CN108624623A - A method of strengthening residual active sludge hydrogen production through anaerobic fermentation - Google Patents
A method of strengthening residual active sludge hydrogen production through anaerobic fermentation Download PDFInfo
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- CN108624623A CN108624623A CN201810605311.9A CN201810605311A CN108624623A CN 108624623 A CN108624623 A CN 108624623A CN 201810605311 A CN201810605311 A CN 201810605311A CN 108624623 A CN108624623 A CN 108624623A
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- sludge
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- excess sludge
- composite salts
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- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P3/00—Preparation of elements or inorganic compounds except carbon dioxide
Abstract
The present invention relates to a kind of potassium hydrogen persulfate composite salts (PMS) to promote the method that excess sludge anaerobic fermentation produces hydrogen.Specific method includes：(1) residual active sludge generated using municipal sewage plant's secondary settling tank obtains mud sample as fermentation raw material after natural subsidence removal supernatant carries out concentration；(2) mud sample is mixed into pretreatment with potassium hydrogen persulfate composite salts (PMS), is then inoculated with the production hydrogen kind mud of certain volume, ferments under anaerobic environment, generate hydrogen.Excess sludge is after PMS is pre-processed, the dissolution of organic matter in sludge is accelerated, the organic matter dissolved out after sludge disintegration provides abundant matrix for fermentation and hydrogen production, to improve hydrogen output, the time for shortening sludge anaerobic fermentation, realize the utilization again of excess sludge.Method provided by the invention is easy to operate, and reaction condition is mild, has a good application prospect in environmental improvement, the comprehensive utilization of waste resource etc..
Description
Technical field
The invention belongs to environmental protection and field of solid waste treating technology, and in particular to a kind of potassium hydrogen peroxymonosulfate
The method that complex salt (PMS) pretreating sludge anaerobic fermentation produces hydrogen.
Technical background
With the increase of construction of municipal effluent plant dynamics and scale, excess sludge largely generates.However, due to dirt
Mud processing cost is high, and technological challenge is strong, and in Treatment of Sludge, only 35% sludge can be disposed by reasonable benefit/risk.In sludge
Containing noxious materials such as a large amount of odorants, heavy metal, pathogen, if substantial pollution will be caused to environment by not dealing carefully with.According to
Speculate, arrive the year two thousand twenty, the sludge yield in China will break through 60,000,000 tons.Therefore, how reasonably processing is carried out to sludge to dispose
It is a urgent problem to be solved.
Anaerobic digestion is to realize the important channel of excess sludge production clean energy resource.There is a large amount of micro- life in excess sludge
Object can discharge abundant carbohydrate and protein after microbial body cell wall rupture, be a kind of ideal production hydrogen feedstock.
Water is only generated as a kind of " clean energy resource ", during combustion of hydrogen without generating other pollutants, it can be achieved that really " zero "
Discharge.Hydrogen is produced using excess sludge, waste is not only rationally utilized, reduces the environment caused by a large amount of excess sludges
Problem, and produce clean energy resource simultaneously, reduce hydrogen manufacturing cost and protect environment, it is that the current debirs that solve pollute
Environment, recycling hydrogen manufacturing an important research direction.
Excess sludge anaerobic digestion is broadly divided into following several stages：Hydrolysis, acidification, hydrogenesis and acetogenesis and methane phase rank
Section.In order to improve the hydrogen output of sludge anaerobic fermentation process, in existing sludge produces hydrogen technology, current research mainly collects
In be inoculated with special strain, such as improve production hydrogen by adding purebred hydrogenogen kind or the enrichment hydrogenogen of culture；Or it is logical
It crosses pretreatment (such as heating, ultrasound, ozone and soda acid processing) means breaking sludge and discharges organic matter to improve hydrogen output.
However there is the problems such as energy consumption is big, secondary pollution is serious, process control is complicated in these methods, make sludge anaerobic fermentation by
To inhibition, therefore environmentally friendly, safe, simple, effective excess sludge anaerobic fermentation method is the research hotspot of Treatment of Sludge.
