CN106145339A - A kind of mud takes off the methanogenic device of filtrate and technique - Google Patents
A kind of mud takes off the methanogenic device of filtrate and technique Download PDFInfo
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- CN106145339A CN106145339A CN201610705879.9A CN201610705879A CN106145339A CN 106145339 A CN106145339 A CN 106145339A CN 201610705879 A CN201610705879 A CN 201610705879A CN 106145339 A CN106145339 A CN 106145339A
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- carrier layer
- anaerobic reactor
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- filtrate
- conducting carrier
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- 239000000706 filtrate Substances 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 35
- 230000000696 methanogenic Effects 0.000 title claims abstract description 19
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 96
- 239000000969 carrier Substances 0.000 claims abstract description 77
- 239000010802 sludge Substances 0.000 claims abstract description 39
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 36
- 239000004917 carbon fiber Substances 0.000 claims abstract description 36
- 239000006229 carbon black Substances 0.000 claims abstract description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000006243 chemical reaction Methods 0.000 claims abstract description 13
- 238000005191 phase separation Methods 0.000 claims abstract description 6
- 239000002245 particle Substances 0.000 claims description 4
- BDAGIHXWWSANSR-UHFFFAOYSA-N formic acid Chemical compound OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 abstract description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 12
- 230000005540 biological transmission Effects 0.000 abstract description 10
- 239000002351 wastewater Substances 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 7
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 7
- 239000001257 hydrogen Substances 0.000 abstract description 7
- 241000894006 Bacteria Species 0.000 abstract description 6
- 230000000844 anti-bacterial Effects 0.000 abstract description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract description 5
- 108091006133 Electron carriers Proteins 0.000 abstract description 4
- 235000019253 formic acid Nutrition 0.000 abstract description 4
- 239000012530 fluid Substances 0.000 abstract description 3
- 230000037361 pathway Effects 0.000 abstract description 3
- 239000012071 phase Substances 0.000 description 93
- 239000010865 sewage Substances 0.000 description 19
- 238000000855 fermentation Methods 0.000 description 17
- 239000007788 liquid Substances 0.000 description 13
- 238000006297 dehydration reaction Methods 0.000 description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 10
- 239000007789 gas Substances 0.000 description 10
- 239000012496 blank sample Substances 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- 241000276438 Gadus morhua Species 0.000 description 5
- 235000019516 cod Nutrition 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 5
- 244000005700 microbiome Species 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- SZVJSHCCFOBDDC-UHFFFAOYSA-N Iron(II,III) oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 4
- 238000011081 inoculation Methods 0.000 description 4
- 239000008188 pellet Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 241000196324 Embryophyta Species 0.000 description 3
- 241000005139 Lycium andersonii Species 0.000 description 3
- 150000004666 short chain fatty acids Chemical class 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 235000013339 cereals Nutrition 0.000 description 2
- 239000002800 charge carrier Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000005518 electrochemistry Effects 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 238000010335 hydrothermal treatment Methods 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 239000002105 nanoparticle Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000009790 rate-determining step (RDS) Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-N Carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 229920005479 Lucite® Polymers 0.000 description 1
- 230000036740 Metabolism Effects 0.000 description 1
- UIIMBOGNXHQVGW-UHFFFAOYSA-M NaHCO3 Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 1
- 206010030113 Oedema Diseases 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 241000589516 Pseudomonas Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 210000004243 Sweat Anatomy 0.000 description 1
- 240000006365 Vitis vinifera Species 0.000 description 1
- 235000014787 Vitis vinifera Nutrition 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 235000021028 berry Nutrition 0.000 description 1
- 230000003851 biochemical process Effects 0.000 description 1
- 235000012970 cakes Nutrition 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000002361 compost Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 239000005446 dissolved organic matter Substances 0.000 description 1
- 239000010791 domestic waste Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 235000009754 grape Nutrition 0.000 description 1
