozoon and metazoan vitellarium 3, on the top of the sidewall of reactor of solid-liquid separation settling region 5 mud discharging mouth 9 is arranged, and mud mixed liquid import 8 is connected with mud transferpump 1;
One mounting height is higher than the perforation dividing plate 6 of sidewall of reactor mud mixed liquid import 8, and described free type protozoon and metazoan vitellarium 3 are separated with attached type protozoon and metazoan vitellarium 4;
One mounting height is lower than the perforation dividing plate 7 of sidewall of reactor mud discharging mouth 9, and described attached type protozoon and metazoan vitellarium 4 are separated with solid-liquid separation settling region 5;
In described free type protozoon and metazoan vitellarium 3, aerator 2 is installed, described aerator 2 is communicated with air compressor or gas blower 11 by pipeline, utilizes air compressor or gas blower 11 to carry out aeration by aerator 2 to whole reactor;
Or
One columniform perpendicular stream combined biological sludge decrement reactor is divided into free type protozoon and metazoan vitellarium 3, attached type protozoon and metazoan vitellarium 4 and solid-liquid separation settling region 5 by dividing plate with reactor; Solid-liquid separation settling region 5 is on the top of attached type protozoon and metazoan vitellarium 4;
One mounting height is higher than the perforation dividing plate 6 of sidewall of reactor mud discharging mouth 9, and described free type protozoon and metazoan vitellarium 3 are separated with attached type protozoon and metazoan vitellarium 4;
One mounting height is lower than the perforation dividing plate 7 of sidewall of reactor mud mixed liquid import 8, and described attached type protozoon and metazoan vitellarium 4 are separated with solid-liquid separation settling region 5.
In described free type protozoon and metazoan vitellarium 3, aerator 2 is installed, described aerator 2 is communicated with air compressor or gas blower 11 by pipeline, utilizes air compressor or gas blower 11 to carry out aeration by aerator 2 to whole reactor.
Described protozoon and metazoan are 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 8 is installed in the cylindrical reactor side wall upper part that constitutes free type protozoon and metazoan vitellarium 4 or solid-liquid depositing separation area 5;
Described free type protozoon and 3 bottoms, metazoan vitellarium further are placed with aerator 2, its with attached type protozoon and metazoan vitellarium 4 between with the perforation dividing plate 6 separate, perforation dividing plate 6 mounting heights are higher than mud mixed liquid import 8 or mud discharging mouth 9, and the porosity of perforation dividing plate 6 is 5～10%; The aperture is 3～5mm.
Described filler 10 is to be placed in attached type protozoon and the metazoan vitellarium 4, is to be used for providing suitable habitat for attached type protozoon and metazoal stable growth; Can adopt different materials as filler, as plastic filler or slag etc.;
Described solid-liquid separation settling region 5 is installed in the top of perpendicular stream combined biological sludge decrement reactor, its with attached type protozoon and metazoan vitellarium 4 between separate with perforation dividing plate 7, the porosity of the dividing plate 7 of boring a hole is 5～10%.The aperture is 3～5mm.
Perpendicular stream combined biological sludge decrement reactor of the present invention provides a suitable habitat for protozoon and metazoal stable growth, thereby effectively improves the effect of mud decrement.
Perpendicular stream 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 working method of perpendicular stream combined biological sludge decrement reactor of the present invention has two kinds:
First kind of working method is: according to sludge loading, with mud transferpump 1 mud mixed liquid (excess sludge of discharging or returned sluge) is delivered to free type protozoon and metazoan vitellarium 3 through mud mixed liquid import 8, make mud mixed liquid enter attached type protozoon and the metazoan vitellarium 4 that filler 10 is housed by the hole on the perforation dividing plate 6, mud mixed liquid enters solid-liquid separation settling region 5 by the hole on the perforation dividing plate 7 then; The supernatant liquor of the mud mixed liquid of solid-liquid separation settling region 5 post precipitations is discharged by mud discharging mouth 9, the sludge treatment that enters next step with dispose operation (as dehydration etc.) or be back to the aeration tank.Utilize air compressor or gas blower 11 to carry out aeration to whole reactor by aerator 2.
Or second kind of working method is: according to sludge loading, with mud transferpump 1 mud mixed liquid (excess sludge of discharging or returned sluge) is delivered to solid-liquid separation settling region 5 through mud mixed liquid import 8, make mud mixed liquid enter attached type protozoon and the metazoan vitellarium 4 that filler 10 is housed by the hole on the perforation dividing plate 6, mud mixed liquid enters free type protozoon and metazoan vitellarium 3 by the hole on the perforation dividing plate 7 then; The height that goes out open height and mud mixed liquid import 8 of mud discharging mouth 9 maintains an equal level, discharge through the solid-liquid separation post precipitation to guarantee mud, the mud supernatant liquor of post precipitation is discharged by mud discharging mouth 9, thus the sludge treatment that enters next step with dispose operation (as dehydration etc.) or be back to the aeration tank.Utilize air compressor or gas blower 11 to carry out aeration to whole reactor by aerator 2.
