CN109231449A - A method of improving sulfate-containing organic wastewater methane phase efficiency - Google Patents
A method of improving sulfate-containing organic wastewater methane phase efficiency Download PDFInfo
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- CN109231449A CN109231449A CN201811195989.0A CN201811195989A CN109231449A CN 109231449 A CN109231449 A CN 109231449A CN 201811195989 A CN201811195989 A CN 201811195989A CN 109231449 A CN109231449 A CN 109231449A
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- Prior art keywords
- sulfate
- containing organic
- organic wastewater
- reactor
- carbon nanotube
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 72
- 238000000034 method Methods 0.000 title claims abstract description 36
- 239000002351 wastewater Substances 0.000 title claims abstract description 29
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 title claims abstract description 28
- 239000010802 sludge Substances 0.000 claims abstract description 36
- 239000008187 granular material Substances 0.000 claims abstract description 17
- 239000002109 single walled nanotube Substances 0.000 claims abstract description 7
- 238000009280 upflow anaerobic sludge blanket technology Methods 0.000 claims abstract 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000007789 gas Substances 0.000 claims description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 238000005273 aeration Methods 0.000 claims description 3
- 239000010865 sewage Substances 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 17
- 239000002041 carbon nanotube Substances 0.000 abstract description 14
- 229910021393 carbon nanotube Inorganic materials 0.000 abstract description 14
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000006243 chemical reaction Methods 0.000 abstract description 6
- 238000012423 maintenance Methods 0.000 abstract description 4
- 230000002045 lasting effect Effects 0.000 abstract description 3
- 230000002572 peristaltic effect Effects 0.000 description 4
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910002651 NO3 Inorganic materials 0.000 description 2
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 235000014113 dietary fatty acids Nutrition 0.000 description 2
- DNJIEGIFACGWOD-UHFFFAOYSA-N ethanethiol Chemical compound CCS DNJIEGIFACGWOD-UHFFFAOYSA-N 0.000 description 2
- 229930195729 fatty acid Natural products 0.000 description 2
- 239000000194 fatty acid Substances 0.000 description 2
- 150000004665 fatty acids Chemical class 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 239000002028 Biomass Substances 0.000 description 1
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000002071 nanotube Substances 0.000 description 1
- 239000010815 organic waste Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/005—Combined electrochemical biological processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
- C02F3/2846—Anaerobic digestion processes using upflow anaerobic sludge blanket [UASB] reactors
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/101—Sulfur compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Abstract
The invention discloses a kind of methods for improving sulfate-containing organic wastewater methane phase efficiency, including take anaerobic sludge, add single-walled carbon nanotube thereto, form mixed layer, then under anaerobic environment, by sulfate-containing organic wastewater by the mixed layer, generated methane in waste water is recycled.Compared with the existing technology, the present invention forms anaerobism " conduction " granule sludge, can significantly improve sulfate-containing organic wastewater methane phase efficiency, 20%-30% can be improved in methane production using addition single-walled carbon nanotube.In addition, utilizing the operation characteristic of UASB, it can be ensured that carbon nanotube resides in reaction system for a long time, the process for avoiding lasting addition carbon nanotube, to make technique be simplified and reduce maintenance cost.
Description
Technical field
The present invention relates to a kind of method for improving sulfate-containing organic wastewater methane phase efficiency, belong to extraction methane skill in waste water
Art field.
Background technique
A large amount of organic wastewaters for being rich in sulfate can be generated in the industrial processes such as pharmacy, chemical industry and papermaking, compared to
The presence of common organic wastewater, sulfate increases the difficulty of its Anaerobic Digestion.Reason is sulfate-reducing process
Electronics is not only competed with methane phase process, and the hydrogen sulfide formed can seriously inhibit the activity of methanogen, cause fatty acid tired
Product even methane phase process stops, to substantially reduce the efficiency of methane resource recycling.Research has shown that, 1 kilogram of sulfuric acid of every reduction
Root can lead to methane production and reduce 0.23 cubic metre.In addition, the hydrogen sulfide that municipal sewer pipe generates has always been considered as being stench
With the important cause of corrosive pipeline, global range loses up to 90,000,000,000 dollars as caused by corrosive pipeline, sulfate
Reduction is always a need process to be controlled.Over more than 60 years, scientists study goes out a variety of sides for inhibiting sulfate reduction
Method, such as widely used nitrate and sulfate analog etc. are added into system.Recently, the research of Zero-valent Iron is also
The problem provides new solution route, mitigates electronics as extra electron donor by addition Zero-valent Iron and competes, and subsequent life
At ferrous sulfide precipitating can then slow down the toxic action of stench and hydrogen sulfide to methanogen, realize improve methane phase efficiency
Purpose.But the various additives in aforesaid way can be rapidly depleted, therefore duration is needed to add, so that there are techniques
The shortcomings that complexity increases and maintenance cost increases.Therefore, it finds that a kind of simple process, cost is relatively low, and electronics can be made
It more flows to methane phase process while weakening sulfate reduction, to realize that the approach of efficient methane phase will be one particularly significant
Research topic.
