CN103288319B - Method for accelerating anaerobic fermentation of residual sludge by utilizing zero-valent iron technology - Google Patents
Method for accelerating anaerobic fermentation of residual sludge by utilizing zero-valent iron technology Download PDFInfo
- Publication number
- CN103288319B CN103288319B CN201310244932.6A CN201310244932A CN103288319B CN 103288319 B CN103288319 B CN 103288319B CN 201310244932 A CN201310244932 A CN 201310244932A CN 103288319 B CN103288319 B CN 103288319B
- Authority
- CN
- China
- Prior art keywords
- anaerobic fermentation
- mud
- sludge
- iron
- solid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
A method for accelerating anaerobic fermentation of residual sludge by utilizing a zero-valent iron technology comprises the following steps: mixing a high solid sludge with a solid ratio of less than 10% and iron scraps, putting the mixture into an anaerobic fermentation reactor, and inoculating with anaerobic microorganisms; undergoing the anaerobic fermentation in the reactor with stirring, and collecting methane generated during the fermentation process; having requirements of the stirring speed, the pH value in the reactor, the temperature control during the stirring process; after finishing fermentation, discharging the sludge, wherein the residual iron scraps remaining in the anaerobic fermentation reactor are used for next batch of the sludge fermentation. With the method for accelerating the anaerobic fermentation of the residual sludge by utilizing the zero-valent iron technology, the following technical effects are achieved: reduction of the high solid sludge is promoted after the anaerobic fermentation, and at the same time, the methane generation amount during the fermentation process is improved. The method has low investment cost, simple technical operation, and strong processing ability, and can be applied to upgrade reconstruction of new built sludge anaerobic fermentation equipment or existing equipment.
Description
Technical field
The present invention relates to the method for a kind of sludge anaerobic fermentation.
Background technology
High solid mud is the solid waste produced in sewage work's operational process, and refer generally to the second pond mud through chemical coagulation and mechanism filter-pressing, its water ratio is at 80-90%.The mud of current municipal sewage plant discharge is through basis being the solid mud of the height after press filtration.By 2012, the whole nation is built urban wastewater treatment firm 2163, daily handling ability reaches 1,426 ten thousand tons, this number also has larger growth at the Two decades years in future, so high sewage load, must cause the increase of high solid municipal sludge, according to estimates, the high solid mud annual production in the whole nation is at present about about 6,000 ten thousand tons.The current whole nation is not yet ripe for the treatment and disposal technology of the solid mud of height, only has the Sewage Plant less than 1/3 to have high solid sludge stabilization treatment facility, and the solid mud of height of more than 90% is dealt carefully with, and high solid mud secondary pollution phenomenon is very general.
Anaerobically fermenting processes one of most popular method of solid waste at present, not only can make solid waste reducing, and can generate methane as the energy.At present, the low solid sludge technology of anaerobically fermenting process solids content 3-4% is more ripe, generally through the anaerobically fermenting of 20-30 days, can realize sludge reduction and energy recovery simultaneously.But be the municipal sludge of 10-20% for solid content, common anaerobic fermentation technology is more difficult.In Practical Project, the solid mud of the higher height of organic loading, generally needs to carry out to dilute, pre-treatment, adds promotor etc., just can carry out anaerobic treatment.Pretreated object carries out broken wall to dead cell in mud, to improve follow-up ferment effect.Conventional preconditioning technique comprises alkaline purification, thermal treatment, ultrasonic etc.But these pre-treatment costs are higher, more difficultly to apply in practice.Some adopt the method adding the promotor such as stomach knurl liquid, rubbish from cooking, improve the report of the methods such as anaerobion activity.But also there is material and not easily obtain or run the problems such as unstable.In recent years, external sharp Pu tank anaerobic technology starts application at home, but when processing the mud of high solids content, still there is larger performance boost space.
