CN105858883A - Quick start method for low-concentration anaerobic reactor - Google Patents

Quick start method for low-concentration anaerobic reactor Download PDF

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Publication number
CN105858883A
CN105858883A CN201610394147.2A CN201610394147A CN105858883A CN 105858883 A CN105858883 A CN 105858883A CN 201610394147 A CN201610394147 A CN 201610394147A CN 105858883 A CN105858883 A CN 105858883A
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activated carbon
anaerobic
reactor
concentration
powdered activated
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CN105858883B (en
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宋铁红
王晓玲
韩相奎
康春玉
李紫棋
余勇
张晓旭
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Jilin Jianzhu University
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Jilin Jianzhu University
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/28Anaerobic digestion processes

Abstract

The invention discloses a quick start method for a low-concentration anaerobic reactor. A folded plate anaerobic reactor device is started by adding powdered activated carbon at the temperature of 24 DEG C in a natural biofilm formation mode, the biofilm formation speed is high, the adaptive capacity of an anaerobic biofilm to the environment in the reactor is high, no disengagement is likely to happen when the water quality condition is changed, and high anti-load-impact capacity is achieved.

Description

A kind of low concentration anaerobic reactor quick start method
Technical field
The present invention relates to water treatment field, be specifically related to a kind of low concentration anaerobic reactor quick start method.
Background technology
Anaerobic reactor startup refers under certain conditions, makes anaerobe breed, and is formed by various micro- The mud body that biotic population assembles, reaches stable degradation efficiency.The startup of reactor is stable operation Premise, can be divided into from inoculating startup, granule sludge startup and other sludge seedings three kinds of modes of startup.Detest Oxygen reactor needs 60d in the starting period when temperature is 30 DEG C;80d is needed when temperature is 20 DEG C. Owing to anaerobic bacteria propagation is relatively slow, and most anaerobe is coccus and bacillus, is difficult to apposition growth, easily With water outlet outflow reactor, if creating the condition being conducive to filamentous bacteria to increase, filamentous bacteria gets final product fast-growth also Attachment forms netted mechanism, and the growth for other microorganisms provides habitat.
In conventional anaerobic reaction device start-up course, the Starting mode used is a lot.Use the most by force The mode of aerobic precoating treatment start to accelerate anaerobic reactor, but be the increase in power-equipment.Or use Aerobic activated sludge inoculation membrane formation, this biofilm mode is to the startup also ratio of reactor comparatively fast.But starting During impact resistance little and inoculated biomembrane also has one in reaction unit and changes kind of a process, work as water Matter condition varies slightly biomembrane and is easy to come off.
Summary of the invention
For solving the problems referred to above, the invention provides a kind of low concentration anaerobic reactor quick start method, adopt It is used in and adds the mode of Powdered Activated Carbon natural membrane under the conditions of 24 DEG C and carry out flap anaerobic reactor device Starting, biofilm speed degree is fast, and Anaerobe film is strong to the adaptive capacity to environment in reactor, works as condition of water quality Difficult drop-off when changing, has stronger anti-load impact ability.
For achieving the above object, the technical scheme that the present invention takes is:
A kind of low concentration anaerobic reactor quick start method, adds Powdered Activated Carbon certainly under the conditions of 24 DEG C So the mode of biofilm carries out the startup of flap anaerobic reactor device, concretely comprises the following steps:
S1, the initial stage started at reaction unit, inoculate anaerobic sludge, and it is anti-to anaerobism to add Powdered Activated Carbon Answering 1/2nd positions of device volume, start to start after mixing quiet heavy 2d, inlet COD concentration is 1000-1500mg/L, with natrium carbonicum calcinatum regulation water inlet pH value, makes to control at 7.5-8.5 into water pH value Between, and add inorganic salts class nutritional labeling, natural membrane 1 week;
S2, within the starting period, the running temperature of reactor controls at 24 DEG C, when just starting, keep relatively High inlet COD concentration and volumetric loading, then, by hydraulic load progressively from initial 2.26m3/m3d Bring up to 5.30m3/m3D, and be 24h, 20h, 16h, 12h by corresponding hydraulic detention time;Start to open Dynamic initial 7d, does not puts activated-carbon device COD clearance and is below 50%, place the COD of activated-carbon device Clearance is 53.23%.This shows that it is the most aobvious that activated carbon intensifying device starts effect in the initial stage started Write.
S3, run 2 weeks after, control VFA in reaction unit by regulation hydraulic detention time Content, hydraulic detention time at least runs 6d and COD from 12h, 10h, 8h, 6h, system by each HRT Clearance is stablized the adjustable principle in side more than 55% and is carried out the startup optimization of assay device, uses this to open The purpose of flowing mode is to be unlikely to, during domestication seed sludge, the intrasystem microbial biomass that falls sharply, And strengthen its anti-load impact ability, during natural membrane, keep temperature of reactor be in 24 ± 2.0℃;
S4, run 1 week after, conveying end seed sludge mixed liquor 3L, poured into instead by each compartment top respectively Answer each compartment of device;Anaerobic sludge sinks under gravity, is intercepted by Powdered Activated Carbon in sinking watching, Black dirt flco overworks activated carbon in compartment space;Intake with normal discharge subsequently.
S5, being gradually lowered COD concentration to the sewage disposal concentration needed, every time change COD concentration is run 5 day time.Research finds, places activated-carbon device COD clearance and improves speed, thereafter HRT During regulation, organic removal ability of anaerobic device is kept at higher level.Relative analysis result table Bright, add particle diameter and more than 83 μm and be less than the device COD clearance decrease speed of 20 μm activated carbons relatively Hurry up, notable when being especially down to 4h with HRT.And add the anaerobic device COD that particle diameter is 20~83 μm activated carbons Average removal rate still can maintain more than 64%.
