CN100375724C - Baffle-board reactor and method for treating sewage by using it - Google Patents

Baffle-board reactor and method for treating sewage by using it Download PDF

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Publication number
CN100375724C
CN100375724C CNB2006100120704A CN200610012070A CN100375724C CN 100375724 C CN100375724 C CN 100375724C CN B2006100120704 A CNB2006100120704 A CN B2006100120704A CN 200610012070 A CN200610012070 A CN 200610012070A CN 100375724 C CN100375724 C CN 100375724C
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unit
water
anaerobic
sewage
aerobic
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CN1850655A (en
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邢新会
于安峰
周育楠
冯权
初里冰
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Tsinghua University
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Tsinghua University
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Abstract

The present invention relates to a baffle plate reactor and a method for processing sewage by the baffle plate reactor through repeated coupling of aerobic microbes and anaerobic microbes, which belongs to the technical field of water processing. The reactor comprises a cuboid, an aerator, division baffle plates, diversion baffle plates, a water inlet at one end, and a water outlet at the other end, wherein the cuboid is provided with a plurality of the vertical division baffle plates and the diversion baffle plates in the water flow direction, and the reactor repeatedly appears on aerobic units with the aerator and anaerobic units without the aerator in the water flow direction; the sewage enters the reactor from the water inlet and is repeatedly coupled by the aerobic units and the anaerobic units in a baffling mode, and the sewage is discharged out of the reactor; thus, the sewage is processed. The present invention constructing the new baffle plate reactor used for processing the sewage can remove organic substances and nitrogen in the sewage efficiently, and sewage treatment and sludge reduction are simultaneously carried out; the present invention has the advantages that procedures of sludge settling and excess sludge processing can be omitted, and the cost of foundation construction and operation is saved.

Description

A kind of baffled reactor and the method for disposing of sewage thereof
Technical field
The present invention relates to a kind of baffled reactor and use this baffled reactor to realize aerobic-anaerobion method of coupling treatment of sewage water repeatedly, belong to water-treatment technology field.
Background technology
Along with the quickening of Urbanization in China, the sustainable growth of population, quantity of wastewater effluent also presents the trend that improves day by day.According to Environment Protect in China long-range objectives outline, national wastewater treatment rate of establishing the city, city was not less than 60% in 2010, and the wastewater treatment rate of key cities is not less than 70%, reach this target and need build large quantities of municipal sewage plants in quinquenniad.The municipal sewage plant adopts biological process more at present.Biological process comprises activated sludge process and biomembrance process.Activated sludge process has become the most widely used a kind of biological treatment in the whole world since beginning to be applied to sewage disposal at the beginning of last century.Along with the continuous development of industrialization and urbanization, urban wastewater discharge increases year by year, and the problem exposed day by day that traditional activated sludge process exists is come out, and wherein a large amount of generations of excess sludge are one of problems of needing badly solution.In the traditional activated sludge process, every removal 1kgBOD 5Will produce the excess sludge (moisture percentage in sewage sludge 95%) of 15-100L.The water ratio height of excess sludge, the organic content height, heavy metal content height in some sewage work's sludge discharged, these make that all excess sludge is easy to generate secondary pollution.
That the treatment scheme of excess sludge before transporting sewage work mainly comprises is concentrated, dehydration, digestion.Excess sludge after the processing also needs to carry out disposal process such as landfill, compost and burning.Processing and disposal costs to excess sludge can account for the 40%-60% of entire sewage treatment plant, and this will certainly improve the cost of wastewater treatment.Fundamentally solve the problem of excess sludge, just need to realize the minimizing of excess sludge.The investigator for example adopts chemistry or physical method dissolving excess sludge also in some mud decrement technology of research both at home and abroad in recent years, makes the microorganism cells fragmentation in the mud, and discharges organism wherein, is back to further degraded in the aeration tank then; Perhaps adopt membrane bioreactor to realize higher sludge concentration, reduce the yield coefficient of mud.From the document of having reported, these methods can make mud reduce to a certain extent, but still can not thoroughly solve the excess sludge problem, and have process cost or the high problem of cost of equipment.
Patent " aerobic-anaerobion is coupling treatment of sewage water novel process (patent No. 200310121766.7) repeatedly " adopts fluidized-bed and fixed bed tandem process, in fixed bed, utilize porous support and interval aeration process to realize that the aerobic-anaerobism on the different levels is coupled repeatedly, thereby in can organism and nitrogen compound in disposing of sewage, the decomposition in situ excess sludge.This arts demand uses the porous support fixation of microbe, though effect is fine, can improve the cost of device to a certain extent.If can develop a kind of easyly with sewage and isolating method of the microorganism residence time, just can utilize aerobic-anaerobism coupled principle, realize the purpose of sewage disposal and mud decrement less expensively.
Patent " anaerobic baffled reactor (patent No. 200420068573.X) " adopts the reactor of sealing, has made up anaerobic baffled reactor.This reactor can be realized the residence time separation of anaerobic sludge and sewage, thereby obtained good anaerobic treatment effect, but because whole reactor does not have aeration, it is single anaerobic environment, so water outlet COD difficulty reaches emission standard, and can not realize the decrement of mud also needing to discharge a certain amount of mud.Aerobic baffled reactor after the first anaerobism of patent " integral type high concentrated organic wastewater treatment unit (patent No. 200310100513.1) " employing, its process is to adopt anaerobic sludge that the organic matter in the high concentrated organic wastewater is carried out acidifying, and then utilize aerobic sludge further to handle, though effluent quality is qualified, but do not relate to the repeatedly coupling of anaerobic process and aerobic processes, do not relate to the content of excess sludge reduction yet.
Summary of the invention
The objective of the invention is at the problem that produces a large amount of excess sludges in the present wastewater treatment process, aerobic-anaerobism coupling is handled the novel method of waste water, is carried out when reaching sewage disposal and mud decrement to adopt baffled reactor to realize.
The reactor that the present invention relates to is as described below:
A kind of baffled reactor is characterized in that: this reactor is open rectangular parallelepiped, comprises being placed on rectangular intravital aerating apparatus, separation baffles, flow apron;
There is water-in the upper end of this rectangular parallelepiped one end, and the other end sets out the mouth of a river;
Rectangular parallelepiped is provided with some vertical separation baffles and flow apron along water (flow) direction;
The separation baffles bottom was connected with the end of rectangular parallelepiped, the height of separation baffles is lower than the height of rectangular parallelepiped and is equal with the water surface, with the corresponding independently unit of even number that is divided into of whole rectangular parallelepiped along continuous straight runs, make water flow into next unit through separation baffles from a unit in the overflow mode;
Remove outlet aeration unit and outlet precipitation unit, vertical flow apron is set in each unit, the position of flow apron is at forward and backward each 1/5 place of odd number separation baffles; The upper end of flow apron will be higher than the water surface, and the bottom can make water pass through, and makes water flow through corresponding units in the mode of baffling;
From feed-water end, the bottom aerating apparatus is set in odd location, aerobic unit is arranged in these unit; Remaining unit is not provided with aerating apparatus, forms anaerobic unit, and anaerobic unit does not need sealing, and promptly the realization response device is in the appearance repeatedly along the anaerobic unit of aerobic unit that aerating apparatus is arranged on the water (flow) direction and no aerating apparatus; Water is with the mode of the baffling whole reactor of flowing through;
This rectangular parallelepiped is setting gradually the outlet aeration unit and is exporting precipitation unit by two unit of water (flow) direction near exit end.
It is as described below to utilize this reactor to carry out the method for sewage disposal:
(1) sewage enters Unit the 1st from water-in;
Aerating apparatus aeration in Unit (2) the 1st, sewage is handled under the effect of aerobic sludge, removes COD and nitrogen-containing pollutant in the decontaminated water; Sewage after the processing entered for the 1st unitary ascent stage under the effect of flow apron, because the gravity settling effect of mud, a part of mud is retained in Unit the 1st, and it is anaerobic unit that the water after another part mud and the processing enters Unit the 2nd;
(3) after sewage enters Unit the 2nd and is anaerobic unit, at first arrive the bottom of anaerobic unit, flow through ascent stage of anaerobic unit in the mode of up-flow then by downcomer.Because the effect of damming of anaerobic unit anaerobic sludge, aerobic sludge dams in anaerobic unit in the feasible water inlet, and anaerobic digestion takes place.It is aerobic unit that the product of sewage and anaerobic digestion enters Unit the 3rd;
Unitary treating processes repeated similar the 2nd step and the 3rd step treating processes after Unit (4) the 3rd reached, up to effluent stream inlet/outlet aeration unit;
When the water process after (5) step (4) is handled exported aeration unit, the dissolved oxygen in the water obtained further replenishing, and reaches emission standard; The a small amount of suspended solids that contains in the water is further precipitation removal in the outlet precipitation unit;
(6) discharge reactor through the water after the above process processing through water outlet, water has just obtained processing like this.
Reactor of the present invention and sewage treatment method are to carry out when being coupled realization wastewater treatment and mud decrement repeatedly with aerobic-anaerobion, and its principle of disposing of sewage is:
(1) waste water that contains organic pollutant enters aerobic unit, and under the effect of aerobic sludge, organism is degraded by microorganisms, and a part is transformed into CO 2, another part generation anabolism is transformed into replicating microorganism, just said excess sludge;
(2) current after aeration is handled are when ascent stage of aerobic unit, owing to there is not the stirring action of aeration, mud in the water separates with water because of settlement action, again return the aeration zone of aerobic unit, thereby can realize higher sludge concentration at aerobic unit, improve organic clearance, reduce the ratio multiplication rate of mud; Indissociable aerobic sludge or excessive mud flow into next anaerobic zone with water;
(3) in anaerobic zone, because the shortage of oxygen, this part mud is dead gradually, discharges the part intracellular organic matter; The anaerobic sludge excretory extracellular enzyme of growing in the anaerobic zone also can promote the degraded of aerobic sludge simultaneously; Mud just is transformed into CO under the metabolism of anaerobic sludge like this 2And new organism, this part organism enters into next aerobic zone, has carried out oxygen metabolism once more;
(4) arranged in series of a plurality of aerobic units and anaerobic unit makes organic matter multiple conversions between soluble substance and mud form in the waste water, and switching process each time all can some CO 2Generate and discharge this reaction system; Simultaneously, the replacement repeatedly of aerobic-anaerobic environment makes the nitrification and denitrification reaction also repeatedly take place, thereby has realized removing the purpose of nitrogen element in the waste water, thereby has removed the eutrophy effect of sewage.In a word, aerobic-anaerobic alternate environment makes that organism is finally with CO in the former water 2, H 2O and N 2Form discharge system in, realized the dual purpose of organic matter removal and mud decrement in the sewage;
(5) mainly by separation baffles decision, flow apron mainly plays the effect of water conservancy diversion to the aerobic-anaerobic treating processes, makes water with the mode of the baffling whole reactor of flowing through.
The present invention is based on aerobic-anaerobion is coupling technique repeatedly, makes up new baffled reactor sewage is handled, and carries out when realizing sewage disposal and mud decrement.The present invention compares with above-mentioned technology, this technology has following advantage: can efficiently remove organism and nitrogen in the sewage, realize thorough metabolism and the decomposition of SS under aerobic-anaerobism is coupled environment repeatedly simultaneously, make excess sludge in the sewage disposal reaction process, obtain degraded, thereby can save sludge settling and excess sludge treatment step, save capital construction and working cost; The baffle position of aerobic unit and anaerobic unit is provided with different, can guarantee sludge concentration higher in the aeration zone on the one hand, improve organic removal efficient, also can regulate the water (flow) direction in the anaerobic zone on the other hand, realize the thorough mixing of water and anaerobic sludge.
Description of drawings
Fig. 1 is a kind of side-view of traditional baffled reactor.Only there is single anaerobic environment in the reactor sealing.
Fig. 2 is aerobic-anaerobion coupled baffled reactor side-view repeatedly, among the figure, 1. being water inlet pipe, 2. is aerobic unit, 3. be anaerobic unit, 4. being the aerobic zone flow apron, 5. is the anaerobic zone flow apron, 6. is the outlet aeration zone, 7. be the outlet settling tank, 8. being rising pipe, 9. is separation baffles, 10. is aerating apparatus.
Fig. 3 is aerobic-anaerobion coupled baffled reactor vertical view repeatedly, and wherein, ⊙ represents that water (flow) direction is that vertical paper is outside;  represents that water (flow) direction is that vertical paper is inside;
Fig. 4 is the series system vertical view of coupling baffled reactor aerobic unit and anaerobic unit, and figure (a) is a rectangular parallelepiped formula reactor, and figure (b) is the reactor of another kind of form.
Embodiment
Fig. 1 tradition baffled reactor, owing to there is not the aeration system, so be entirely anaerobic environment, baffle position is provided with single in the reactor.
Fig. 2 is a baffled reactor side-view of the present invention, and promptly aerobic-anaerobion is coupled baffled reactor side-view repeatedly.Among the figure, 1. being water inlet pipe, 2. is aerobic unit, 3. is anaerobic unit, 4. is the aerobic zone baffle plate, 5. is the anaerobic zone baffle plate, 6. is the outlet aeration zone, 7. is the outlet settling tank, 8. is rising pipe, 9. is dividing plate, 10. is aerating apparatus.
The inventive method is to utilize baffled reactor to realize the novel method of aerobic-anaerobion coupling treatment of sewage water.In conjunction with Fig. 2 the present invention is described in detail.
2. and 3. described baffled reactor is to adopt along highly consistent dividing plate is set on the water (flow) direction, as 9., whole reactor is divided into independently unit, as; One vertical baffle plate is set in each unit, makes water with the mode of the baffling whole reactor of flowing through.In separate unit, adopt aeration (aerating system as 10.) or do not have the mode of aeration, along water (flow) direction structure alternative aerobic unit (as 2.) and anaerobic unit (as 3.); In aerobic unit, 4. baffle plate is close to unitary water outlet side, and the volume ratio of aeration section and ascent stage is 5: 1; In anaerobic unit, 5. baffle plate is arranged at unitary influent side, and downcomer in the anaerobic zone and the volume ratio of ascent stage are 1: 5; In order to make water outlet reach emission standard, be provided with in the outlet position outlet aeration zone 6. with the outlet settling tank 7..Fig. 3 is aerobic-anaerobion coupled baffled reactor vertical view repeatedly, and wherein, ⊙ represents that water (flow) direction is that vertical paper is outside;  represents that water (flow) direction is that vertical paper is inside;
Fig. 4 is the series system vertical view of coupling baffled reactor aerobic unit and anaerobic unit, and figure (a) is a rectangular parallelepiped formula reactor, and for saving the soil, figure (b) is the reactor of another kind of form.
Waste water is after entering reactor, at first in aerobic unit, by aeration effect and aerobic sludge thorough mixing, then by the up-flow section, overflow enters the downcomer of anaerobic unit, and with the flow through main body of anaerobic unit of the mode of up-flow, the mode by overflow flows into aerobic unit more afterwards.After the coupling of 3-5 aerobic unit-anaerobic unit of experience, behind outlet aeration zone and outlet settling tank, discharge outside the reactor like this.
Organism in the waste water is converted into CO in the metabolism of aerobic unit through aerobic sludge 2, H 2O and nitrate, the excess sludge of the organism that is not decomposed fully, nitrate and generation enters into anaerobic unit; In anaerobic unit, excess sludge carries out anaerobic digestion, is transformed into CO again 2And organism, CO 2Enter in the atmosphere, and organism enters the metabolism again of next aerobic unit.This technology can be implemented in when organism decomposes in the same reactor, nitrification and denitrification reacts and excess sludge is degraded carries out.
Embodiment:
Reactor volume is 20 liters, adopts poly (methyl methacrylate) plate to be bonded.Inner liquid level is 25cm, wide 8cm (interior dimensions), and long 100cm (interior dimensions), wherein the volume of each aerobic unit and anaerobic unit is 3.2L, and the volume ratio of ascent stage in the aerobic unit and aeration section is 1: 5; The ascent stage in the anaerobic zone and the volume ratio of downcomer are 5: 1; At reactor outlet one aeration zone is set and makes out water-soluble oxygen reach emission standard, a settling region is set simultaneously, be convenient to the mud production of the system of observing.This experiment,, is released in the mud dissolution process because phosphorus is absorbed by microorganism in metabolic process as mud dissolved index with total phosphorus, so can estimate the degraded situation of mud by surveying phosphorus; Collect water outlet in outlet simultaneously, measure average COD and SS in the water outlet, come the effect of assessing reactor organic removal and mud decrement by effluent quality.When the residence time of whole reactor is 15h, the COD of water inlet CrMean value was 650mg/L, and ammonia nitrogen is 45mg/L, showed the COD of water outlet through 400 days continuous running conditions CrAverage out to 50mg/L can reach 92% to organic removal, and the removal of total nitrogen can reach 45%, and suspended substance (SS) mean value is 80mg/L, and pH is about 7; The concentration of phosphorus shows the accumulation that does not have mud in the system with the concentration of phosphorus in the water inlet in the water outlet.Compare with traditional activated sludge process, can realize 50% mud decrement effect.

Claims (2)

1. a baffled reactor is characterized in that, this reactor is open rectangular parallelepiped, comprises being placed on rectangular intravital aerating apparatus, separation baffles, flow apron;
There is water-in the upper end of this rectangular parallelepiped one end, and the other end sets out the mouth of a river;
Rectangular parallelepiped is provided with some vertical separation baffles and flow apron along water (flow) direction;
The separation baffles bottom was connected with the end of rectangular parallelepiped, the height of separation baffles is lower than the height of rectangular parallelepiped and is equal with the water surface, with the corresponding independently unit of even number that is divided into of whole rectangular parallelepiped along continuous straight runs, make water flow into next unit through separation baffles from a unit in the overflow mode;
Remove outlet aeration unit and outlet precipitation unit, vertical flow apron is set in each unit, the upper end of flow apron is higher than the water surface, and the bottom can make water pass through, thereby makes water flow through each unit in the mode of baffling;
From feed-water end, the bottom aerating apparatus is set in odd location, aerobic unit is arranged in these unit; Even location is not provided with aerating apparatus, forms anaerobic unit, and anaerobic unit does not need sealing; Be the realization response device in appearance repeatedly along the anaerobic unit of aerobic unit that aerating apparatus is arranged on the water (flow) direction and no aerating apparatus;
This rectangular parallelepiped is setting gradually the outlet aeration unit and is exporting precipitation unit by two unit of water (flow) direction near exit end.
2. the method that a kind of baffled reactor according to claim 1 is disposed of sewage is characterized in that, this method may further comprise the steps:
(1) sewage enters Unit the 1st from water-in;
Aerating apparatus aeration in Unit (2) the 1st, sewage is handled under the effect of aerobic sludge, removes COD and nitrogen-containing pollutant in the decontaminated water; Sewage after the processing entered for the 1st unitary ascent stage under the effect of flow apron, because the gravity settling effect of mud, a part of mud is retained in Unit the 1st, and it is anaerobic unit that the water after another part mud and the processing enters Unit the 2nd;
(3) after sewage enters Unit the 2nd and is anaerobic unit, at first arrive the bottom of anaerobic unit, flow through ascent stage of anaerobic unit in the mode of up-flow then by downcomer; Because the effect of damming of anaerobic unit anaerobic sludge, aerobic sludge dams in anaerobic unit in the feasible water inlet, and anaerobic digestion takes place; It is aerobic unit that the product of sewage and anaerobic digestion enters Unit the 3rd;
(4) the 3rd unit repeating step (2) treating processess; Enter Unit the 4th, the treating processes of the 4th unit repeating step (3); The unit repeats the aerobic-anaerobic treating processes in step (2) and step (3) step repeatedly later on, up to effluent stream inlet/outlet aeration unit;
When the water process after (5) step (4) is handled exported aeration unit, the dissolved oxygen in the water obtained further replenishing, and reaches emission standard; The a small amount of suspended solids that contains in the water is further precipitation removal in the outlet precipitation unit;
(6) discharge reactor through the water after step (5) processing through water outlet.
Water has just obtained processing like this.
CNB2006100120704A 2006-05-31 2006-05-31 Baffle-board reactor and method for treating sewage by using it Expired - Fee Related CN100375724C (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103922476B (en) * 2014-05-13 2015-12-23 中国市政工程东北设计研究总院 A kind of sectional type A 2/ O activated sludge process reaction unit
CN106673301A (en) * 2016-12-16 2017-05-17 广州富生源环保工程有限公司 Intelligent vehicle-mounted intensive sewage treatment equipment

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JPH09103793A (en) * 1996-09-20 1997-04-22 Masunori Mori Septic tank
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CN2725287Y (en) * 2004-08-31 2005-09-14 湖南省爱普环境工程有限公司 Anaerobic deflecting plate reactor

Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
JPS6257697A (en) * 1985-09-04 1987-03-13 Meidensha Electric Mfg Co Ltd Waste water treatment device
JPH09103793A (en) * 1996-09-20 1997-04-22 Masunori Mori Septic tank
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