CN101962253A - Three-stage three-cycle anaerobic reactor - Google Patents
Three-stage three-cycle anaerobic reactor Download PDFInfo
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- CN101962253A CN101962253A CN2010105174425A CN201010517442A CN101962253A CN 101962253 A CN101962253 A CN 101962253A CN 2010105174425 A CN2010105174425 A CN 2010105174425A CN 201010517442 A CN201010517442 A CN 201010517442A CN 101962253 A CN101962253 A CN 101962253A
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Abstract
The invention discloses a three-stage three-cycle anaerobic reactor. The reactor consists of three independent units connected in series; each reaction unit is provided with a water inlet distributor at the bottom, a three-phase separator at the top and a reaction main body in the middle; anaerobic granular sludge is filled in the reaction unit; the top and the bottom of the reactor are externally connected with an outer circulating pump through a reflux pipe, and the reflux pipe is positioned on the lower part of the three-phase separator; and the water outlet pipe of the first-stage independent reaction unit is connected with and higher than the water inlet pipe of the second-stage independent reaction unit, and the water outlet pipe of the second-stage independent reaction unit is connected with and higher than the water inlet pipe of the third-stage independent reaction unit. The three-stage three-cycle anaerobic reactor does not need to adjust the pH of the inlet water, can improve the anaerobic bio-treatment efficiency, and has the characteristics of high efficiency, easy operation, easy expansion, capability of realizing full-automatic control and the like.
Description
Technical field
The present invention is a kind of anaerobic reactor that is used to handle as high density organic waste waters such as paper-making effluent, pharmacy waste waters.Belong to field of environment engineering technology.
Background technology
The pulping and paper-making industry always is the discharging rich and influential family of China's trade effluent and chemical oxygen demand (COD) (COD), is the key industry of carrying out disposal of pollutants control.According to statistics, 2008, the paper-making industrial waste water annual emissions was 4,900,000,000 tons, accounted for 17% of national industrial wastewater discharge total amount, and the COD quantity discharged accounts for 32% of national industrial wastewater discharge total amount, all occupied first of statistics industry.Developing rapidly of pulp and paper technology and equipment, slurrying water consumption drop to below 80 cubic metres from 220 cubic metres of/ton traditional slurries, and external advanced level reaches clear water consumption 10m especially
3Below/t the pulp.Therefore, though the total amount of industrial pollution caused by paper manufacturing discharging is reducing year by year, but the factory effluent concentration of discharging but raises day by day, with the chemimechanical pulp factory effluent is example, there is bigger difference in the CTMP/BCTMP contaminated wastewater feature of different assortments, because the widespread use of water saving measures, waste water COD concentration is generally all more than 4000mg/l, even high COD has reached more than the 8000mg/l, and the factory effluent fluctuation of concentration is bigger, the biodegradability of needlebush waste water is obviously poor than leaf wood, contains more difficult for biological degradation composition.Another typical chemimechanical pulp is APMP, and the waste strength that this technology produces is generally higher, and COD concentration generally all is higher than 6000mg/l, even up to more than the 1000mg/l.Waste water has the water temperature height, SS concentration is high and fluctuation is bigger, characteristics such as COD concentration height.
In the operational process of reality, reactor for treatment BCTMP waste water such as general at present employing UASB/IC/EGSB, volumetric loading is generally at 10-20kgCOD/m
3.d, the COD clearance is generally lower, only is about 45%-60%, particularly handles when containing the virose waste water of microorganism, as adding the residue (as sulfocompound, DTPA etc.) and the H of chemical agent in needle pulping wood leachable (as RFA etc.), slurrying and the bleaching process
2O
2Deng, the methanogen of anaerobic treatment process all there are in various degree inhibition or toxicity, cause the anaerobic treatment effect very poor, the production application practice shows that in a single day system for anaerobic treatment is subjected to severe inhibition, restarting to waste time and energy.The efficient that P-RC APMP anaerobic waste water is handled will be higher than the BCTMP waste water of similar assortment, adopts IC or EGSB reactor for treatment poplar P-RC APMP waste water, and general volumetric loading is at 20-30KgCOD/m
3D, COD clearance 55%-70%.
