CN108341571A - The single step heating startup method of sludge high temperature anaerobic digestion reaction - Google Patents
The single step heating startup method of sludge high temperature anaerobic digestion reaction Download PDFInfo
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- CN108341571A CN108341571A CN201810090709.3A CN201810090709A CN108341571A CN 108341571 A CN108341571 A CN 108341571A CN 201810090709 A CN201810090709 A CN 201810090709A CN 108341571 A CN108341571 A CN 108341571A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
- C02F11/04—Anaerobic treatment; Production of methane by such processes
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Abstract
The present invention provides a kind of single step heating startup methods of sludge high temperature anaerobic digestion reaction comprising following steps：After former mud is quickly heated up to 35 DEG C under anaerobic, it is inoculated with mesophilic anaerobic digestion kind mud, mixing；The combination medicament of Biostimulation agent and buffer is added, single step is warming up to 55 DEG C, after lasting stirring, completes the startup of sludge high temperature anaerobic digestion reaction.Compared with prior art, the present invention has following advantageous effect：1, the present invention can substantially shorten the sludge high temperature anaerobic digestion single step heating Primary culture period, significantly improve starting efficiency and be allowed to Effec-tive Function, can shorten 30 days or more compared to the traditional approach startup period；2, present invention process is simple, cost of investment is low, condition is not harsh, for promoting the popularization and application of sludge high temperature anaerobic digestion techniques to have certain practice significance.
Description
Technical field
The invention belongs to field of solid waste treating technology, are related to a kind of promotion sludge high temperature anaerobic digestion single step liter
The method of startup temperature.
Background technology
With the development of economic society and the growth of population, China's urban wastewater treatment amount constantly increases.Firmly build portion's data
It has been shown that, in by the end of September, 2016 by, average daily sewage load reaches 1.70 billion cubic meters；As the by-product of Sewage Biological Treatment,
Sludge yield also increasingly increases, and how to be effectively treated becomes the problem faced in environmental improvement with disposition flood tide sludge.At present
Treatment of Sludge includes mainly that the biological treatments such as aerobic, anaerobism and physics and method of chemical treatment, anaerobic sludge digestion have benefited from
While realizing sludge stabilizing and minimizing, additionally it is possible to generate biomass energy methane and hydrogen, acquisition is studied and answered extensively
With.
Anaerobic digestion reaction is cooperated by complicated microorganism species to be completed, including hydrolysis acidification flora, hydrogen-producing acetogens
Group and methanogen floras.By a variety of such environmental effects, digestion temperature will also influence its activity as one of great influence factor
Microbial bacteria group structure.Due to the presence of two kinds of methanogen floras, anaerobic digestion mainly use mesophilic digestion (35 DEG C or so) and
Thermophilic digestion (55 DEG C or so).Compared to mesophilic digestion, although thermophilic digestion needs more high energy consumption, corresponding biomass energy output
More and sterilization effect more preferably [De la Rubia M A, Riau V, Raposo F, et al.Thermophilic
anaerobic digestion of sewage sludge:focus on the influence of the start-up.A
review[J].Critical reviews in biotechnology,2013,33(4):448-460].In engineering practice, by
It in lacking a large amount of thermophilic digestion kind mud, needs to tame mesophilic digestion kind mud, realizes the startup of sludge high temperature anaerobic digestion.
The quick startup of sludge high temperature anaerobic digestion at this stage includes mainly that single step heating startup starts with gradually temperature lifting type,
In improving temperature incubation, thermophilic digestion Bacterial community system is established.The transformation of cultivation temperature, be sludge system in itself
Bacterial community adjustment brings selection pressure, and range of temperature is bigger, and corresponding selection pressure is stronger, thus single step heating is opened
It is dynamic often to destroy sludge itself system bacterial metabolism balance, lead to occur volatile fatty acid and hydrogen gas accumulation in system, even
Cause system crash [Tian Z, Zhang Y, Li Y, et al.Rapid establishment of thermophilic
anaerobic microbial community during the one-step startup of thermophilic
anaerobic digestion from a mesophilic digester[J].Water research,2015,69:9-
19].System is impacted in order to mitigate temperature transition, sludge high temperature anaerobic digestion starts frequently with gradually temperature lifting type, but this side
Time-consuming for formula, usually at two months or more, causes treatment effeciency not high.
Invention content
For deficiency existing for above-mentioned sludge high temperature anaerobic digestion start-up course, providing one kind can effectively shorten the present invention
Start the combination medicament in period.Combination medicament can promote granular sludge and methanogen using appropriate particle size iron powder
Methanosarcina becomes the advantage of dominant microflora, realizes microorganism species metabolic balance, while passing through NaHCO3Maintain body
It is cushion performance, attachment base is provided for microorganism by bio-carrier, realizes the fast-growth breeding of thermophilic high temperature methanogen floras.