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.
Perpendicular stream 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.
Perpendicular stream 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. perpendicular stream combined biological sludge decrement reactor can be protozoon and metazoal stable growth provides suitable habitat, thereby can improve the mud decrement effect, reduces sludge of sewage treatment plant and handles and the expense of disposing.
3. by protozoon and metazoal predation, perpendicular stream combined biological sludge decrement reactor can effectively improve sludge settling and dewatering.
Below in conjunction with drawings and Examples perpendicular stream 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 perpendicular stream combined biological sludge decrement reactor of the present invention and working method () thereof;
Fig. 2. the synoptic diagram of perpendicular stream combined biological sludge decrement reactor of the present invention and working method (two) thereof;
Fig. 3. perpendicular stream combined biological sludge decrement reactor of the present invention is handled the process flow diagram of excess sludge;
Fig. 4. perpendicular stream 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. free type protozoon and metazoan vitellarium
4. attached type protozoon and metazoan vitellarium
5. solid-liquid separation settling region 6. perforation dividing plates
7. perforation dividing plate 8. mud mixed liquid imports
9. mud discharging mouth 10. fillers
11. air compressor or gas blower
Embodiment
Embodiment 1:
See also Fig. 1 and 3.One columniform perpendicular stream combined biological sludge decrement reactor, by porosity is 5～10%, the perforation dividing plate of aperture 3～5mm is divided into free type protozoon and metazoan vitellarium 3, attached type protozoon and metazoan vitellarium 4 and solid-liquid separation settling region 5, is used for the decrement treatment of the excess sludge of sewage biological treatment system discharging.
Mud mixed liquid import 8 is arranged at the bottom in the sidewall of reactor of described free type protozoon and metazoan vitellarium 3, on the top of the sidewall of reactor of solid-liquid separation settling region 5 mud discharging mouth 9 is arranged, and mud mixed liquid import 8 is connected with mud transferpump 1.
In free type protozoon and metazoan vitellarium 3, the aerator 2 that is communicated with air compressor or gas blower 11 is housed, carries out aeration to whole reactor by aerator 2.
With the mud transferpump will be from sewage work second pond or the sludge thickener excess sludge of discharging, be delivered to the free type protozoon and the metazoan vitellarium of perpendicular stream combined biological sludge decrement reactor, enter attached type protozoon and metazoan vitellarium and solid-liquid separation settling region then successively.In the whole service process, keeping the water temperature in the perpendicular stream combined biological sludge decrement reactor is 20 ℃, pH is 6～9, activated sludge concentration in wherein free type protozoon and the metazoan vitellarium is 3.0～6.0g/L, and the biofilm development of attached type protozoon and metazoan vitellarium is good.
By protozoon and metazoan (as oligochaetes worm) and the active sludge oxygen supply of aerator in perpendicular stream combined biological sludge decrement reactor, between active sludge (mainly forming) and protozoon and metazoan (as the oligochaetes worm), form food chain by bacterium, and the predation by protozoon and metazoan (as the oligochaetes worm), reduce the quantity discharged of excess sludge, thereby reach the purpose of mud decrement.Enter the solid-liquid separation settling region through the mud mixed liquid behind free type and attached type protozoon and the metazoan vitellarium, the supernatant liquor discharging of post precipitation, the sludge treatment and disposal operation that enter next step.
Enter that average sludge concentration is 5.42 ± 3.25g/L in the mud mixed liquid of perpendicular stream combined biological sludge decrement reactor, sludge concentration is 2.04 ± 1.35g/L in the sludge discharged mixed solution, then the mud decrement ratio is 48.36 ± 44.76%, and the mud decrement effect is remarkable.
Embodiment 2
See also Fig. 2 and 4.One columniform perpendicular stream combined biological sludge decrement reactor, by porosity is 5～10%, the perforation dividing plate of aperture 3～5mm is divided into free type protozoon and metazoan vitellarium 3, attached type protozoon and metazoan vitellarium 4 and solid-liquid separation settling region 5, 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.
In free type protozoon and metazoan vitellarium 3, the aerator 2 that is communicated with air compressor or gas blower 11 is arranged, carry out aeration to whole reactor by aerator 2.