Anaerobic grain sludge is the microbial aggregate of high density, has the advantages such as the more, anti impulsion load of biomass, with
Upflow anaerobic sludge blanket process (UASB) based on anaerobic grain sludge is widely used in waste water fermentation process field, especially
It is the industrial wastewater for high organic loading or high-sulfate concentration.But it research shows that is still had up to using the technique
The electronics of 20-50% can be used for sulfate-reducing process, therefore methane phase efficiency has very big space to be hoisted, therefore to the work
Skill improves, and regulation electronic distribution is very necessary to improve methane phase efficiency.
Summary of the invention
Goal of the invention: in order to solve the above technical problems, the purpose of the present invention is to provide a kind of raising sulfate organic wastes
The method of aquatic products methane efficiency, this method can significantly improve methane production.
Technical solution: to achieve the above object of the invention, the invention adopts the following technical scheme:
A method of sulfate-containing organic wastewater methane phase efficiency is improved, including takes anaerobic sludge, adds single wall thereto
Carbon nanotube forms mixed layer, then under anaerobic environment, by sulfate-containing organic wastewater by the mixed layer, and is formed and is detested
Oxygen " conduction " granule sludge, and then recycle generated methane in waste water.
Further, the method for the raising sulfate-containing organic wastewater methane phase efficiency, comprising the following steps:
(1) UASB reactor is used, the sludge of sewage treatment plant's anaerobic reactor is inoculated with, and adds single wall carbon into sludge
Nanotube forms mixed layer；
(2) reactor is aerated using nitrogen；
(3) sulfate-containing organic wastewater is pumped into UASB reactor bottom end water inlet, by mixed layer, generates detest in the process
Oxygen " conduction " granule sludge layer generates gas and is discharged by UASB top export.
It is preferred that:
Step (1) seed sludge VSS concentration is 50g/L or so, and the dosage of the single-walled carbon nanotube is 1.5-2.0g/
L。
Step (2) is greater than 99.99% nitrogen with purity and is aerated to reactor, and aeration time is 15-25 minutes.
Batch-type inner loop mode is taken to run UASB first, until forming anaerobism " conduction " granule sludge blank；Anti-
After answering device start completion, the operational mode of reactor is changed into continuous flow mode, hydraulic detention time (HRT) from batch mode
11-13h is maintained, influent load maintains 3.2-3.4g COD/L.
The UASB reactor, total volume 5.6L, reaction zone volume 2.9L, inside diameter 0.7dm are highly
Water bath with thermostatic control layer is wrapped up in 10.6dm, reactor outside, and temperature maintains 37 ± 0.5 DEG C.Three sample taps are respectively distributed to
At 5.2dm, 7.2dm, 10.6dm.Peristaltic pump is used to control outle water rate.Reactor exit is equipped with gas flowmeter to measure
Gas generates volume.
Microorganism can be connected by carbon nanotube to be formed netted, can finally be formed and be wound through carbon nanotube under external force
Granule sludge, i.e. anaerobism " conduction " granule sludge.Carbon nanotube will form electricity abundant in anaerobism " conduction " granule sludge
Sub- transmission channels can strengthen the direct inter-species electron transmission between collaboration fatty acid oxidation bacterium and methanogen, thus greatly
Improve methane phase efficiency.Therefore, the present invention, which constructs anaerobism " conduction " granule sludge by addition carbon nanotube, can strengthen methane phase
The competitiveness of process, and the technique is applied to the efficient methane phase process of sulfate-containing organic wastewater.In addition, in view of the operation of UASB
Feature can ensure that carbon nanotube resides in reaction system for a long time, relative to the modes such as addition nitrate, anaerobism in prior art
The process that " conduction " granule sludge system avoids lasting addition carbon nanotube, to make technique be simplified and reduce maintenance
Expense.It can be seen that building anaerobism " conduction " granule sludge will be the effective way for strengthening sulfate-containing organic wastewater methane phase efficiency
Diameter.
Technical effect: compared with the existing technology, the present invention utilizes monomer carbon nanotube, passes through the dirt of anaerobism " conduction " particle
Mud, can significantly improve sulfate-containing organic wastewater methane phase efficiency, and 20%-30% can be improved in methane production.In addition, utilizing UASB
Operation characteristic, it can be ensured that carbon nanotube resides in reaction system for a long time, avoid it is lasting addition carbon nanotube process, from
And it is simplified technique and reduces maintenance cost.
Detailed description of the invention
Fig. 1 is anaerobism of the present invention " conduction " granule sludge compared with the internal microstructure of common anaerobic grain sludge；
Fig. 2 is the UASB reactor assembly structural schematic diagram that the present invention uses, in which: 1 is sulfate-containing organic wastewater, and 2 are
Water-bath insulating layer, 3 be anaerobism " conduction " granule sludge, and 4 be peristaltic pump, and 5 be gas flowmeter, and 6 be sample tap one, and 7 be sampling
Mouth two, 8 be sample tap three.
Specific embodiment
Technical solutions according to the invention are further described in detail below by specific embodiment.