By top elaboration, can think that the chemical machinery pulp waste water when adopting existing anaerobism technology to handle, obtained certain effect, but also be prone to the problem that some are difficult to overcome.Discover, for CTMP/BCTMP waste water, because the chemical presoaking section has added sulfocompounds such as S-WAT in pulping process, there is stronger restraining effect in the existence of these materials to the anaerobe metabolism, particularly under the more and more higher background of current waste strength, the concentration of such inhibitory substance in waste water is also in corresponding increase, and the inhibition of anaerobic fermentation process also more is tending towards serious and obviously.Content is higher in the Resin Acid material that contains in the waste water in addition, particularly needlebush pulp-making waste-water, and often treatment effect is undesirable to adopt existing anaerobism technology.For P-RC APMP waste water, have COD concentration height, SS content height, easy characteristics such as acidifying, the surge capability of anaerobic reactor is required very high, be prone to that anaerobic device becomes sour or problem such as sludge loss, finally have influence on the steady running and the processing efficiency of reactor.
Angle analysis from reactor self, with widely used UASB, EGSB and IC reactor in recent years is example, and UASB is because engineering water inlet upflow velocity is little, and the swelling state of Sludge Bed is undesirable, be prone to problems such as short stream or channel, cause the muddy water mixed effect relatively poor; Suspended substance is accumulated in the reactor easily, thereby has reduced the content of effective active anaerobic sludge; During in the face of impact load, it is poor that toxicity suppresses tolerance, is prone to degradation situation under sludge loss, the effluent quality.EGSB has kept higher current upflow velocity (3m/h-10m/h) in whole reactor, when under higher load, handling high-concentration waste water, the large number of biological gas that produces makes at the flow velocity at triphase separator place quite high, in fluctuation of service, water inlet SS content is high or cause a large amount of anaerobic sludges to run off easily when impact load occurring, cause biomass minimizing in the system, influence the system handles effect, this is the most serious problem that EGSB occurs in actual application.IC structure of reactor complexity is made and the maintenance cost height, and inner circulating tube tends to occur phenomenon of blocking at operational process, thereby have influence on the effect of internal recycle, VFA to water inlet requires control strictness etc., all influences the treatment effect of waste water to a certain extent, thereby has limited its range of application.
In sum, the variety of problems that shows at anaerobic reactor, existence as inhibitory substance, VFA requires problems such as height to water inlet, mainly be relatively more responsive to survival environmental conditions because produce methane, UASB, EGSB and IC reactor are the single type reactor, each quasi-microorganism Room that coexists, after waste water enters reactor, the existence of inhibitory substance at first has a negative impact to the methanogen quasi-microorganism, handle the ability drop of VFA class material, the microorganism growth of the different substrates of degraded begins imbalance to occur in the same reactor, is prone to the accumulation of VFA, and the accumulation of VFA class material, the decline meeting of pH further influences the metabolism of methanogen quasi-microorganism, finally causes becoming sour of reactor.As seen, finish whole contaminant degradation process by single full mixed type anaerobic reactor, processing power that must the sacrificial section microorganism is a cost.
Summary of the invention
Purpose of the present invention is exactly in order to remedy above-mentioned deficiency, a kind of three stages three circulation anaerobic reactors are provided, be applicable to handle and contain difficult degradation composition waste water, particularly at as high consistency pulping paper waste or pharmacy waste water etc., realize pre-treatment and biological treatment combination, reach high-level efficiency, high load, the strong and good stabilizing treatment effluent quality of anti impulsion load ability handled.
Technical scheme of the present invention is: a kind of three stages three circulation anaerobic reactors, reactor is composed in series by three separate units, the bottom of each reaction member is provided with the into triphase separator of water divider and top, the middle part is a reactive agent, in be filled with anaerobic grain sludge, reactor head and bottom are by the external outer circulation pump of return line, and return line is positioned at the bottom of triphase separator;
The unitary rising pipe of one-level independent reaction is connected with the unitary water inlet pipe of secondary independent reaction and is higher than the unitary water inlet pipe of secondary independent reaction, and the unitary rising pipe of secondary independent reaction is connected and is higher than three grades of unitary water inlet pipes of independent reaction with three grades of unitary water inlet pipes of independent reaction.
The unitary volume of I order reaction: the unitary volume of II order reaction: III order reaction unit volume is 1: (1～3): (2～4).
The unitary anaerobic grain sludge concentration of I order reaction is at 10～40g/l, and II order reaction unit anaerobic grain sludge concentration is at 15～50g/l, and the unitary anaerobic grain sludge concentration of III order reaction is at 15～50g/l.
Beneficial effect:
1. reactor has good system buffer ability, and is low to pH, the VFA requirement of water inlet.In pH 6-8 scope, can be uncomfortable anaerobic water inlet pH, thereby significantly reduce alkaline consumption in the actual production, can obviously reduce the running cost of water treatment.
2. after the reactor classification, efficient improves, and the cumulative volume of reactor can be less than present reactor volume, and the volume of each single reactor is also reduced.Therefore, not only laid down cost is lower, and helps the water distribution of reactor.
3. the plug-flow fluidised form on the reactor monolith, cause of the variation of envrionment conditionss such as organic concentration and pH along water (flow) direction, corresponding selection and change have also taken place in the microorganism dominant population in the differential responses unit, thereby have produced the biophase separation, have embodied the material transfer between each level microbe.Each stage reactor shows different separately operating performancies, and I order reaction unit has the acidication effect, and there is the conversion process between the organism in II order reaction unit, and III order reaction unit has mainly carried out product methane process.This makes three stages three circulation anaerobic reactors can keep dissimilar microorganism activies on the whole, realizes the higher organic matter degradation usefulness and the stability of operation.
Description of drawings
Fig. 1 is one of structural representation of the embodiment of the invention.
Fig. 2 be the embodiment of the invention structural representation two.
1, water inlet divider; 2, reactive agent; 3, return line; 4, outer circulation pump; 5, triphase separator; 6, collecting methane pipe; 7, rising pipe.
Embodiment
Further specify various embodiments of the present invention and working process thereof below in conjunction with accompanying drawing.
A kind of three stages three circulation anaerobic reactors, reactor is composed in series by three separate units, the bottom of each reaction member is provided with the into triphase separator 5 of water divider 1 and top, the middle part is a reactive agent 2, in be filled with anaerobic grain sludge, the upflow velocity of reactor can be regulated by return line 3 external outer circulation pumps 4 in reactor head and bottom.Return line 3 is positioned at the bottom of triphase separator 5.
The unitary rising pipe of one-level independent reaction is connected with the unitary water inlet pipe of secondary independent reaction and is higher than the unitary water inlet pipe of secondary independent reaction, and the unitary rising pipe of secondary independent reaction is connected and is higher than three grades of unitary water inlet pipes of independent reaction with three grades of unitary water inlet pipes of independent reaction.
The unitary volume of I order reaction: the unitary volume of II order reaction: III order reaction unit volume is 1: (1～3): (2～4).
The unitary anaerobic grain sludge concentration of I order reaction is at 10～40g/l, and II order reaction unit anaerobic grain sludge concentration is at 15～50g/l, and the unitary anaerobic grain sludge concentration of III order reaction is at 15～50g/l.
Three stages three circulation anaerobic reactors of the present invention are combined by three anaerobic reaction unit, and each reaction member all has water-distributing device, reflux and triphase separator.Form the waterpower fluidised form of the local mixed flow of whole plug-flow on the water (flow) direction, waste water is from the unitary bottom water inlet of I order reaction, from the water outlet behind triphase separator of the unitary top of I order reaction; And can further strengthen muddy water by the outer circulation pump and mix according to practical operation situation, improve mass transfer effect.Water outlet after the processing enters II order reaction unit by the unitary bottom of II order reaction, by regulating the unitary reflux ratio of II order reaction, improve the metabolism transmission between organic pollutant in granule sludge and the waste water, in like manner, handle the back water outlet and enter III order reaction unit by III order reaction unit bottom and handle the water outlet handled well at last, finish treating processes from the unitary top of III order reaction outflow reactor.
The working process of reactor is as follows: waste water evenly enters by the water inlet divider 1 of being located at I order reaction unit bottom in the reactive agent 2 at I order reaction unit I middle part through intake pump, contact with the anaerobic sludge thorough mixing in being filled in I order reaction unit process main body 2, partial organic substances is degraded by microorganisms and produces biogas in the waste water, part macromole class mass degradation forms small molecules class material, produce hydrolysis effect, waste water after treatment separates the back enters II order reaction unit II by rising pipe 7 gravity flows bottom by the triphase separator 5 at top, I order reaction unit, biogas enters the biogas cabinet by collecting methane pipe 6, by top and the return line 3 of bottom and the reflux ratio in the 4 conditioned reaction unit of the outer circulation pump on the return line 3 of ligation main body 2.The water that is come out by I level independent reaction unit rising pipe 7 enters II level independent reaction unit bottom, water inlet divider 1 by II order reaction unit bottom enters in the reactive agent 2 at middle part, II order reaction unit with wherein anaerobic grain sludges and carries out further biochemical degradation reaction, and then after triphase separator 5 separation by the top, mud is got back in the II order reaction unit, waste water after the processing is after rising pipe 7 outflows at top, from flowing into III order reaction unit III bottom, three reaction members all can be regulated the upflow velocity of waste water by return line 3 and 4 outer circulations of outer circulation pump, reach the purpose of improving the muddy water mixed effect, the biogas that reaction members at different levels produce is sent the biogas cabinet by the collecting methane pipe 6 at top, carries out energy utilization.
Can adopt mode shown in Figure 1, I level independent reaction unit is located on the II level independent reaction unit, the unitary water outlet of II level independent reaction is re-used as the unitary water inlet of III level independent reaction then, be located at the valve regulated flooding quantity on the outer return line of reaction members at different levels, thereby improve flooding velocity, improve the muddy water mixed effect.Also can be as shown in Figure 2, with I, II, III level independent reaction unit series combination from top to bottom, the water inlet pipe type of attachment of the rising pipe of previous stage and back one-level.
Adopt the treatment effect of this reactor for treatment poplar P-RC APMP waste water to be shown in Table 1.The volumetric loading of taking is 25KgCOD/m
3.d.
Claims (3)
1. stages three circulation anaerobic reactor, it is characterized in that, reactor is composed in series by three separate units, the bottom of each reaction member is provided with the into triphase separator (5) of water divider (1) and top, the middle part is reactive agent (2), in be filled with anaerobic grain sludge, reactor head and bottom are by the external outer circulation pump of return line (3) (4), return line (3) is positioned at the bottom of triphase separator (5);
The unitary rising pipe of one-level independent reaction is connected with the unitary water inlet pipe of secondary independent reaction and is higher than the unitary water inlet pipe of secondary independent reaction, and the unitary rising pipe of secondary independent reaction is connected and is higher than three grades of unitary water inlet pipes of independent reaction with three grades of unitary water inlet pipes of independent reaction.
2. three stages three circulation anaerobic reactors according to claim 1, it is characterized in that the unitary volume of I order reaction: the unitary volume of II order reaction: III order reaction unit volume is 1: (1～3): (2～4).
3. three stages three circulation anaerobic reactors according to claim 1, it is characterized in that, the unitary anaerobic grain sludge concentration of I order reaction is at 10～40g/l, II order reaction unit anaerobic grain sludge concentration is at 15～50g/l, and the unitary anaerobic grain sludge concentration of III order reaction is at 15～50g/l.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102139955A (en) * | 2011-04-12 | 2011-08-03 | 山东建筑大学 | Multistage recirculation reactor for anaerobic sludge |
| CN102583726A (en) * | 2012-01-13 | 2012-07-18 | 丁晓亮 | Multistage anaerobic reaction device and method for preparing methane by utilizing same |
| CN107265632A (en) * | 2017-07-13 | 2017-10-20 | 浙江科技学院 | Two-phase integrated breeding can be combined and adds discarded object mixed material anaerobic reactor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1785844A (en) * | 2005-12-15 | 2006-06-14 | 南京大学 | Biological anaerobic reactor of textile printing dyeing waste water |
| CN1907886A (en) * | 2006-08-09 | 2007-02-07 | 江南大学 | Waste water treatment apparatus for generating firedamp and self-circulating anaerobic reactor thereby |
| CN1962485A (en) * | 2006-11-23 | 2007-05-16 | 上海应用技术学院 | Column type anaerobic reactor |
| CN101130747A (en) * | 2007-08-17 | 2008-02-27 | 浙江大学 | Technology for methanation processing consumer waste step by step and bioreactor |
-
2010
- 2010-10-22 CN CN2010105174425A patent/CN101962253A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1785844A (en) * | 2005-12-15 | 2006-06-14 | 南京大学 | Biological anaerobic reactor of textile printing dyeing waste water |
| CN1907886A (en) * | 2006-08-09 | 2007-02-07 | 江南大学 | Waste water treatment apparatus for generating firedamp and self-circulating anaerobic reactor thereby |
| CN1962485A (en) * | 2006-11-23 | 2007-05-16 | 上海应用技术学院 | Column type anaerobic reactor |
| CN101130747A (en) * | 2007-08-17 | 2008-02-27 | 浙江大学 | Technology for methanation processing consumer waste step by step and bioreactor |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102139955A (en) * | 2011-04-12 | 2011-08-03 | 山东建筑大学 | Multistage recirculation reactor for anaerobic sludge |
| CN102139955B (en) * | 2011-04-12 | 2012-08-29 | 山东建筑大学 | Multistage recirculation reactor for anaerobic sludge |
| CN102583726A (en) * | 2012-01-13 | 2012-07-18 | 丁晓亮 | Multistage anaerobic reaction device and method for preparing methane by utilizing same |
| CN107265632A (en) * | 2017-07-13 | 2017-10-20 | 浙江科技学院 | Two-phase integrated breeding can be combined and adds discarded object mixed material anaerobic reactor |
| CN107265632B (en) * | 2017-07-13 | 2023-07-07 | 浙江科技学院 | Combined two-phase integrated anaerobic reactor for raising waste mixed raw materials |
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Application publication date: 20110202 |