Summary of the invention
For technical problems such as the anaerobic fermentation technology cycle solving high solid mud in prior art are long, methane production amount is few, the present invention proposes following technical scheme: a kind of method utilizing zero-valent iron technology to accelerate excess sludge anaerobically fermenting, and it comprises the following steps: first get the solid mud of height that solid content is less than 10%.Get sheet or granular iron filings again, its surface area controls at 10cm
2within.Removing surface and oil contaminant.Be oxidized 3-5 days in atmosphere after the rustless iron filings in surface need trickle, make its Surface Creation thickness be the iron rust of 1-2mm.In the ratio of every Kg height solid mud 1 ~ 20g iron filings, solid for height mud is mixed with iron filings, load anaerobic fermentation reactor.It is 10g that the solid mud of every Kg height adds iron filings optimum proportion.Inoculate anaerobion according to the ratio of anaerobion and the solid mud 1:9 of pending height, stir.The optimum value of anaerobion and the solid mud ratio of pending height is 1:9.Good seal reactor, reactor carries out anaerobically fermenting under whipped state, collects the methane produced in fermenting process simultaneously.Reactor uses electric mixer to stir.Mixing speed is 50 ~ 120rpm.Best mixing speed is 90 ~ 100rpm.In reactor, pH value controls between 6 ~ 8, and optimal ph is 7.In reactor, temperature controls at 25 ~ 37 DEG C, and optimum temps is 37 DEG C.Under whipped state, carry out anaerobically fermenting, fermentation time is 20 ~ 25 days, and Best Times is 22 days.After fermentation ends, mud is discharged.Residual iron filings can stay the sludge fermentation of carrying out next batch in anaerobic fermentation tank.
The zero-valent iron technology that utilizes that have employed technique scheme accelerates the method for excess sludge anaerobically fermenting, reaches following technique effect: promote the high solid minimizing of mud after anaerobically fermenting, improve methane-generated quantity in fermenting process simultaneously.The cost of investment of this technology is few, and technological operation is simple, and processing power is strong, can be applied to newly-built sludge anaerobic fermentation equipment or the upgrading of existing installation.
Embodiment
Application mechanism of the present invention is: 1, the iron rust on iron filings surface is separated out under the effect of microorganism, the ferriferous oxide of separating out promotes the enrichment of iron-reducing bacterium, iron-reducing bacterium directly makes its mineralising with oxidation operation, reduces organic loading, is conducive to high process of consolidating mud.2, the fe that iron rust is separated out in rear iron filings comes out, and the iron ion of stripping, improves the activity of proteolytic ferment, accelerates the liquefaction Sum decomposition of mud, promotes methanogenesis activity simultaneously, strengthens methane production.
Concrete operation step is as follows: 1, get high solid mud and wait to ferment, the solid mud of height here can be sewage work's precipitating sludge, also can be through the solid sludges after chemical dehydration, mechanism filter-pressing dehydration.The solid content of this mud is 20%, it must be diluted one times, is less than 10% to solid content.If the solid content of primary sludge is different, then dilutes corresponding share, make pending mud solid content reach less than 10%.
2, a certain amount of sheet or granular discarded iron filings are got, as far as possible with discarded iron filings, removing surface and oil contaminant.Iron filings are sheet or particulate state, and its surface area should control at 10cm
2within.If iron filings size is comparatively large, need to be cut to surface area 10cm
2fritter or small pieces.Iron filings surface if any iron rust without the need to remove.In order to increase treatment effect, removing surface and oil contaminant.Be oxidized 3-5 days in atmosphere by after its trickle, make its Surface Creation thickness be the iron rust of 1-2mm.
3, in the ratio of every Kg height solid mud 1 ~ 20g iron filings, solid for height mud is mixed with iron filings, load anaerobic fermentation reactor.It is 10g that the solid mud of every Kg height adds iron filings optimum proportion.
4, inoculate anaerobion according to the ratio of anaerobion and the solid mud 1:9 of pending height, then stir, iron filings and anaerobion are uniformly distributed.The optimum value of anaerobion and the solid mud ratio of pending height is 1:9.
5, good seal reactor, reactor carries out anaerobically fermenting under whipped state, meanwhile collects the methane produced in fermenting process.
6, reactor uses electric mixer to stir, and mixing speed is 50 ~ 120rpm, and best mixing speed is 90 ~ 100rpm,
7, in reactor, pH value controls between 6 ~ 8, and optimal ph is 7
8, in reactor, temperature controls at 25 ~ 37 DEG C, and optimum temps is 37 DEG C
9, under whipped state, carrying out anaerobically fermenting, is 20 ~ 25 days between when fermentation, and Best Times is 22 days.