With the mud transferpump returned sluge mixed solution is delivered to the perpendicular solid-liquid separation settling region that flows the combined biological sludge decrement reactor, enters attached type protozoon and metazoan vitellarium and free type protozoon and metazoan vitellarium then successively.In the whole service process, keeping the water temperature in the perpendicular stream combined biological sludge decrement reactor is 20 ℃, pH is 6～9, activated sludge concentration in wherein free type protozoon and the metazoan vitellarium is 2.07～8.86g/l, and the biofilm development of attached type protozoon and metazoan vitellarium is good.
By protozoon and metazoan (as oligochaetes worm) and the active sludge oxygen supply of aerator in perpendicular stream combined biological sludge decrement reactor, between active sludge (mainly forming) and protozoon and metazoan (as the oligochaetes worm), form food chain by bacterium, and the predation by protozoon and metazoan (as the oligochaetes worm), reduce the generation of mud, thereby reach the purpose of mud decrement.Enter the solid-liquid separation settling region through the mud mixed liquid behind attached type and free type protozoon and the metazoan vitellarium, the supernatant liquor of post precipitation enters the aeration tank.
The sludge concentration that enters the returned sluge mixed solution of perpendicular stream combined biological sludge decrement reactor is 5.60～11.36g/l, and sludge yield is 0.20～0.40kgSS/kgCOD
Removed, be significantly less than the sludge yield (0.70～1.00kgSS/kgCOD of conventional activated sludge method
Removed), the mud decrement effect is remarkable.
Claims (6)
1. perpendicular stream combined biological sludge decrement reactor is made up of free type protozoon and metazoan vitellarium, attached type protozoon and metazoan vitellarium and solid-liquid separation settling region, it is characterized in that:
One perpendicular stream combined biological sludge decrement reactor is divided into free type protozoon and metazoan vitellarium (3), attached type protozoon and metazoan vitellarium (4) and solid-liquid separation settling region (5) by dividing plate with reactor; Solid-liquid separation settling region (5) is on the top of attached type protozoon and metazoan vitellarium (4);
Mud mixed liquid import (8) is arranged at the bottom in the sidewall of reactor of described free type protozoon and metazoan vitellarium (3), mud discharging mouth (9) is arranged at the top in the sidewall of reactor of solid-liquid separation settling region (5), and mud mixed liquid import (8) is connected with mud transferpump (1);
One mounting height is higher than the perforation dividing plate (6) of container side wall mud mixed liquid import (8), and described free type protozoon and metazoan vitellarium (3) are separated with attached type protozoon and metazoan vitellarium (4);
One mounting height is lower than the perforation dividing plate (7) of sidewall of reactor mud discharging mouth (9), and described attached type protozoon and metazoan vitellarium (4) are separated with solid-liquid separation settling region (5);
Aerator (2) is placed in described free type protozoon and bottom, metazoan vitellarium.
2. reactor as claimed in claim 1 is characterized in that: the porosity of described perforation dividing plate (6,7) is 5～10%; The aperture is 3～5mm.
3. reactor as claimed in claim 1 is characterized in that: described reactor is columniform reactor.
4. working method as each described perpendicular stream combined biological sludge decrement reactor of claim 1～3 is characterized in that:
According to sludge loading, with mud transferpump (1) mud mixed liquid is delivered to free type protozoon and metazoan vitellarium (3) through mud mixed liquid import (8), make mud mixed liquid enter attached type protozoon and metazoan vitellarium (4) that filler (10) is housed by the hole on the dividing plate of boring a hole (6), mud mixed liquid enters solid-liquid separation settling region (5) by the hole on the perforation dividing plate (7) then; The supernatant liquor of the mud mixed liquid of solid-liquid separation settling region (5) post precipitation is discharged by mud discharging mouth (9), enters next step sludge treatment and disposal operation or is back to the aeration tank;
Utilize air compressor or gas blower (11) to carry out aeration to whole reactor in the described working method by aerator (2).
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.
6. working method as claimed in claim 4 is characterized in that: described filler (10) is plastic filler or slag.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNB2003101157219A CN1268561C (en) | 2003-11-28 | 2003-11-28 | Vertical flow composite type biological sludge minimization reactor and its operation method |
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| CNB2003101157219A CN1268561C (en) | 2003-11-28 | 2003-11-28 | Vertical flow composite type biological sludge minimization reactor and its operation method |
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| CN1268561C true CN1268561C (en) | 2006-08-09 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101157501B (en) * | 2007-09-14 | 2010-06-09 | 哈尔滨工业大学 | Helminth attaching biological bed for deweighting city sewage sludge |
| CN101746922B (en) * | 2008-12-22 | 2011-06-01 | 中国科学院生态环境研究中心 | System for treatment and recycling of courtyard domestic sewage and method for treatment of sewage |
| CN105084550B (en) * | 2014-04-15 | 2017-10-03 | 中国石油化工股份有限公司 | A kind of design method of activated sludge absorption bed |
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