Embodiment 1
(1) UASB reactor is used, the sludge of sewage treatment plant's anaerobic reactor is inoculated with, seed sludge VSS concentration is
50g/L or so contains a large amount of anaerobes in sludge, and activity is higher.
(2) as shown in Fig. 2, reactor total volume 5.6L, reaction zone volume 2.9L, inside diameter 0.7dm are highly
Water bath with thermostatic control layer is wrapped up in 10.6dm, reactor outside, and temperature maintains 37 ± 0.5 DEG C.Three sample taps are respectively distributed to
At 5.2dm, 7.2dm, 10.6dm.Peristaltic pump is used to control outle water rate.Reactor exit is equipped with gas flowmeter to measure
Gas generates volume.
(3) adding the single-walled carbon nanotube of 1.5g/L, i.e. for 4.35g in reactor, dosage is more than theoretical value (1g/L),
To prevent the loss of part carbon nanotube in start-up course.
(4) it is greater than 99.99% nitrogen with purity to be aerated reactor, aeration time is 20 minutes, anti-to ensure
It answers in device as anaerobic environment.
(5) sulfate wastewater is pumped into UASB reactor bottom end water inlet via peristaltic pump, by anaerobic sludge and carbon nanometer
Pipe mixed layer generates gas and is discharged by UASB top export
(6) it takes batch-type inner loop mode to run UASB first, makes most of to be carbon nanotube adsorption in sludge, thus
It can guarantee that the carbon nanotube concentration in reaction system is not less than 1g/L, circulation pattern in continuous service batch-type is until form anaerobism
" conduction " granule sludge blank.
(7) after the completion of reactor start-up, the operational mode of reactor is changed into continuous flow mode, water from batch mode
The power residence time (HRT) maintains 12h, and influent load maintains 3.3g COD/L.
As a result: the methane production compared with common anaerobic grain sludge system, in anaerobism " conduction " granule sludge system
Improve 29.5%.
Embodiment 2
Same as Example 1, the difference is that the dosage of addition single-walled carbon nanotube is 2.0g/L, final result can
: compared with common anaerobic grain sludge system, the methane production in anaerobism " conduction " granule sludge system improves 21.4%.
Claims (5)
1. a kind of method for improving sulfate-containing organic wastewater methane phase efficiency, which is characterized in that including taking anaerobic sludge, thereto
Single-walled carbon nanotube is added, mixed layer is formed, then under anaerobic environment, sulfate-containing organic wastewater is passed through into the mixed layer,
Recycle generated methane in waste water.
2. it is according to claim 1 improve sulfate-containing organic wastewater methane phase efficiency method, which is characterized in that including with
Lower step:
(1) UASB reactor is used, the sludge of sewage treatment plant's anaerobic reactor is inoculated with, and adds single into sludge
Pipe forms mixed layer；
(2) reactor is aerated using nitrogen；
(3) sulfate-containing organic wastewater is pumped into UASB reactor bottom end water inlet and generates anaerobism in the process by mixed layer
" conduction " granule sludge layer generates gas and is discharged by UASB top export.
3. the method according to claim 2 for improving sulfate-containing organic wastewater methane phase efficiency, which is characterized in that step
(1) dosage of the single-walled carbon nanotube is 1.5-2.0g/L.
4. the method according to claim 2 for improving sulfate-containing organic wastewater methane phase efficiency, which is characterized in that step
(2) it is greater than 99.99% nitrogen with purity to be aerated reactor, aeration time is 15-25 minutes.
5. the method according to claim 2 for improving sulfate-containing organic wastewater methane phase efficiency, which is characterized in that adopt first
Batch-type inner loop mode is taken to run UASB, until forming anaerobism " conduction " granule sludge blank；After the completion of reactor start-up,
The operational mode of reactor is changed into continuous flow mode from batch mode, and hydraulic detention time (HRT) maintains 11-13h, into
Water l oad maintains 3.2-3.4g COD/L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811195989.0A CN109231449A (en) | 2018-10-15 | 2018-10-15 | A method of improving sulfate-containing organic wastewater methane phase efficiency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811195989.0A CN109231449A (en) | 2018-10-15 | 2018-10-15 | A method of improving sulfate-containing organic wastewater methane phase efficiency |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109231449A true CN109231449A (en) | 2019-01-18 |
Family
ID=65053094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811195989.0A Pending CN109231449A (en) | 2018-10-15 | 2018-10-15 | A method of improving sulfate-containing organic wastewater methane phase efficiency |
Country Status (1)
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111135792A (en) * | 2019-12-31 | 2020-05-12 | 曲阜师范大学 | Multiwalled carbon nanotube hybrid sludge-based carbon composite material and preparation method and application thereof |
| CN112875851A (en) * | 2021-02-03 | 2021-06-01 | 沈阳大学 | Method for treating organic wastewater by promoting aerobic sludge granulation through carbon nano tubes |
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| CN104973685A (en) * | 2015-05-21 | 2015-10-14 | 沈阳环境科学研究院 | Method for culturing aerobic granular sludge |
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2018
- 2018-10-15 CN CN201811195989.0A patent/CN109231449A/en active Pending
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Cited By (3)
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Application publication date: 20190118 |