10, after fermentation ends, mud is discharged, and residual iron filings can stay the sludge fermentation of carrying out next batch in anaerobic fermentation tank.
Below by embodiment, the present invention will be further described.
Embodiment 1:
Get solid content be less than 10% the solid mud of height wait to ferment, get iron filings (sheet) and add 10g by the solid mud of every Kg height, inoculate anaerobion subsequently and stir, the mud after mixing being added in anaerobic fermentation reactor, good seal reactor.Reactor utilizes electric mixer to stir, and mixing speed is 70rpm, carries out anaerobically fermenting 20 days under whipped state, and pH value controls 7, leavening temperature 37 DEG C.Can methane phase gas 15.4L after the solid sludge fermentation of every Kg height terminates.High solid sludge volume reduces 29.5%.
Embodiment 2:
Get solid content be less than 10% the solid mud of height wait to ferment, get iron filings (sheet) and add 5g by the solid mud of every Kg height, inoculate anaerobion subsequently and stir, the mud after mixing being added in anaerobic fermentation reactor, good seal reactor.Reactor utilizes electric mixer to stir, and mixing speed is 70rpm, carries out anaerobically fermenting 20 days under whipped state, and pH value controls 7, leavening temperature 37 DEG C.Can methane phase gas 14.2L after the solid sludge fermentation of every Kg height terminates.High solid sludge volume reduces 27.1%.
Embodiment 3:
Get solid content be less than 10% the solid mud of height wait to ferment, get iron filings (sheet) and add 10g by the solid mud of every Kg height, inoculate anaerobion subsequently and stir, the mud after mixing being added in anaerobic fermentation reactor, good seal reactor.Reactor utilizes electric mixer to stir, and mixing speed is 70rpm, carries out anaerobically fermenting 20 days under whipped state, and pH value controls 7, leavening temperature 25 DEG C.Can methane phase gas 12.4L after the solid sludge fermentation of every Kg height terminates.High solid sludge volume reduces 24.5%.
Embodiment 4:
Get solid content be less than 10% the solid mud of height wait to ferment, get iron filings (sheet) and add 10g by the solid mud of every Kg height, inoculate anaerobion subsequently and stir, the mud after mixing being added in anaerobic fermentation reactor, good seal reactor.Reactor utilizes electric mixer to stir, and mixing speed is 70rpm, carries out anaerobically fermenting 25 days under whipped state, and pH value controls 7, leavening temperature 37 DEG C.Can methane phase gas 16.8L after the solid sludge fermentation of every Kg height terminates.High solid sludge volume reduces 32.5%.
Embodiment 5:
Get solid content be less than 10% the solid mud of height wait to ferment, get iron filings (sheet) and add 10g by the solid mud of every Kg height, inoculate anaerobion subsequently and stir, the mud after mixing being added in anaerobic fermentation reactor, good seal reactor.Reactor utilizes electric mixer to stir, and mixing speed is 90rpm, carries out anaerobically fermenting 22 days under whipped state, and pH value controls 7, leavening temperature 37 DEG C.Can methane phase gas 17.5L after the solid sludge fermentation of every Kg height terminates.High solid sludge volume reduces 34.5%.
The present invention, by a kind of like this technology utilizing the high solid sludge anaerobic fermentation of iron technology promotion, makes zero-valent iron technology successfully be coupled with sludge anaerobic fermentation technique, thus reaches significantly the promotion decrement of mud and the technique effect of methane generation.