- 235000012333 grape Nutrition 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 101700010476 lid-1 Proteins 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 230000035786 metabolism Effects 0.000 description 1
- 230000000813 microbial Effects 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 238000006385 ozonation reaction Methods 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000027756 respiratory electron transport chain Effects 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000031068 symbiosis, encompassing mutualism through parasitism Effects 0.000 description 1
- 230000001550 time effect Effects 0.000 description 1
- 238000002604 ultrasonography Methods 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
- C02F3/28—Anaerobic digestion processes
- C02F3/2813—Anaerobic digestion processes using anaerobic contact 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
- C02F3/005—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
- C02F3/2866—Particular arrangements for anaerobic reactors
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
- C02F2301/043—Treatment of partial or bypass streams
-
- 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 mud and take off the methanogenic device of filtrate and technique, this device includes anaerobic reactor, anaerobic reactor is divided into sludge reaction district, three-phase separation area and air chamber from the bottom to top, setting conducting carrier layer in described sludge reaction district, the conductive carrier in described conducting carrier layer is made up of the carbon fiber that mass ratio is 1:1 ~ 2:1 and white carbon black.Carbon fiber and white carbon black is inserted as conducting carrier layer in anaerobic reactor, make between methane phase Gu bacterium and syntrophism antibacterial in addition to carrying out electron transmission by the electron carrier such as hydrogen or formic acid, electron transmission between can also directly planting, provides more pathway of methane production for methanogen；Conducting carrier layer is fixed in the middle of anaerobic reactor, it is not easy to flows out with current and loses, it is also possible to is fully contacted with waste water and then improves methane phase speed；The waste water circulation used not only increases the Water l oad excessively of conducting carrier layer, increases the fluid effect of mud simultaneously, improves methane phase efficiency.
Description
Technical field
The present invention relates to a kind of mud and take off the methanogenic device of filtrate and technique, belong to field of environment engineering.
Background technology
Along with popularizing of municipal sewage plant of China, sludge yield continues speed to be increased.According to " urban construction statistics year
Mirror ", ended for the end of the year 2014, whole nation sludge yield has broken through 105700t/d (80% moisture content), and dewatered sludge amount reaches 21140t/d.
China's commonly used mechanical system of Sewage Plant is dehydrated at present, and mud average moisture content is about 80%, and common follow-up place
Reason disposal means such as compost, burn, landfill etc. is required to moisture content at 60% time, for reducing dehydrated sludge cake moisture content further, expire
The foot follow-up disposal requirement to moisture content, domestic and international researcher proposes the method for many deep dehydration pretreatment, including microwave
Method, supercritical ultrasonics technology, acid-base method, Ozonation, electrochemical process, hydrothermal treatment consists etc., the ultimate principle of these pretreatment is to promote
Organic substance in mud is hydrolyzed, and is transferred to liquid phase from solid phase by Organic substance, thus improves the dewatering of mud, but place
During reason, mud organic substance is dissolved in liquid phase so that in dehydration filtrate, COD increases, up to 30000mg/L during concentration height, therefore
De-filtrate preferably processes.
Mud takes off filtrate, and to be usually mud pre-through microwave, ultrasound wave, soda acid, ozone oxidation, electrochemistry, hydrothermal treatment consists etc.
Processing the dehydration filtrate produced, these preprocessing process also improve anaerobic sludge digestion while improving dewatering performance of sludge
Performance, therefore mud takes off the optimal processing method of filtrate is anaerobic fermentation process, by anaerobic fermentation methane phase, is solving de-filter
Liquid reclaims the energy while processing, and has significant economy and environment double benefit.
Anaerobic fermentation refers to Organic substance under anaerobic, by the common effect of multiple anaerobe, finally produces
The process of methane.Anaerobic fermentation is a complicated biochemical process, it is generally required to through the following four stage: hydrolysis stage, send out
Ferment produces acid phase, hydrogenesis and acetogenesis stage and methane phase stage.Wherein the methane phase stage is the final step of whole anaerobic fermentation,
Also being a most important step, the quality of this process will directly influence methane phase speed and the methane production of whole anaerobic fermentation.