The present invention is achieved by the following technical solutions：
The present invention provides a kind of single step heating startup methods of sludge high temperature anaerobic digestion reaction comprising following step
Suddenly：
After former mud is heated to 35 DEG C with the heating rate of 3~5 DEG C/min under anaerobic, it is inoculated with mesophilic anaerobic digestion
Kind mud, mixing；
The combination medicament containing Biostimulation agent and buffer is added, single step is warming up to 55 DEG C, after lasting stirring, completes
The startup of sludge high temperature anaerobic digestion reaction.
Preferably, the former mud is municipal sludge.
Preferably, the mesophilic anaerobic digestion kind mud comes from anaeration in normal temperature reactor, and viable bacteria number is more than 108
A/mL, solid content are 20~40g/L, and preferably 30g/L, inoculum concentration is the 8~20% of former mud volume, preferably 12.5%.
Preferably, the dosage of the Biostimulation agent is that every liter of former mud adds 1~20g, preferably 10g/L.
Preferably, the Biostimulation agent is iron powder, and the grain size of the iron powder is 0.015~0.425mm, preferably
For 0.15mm.
Preferably, the dosage of the buffer is that every liter of former mud adds 600~1800mg, preferably
1200mg。
Preferably, bio-carrier is also contained in the combination medicament, the bio-carrier includes polyurethane resin
Class carrier.
Preferably, the filling rate of the bio-carrier is 5~20%, which is using mixed soil volume as base
Accurate, mixed soil refers to the mixture of former mud, mesophilic anaerobic digestion kind mud, Biostimulation agent and buffer.
The technical principle of the present invention is as follows：
Realize key that the heating of sludge high temperature anaerobic digestion single step starts be to be successfully established thermophilic high temperature acid-producing bacteria group with
Metabolic balance between high temperature methanogen floras.Although relative abundance is relatively low, during thermophilic digestion flora still exists in
It in warm digestion system, can't be lost because of long-term cultivation, this is also the theoretical foundation that single step heating starts.But compared to
Bacteria flora, methane phase Gu bacterium flora growth period length, polymorphic variations are gentle and sensitive to variation of ambient temperature, lead to its turn
It is difficult to become dominant microflora in architectonical, occurs sour suppression easily in start-up course.The present invention is proposed by iron powder, NaHCO3With
The combination medicament that bio-carrier is constituted, can promote granular sludge and methanogen using appropriate particle size iron powder
Methanosarcina becomes the advantage of dominant microflora, realizes microorganism species metabolic balance, while passing through NaHCO3Maintain body
It is cushion performance, avoids the occurrence of sour Accumulation Phenomenon, provides attachment base for microorganism by bio-carrier, promote high temperature methanogen
The fast-growth breeding of group, realizes the metabolic balance of thermophilic high temperature acid-producing bacteria group and methanogen floras.
Compared with prior art, the present invention has following advantageous effect：
1, the present invention can substantially shorten the sludge high temperature anaerobic digestion single step heating Primary culture period, significantly improve and open
Efficiency of movement is simultaneously allowed to Effec-tive Function, can shorten 30 days or more compared to the traditional approach startup period；
2, present invention process is simple, cost of investment is low, condition is not harsh, for promoting sludge high temperature anaerobic digestion techniques
Promoting and applying has certain practice significance.
Specific implementation mode
With reference to specific embodiment, the present invention is described in detail.Following embodiment will be helpful to the technology of this field
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill of this field
For personnel, without departing from the inventive concept of the premise, various modifications and improvements can be made.These belong to the present invention
Protection domain.
Embodiment 1
Former mud solid content is adjusted to 20g/L, be subsequently transferred to anaerobic reactor and is preheated to 35 DEG C, 8% (volume of inoculation
Than) solid content be 20g/L mesophilic anaerobic digestion kind mud, be uniformly mixed.Suitable Biostimulation agent is added into mixed soil
With buffer group and medicament, specifically include：Particle size is the iron powder 1g/L of 0.015mm；600mg/LNaHCO3；Filling rate is
5% bio-carrier.Anaerobic reactor is sealed after mixing, and system is made to keep anaerobic state.It is heated up and is started using single step
System temperature is risen to 55 DEG C of high temperature and temperature is maintained to stablize relatively by mode.After digestion in 32 days, system produce biogas it is stable and
Acid concentration maintains reduced levels, thermophilic digestion start-up course to complete.
Embodiment 2
Former mud solid content is adjusted to 35g/L, be subsequently transferred to anaerobic reactor and is preheated to 35 DEG C, 10% (body of inoculation
Product ratio) solid content be 30g/L mesophilic anaerobic digestion kind mud, be uniformly mixed.Suitable biology is added into mixed soil to promote
Agent and buffer group and medicament, specifically include：Particle size is the iron powder 5g/L of 0.045mm；1000mg/LNaHCO3；Filling rate
For 5% bio-carrier.Anaerobic reactor is sealed after mixing, and system is made to keep anaerobic state.It is opened using single step heating
System temperature is risen to 55 DEG C of high temperature and temperature is maintained to stablize relatively by flowing mode.After digestion in 28 days, system is produced biogas and is stablized
And acid concentration maintains reduced levels, thermophilic digestion start-up course to complete.
Embodiment 3
Former mud solid content is adjusted to 35g/L, be subsequently transferred to anaerobic reactor and is preheated to 35 DEG C, inoculation 12.5%
The solid content of (volume ratio) is the mesophilic anaerobic digestion kind mud of 30g/L, is uniformly mixed.Suitable biology is added into mixed soil to promote
Into agent and buffer group and medicament, specifically include：Particle size is the iron powder 10g/L of 0.15mm；1200mg/L NaHCO3；It fills out
Fill the bio-carrier that rate is 10%.Anaerobic reactor is sealed after mixing, and system is made to keep anaerobic state.Using single step liter
System temperature is risen to 55 DEG C of high temperature and temperature is maintained to stablize relatively by startup temperature mode.After digestion in 21 days, system produces biogas
Stablize and acid concentration maintains reduced levels, thermophilic digestion start-up course to complete.
Embodiment 4
Former mud solid content is adjusted to 40g/L, be subsequently transferred to anaerobic reactor and is preheated to 35 DEG C, 15% (body of inoculation
Product ratio) solid content be 40g/L mesophilic anaerobic digestion kind mud, be uniformly mixed.Suitable biology is added into mixed soil to promote
Agent and buffer group and medicament, specifically include：Particle size is the iron powder 15g/L of 0.25mm；1500mg/L NaHCO3；Filling
The bio-carrier that rate is 15%.Anaerobic reactor is sealed after mixing, and system is made to keep anaerobic state.It is heated up using single step
System temperature is risen to 55 DEG C of high temperature and temperature is maintained to stablize relatively by Starting mode.After digestion in 27 days, it is steady that system produces biogas
Fixed and acid concentration maintains reduced levels, thermophilic digestion start-up course to complete.
Embodiment 5
Former mud solid content is adjusted to 50g/L, be subsequently transferred to anaerobic reactor and is preheated to 35 DEG C, 20% (body of inoculation
Product ratio) solid content be 40g/L mesophilic anaerobic digestion kind mud, be uniformly mixed.Suitable biology is added into mixed soil to promote
Agent and buffer group and medicament, specifically include：Particle size is the iron powder 20g/L of 0.425mm；1800mg/L NaHCO3；Filling
The bio-carrier that rate is 20%.Anaerobic reactor is sealed after mixing, and system is made to keep anaerobic state.It is heated up using single step
System temperature is risen to 55 DEG C of high temperature and temperature is maintained to stablize relatively by Starting mode.After digestion in 30 days, it is steady that system produces biogas
Fixed and acid concentration maintains reduced levels, thermophilic digestion start-up course to complete.
Embodiment 6
Former mud solid content is adjusted to 40g/L, be subsequently transferred to anaerobic reactor and is preheated to 35 DEG C, inoculation 12.5%
The solid content of (volume ratio) is the mesophilic anaerobic digestion kind mud of 20g/L, is uniformly mixed.Suitable biology is added into mixed soil to promote
Into agent and buffer group and medicament, specifically include：Particle size is the iron powder 5g/L of 0.15mm；600mg/L NaHCO3；Filling
The bio-carrier that rate is 10%.Anaerobic reactor is sealed after mixing, and system is made to keep anaerobic state.It is heated up using single step
System temperature is risen to 55 DEG C of high temperature and temperature is maintained to stablize relatively by Starting mode.After digestion in 26 days, it is steady that system produces biogas
Fixed and acid concentration maintains reduced levels, thermophilic digestion start-up course to complete.
Embodiment 7
Former mud solid content is adjusted to 20g/L, be subsequently transferred to anaerobic reactor and is preheated to 35 DEG C, 10% (body of inoculation
Product ratio) solid content be 40g/L mesophilic anaerobic digestion kind mud, be uniformly mixed.Suitable biology is added into mixed soil to promote
Agent and buffer group and medicament, specifically include：Particle size is the iron powder 10g/L of 0.425mm；1200mg/L NaHCO3；Filling
The bio-carrier that rate is 20%.Anaerobic reactor is sealed after mixing, and system is made to keep anaerobic state.It is heated up using single step
System temperature is risen to 55 DEG C of high temperature and temperature is maintained to stablize relatively by Starting mode.After digestion in 28 days, it is steady that system produces biogas
Fixed and acid concentration maintains reduced levels, thermophilic digestion start-up course to complete.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, those skilled in the art can make various deformations or amendments within the scope of the claims, this not shadow
Ring the substantive content of the present invention.
Claims (9)
- A kind of startup method 1. single step of sludge high temperature anaerobic digestion reaction heats up, which is characterized in that include the following steps：After former mud is heated to 35 DEG C with the heating rate of 3~5 DEG C/min under anaerobic, it is inoculated with mesophilic anaerobic digestion kind Mud, mixing；The combination medicament containing Biostimulation agent and buffer is added, single step is warming up to 55 DEG C, after lasting stirring, completes sludge The startup of thermophilic digestion reaction.
- The startup method 2. the single step of sludge high temperature anaerobic digestion reaction as described in claim 1 heats up, which is characterized in that institute It is municipal sludge to state former mud.
- The startup method 3. the single step of sludge high temperature anaerobic digestion reaction as described in claim 1 heats up, which is characterized in that institute It states mesophilic anaerobic digestion kind mud and comes from anaeration in normal temperature reactor, viable bacteria number is more than 108A/mL, solid content are 20~40g/ L, inoculum concentration are the 8~20% of former mud volume.
- The startup method 4. the single step of sludge high temperature anaerobic digestion reaction as described in claim 1 heats up, which is characterized in that institute The dosage for stating Biostimulation agent is that every liter of former mud adds 1~20g.
- The startup method 5. the single step of sludge high temperature anaerobic digestion reaction as described in claim 1 heats up, which is characterized in that institute It is iron powder to state Biostimulation agent, and the grain size of the iron powder is 0.015~0.425mm.
- The startup method 6. the single step of sludge high temperature anaerobic digestion reaction as described in claim 1 heats up, which is characterized in that institute The dosage for stating buffer is that every liter of former mud adds 600~1800mg.
- The startup method 7. the single step of sludge high temperature anaerobic digestion reaction as described in claim 1 or 6 heats up, feature exist In the buffer is sodium bicarbonate.
- The startup method 8. the single step of sludge high temperature anaerobic digestion reaction as described in claim 1 heats up, which is characterized in that institute It states and also contains bio-carrier in combination medicament, the bio-carrier includes polyurethane resin carrier.
- The startup method 9. the single step of sludge high temperature anaerobic digestion reaction as claimed in claim 8 heats up, which is characterized in that institute The filling rate for stating bio-carrier is 5~20%.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114315073A (en) * | 2021-12-15 | 2022-04-12 | 福建龙净环保股份有限公司 | Starting method of anaerobic digestion reactor |
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|---|---|---|---|---|
| US20140061125A1 (en) * | 2011-01-25 | 2014-03-06 | Dalian University Of Technology | Wastewater processing method of hydrolysis-acidification enhanced by addition of zero-valent iron (zvi) |
| CN105693056A (en) * | 2016-03-15 | 2016-06-22 | 同济大学 | Method for methanogenesis through anaerobic sludge digestion fortified by zero-valent nano-iron |
| CN105800897A (en) * | 2016-05-11 | 2016-07-27 | 合肥工业大学 | Method for intensifying rapid solid anaerobic digestion of residual sludge and straw by using zero-valent iron |
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2018
- 2018-01-30 CN CN201810090709.3A patent/CN108341571A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140061125A1 (en) * | 2011-01-25 | 2014-03-06 | Dalian University Of Technology | Wastewater processing method of hydrolysis-acidification enhanced by addition of zero-valent iron (zvi) |
| CN105693056A (en) * | 2016-03-15 | 2016-06-22 | 同济大学 | Method for methanogenesis through anaerobic sludge digestion fortified by zero-valent nano-iron |
| CN105800897A (en) * | 2016-05-11 | 2016-07-27 | 合肥工业大学 | Method for intensifying rapid solid anaerobic digestion of residual sludge and straw by using zero-valent iron |
Non-Patent Citations (1)
| Title |
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| J. PALATSI等: "Start-up strategies of thermophilic anaerobic digestion of sewage sludge", 《WATER SCIENCE & TECHNOLOGY》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114315073A (en) * | 2021-12-15 | 2022-04-12 | 福建龙净环保股份有限公司 | Starting method of anaerobic digestion reactor |
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