Claims (1)
1. the method utilizing zero-valent iron technology to accelerate excess sludge anaerobically fermenting, it is characterized in that: the iron rust on iron filings surface is separated out under the effect of microorganism, the ferriferous oxide of separating out promotes the enrichment of iron-reducing bacterium, iron-reducing bacterium directly and oxidation operation make its mineralising, reduce organic loading, be conducive to the process of high solid mud; The fe that iron rust is separated out in rear iron filings comes out, and the iron ion of stripping improves the activity of proteolytic ferment, accelerates the liquefaction Sum decomposition of mud, promotes methanogenesis activity simultaneously, strengthens methane production; Concrete operation step comprises:
(1) the solid mud of height that solid content is less than 10% is got;
(2) get sheet or granular iron filings, its surface area controls at 10cm
2within, removing surface and oil contaminant, is oxidized 3-5 days in atmosphere after the rustless iron filings in surface need trickle, makes its Surface Creation thickness be the iron rust of 1-2mm;
(3) in the ratio of every kg height solid mud 1g iron filings, solid for height mud is mixed with iron filings, load anaerobic fermentation tank;
(4) consolidate the ratio of mud 1:5 ~ 1:10 according to anaerobion and pending height, inoculation anaerobion, then stirs;
(5) good seal anaerobic fermentation tank, anaerobic fermentation tank carries out anaerobically fermenting under whipped state, collects the methane produced in fermenting process simultaneously;
(6) anaerobic fermentation tank uses electric mixer to stir, and mixing speed is 50 ~ 120r/min;
(7) in anaerobic fermentation tank, pH value controls between 6 ~ 8;
(8) in anaerobic fermentation tank, temperature controls at 25 ~ 37 DEG C;
(9) under whipped state, carry out anaerobically fermenting, fermentation time is 20 ~ 25 days;
(10) after fermentation ends, mud is discharged, and residual iron filings stay the sludge fermentation of carrying out next batch in anaerobic fermentation tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310244932.6A CN103288319B (en) | 2013-06-19 | 2013-06-19 | Method for accelerating anaerobic fermentation of residual sludge by utilizing zero-valent iron technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310244932.6A CN103288319B (en) | 2013-06-19 | 2013-06-19 | Method for accelerating anaerobic fermentation of residual sludge by utilizing zero-valent iron technology |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103288319A CN103288319A (en) | 2013-09-11 |
| CN103288319B true CN103288319B (en) | 2015-02-04 |
Family
ID=49089931
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310244932.6A Active CN103288319B (en) | 2013-06-19 | 2013-06-19 | Method for accelerating anaerobic fermentation of residual sludge by utilizing zero-valent iron technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103288319B (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103555775A (en) * | 2013-10-22 | 2014-02-05 | 同济大学 | Method for producing volatile fatty acid through promoting anaerobic fermentation of kitchen wastes |
| CN104803566B (en) * | 2014-01-27 | 2017-01-25 | 中国科学院大连化学物理研究所 | Method for hydraulic dehydration and anaerobic fermentation treatment of sludge in municipal domestic sewage treatment plant |
| CN104193002B (en) * | 2014-09-24 | 2016-08-17 | 山东大学 | A kind of method efficiently processing nitrogenous effluent based on Zero-valent Iron coupling Anammox |
| CN105502870B (en) * | 2014-09-25 | 2019-01-29 | 锐博环保科技(北京)有限公司 | A kind of Zero-valent Iron reinforcement sludge anaerobism pre-reaction device and sludge pre-treatment method |
| CN104710019B (en) * | 2015-02-27 | 2017-01-25 | 华东理工大学 | Zero-valent iron/activated sludge coupled chlorhydrocarbon/dioxane combined pollution treatment method |
| CN104911217A (en) * | 2015-06-04 | 2015-09-16 | 北京大学深圳研究生院 | Anaerobic digestion treatment method for kitchen waste |
| CN105036320B (en) * | 2015-07-02 | 2017-06-30 | 中国环境科学研究院 | A kind of magnetic field-intensification iron powder improves the method that debirs and anaerobic waste water produce biogas efficiency |
| CN106381315B (en) * | 2016-11-25 | 2019-11-05 | 太原理工大学 | Strengthen the method for quinoline anaerobic degradation and methane phase using the iron filings that get rusty |
| CN107557792A (en) * | 2017-07-31 | 2018-01-09 | 常州诺丁精密机械制造有限公司 | A kind of method using blue-green algae to steel derusting |