Potassium hydrogen persulfate composite salts (PMS), chemical formula 2KHSO5·KHSO4·K2SO4, principle active component is
KHSO5.PMS is a kind of stabilization, the excellent acidic oxidation agent conveniently, with extensive use, frequently as Water Disinfection agent,
The mechanism of action is：PMS itself has very strong oxidisability, and can generate potentiometric titrations SO4 -, there is very strong oxygen
Change reduction potential (2.5-3.1eV), destroy the cell wall of microorganism, so that organic matter in microbial body is discharged, reach and kill in water
The effect of microorganism.Therefore, potassium hydrogen persulfate composite salts are introduced anaerobic sludge digestive system by the present invention, promote excess sludge
Hydrogen is produced in anaerobic digestion.
Invention content
The purpose of the present invention is to provide a kind of methods that reinforcing excess sludge anaerobic digestion generates hydrogen, add PMS and carry
The amount of high excess sludge anaerobic digestion production hydrogen.
In order to achieve the above object, solution of the invention is：
It is a kind of to improve hydrogen using potassium hydrogen persulfate composite salts (PMS) as preprocessing means reinforcement sludge anaerobic fermentation
The method of yield, includes the following steps：
(1) residual active sludge generated using municipal sewage plant's secondary settling tank is removed as fermentation raw material through natural subsidence
Supernatant obtains mud sample after carrying out concentration；
(2) mud sample is mixed into pretreatment with potassium hydrogen persulfate composite salts (PMS), is inoculated with the production of certain volume
Hydrogen kind mud, ferments under anaerobic environment, generates hydrogen.
In the step (1), sludge is municipal wastewater treatment plant secondary settling tank excess sludge, and quiet heavy temperature is 4 DEG C, the sedimentation time
For for 24 hours.
In the step (2), the dosage that adds of PMS is 0.02~0.2g PMS/g VSS, preferably 0.06~0.1g
PMS/g VSS。
In the step (2), after PMS is added in the sludge, first 300rpm quickly stirs 5min, then 150rpm stirrings
100min, so that medicament is sufficiently mixed with sludge.
In the step (2), the production hydrogen kind mud of the inoculation is anaerobic grain sludge after 80 DEG C of heating water baths 2 hours
Sludge.
In the step (2), the kind mud volume of the inoculation is the 10% of excess sludge volume.
In the step (2), anaerobic environment is nitrogen environment, to by being passed through nitrogen in pretreated sludge
No oxygen exists in 1.5min to reactor, and it is 35 ± 1 DEG C that reactor sealing, which is put into temperature, mixing speed 120rpm/min
Shaking table in carry out anaerobic fermentation.
Do not have to adjust sludge pH in reactor in the step (2), in whole process.
In the step (2), the time of sludge anaerobic fermentation is 2-8d.
In a preferred embodiment, it is 0.06~0.1g PMS/g VSS that PMS, which adds dosage,.Although the PMS is used
Amount can promote the organic matter in sludge to be converted into hydrogen (0.02~0.2g PMS/g VSS) in a certain range, and
It is more apparent to the facilitation of Effecting Hydrogen Production from Anaerobic Fermentation of Excess Sewage Sludge with the increase of PMS in a certain range.But consider raw material
The relationship of cost and the yield of hydrogen, the comparatively ideal PMS amount ranges that the present invention uses is 0.06~0.1g PMS/g VSS.
As a result of above technical scheme, the invention has the advantages that：
1, the oxidant that the present invention is fermented using potassium hydrogen persulfate composite salts (PMS) as sludge anaerobic has very strong
Oxidability, improve sludge in organic matter release, the biodegradability of sludge more can be improved after fermentation, improve the biology of sludge
Degradation capability again.The hydrogen-producing speed of sludge is improved, the time of sludge anaerobic fermentation is shortened, to realizing the resource of excess sludge
Change, innoxious and minimizing is of great significance.