The method have the advantages that
The mode adding Powdered Activated Carbon natural membrane under the conditions of 24 DEG C is used to carry out low concentration anaerobic reaction The startup of device device, biofilm speed degree is fast, and Anaerobe film is strong to the adaptive capacity to environment in reactor, when Difficult drop-off when condition of water quality changes, has stronger anti-load impact ability.
Detailed description of the invention
In order to make objects and advantages of the present invention clearer, below in conjunction with embodiment, the present invention is carried out Further describe.Should be appreciated that specific embodiment described herein only in order to explain the present invention, It is not intended to limit the present invention.
Embodiments provide a kind of low concentration anaerobic reactor quick start method, 24 DEG C of conditions Under add the mode of Powdered Activated Carbon natural membrane and carry out the startup of flap anaerobic reactor device,
Concrete, comprise the steps:
1) for the feature of process low-concentration organic waste water, within the starting period, the running temperature control of reactor System is at 24 DEG C, for improving sludge concentration in reactor as early as possible, it is ensured that the startup success of reactor, when just starting, Keep higher inlet COD concentration and volumetric loading, COD clearance to be achieved stably after, then use by Step strengthens the method for hydraulic load and improves volumetric loading.Hydraulic load is from initial 2.26m3/m3D brings up to 5.30m3/m3D, i.e. corresponding hydraulic detention time is reduced to 12h from 24h.
2) at the initial stage started at reaction unit, initially set up: add Powdered Activated Carbon and hold to anaerobic reactor / 2nd long-pending positions.Inlet COD concentration is about 1000-1500mg/L, with natrium carbonicum calcinatum regulate into Water pH value, makes to control between 7.5-8.5 into water pH value, and hydraulic detention time HRT is 24h, and adds Enter the inorganic salts class nutritional labelings such as calcium chloride, ferric chloride, magnesium sulfate, potassium dihydrogen phosphate, in order to promote The growth of methane backeria and improve this test of sludge activity the most suitably add in sludge acclimatization calcic, magnesium, ferrum, The salt of the trace element such as cobalt, nickel.
3) through the time of 15 days, observe and find to have overworked anaerobism filamentous bacteria, in breast on Powdered Activated Carbon White.Owing to anaerobe is hardly produced, HRT answers long enough, and at water inlet pH value, COD concentration is certain In the case of, in control reaction unit, the Main Means of pH value is regulation HRT.Controlled by regulation HRT VFA content in reaction unit, provides good living environment for microbial growth.In seeded process, In the range of keeping temperature of reactor to be in 24 ± 2.0 DEG C, the propagation of microorganism is made to be in optimal environment shape State.
4) for strengthening anaerobic sludge concentration, after shelving six days, above-mentioned seed sludge mixed liquor 3L is taken, respectively Each compartment of reactor is poured into by each compartment top.Anaerobic sludge sinks under gravity, in sinking watching Being intercepted by Powdered Activated Carbon, black dirt flco overworks filler in compartment space.Subsequently with 220mL/min Flow is intake, i.e. HRT24h.After three days, in anaerobic reactor, on Powdered Activated Carbon, mud starts whiting, There is partial exfoliation mud bottom, in black.Hereafter, biological wadding is hung in anaerobic reactor on Powdered Activated Carbon Body is gradually transformed into milky acidifying bacterium from top to bottom, and this trend substantially weakens, and reactor bottom has one layer The black floc sludge come off, goes out clarification of water.
5), after three days, anaerobic reactor influent COD about 1000-1500mg/L, hydraulic detention time are kept Control respectively at 24h, 20h, 16h, 12h.Run 7 days under each hydraulic detention time.Start training The process supporting Anaerobe film is also the domestication process of anaerobe.The most hyphomycetic growth and breeding and Quickly fixing on Powdered Activated Carbon, the beneficially apposition growth of anaerobe.According to evolutional viewpoint, raw Thing is in long-term evolutionary process, and survival of the fittest, discomfort person eliminate.It is big that filamentous microorganism has specific surface area, One end set, nutrition and aerobic require that low, metabolic rate is fast, rete malpighii can reduce the features such as flow resistance, Adapting to very much the feature of current water, therefore in water treatment building, Powdered Activated Carbon can not only be good Become the carrier of anaerobe, and by the absorbability energy active adsorption sewage of its huge surface area Organic substance, thus with adhered to microorganism thereon later and cooperatively completed the purification of sewage.Therefore Powdered Activated Carbon effect in terms of biofilm structure forms and improve low concentration wastewater treatment effeciency is very Important.
6) for adapting to start the demand of low concentration anaerobic reactor, COD concentration can be gradually lowered to needs Sewage disposal concentration, the suggestion of each transition time is for running five days.
The initial stage that reaction unit starts, microorganism is most difficult to generate, and natural membrane is also most difficult to, and applicant thinks HRT answers long enough.To this end, initially HRT is 24h, inlet COD concentration is about 1200mg/L, uses hydrogen-oxygen Change sodium and natrium carbonicum calcinatum regulation water inlet pH value, make into water pH value between 7.5-8.5.Through two weeks Left and right, Powdered Activated Carbon has overworked cotton-shaped acidifying bacterium, has been creamy white.Anaerobic reactor after measured PH value is 5.2-5.9.The thinnest along reaction unit water (flow) direction biomembrane the most backward, anaerobic reactor is the most each Room simply sporadicly hangs with some acidifying bacterium, draws after measured from the 5th Room pH value backward below 4.8.Warp Relative analysis, applicant thinks that pH value has been unfavorable for Powdered Activated Carbon biofilm below 4.8.