| CN108249728A (en) * | 2018-03-19 | 2018-07-06 | 江苏理工学院 | The kitchen garbage of addition iron plane flower cooperates with Anaerobic Digestion technique with municipal sludge |
| CN108585401A (en) * | 2018-04-13 | 2018-09-28 | 华南理工大学 | A kind of method of low-temperature water heating solution combination molysite reinforcement sludge anaerobic digestion |
| CN111689666A (en) * | 2020-06-19 | 2020-09-22 | 陕西科技大学 | Method for improving methane production by anaerobic fermentation of excess sludge |
| CN115583773A (en) * | 2022-08-30 | 2023-01-10 | 湖南平安环保股份有限公司 | Method for improving methane yield in anaerobic digestion process of sludge by using nano zero-valent iron |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11333416A (en) * | 1998-05-27 | 1999-12-07 | Kubota Corp | Method for recycling resource from organic waste |
| CN102093097B (en) * | 2010-12-15 | 2012-12-26 | 广东省生态环境与土壤研究所 | Method for production of organic ferric fertilizer by sludge composting |
| CN102140001B (en) * | 2010-12-17 | 2015-03-25 | 合肥工业大学 | Method for increasing methane production efficiency in organic waste anaerobic process |
| CN102443400B (en) * | 2011-10-22 | 2014-01-08 | 广东省生态环境与土壤研究所 | Ternary composite organic pollution repairing agent containing iron oxide, humus and reducing bacteria thereof, and preparation method of repairing agent |
-
2013
- 2013-06-19 CN CN201310244932.6A patent/CN103288319B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN103288319A (en) | 2013-09-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103288319B (en) | Method for accelerating anaerobic fermentation of residual sludge by utilizing zero-valent iron technology | |
| CN103332829B (en) | Enhanced sewage biological nitrogen and phosphorus removal method bases on polyhydroxyalkanoate metabolism regulation | |
| CN104031949A (en) | Method for improving acid production quality and acetic acid proportion in anaerobic fermentation of residue active sludge | |
| CN102603135B (en) | Method for producing biogas by aid of intensified anaerobic fermentation of circular backflow sludge in microwave and alkali combined treatment | |
| CN108265087B (en) | Method for promoting anaerobic fermentation of sludge to produce volatile fatty acid | |
| CN113233597B (en) | Method for treating middle and late landfill leachate by endogenous denitrification combined with autotrophic nitrogen removal process | |
| CN105366899B (en) | A kind of Fenton oxidation technique of ozone anaerobism iron reduction combination mud decrement | |
| CN112592015B (en) | Method for promoting anaerobic digestion of sludge to produce methane | |
| CN101250005A (en) | Cassava grain stillage anaerobic treatment method | |
| CN102531311A (en) | Method for treating sludge through refluxing of acidified fermentation liquor and application of method | |
| CN106915883A (en) | A kind of minimizing of endogenous FNA pretreating sludges and process for reclaiming | |
| CN110092558A (en) | A kind of bioremediation improving kitchen garbage anaerobism biogas residue dehydration property | |
| CN114634379A (en) | Improvement method for alkaline pyrohydrolysis of sludge and polypeptide amino acid fertilizer | |
| CN103224304B (en) | Method for removing nitrogen phosphorus from sludge fermentation liquid to improve organic acid recycling effect | |
| CN103420554B (en) | Iron rust is utilized to promote excess sludge methane phase method | |
| CN108033555B (en) | Method for quickly starting anaerobic biological treatment system of leachate of waste incineration plant | |
| CN211471183U (en) | Device for treating Fenton iron mud | |
| CN111115842B (en) | Method for treating ammonium perchlorate wastewater | |
| CN104724896A (en) | Method for promoting anaerobic degradation of estrogen nonylphenol in sludge through alkali treatment | |
| CN110759605B (en) | Uranium-polluted water body microorganism treatment method capable of effectively resisting U (IV) reoxidation | |
| CN102491587A (en) | Method and device for treating early urban landfill leachate | |
| CN101885561A (en) | Recombinant decorative material production waste water treatment process | |
| CN104529106B (en) | Copper sulfate promotes the methanogenic method of excess sludge anaerobic digestion | |
| CN111333222A (en) | Method for removing COD in landfill leachate | |
| CN103992015A (en) | Process for improving dewaterability of excess biochemical sludge |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |