CN1778727A - Baffle Sludge reactor with oligachaeta worm reduction - Google Patents
Baffle Sludge reactor with oligachaeta worm reduction Download PDFInfo
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- CN1778727A CN1778727A CNA2004100098472A CN200410009847A CN1778727A CN 1778727 A CN1778727 A CN 1778727A CN A2004100098472 A CNA2004100098472 A CN A2004100098472A CN 200410009847 A CN200410009847 A CN 200410009847A CN 1778727 A CN1778727 A CN 1778727A
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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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Abstract
A baffled oligochaeta worm mud decrement reactor is a container with rectangular opening. A side wall of rectangular container is lower other three side walls, a container(2) is connected with the top of external wall opposed to low side wall and a side wall is also the wall of rectangular wall. The container(2) is mud pretreatment area, a container(2) is connected with the top of external wall, the other three side walls are higher the low side wall and connected to high side wall of rectangular container parallel, a back plate(8) is installed at one side of low side wall of rectangular-opening container, area between back plate(8) and rectangular container is solid-liquid separating settling area(13), area between back plate(8) and high side wall of rectangular container is oligochaeta worm growth area.
Description
Technical field
The invention belongs to and utilize biotechnology to handle the apparatus field of mud, particularly a kind of deflector type oligochaetes worm sludge decrement reactor.
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 weak point is can produce a large amount of excess sludges in the operational process.The America and Europe, the sludge treatment capital cost account for that sewage work's total capital investment cost uses 60%～70%, the sludge system working cost accounts for 40% of overall running cost.According to China's municipal sewage plant's construction plan, by 2010, the mud annual production will reach present five times.If excess sludge can not effectively be handled and be disposed, with directly influencing the normal operation of sewage work, also can cause secondary pollution, work the mischief to public health.
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.But being ozone generating-device, shortcoming needs bigger investment, and the working cost costliness.As replacing, can produce virose byproducts such as trichloromethane again with chlorine.
(2) endogenous respiration.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 shortcoming is to adopt this method can cause serious film to pollute, thereby increases the replacement charge of membrane module, and 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." the Minimization of excesssludge production for biological wastewater treatment " that send at Wei Yuan points out, because chemical uncoupling agent is an xenobiotic, the life-time service chemical uncoupler can make the microorganisms biological fitness, reduce treatment effect, and jeopardize environmentAL safety.
(4) microorganism predation.Utilize former in the sewage disposal, the metazoan predator bacteria, thus 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 the bacterium syntrophism of former metazoan and degradation of contaminant is 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 metazoan, especially the growth of oligochaetes worm, therefore the growth of oligochaetes worm is unstable, thereby causes the mud decrement DeGrain.In mention, compare with other three classes mud decrement technology, the microorganism predation method needn't drop into additional energy and outer adding medicine, running cost is low, significant advantage such as environmental friendliness, be the new technology with development prospect, the oligochaetes worm is verified in " Comparisonperformances of membrane bioreactor (MBR) and conventional activated sludge (CAS) processes on sludgereduction induced by Oligochaete " that Wei Yuan send in the effect aspect the mud decrement.
Summary of the invention
The deflector type oligochaetes worm sludge decrement reactor that provides one to be suitable for oligochaetes worm 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.
The working method that provides one to be suitable for the deflector type oligochaetes worm sludge decrement reactor of oligochaetes worm stable growth is provided.
Deflector type oligochaetes worm sludge decrement reactor of the present invention is mainly by the mud pretreating zone, and oligochaetes worm vitellarium and solid-liquid separation settling region are formed.
One rectangular shaped open container, a sidewall that wherein constitutes rectangular vessel is lower than other three sidewalls, be connected with a container 2 on the outer wall top of rectangular vessel low sidewall opposite side wall, top at the rectangular vessel sidewall has the prosopyle, and a sidewall that constitutes container 2 is a sidewall of rectangular vessel, have mud import 1 on the wall of container 2, this container 2 is the mud pretreating zone; Outer wall top in the rectangular vessel low sidewall is connected with a container 2 ', and a sidewall that constitutes container 2 ' is the low sidewall of rectangular vessel, in addition three sidewalls be higher than low sidewall and with the contour binding of high sidewall of rectangular vessel; Have mud discharging mouth 11 on the wall of container 2 ', have mud refluxing opening 9 in the bottom of rectangular vessel low sidewall, mud refluxing opening 9 is connected with sludge reflux pump 12;
One baffle plate 8, it is mounted in one side of low sidewall in the rectangular shaped open container, and leave the gallery of the circulation of supplying water between the bottom of baffle plate 8 and rectangular shaped open container, zone between the low sidewall of baffle plate 8 and rectangular vessel is solid-liquid separation settling region 13, and the zone between the high sidewall of baffle plate 8 and rectangular vessel is oligochaetes worm vitellarium 3;
Have the prosopyle on the sidewall of the rectangular vessel of described formation container 2, so that water flows to oligochaetes worm vitellarium from the mud pretreating zone;
On the high sidewall of the rectangular vessel on baffle plate 8 that constitutes oligochaetes worm vitellarium 3 and baffle plate 8 opposites, be fixed with supporting plate 4 with glue or supporting structure; The distance between plates of supporting plate 4 is 5～8cm, and every layer of supporting plate is divided into four parts (as separating with the high catch of 1.5cm) with catch, has solarization air cap 5 in the left and right sides of every layer of supporting plate, because aeration guarantees the not short stream of current.Horizontal direction forms horizontal gallery, current along " S " type passes through gallery successively.