Anaerobic bio-treated to dissolved organic matter, the methane phase stage is usually the rate-limiting step of whole anaerobic fermentation.
At present, although anaerobic fermentation technology has been widely used for sanitary sewage, industrial wastewater, domestic waste filtrate
And the process of landfill percolate and the exploitation of potential energy source, but there are still some problems, such as: anaerobic fermentation of organisms speed
Slowly, methane phase efficiency low etc., the main cause causing above-mentioned phenomenon is that methanogen activity is low.For homogenous anaerobic
For reactor, as long as after the hydrogen of hydrogenesis and acetogenesis process generation is made full use of by other antibacterial, the hydrogen dividing potential drop of system is
Relatively low scope can be maintained at and ensure that hydrogenesis and acetogenesis process is smoothed out, therefore anaerobic fermentation process need between Pseudomonas close
Symbiosis, this phenomenon is referred to as " hydrogen transmission between kind ".Methane phase process is by different types of microorganism alienation reciprocal action
Complete, studies have found that between methane phase Gu bacterium and syntrophism antibacterial except carrying out electron transmission by the electron carrier such as hydrogen or formic acid
Outward, it is also possible to electron transmission between directly planting.In the anaerobic fermentation methane phase system that multiple-microorganism coexists, directly
Between kind, electron transmission is electron exchange processes between an important kind, promotes that between the directly kind between microorganism, electron transfer can promote
Enter the metabolism of microorganism, improve methanogenic speed, the methane production of promotion system.
Moisture content is higher than the solid mud of height of 90% and mixes with rust by patent CN103420554A, inoculates anaerobe, puts
Methane is generated in anaerobic fermentation tank；A length of 20-25 days of the method fermentation time, has viscous due to sludge concentration height in sweat
Property cause mud and rust insufficient contact, and sludge anaerobic fermentation rate-limiting step be that in mud, the hydrolysis of solid organic matters is sent out
Ferment stage rather than methane phase stage, therefore the facilitation of rust is inconspicuous.
Graphite is additive by patent CN104561114A, joins in the anaerobic fermentation system of short-chain fatty acid, improves
Short-chain fatty acid anaerobic methane production efficiency and methane production；It is short-chain fatty acid that the method processes object, rather than actual production
Waste water, comparison of ingredients is single, and during methane phase, the relation between microorganism is relatively easy, and the pollutant in waste water are to methane phase
The inhibitory action of bacterium is the most inconspicuous, thus methane phase efficiency is high.
Patent CN104556371A discloses a kind of by adding Fe continuously3O4Nano-particle promotes and flows anaerobic reaction continuously
The method of device methane phase efficiency.Although the method is with actual waste water for processing object, but the Fe that the method uses3O4For nanometer
Grain, particle diameter is 40-80nm, easily flows out with current and cause Fe in stream anaerobic reactor continuously3O4Loss；And use receive
Rice grain Fe3O4, owing to its particle diameter is little, in waste water, the concentration (10g/L) of mud is low in addition so that Fe3O4Contact not with microorganism
Fully affect methane phase efficiency.
Summary of the invention
The present invention solves that domestic mud takes off the methane phase speed of filtrate anaerobic fermentation methane phase technology existence slowly, methane phase
Time is long, and provides a kind of and promote that mud takes off the quick methanogenic device of filtrate and technique, inserts conduction in anaerobic reactor
Carrier layer, makes methane phase speed improve 2-3 times, and the methane phase time shortens 10-12 days.
The technical scheme is that, it is provided that a kind of mud takes off the methanogenic device of filtrate, including anaerobic reactor, anaerobism
Reactor is divided into sludge reaction district, three-phase separation area and air chamber from the bottom to top, sets conducting carrier layer in described sludge reaction district, institute
The conductive carrier stated in conducting carrier layer is made up of the carbon fiber that mass ratio is 1:1 ~ 2:1 and white carbon black.
Further, a length of 5 ~ 15mm of described carbon fiber.
Further, the particle diameter of described white carbon black is 5 ~ 10mm.
Further, the thickness of described conducting carrier layer is the 10 ~ 15% of described sludge reaction district height.
Further, described conducting carrier layer includes two-layer silk screen and the conductive carrier being filled between two-layer silk screen.
Further, the thickness that described conductive carrier is filled accounts for the 3/5 ~ 4/5 of conductive carrier layer thickness.
Further, described conducting carrier layer is upper and lower bottom surface and side is all provided with meshed column type.
Further, the bottom of described anaerobic reactor sets water inlet pipe mouth, and top sets out hose nozzle, and middle part sets circulating water pipe
Mouthful, described conducting carrier layer is positioned at the middle part of anaerobic reactor and is positioned at the lower section of the recirculated water mouth of pipe.
The present invention provides the above-mentioned device of a kind of use to make mud take off filtrate further and produces methane.
Further, described mud takes off filtrate residence time in anaerobic reactor is 4 ~ 6 days.
The present invention solves that domestic mud takes off the methane phase speed of filtrate anaerobic fermentation methane phase technology existence slowly, methane phase
Time is long, and provides a kind of and promote that mud takes off the quick methanogenic method of filtrate, and the method inserts conduction in anaerobic reactor
Carrier layer (carbon fiber and white carbon black) so that except being entered by the electron carrier such as hydrogen or formic acid between methane phase Gu bacterium and syntrophism antibacterial
Outside row electron transmission, it is also possible to electron transmission between directly planting；And conducting carrier layer is fixed in the middle of anaerobic reactor, no
Easily flow out with current and lose, it is also possible to be fully contacted with waste water and then improve methane phase speed；The waste water circulation used is not
Increase only conducting carrier layer crosses Water l oad, increases the fluid effect of mud simultaneously, improves methane phase efficiency；The two-stage used
Three phase separator can realize high efficiency separation and the recovery of methane；2-3 times is improve, methane phase by the method methane phase speed
Time shortens 10-12 days.
Use carbon fiber and white carbon black relative to other conducting medium such as rust, graphite etc., there is stronger water absorbing properties, make
For conductive carrier, with mud take off filtrate time of contact for a long time, long action time, the pathway of methane production provided for methanogen is the most,
Therefore methane phase speed is fast, and the methane phase time is short；And carbon fiber and white carbon black are relative to rust, Fe3O4Nano-particle has acidproof
Alkali, corrosion-resistant, good in oxidation resistance, be difficult to aging, there is high chemical stability and extremely long service life.It addition, the present invention is also
Finding that the mass ratio adjusting between carbon fiber and white carbon black is relatively big on the impact of methanogenic efficiency, its reason is probably works as conductive carrier
The ratio of middle carbon fiber increases, owing to the electronegativity of carbon fiber strengthens so that conductive carrier electronegativity strengthen, and repel band
The methane phase Gu bacterium of negative charge and syntrophism antibacterial, decrease methanogenic approach so that methane phase speed and methane phase time phase
Relatively without during conductive carrier without significantly improving.
Compared with prior art, beneficial effects of the present invention:
1) in anaerobic reactor, insert carbon fiber and white carbon black as conducting carrier layer so that methane phase Gu bacterium and syntrophism antibacterial it
Between in addition to carrying out electron transmission by the electron carrier such as hydrogen or formic acid, it is also possible to electron transmission between directly planting, for produce
Methane backeria provides more pathway of methane production；
2) conducting carrier layer is fixed in the middle of anaerobic reactor, it is not easy to flows out with current and loses, it is also possible to be abundant with waste water
Contact and then raising methane phase speed；
3) waste water circulation used not only increases the Water l oad excessively of conducting carrier layer, increases the fluid effect of mud simultaneously, carries
High methane phase efficiency.
4) two-stage three phase separator is used can to realize high efficiency separation and the recovery of methane；
5) method that the present invention provides can realize methane phase speed and improve 2-3 times, and the methane phase time shortens 10-12 days.
Accompanying drawing explanation
Fig. 1 represents that the mud that the present invention provides takes off the structural representation of the methanogenic device of filtrate；
In figure: gas-liquid separator lid 1, three-phase separation area 1a, hot water jacket 1b, suspended sludge area 1c, sludge bulking district 1d, air chamber
2, anaerobic reactor housing 3, circulating water pipeline 4, intake pump 5, anaerobic reactor base 6, water-locator 7, hot water circulating pump 8, lead
Charge carrier layer 9, hot-water heater 10, N1-three phase separator 11, N2-three phase separator 12, inlet channel a, gas pipeline b, go out
Waterpipe c, sludge pipe d.
Fig. 2 represents the schematic diagram of conducting carrier layer；
In figure: side 9a, bottom surface 9b, mesh 9c and upper bottom surface 9d.
Fig. 3 represents that carbon fiber and white carbon black different quality are than lower methane phase speed and methane phase chronergy figure.
Detailed description of the invention
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
Embodiment 1
The present embodiment provides a kind of mud to take off the methanogenic device of filtrate, and its structure is as it is shown in figure 1, this device mainly includes anaerobism
Reactor, and the pipeline being connected with this anaerobic reactor；The present embodiment is the improvement for anaerobic reactor, at anaerobic reaction
The built-in conducting carrier layer of device.This anaerobic reactor mainly includes a circular reactor shell 3, reactor shell 3 inner chamber under
Upwards it is followed successively by sludge bulking district 1d, conducting carrier layer 9, sludge suspension district 1c, gas-liquid-solid three-phase Disengagement zone 1a, air chamber 2；Reaction
Setting water inlet bottom housing 3, water inlet connects inlet channel a, and water inlet sets a water-locator 7；N1-three phase separator 11,
N2-three phase separator 12 is positioned at three-phase separation area 1a；Reactor shell 3 uses lucite or fiberglass to make, the highest
Degree (i.e. the height in sludge reaction district) is H, and the height of conducting carrier layer 9 is the 12% of reactor shell effective depth H.Inlet channel a
Interior mud takes off filtrate and enters water-locator 7 by intake pump 5, and the sludge circulation water in the 1c of suspended sludge area passes through circulation pipe simultaneously
Road 4 takes off with mud at bottom even water distribution after filtrate mixes, and N1-three phase separator 11 and N2-three phase separator 12 is to upper
The mud risen retains.Reactor shell 3 is provided with hot water jacket 1b with the outer wall of lower part being positioned at three-phase separation area 1a, one
Hot-water heater 10 and hot water circulating pump 8 are connected through the upper and lower of pipeline with hot water jacket 1b.
Fig. 2 shows the schematic diagram of conducting carrier layer.Conducting carrier layer 9 is the rustless steel cylinder of upper shed, its height
For anaerobic reactor 3 effective depth H 12%.The side 9a upper bottom surface 9d and bottom surface 9b of cylinder is provided with many and is uniformly distributed
Squared mesh 9c, the spacing between squared mesh 9c is 4mm.The filling of conductive carrier filler is highly conducting carrier layer 9
2/3, reserve the need of space, the top water distribution uniformity of 1/3.
The work process of above-mentioned anaerobic reactor is as follows: mud is taken off filtrate and entered the dirt of reactor object 3 by intake pump 5
Mud breathing space 1d, is sufficiently mixed with sludge circulation water in bottom, with the micro-life in granule sludge in sewage uphill process simultaneously
Thing is fully contacted, and when arriving the sludge circulation water out of suspended sludge area 1c through conducting carrier layer 9, a part is by circulation
Pipeline 4 is back to bottom and continues reaction, and a part arrives N1-three phase separator 11, and the suspended sludge major part in sewage is cut
Staying, a part rises to N2-three phase separator 12, by suspended sludge and water, edema caused by disorder of QI from, separated sludge settling is to reactor
In housing 3, the clear water purified then passes through gas through outlet conduit c to discharge, the biogas that sewage produces with microbial reaction
Pipeline b collects, and mud can discharge from the sludge pipe d of suspended sludge area 1c.
Using excess sludge of municipal sewage plant is anaerobe source, uses the suspended solid in anaerobic reactor dense
Degree is 30g/L, uses described anaerobic reactor to carry out sludge water Grape berry dehydration filtrate (COD concentration is 10225mg/L) place
The step of reason is as follows:
The first step: mixed homogeneously by the carbon black pellet of the carbon fiber of 15mm with a diameter of 10mm, carbon fiber is the 1 of carbon black mass
Times, the mixture of carbon fiber with white carbon black is added in conducting carrier layer, when the mixture of carbon fiber Yu white carbon black fills up conductive carrier
Layer height 2/3 time, buckle silk screen；
Second step: be first positioned in the anaerobic reactor of inoculation by conducting carrier layer, puts into N1-three phase separator and N2-three-phase
Separator, reinstalls gas-liquid separator, finally covers the upper cover of gas-liquid separator；
3rd step: open that intake pump is maintained at 7 to anaerobic reactor supply pH value, temperature is maintained at the mud of 35 DEG C and takes off filtrate,
Take off the concentration of filtrate according to process mud, flow is set, and steps up sewage load；
4th step: open circulating sewage switch, arrange that the quality of backflow sewage is that mud takes off filtrate quality 18 times；
5th step: it is 6 days that mud takes off filtrate residence time in anaerobic reactor, clear water receives from outlet conduit c discharge, natural pond
Gas receives from gas pipeline b discharge, and mud receives from suspended sludge area 1c discharge.
In continuous running, record methane production tend towards stability the required time, calculate methanogenic speed.Simultaneously
Carry out reactor contrast (other Parameter Conditions are identical) of blank sample (without conducting carrier layer).
When the anaerobic reactor of experimental result display band conducting carrier layer processes hydrothermal pretreatment dehydration filtrate, carry without conduction
Maximum day methane phase speed of body layer is 3.2L/d(liter/sky, lower with), the methane phase time is 42 days, when with the addition of conductive carrier
During layer, maximum day methane phase speed be 12.8 L/d, the methane phase time is 30 days, and therefore (nothing is led than blank sample the methane phase time
Charge carrier layer) time shorten 12 days, methane phase speed improves 3 times.
Embodiment 2
Using the suspended sediment concentration in anaerobic reactor is 20g/L, uses described anaerobic reactor to carry out sludge through ultrasonic waves pre-
The step that process dehydration filtrate (COD concentration is 4969mg/L) processes is as follows:
The first step: the carbon black pellet of the carbon fiber of 10mm with a diameter of 8mm is mixed homogeneously, carbon fiber is 2 times of carbon black mass,
The mixture of carbon fiber with white carbon black is added in conducting carrier layer, when the mixture of carbon fiber Yu white carbon black fills up conductive carrier floor height
Degree 2/3 time, buckle silk screen；
Second step: be first positioned in the anaerobic reactor of inoculation by conducting carrier layer, puts into N1-three phase separator and N2-three-phase
Separator, reinstalls gas-liquid separator, finally covers the upper cover of gas-liquid separator；
3rd step: open that intake pump is maintained at 7.2 to anaerobic reactor supply pH value, temperature is maintained at the de-filter of mud of 36 DEG C
Liquid, takes off the concentration of filtrate, arranges flow, and step up sewage load according to process mud；
4th step: open circulating sewage switch, arrange that the quality of backflow sewage is that mud takes off filtrate quality 20 times；
5th step: it is 4 days that mud takes off filtrate residence time in anaerobic reactor, clear water receives from outlet conduit c discharge, natural pond
Gas receives from gas pipeline b discharge, and mud receives from suspended sludge area 1c discharge.
In continuous running, record methane production tend towards stability the required time, calculate methanogenic speed.Simultaneously
Carry out reactor contrast (other Parameter Conditions are identical) of blank sample (without conducting carrier layer).
When the anaerobic reactor of experimental result display band conducting carrier layer processes ultrasonic pretreatment dehydration filtrate, without conduction
Maximum day methane phase speed of carrier layer is 1.5L/d, and the methane phase time is 40 days, when with the addition of conducting carrier layer, and maximum day
Methane phase speed is 4.5L/d, and the methane phase time is 30 days, therefore the methane phase time than blank sample (without conducting carrier layer) time
Between shorten 10 days, methane phase speed improves 2 times.
Embodiment 3
Using the suspended sediment concentration in anaerobic reactor is 30g/L, uses described anaerobic reactor to carry out mud electrochemistry pre-
The step that process dehydration filtrate (COD concentration is 7829mg/L) processes is as follows:
The first step: mixed homogeneously by the carbon black pellet of the carbon fiber of 5mm with a diameter of 5mm, carbon fiber is the 1.5 of carbon black mass
Times, the mixture of carbon fiber with white carbon black is added in conducting carrier layer, when the mixture of carbon fiber Yu white carbon black fills up conductive carrier
Layer height 2/3 time, buckle silk screen；
Second step: be first positioned in the anaerobic reactor of inoculation by conducting carrier layer, puts into N1-three phase separator and N2-three-phase
Separator, reinstalls gas-liquid separator, finally covers the upper cover of gas-liquid separator；
3rd step: open that intake pump is maintained at 6.8 to anaerobic reactor supply pH value, temperature is maintained at the de-filter of mud of 34 DEG C
Liquid, takes off the concentration of filtrate, arranges flow, and step up sewage load according to process mud；
4th step: open circulating sewage switch, arrange that the quality of backflow sewage is that mud takes off filtrate quality 16 times；
5th step: it is 5 days that mud takes off filtrate residence time in anaerobic reactor, clear water receives from outlet conduit c discharge, natural pond
Gas receives from gas pipeline b discharge, and mud receives from suspended sludge area 1c discharge.
In continuous running, record methane production tend towards stability the required time, calculate methanogenic speed.Simultaneously
Carry out reactor contrast (other Parameter Conditions are identical) of blank sample (without conducting carrier layer).
When the anaerobic reactor of experimental result display band conducting carrier layer processes electrochemical pre-treatment dehydration filtrate, without conduction
Maximum day methane phase speed of carrier layer is 2.6L/d, and the methane phase time is 41 days, when with the addition of conducting carrier layer, and maximum day
Methane phase speed is 10.4L/d, and the methane phase time is 29 days, therefore the methane phase time than blank sample (without conducting carrier layer) time
Between shorten 12 days, methane phase speed improves 3 times.
Embodiment 4
Using the suspended sediment concentration in anaerobic reactor is 25g/L, uses described anaerobic reactor to carry out mud thermokalite and locates in advance
The step that reason dehydration filtrate (COD concentration is 7829mg/L) processes is as follows:
The first step: the carbon black pellet of the carbon fiber of 10mm with a diameter of 8mm is mixed homogeneously, carbon fiber is 2 times of carbon black mass,
The mixture of carbon fiber with white carbon black is added in conducting carrier layer, when the mixture of carbon fiber Yu white carbon black fills up conductive carrier floor height
Degree 2/3 time, buckle silk screen；
Second step: be first positioned in the anaerobic reactor of inoculation by conducting carrier layer, puts into N1-three phase separator and N2-three-phase
Separator, reinstalls gas-liquid separator, finally covers the upper cover of gas-liquid separator；
3rd step: open that intake pump is maintained at 7.0 to anaerobic reactor supply pH value, temperature is maintained at the de-filter of mud of 35 DEG C
Liquid, takes off the concentration of filtrate, arranges flow, and step up sewage load according to process mud；
4th step: open circulating sewage switch, arrange that the quality of backflow sewage is that mud takes off filtrate quality 18 times；
5th step: it is 5 days that mud takes off filtrate residence time in anaerobic reactor, clear water receives from outlet conduit c discharge, natural pond
Gas receives from gas pipeline b discharge, and mud receives from suspended sludge area 1c discharge.
In continuous running, record methane production tend towards stability the required time, calculate methanogenic speed.Simultaneously
Carry out reactor contrast (other Parameter Conditions are identical) of blank sample (without conducting carrier layer).
When the anaerobic reactor of experimental result display band conducting carrier layer processes alkaline Pretreatment dehydration filtrate, carry without conduction
Maximum day methane phase speed of body layer is 2.5L/d, and the methane phase time is 40 days, when with the addition of conducting carrier layer, and maximum daily output
Methane speed is 7.5L/d, and the methane phase time is 29 days, and therefore the methane phase time is than the time of blank sample (without conducting carrier layer)
Shortening 11 days, methane phase speed improves 2 times.
Comparative example 1
By the operating procedure of embodiment 1, only change carbon fiber and the mass ratio of white carbon black, the methane phase that will obtain in conducting carrier layer
Time and maximum day methane phase speed mapping, obtain Fig. 3.It can be seen that the mass ratio of carbon fiber and white carbon black is to methanogenic effect
Rate impact is relatively big, and when the mass ratio of carbon fiber Yu white carbon black is 1:1 and 2:1, the methane phase time shorter is 30 and 32 days, maximum day
Methane phase speed is 12.8 L/d and 11.2L/d, and methane phase speed has been respectively increased 3 times and 2.5 times；When carbon fiber and white carbon black
When mass ratio is 0.5:1 and 3:1, the methane phase time and without during conductive carrier without substantially shortening, be 40 and 41 days, maximum daily output first
Alkane speed, also without significantly improving, is 3.8 L/d and 3.0 L/d, it can be seen that the mass ratio of carbon fiber and white carbon black is to methane phase speed
Rate and methane phase time effects are relatively big, and when the mass ratio of carbon fiber and white carbon black is 1:1-2:1, effect is best, too high and too low to product
Methane speed and methane phase time are without significant change.
Claims (10)
1. mud takes off the methanogenic device of filtrate, and including anaerobic reactor, anaerobic reactor is divided into mud anti-from the bottom to top
Answer district, three-phase separation area and air chamber, set conducting carrier layer, the conductive carrier in described conducting carrier layer in described sludge reaction district
Carbon fiber and white carbon black by mass ratio is 1:1 ~ 2:1 form.
2. device as claimed in claim 1, it is characterised in that a length of 5 ~ 15mm of described carbon fiber.
3. device as claimed in claim 1, it is characterised in that the particle diameter of described white carbon black is 5 ~ 10mm.
4. device as claimed in claim 1, it is characterised in that the thickness of described conducting carrier layer is that described sludge reaction district is high
The 10 ~ 15% of degree.
5. device as claimed in claim 1, it is characterised in that described conducting carrier layer includes two-layer silk screen and is filled in two-layer
Conductive carrier between silk screen.
6. device as claimed in claim 5, it is characterised in that the thickness that described conductive carrier is filled accounts for conductive carrier layer thickness
3/5 ~ 4/5.
7. device as claimed in claim 1, it is characterised in that described conducting carrier layer is upper and lower bottom surface and side is equipped with
The column type of mesh.
8. device as claimed in claim 1, it is characterised in that the bottom of described anaerobic reactor sets water inlet pipe mouth, and top sets
Effluent pipe mouth, middle part sets the recirculated water mouth of pipe；Described conducting carrier layer is positioned at the middle part of anaerobic reactor and is positioned at the recirculated water mouth of pipe
Lower section.
9. a mud takes off the methanogenic technique of filtrate, it is characterised in that use the device described in any one of claim 1-8 raw
Methane phase.
Technique the most as claimed in claim 9, it is characterised in that described mud takes off what filtrate stopped in anaerobic reactor
Time is 4 ~ 6 days.
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