2, the present invention treated sludge is for producing hydrogen, realize excess sludge utilize again and clean energy resource
Generation, greatly reduce the processing cost of sewage plant excess sludge, economize on resources, be successfully realized town sewage plant residue
Sludge stabilizing, minimizing and recycling realize the purpose for reducing mud organic substance pollution environment.
Description of the drawings
Fig. 1 is the process flow diagram of the present invention.
Fig. 2 is the figure of protein (Protein) in supernatant after pre-processing under the conditions of different pretreatments.
Specific implementation mode
Below in conjunction with specific embodiment, the invention will be further described, but protection model not thereby limiting the invention
It encloses.
Embodiment 1
(1) in the organic glass reactor that swept volume is 5.0L, by the excess sludge of sewage treatment plant's discharge at 4 DEG C
Lower natural sedimentation for 24 hours, obtains required mud sample after discarding supernatant liquid concentration, is produced the mud sample as anaerobic fermentation
The substrate of hydrogen；
(2) it takes the fermentation substratess 500mL obtained in step (1) in anaerobic reactor, adds 0.06g/g VSS and cross a sulphur
Potassium hydrogen phthalate complex salt (PMS) quickly stirs 5min with magnetic stirring apparatus elder generation 300rpm, then 150rpm stirs 100min, so that medicine
Agent is sufficiently mixed with sludge.The inoculation production hydrogen kind mud 50ml into anaerobic reactor, by anaerobic reactor inflated with nitrogen 1.5min to go
Except oxygen therein, shaking table progress hydrogen production through anaerobic fermentation is put into after sealing anaerobic reactor.Wherein, shaker fermentation temperature be 35 ±
1 DEG C, hunting speed 120rpm/min, fermentation time (i.e. the residence time of sludge in the reactor) is 4d, the hydrogen of production
Cumulative production reach maximum, be 12.31mL/g VSS.
Embodiment 2
(1) in the organic glass reactor that swept volume is 5.0L, by the excess sludge of sewage treatment plant's discharge at 4 DEG C
Lower natural sedimentation for 24 hours, obtains required mud sample after discarding supernatant liquid concentration, is produced the mud sample as anaerobic fermentation
The substrate of hydrogen；
(2) it takes the fermentation substratess 500mL obtained in step (1) in anaerobic reactor, adds 0.12g/g VSS and cross a sulphur
Potassium hydrogen phthalate complex salt (PMS) quickly stirs 5min with magnetic stirring apparatus elder generation 300rpm, then 150rpm stirs 100min, so that medicine
Agent is sufficiently mixed with sludge.The inoculation production hydrogen kind mud 50ml into anaerobic reactor, by anaerobic reactor inflated with nitrogen 1.5min to go
Except oxygen therein, shaking table progress hydrogen production through anaerobic fermentation is put into after sealing anaerobic reactor.Wherein, shaker fermentation temperature be 35 ±
1 DEG C, hunting speed 120rpm/min, fermentation time (i.e. the residence time of sludge in the reactor) is 4d, the hydrogen of production
Cumulative production reach maximum, be 10.20mL/g VSS.
Comparative example 1
(1) in the organic glass reactor that swept volume is 5.0L, by the excess sludge of sewage treatment plant's discharge at 4 DEG C
Lower natural sedimentation for 24 hours, obtains required mud sample after discarding supernatant liquid concentration, is produced the mud sample as anaerobic fermentation
The substrate of hydrogen；
(2) it takes the fermentation substratess 500mL obtained in step (1) in anaerobic reactor, it is multiple not to add potassium hydrogen peroxymonosulfate
Salt (PMS) is closed, only the inoculation production hydrogen kind mud 50ml into anaerobic reactor, by anaerobic reactor inflated with nitrogen 1.5min to remove wherein
Oxygen, seal anaerobic reactor after be put into shaking table carry out hydrogen production through anaerobic fermentation.Wherein, shaker fermentation temperature is 35 ± 1 DEG C, is shaken
It is 120rpm/min to swing speed, and fermentation time (i.e. the residence time of sludge in the reactor) is 5d, the accumulation of the hydrogen of production
Yield reaches maximum, is 8.72mL/g VSS.
Comparative example 2
(1) in the organic glass reactor that swept volume is 5.0L, by the excess sludge of sewage treatment plant's discharge at 4 DEG C
Lower natural sedimentation for 24 hours, obtains required mud sample after discarding supernatant liquid concentration, is produced the mud sample as anaerobic fermentation
The substrate of hydrogen；
(2) it takes the fermentation substratess 500mL obtained in step (1) in anaerobic reactor, it is multiple not to add potassium hydrogen peroxymonosulfate
Salt (PMS) is closed, is not inoculated with production hydrogen kind mud, directly by anaerobic reactor inflated with nitrogen 1.5min to remove oxygen therein, sealing is detested
It is put into shaking table after oxygen reactor and carries out hydrogen production through anaerobic fermentation.Wherein, shaker fermentation temperature is 35 ± 1 DEG C, and hunting speed is
120rpm/min, fermentation time (i.e. the residence time of sludge in the reactor) are 8d, and the cumulative production of the hydrogen of production reaches
Maximum is 1.43mL/g VSS.
The hydrogen output of embodiment and comparative example is as shown in table 1：
The fermentation comparison sheet of 1 embodiment of table and comparative example
As it can be seen from table 1 the yield of embodiment to the hydrogen of comparative example is greatly improved, it can in conjunction with table 1 and Fig. 2
To obtain, after PMS is pre-processed, protein 810.91mg/L, significantly larger than blank group and inoculation mud group.Due to fermentation
Significantly increasing for the substrate of hydrogen is produced, therefore improves hydrogen generation efficiency, improves the low problem of former mud hydrogen generation efficiency, and shorten and detest
Aerobe fermentation produces the time of hydrogen.
The above-mentioned description to embodiment is that this hair can be understood and used for the ease of those skilled in the art
It is bright.Although the present invention is disclosed as above with preferred embodiment, however, it is not intended to limit the invention.Do not departing from the present invention's
In the case of Spirit Essence and technical solution, person skilled in the art can make many to technical solution of the present invention can
The modification of energy, or it is revised as the equivalent embodiment of equivalent variations.Therefore, it is every do not depart from scope do it is any simple
Improvement and modification all should be within protection scope of the present invention.
Claims (8)
1. a kind of potassium hydrogen persulfate composite salts (PMS) strengthen the method that excess sludge anaerobic digestion generates hydrogen, feature exists
In including the following steps：
The residual active sludge for taking municipal sewage plant's secondary settling tank to generate carries out concentration through natural subsidence removal supernatant
After obtain mud sample, the mud sample is mixed into pretreatment with potassium hydrogen persulfate composite salts (PMS), is inoculated with certain volume
Production hydrogen kind mud, ferment under anaerobic environment, generate hydrogen.
It is generated 2. a kind of potassium hydrogen persulfate composite salts (PMS) according to claim 1 strengthen excess sludge anaerobic digestion
The method of hydrogen, it is characterised in that：The sludge is municipal wastewater treatment plant secondary settling tank excess sludge, and quiet heavy temperature is 4 DEG C, when precipitation
Between for for 24 hours.
It is generated 3. a kind of potassium hydrogen persulfate composite salts (PMS) according to claim 1 strengthen excess sludge anaerobic digestion
The method of hydrogen, it is characterised in that：The PMS add dosage be 0.02~0.2g PMS/gVSS, preferably 0.06~
0.1g PMS/gVSS。
It is generated 4. a kind of potassium hydrogen persulfate composite salts (PMS) according to claim 1 strengthen excess sludge anaerobic digestion
The method of hydrogen, it is characterised in that：After PMS is added in the sludge, first 300rpm quickly stirs 5min, then 150rpm stirrings
100min, so that medicament is sufficiently mixed with sludge.
It is generated 5. a kind of potassium hydrogen persulfate composite salts (PMS) according to claim 1 strengthen excess sludge anaerobic digestion
The method of hydrogen, it is characterised in that：The production hydrogen kind mud of the inoculation is anaerobic grain sludge after 80 DEG C of heating water baths 2 hours
The kind mud volume of sludge, inoculation is the 10% of excess sludge volume.
It is generated 6. a kind of potassium hydrogen persulfate composite salts (PMS) according to claim 1 strengthen excess sludge anaerobic digestion
The method of hydrogen, it is characterised in that：It is deposited to by being passed through no oxygen in nitrogen 1.5min to reactor in pretreated sludge
, by reactor sealing be put into temperature be 35 ± 1 DEG C, mixing speed be 120rpm/min shaking table in carry out anaerobic fermentation.
It is generated 7. a kind of potassium hydrogen persulfate composite salts (PMS) according to claim 1 strengthen excess sludge anaerobic digestion
The method of hydrogen, it is characterised in that：Do not have to adjust sludge pH in reactor in whole process.
It is generated 8. a kind of potassium hydrogen persulfate composite salts (PMS) according to claim 1 strengthen excess sludge anaerobic digestion
The method of hydrogen, it is characterised in that：The time of the sludge fermentation is 4-8d.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109680012A (en) * | 2019-01-02 | 2019-04-26 | 湖南大学 | A method of enhancing excess sludge anaerobic fermentation generates hydrogen |
| CN110204161A (en) * | 2019-05-30 | 2019-09-06 | 湖南大学 | A method of sludge, which is improved, using neopelex (SDBS) generates hydrogen |
| CN110747237A (en) * | 2019-11-14 | 2020-02-04 | 湖南大学 | Method for promoting dehydration of excess sludge and simultaneously producing fatty acid |
| CN111732462A (en) * | 2020-05-28 | 2020-10-02 | 中国农业大学 | Treating agent and method for anaerobic digestion of livestock and poultry manure |
| CN113697949A (en) * | 2021-08-20 | 2021-11-26 | 中钢集团鞍山热能研究院有限公司 | Short-flow anaerobic reactor device and high-concentration organic wastewater pretreatment method |
| CN114394724A (en) * | 2022-01-17 | 2022-04-26 | 同济大学 | Method for improving sludge anaerobic fermentation hydrogen yield by using calcium hypochlorite |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109680012A (en) * | 2019-01-02 | 2019-04-26 | 湖南大学 | A method of enhancing excess sludge anaerobic fermentation generates hydrogen |
| CN110204161A (en) * | 2019-05-30 | 2019-09-06 | 湖南大学 | A method of sludge, which is improved, using neopelex (SDBS) generates hydrogen |
| CN110747237A (en) * | 2019-11-14 | 2020-02-04 | 湖南大学 | Method for promoting dehydration of excess sludge and simultaneously producing fatty acid |
| CN111732462A (en) * | 2020-05-28 | 2020-10-02 | 中国农业大学 | Treating agent and method for anaerobic digestion of livestock and poultry manure |
| CN113697949A (en) * | 2021-08-20 | 2021-11-26 | 中钢集团鞍山热能研究院有限公司 | Short-flow anaerobic reactor device and high-concentration organic wastewater pretreatment method |
| CN113697949B (en) * | 2021-08-20 | 2023-03-10 | 中钢集团鞍山热能研究院有限公司 | Short-process anaerobic reactor device and high-concentration organic wastewater pretreatment method |
| CN114394724A (en) * | 2022-01-17 | 2022-04-26 | 同济大学 | Method for improving sludge anaerobic fermentation hydrogen yield by using calcium hypochlorite |
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Application publication date: 20181009 |