One aerator 6 is installed in the bottom, oligochaetes worm vitellarium of rectangular vessel, and aerator 6 links with aeration tube 7;
Described solarization air cap porosity is 30%, and the aperture is 3mm.
One heating unit 10 is installed in the rectangular vessel, makes water temperature remain on the suitable tubificid growth of suitable temperature (20～25 ℃).
Because the container 2 ' that the rectangular vessel low sidewall is connected with its outer wall top forms a V-notch weir exhalant region 14, makes water outlet even.
The mud inlet is right after pretreating zone, and employing is heated and adopted measures such as two side flow deflectors and interpolation filler to mud in this zone, reaches the structure of fluidized-bed, can reach increases the water inlet dissolved oxygen, the mud particle diameter is reduced, mix more evenly with water, be beneficial to eating of oligochaetes worm.
Described oligochaetes worm mainly comprises erythema wooden dipper body worm, fairy maiden worm, tubificid etc., and this installs the cultivation of tubificid preferably.
Deflector type oligochaetes worm sludge decrement reactor of the present invention provides a suitable habitat for the stable growth of oligochaetes worm, thereby effectively improves the effect of mud decrement.
Deflector type oligochaetes worm sludge decrement reactor of the present invention 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, perhaps 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 the loss that reduces the oligochaetes worm, improves the population density of oligochaetes worm, promotes the stable growth of oligochaetes worm.Because the worm reproduction speed is very fast, need the regular purge reactor worm of senescence phase, just can not suppress the worm growth in other stages, so required backflow ratio is very low,, even can not reflux in spring and summer season.
The working method of device of the present invention 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 pretreating zone and carries out aeration aerating, heat and the mud pellet fragmentation, the muddy water mixed solution of improved performance enters oligochaetes worm vitellarium and solid-liquid separation settling region in turn then, and oligochaetes worm vitellarium temperature remains on 20～25 degrees centigrade; Hydraulic detention time is about 12 hours.The thickened sludge part of solid-liquid separation settling region bottom is delivered to pretreating zone by sludge reflux pump, and the mud of post precipitation is by outside the mud discharging mouth discharge system, the sludge treatment that enters next step with dispose operation (as dehydration etc.).
Deflector type oligochaetes worm 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.
Deflector type oligochaetes worm 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. the deflector type oligochaetes worm sludge decrement reactor stable growth that can be the oligochaetes worm 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 the predation of oligochaetes worm, deflector type oligochaetes worm sludge decrement reactor can effectively improve sludge settling and dewatering.
4. adopt three-dimensional supporting plate deflector type structure, can improve bioavailable efficiency, save floor space.
Below in conjunction with drawings and Examples deflector type oligochaetes worm sludge decrement reactor of the present invention is further described.
Description of drawings
Fig. 1. the structural representation of deflector type oligochaetes worm sludge decrement reactor of the present invention;
Fig. 2. deflector type oligochaetes worm sludge decrement reactor of the present invention is handled the process flow diagram of excess sludge;
Fig. 3. deflector type oligochaetes worm sludge decrement reactor of the present invention is handled the process flow diagram of returned sluge.
Reference numeral
1. mud import 2. mud pretreating zones 2 '. V-notch weir water outlet catchment area
3. oligochaetes worm vitellarium 4. supporting plates 5. solarization air caps
6. aerator 7. aeration tubes 8. separation baffles
9. mud refluxing opening 10. heating units 11. mud discharging mouths
12. sludge reflux pump 13. solid-liquid separation settling regions 14. V-notch weir exhalant regions
Embodiment
Embodiment
See also Fig. 1～3.Plug-flow combined biological sludge decrement reactor of the present invention is divided into three parts, and they are respectively the mud pretreating zone, and oligochaetes worm vitellarium and solid-liquid separation settling region are used for the decrement treatment of the excess sludge of sewage biological treatment system discharging.