During natural membrane, when water inlet pH value, in the case of COD concentration is certain, controls flap and detest In oxygen reaction unit, the Main Means of pH value is regulation HRT.Efficient flap anaerobism is controlled by regulation HRT VFA content in reaction unit, provides good living environment for microbial growth.For finding out that nature is hung The optimal HRT in each stage in membrane process, the pH value of every room and the pH value of water outlet are measured by applicant. Initially HRT is 12h, and water outlet pH value have dropped about 1.7;When natural membrane film runs 15 days, record The pH value of rear five Room is all below 4.8;Being understood pH value by upper piecewise analysis is not that microorganism is raw below 4.8 Long optimal pH scope, so applicant is adjusted to 8h HRT.One is run under the conditions of HRT is 8h In week, flap anaerobic reaction device pH value more than 5.5, is then adjusted to 8h HRT, records water outlet pH Value is about 5.2, and pH environment is relatively suitable for growth of microorganism.Run one week under the conditions of HRT is 8h, The Anaerobe film of reaction unit front end has been filled with the space of Powdered Activated Carbon, in grey black, after End has hung up Anaerobe film, but the thinnest.Now, the powder on flap anaerobism lab scale reaction unit top Biofilm biomass on the activated carbon of end is substantially many than bottom.This is because the reoxygenation on top so that aerobic, facultative Antibacterial is grown, and growth and breeding aerobic, facultative bacteria is faster than the anaerobic bacteria of bottom, so powder is lived The biological thickness on property charcoal top.The most again through 1 month, Powdered Activated Carbon top finds substantial amounts of protozoacide, Protozoacide is based on paramecium.Reaction unit front end, middle-end protozoacide quantity are substantially many than rear end.Carefully Bacterium is based on bacillus.Spend again 1 month, find substantial amounts of metazoa, metazoa with the Lumbricus that quivers, nematicide, Wheel animalcule is main.1-3 room, reaction unit front end, protozoacide is in the majority, and metazoa is fewer;4-5 room with Metazoa is in the majority, and along journey backward, nematicide and the Lumbricus that quivers are the most, and paramecium and wheel animalcule are the fewest, close to water outlet Place only finds nematicide and the Lumbricus that quivers.A large amount of protozoacidies and metazoal occur indicating flap anaerobic reaction The biomembrane of device has cultivated maturation.Powdered Activated Carbon bottom does not find protozoacide and metazoa, Based on milky acidifying bacterium.Now, can be considered that flap anaerobic reactor device starts successfully.
For finding out that pilot scale under the same terms, lab scale anaerobic device run the difference of effect, and corrected, with The conclusion making these research trends relative analysis different-grain diameter activated carbon reinforced anaerobic device effect is the most accurate, draws Enter the result of the test under the conditions of early stage does not adds activated carbon.Result shows, does not adds activated carbon, other Part is identical, and anaerobic device continuous startup optimization 88d, respective HRT is all stable at 8h.Anaerobic device respectively every The room success of biofilm the most, therefore can be considered and start successfully.Analyze by contrast and understand, under the conditions of different HRT, two There is significant difference in each corresponding COD clearance of device, the anaerobic device adding activated carbon starts The sludge character change occurred after 50d shows that anaerobe group and structure more they tend to rationally in system.
As seen from the experiment, stablizing HRT8h when running 17d continuously, COD, TP of anaerobic device removes Rate and high specific methane production rate are the most relatively stable, without significantly increasing or reduction trend.And anaerobic device opens Move to compartment each during stable operation and the most hung up biomembrane, therefore visually add activated carbon anaerobic device and run continuously 50d can start successfully.And the anaerobic device not adding activated carbon need to start 78d continuously and can start successfully, And organic removal ability is relatively low.From relative analysis result, different setback plate anaerobic device is started by activated carbon The invigoration effect running effect is the most notable.3 kinds of particle diameter activated carbons are less than the follow-up operation knot of 8h at HRT Fruit shows, the flyash particle diameter strengthening different setback plate anaerobic device optimal efficacy is 20-83 μm.
Activated carbon has that porosity is high, specific surface area big, the ratio feature such as great, and these physical characteristics are shortening Composite anaerobic has played extremely important effect in the reaction unit startup time.Conventional achievement in research and warp Test and show, the physical absorption ability of any adsorbent and its specific surface area, porosity correlation, therefore Activated carbon necessarily has stronger physical absorption ability.Initial start stage activated carbon surface is a large amount of owing to having adsorbed The various nutrient substance that need of Institute of Micro-biology and become the settlement of anaerobe, and then formed a large amount of Zoogloea.
The overlong time of anaerobic reactor startup optimization.Low concentration sewage bar is processed for accelerating reaction unit Startup under part, desirable a certain amount of Powdered Activated Carbon mixing anaerobic mud is as the seed sludge of this reactor. Having that specific surface area is big, porosity is high based on Powdered Activated Carbon and than the feature such as great, the application thinks utilization These physical propertys of Powdered Activated Carbon can make anaerobic reaction device start successfully and be within a short period of time Efficient stable state.Trace it to its cause two:
1) specific surface area is big and the high high physical absorption ability formed of porosity will add bacterium glue in speed system The formation of group;
2) formed zoogloea is necessarily made to have good settleability than great, so that device started Efficient stable in journey.
Based on above-mentioned viewpoint, after this patent design anaerobic sludge is mixed homogeneously by a certain percentage with Powdered Activated Carbon As seed sludge, to quickly starting anaerobic reaction device under low consistency conditions.
The above is only the preferred embodiment of the present invention, it is noted that common for the art For technical staff, under the premise without departing from the principles of the invention, it is also possible to make some improvements and modifications, These improvements and modifications also should be regarded as protection scope of the present invention.

Claims (1)

1. a low concentration anaerobic reactor quick start method, it is characterised in that throw under the conditions of 24 DEG C The mode adding Powdered Activated Carbon natural membrane carries out the startup of flap anaerobic reactor device, concretely comprises the following steps:
S1, the initial stage started at reaction unit, inoculate anaerobic sludge, and it is anti-to anaerobism to add Powdered Activated Carbon Answering 1/2nd positions of device volume, start to start after mixing quiet heavy 2d, inlet COD concentration is 1000-1500mg/L, with natrium carbonicum calcinatum regulation water inlet pH value, makes to control at 7.5-8.5 into water pH value Between, and add inorganic salts class nutritional labeling, natural membrane 1 week;
S2, within the starting period, the running temperature of reactor controls at 24 DEG C, when just starting, keep relatively High inlet COD concentration and volumetric loading, then, by hydraulic load progressively from initial 2.26m3/m3d Bring up to 5.30m3/m3D, and be 24h, 20h, 16h, 12h by corresponding hydraulic detention time;
S3, run 2 weeks after, control VFA in reaction unit by regulation hydraulic detention time Content, hydraulic detention time is 12h, 10h, 8h, 6h, and system at least runs 6d and COD by each HRT Clearance is stablized the adjustable principle in side more than 55% and is carried out the startup optimization of assay device, and at natural extension In membrane process, temperature of reactor is kept to be in 24 ± 2.0 DEG C;
S4, run 1 week after, conveying end seed sludge mixed liquor 3L, poured into instead by each compartment top respectively Answer each compartment of device;Anaerobic sludge sinks under gravity, is intercepted by Powdered Activated Carbon in sinking watching, Black dirt flco overworks activated carbon in compartment space;Intake with normal discharge subsequently.
S5, being gradually lowered COD concentration to the sewage disposal concentration needed, every time change COD concentration is run 5 day time.
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CN109534498A (en) * 2018-12-29 2019-03-29 江苏索普(集团)有限公司 A kind of biochemical treatment is organic to contain SO4 containing acid2-The processing method of waste water

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