One rectangular shaped open container, (sidewall of 52cm * 10cm * 36cm) is lower than other three sidewalls wherein to constitute rectangular vessel, be connected with a container 2 (5cm * 10cm * 24cm) on the outer wall top of rectangular vessel low sidewall opposite side wall, top at the rectangular vessel sidewall has the prosopyle, and a sidewall that constitutes container 2 is a sidewall of rectangular vessel, have mud import 1 on the wall of container 2, this container 2 is the mud pretreating zone; Be connected with on the outer wall top of rectangular vessel low sidewall a container 2 ' (5cm * 10cm * 15cm), an and sidewall that constitutes container 2 ' is the low sidewall of rectangular vessel, in addition three sidewalls be higher than low sidewall and with the contour binding of high sidewall of rectangular vessel; The container 2 ' that the rectangular vessel low sidewall is connected with its outer wall top forms a V-notch weir exhalant region 14, makes water outlet even.Have mud discharging mouth 11 on the wall of container 2 ', have mud refluxing opening 9 in the bottom of rectangular vessel low sidewall, mud refluxing opening 9 is connected with sludge reflux pump 12.
One baffle plate 8, it is mounted in one side of low sidewall in the rectangular shaped open container, and leave the gallery of the circulation of supplying water between the bottom of baffle plate 8 and rectangular shaped open container, zone between the low sidewall of baffle plate 8 and rectangular vessel is solid-liquid separation settling region 13, and the zone between the high sidewall of baffle plate 8 and rectangular vessel is oligochaetes worm vitellarium 3.
On the high sidewall of the rectangular vessel on baffle plate 8 that constitutes oligochaetes worm vitellarium 3 and baffle plate 8 opposites, 2 supporting plates are installed respectively respectively, are fixed with glue or supporting structure.The long 46cm of supporting plate, every layer of supporting plate of high 6cm. is divided into four parts between plate and the plate, separates with the catch that 1.5cm is high.Vertical direction forms five horizontal gallerys, current along " S " type is successively by five gallerys.
Have the prosopyle on the sidewall of the rectangular vessel of described formation container 2, so that water flows to oligochaetes worm vitellarium from the mud pretreating zone.
One aerator 6 is installed in the bottom, oligochaetes worm vitellarium of rectangular vessel, and aerator 6 links with aeration tube 7, and aeration tube 7 is connected with air pump with a gas meter.
One heating unit 10 is installed in the rectangular vessel, makes water temperature remain on 20～25 ℃ with suitable tubificid growth.
With the mud transferpump will be from sewage work second pond or the sludge thickener excess sludge of discharging, the mud pretreating zone that is delivered to deflector type oligochaetes worm sludge decrement reactor is heated, oxygenation enters oligochaetes worm vitellarium and solid-liquid separation settling region then successively.In the whole service process, keeping the water temperature in the plug-flow combined biological sludge decrement reactor is 20 ℃, and pH is 6～9, and wherein the activated sludge concentration in the reactor is 3.0～6.0g/l.According to certain sludge loading and mud decrement effect, take a certain amount of mud mixed liquid flow and return sludge ratio.
By oligochaetes worm and the active sludge oxygen supply of aerator in reactor, between active sludge (mainly forming) and oligochaetes worm, form food chain, and, reduce the quantity discharged of excess sludge, thereby reach the purpose of mud decrement by predation by bacterium.Enter the solid-liquid separation settling region through the mud mixed liquid behind the oligochaetes worm vitellarium, the mud of post precipitation refluxes preventing the loss of oligochaetes worm, and the discharging of the supernatant liquor of post precipitation, the sludge treatment that enters next step with dispose operation.
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.
Claims (7)
1. deflector type oligochaetes worm sludge decrement reactor, by the mud pretreating zone, oligochaetes worm vitellarium and solid-liquid separation settling region are formed, and it is characterized in that:
One rectangular shaped open container, a sidewall that wherein constitutes rectangular vessel is lower than other three sidewalls, be connected with a container (2) on the outer wall top of rectangular vessel low sidewall opposite side wall, top at the rectangular vessel sidewall has the prosopyle, and a sidewall that constitutes container (2) is a sidewall of rectangular vessel, have mud import (1) on the wall of container (2), this container (2) is the mud pretreating zone; Be connected with a container (2 ') on the outer wall top of rectangular vessel low sidewall, and a sidewall that constitutes container (2 ') is the low sidewall of rectangular vessel, in addition three sidewalls be higher than low sidewall and with the contour binding of high sidewall of rectangular vessel; On the wall of container (2 '), have mud discharging mouth (11), have mud refluxing opening (9) in the bottom of rectangular vessel low sidewall;
One baffle plate (8), it is mounted in one side of low sidewall in the rectangular shaped open container, and leave the gallery of the circulation of supplying water between the bottom of baffle plate (8) and rectangular shaped open container, zone between the low sidewall of baffle plate (8) and rectangular vessel is solid-liquid separation settling region (13), and the zone between the high sidewall of baffle plate (8) and rectangular vessel is oligochaetes worm vitellarium (3);
On the high sidewall of the rectangular vessel on baffle plate (8) that constitutes oligochaetes worm vitellarium (3) and baffle plate (8) opposite, be fixed with supporting plate (4) with glue or supporting structure; Have solarization air cap (5) in the left and right sides of every layer of supporting plate;
One aerator (6) is installed in the bottom, oligochaetes worm vitellarium of rectangular vessel, and aerator (6) links with aeration tube (7).
2. reactor according to claim 1 is characterized in that: described solarization air cap punching rate is 30%, and the aperture is 3mm.
3. reactor according to claim 1 is characterized in that: heating unit (10) is installed in the described rectangular vessel.
4. reactor according to claim 1 is characterized in that: described mud refluxing opening (9) is connected with a sludge reflux pump (12).
5. reactor as claimed in claim 1 is characterized in that: described mud mixed liquid is the excess sludge of returned sluge or discharging.
6. reactor as claimed in claim 1 is characterized in that: the distance between plates of described supporting plate (4) is 5～8cm.
7. as claim 1 or 6 described reactors, it is characterized in that: described supporting plate (4) is divided into four parts with catch.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100098472A CN1321921C (en) | 2004-11-23 | 2004-11-23 | Baffle Sludge reactor with oligachaeta worm reduction |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2004100098472A CN1321921C (en) | 2004-11-23 | 2004-11-23 | Baffle Sludge reactor with oligachaeta worm reduction |
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| Publication Number | Publication Date |
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| CN1778727A true CN1778727A (en) | 2006-05-31 |
| CN1321921C CN1321921C (en) | 2007-06-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2004100098472A Expired - Fee Related CN1321921C (en) | 2004-11-23 | 2004-11-23 | Baffle Sludge reactor with oligachaeta worm reduction |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101157501B (en) * | 2007-09-14 | 2010-06-09 | 哈尔滨工业大学 | Helminth attaching biological bed for deweighting city sewage sludge |
| CN101880080A (en) * | 2010-07-02 | 2010-11-10 | 哈尔滨工程大学 | Airlift multi-stage loop membrane bioreactor with worm bed |
| 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 |
| CN102807304A (en) * | 2012-07-05 | 2012-12-05 | 广东工业大学 | Multilayer distributed worm reactor for urban sludge reduction treatment |
| CN102910737A (en) * | 2012-10-20 | 2013-02-06 | 北京工业大学 | Device and method for culturing and separating chironomus larvas for reducing sludge |
| CN105110477A (en) * | 2015-09-25 | 2015-12-02 | 哈尔滨工业大学 | Miniature animal attaching packing |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6303844B1 (en) * | 1998-12-09 | 2001-10-16 | Taiheiyo Cement Corporation | Method of decontaminating medium containing polychlorinated biphenyls or dioxins |
| CN2410294Y (en) * | 2000-02-25 | 2000-12-13 | 刘红 | Sewage purifier by microorganism used |
-
2004
- 2004-11-23 CN CNB2004100098472A patent/CN1321921C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN101880080A (en) * | 2010-07-02 | 2010-11-10 | 哈尔滨工程大学 | Airlift multi-stage loop membrane bioreactor with worm bed |
| CN102807304A (en) * | 2012-07-05 | 2012-12-05 | 广东工业大学 | Multilayer distributed worm reactor for urban sludge reduction treatment |
| CN102910737A (en) * | 2012-10-20 | 2013-02-06 | 北京工业大学 | Device and method for culturing and separating chironomus larvas for reducing sludge |
| CN102910737B (en) * | 2012-10-20 | 2014-02-26 | 北京工业大学 | Device and method for culturing and separating chironomus larvas for reducing sludge |
| CN105110477A (en) * | 2015-09-25 | 2015-12-02 | 哈尔滨工业大学 | Miniature animal attaching packing |
| CN105110477B (en) * | 2015-09-25 | 2017-11-03 | 哈尔滨工业大学 | A kind of microfauna attachment filler |
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|---|---|
| CN1321921C (en) | 2007-06-20 |
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