CN106477842A - A kind of method that utilization horizontal type anaerobic reactor processes excess sludge - Google Patents
A kind of method that utilization horizontal type anaerobic reactor processes excess sludge Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
- C02F11/04—Anaerobic treatment; Production of methane by such processes
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- 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
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- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
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Abstract
The invention discloses a kind of method that utilization horizontal type anaerobic reactor processes excess sludge, belong to organic solid waste and process the technical field disposed with residual sludge reduction.The present invention adopts anaerobism horizontal reactor, by the insulation effect of solar sunlight house, the excess sludge that solid content is reached with 20% carries out anaerobic digestion, the reliable guidance of offer is disposed in process for actual sewage treatment plant residual mud, excess sludge after this equipment is processed improves dewatering, and it is effectively reduced pathogenic microorganism, decrease the stink of mud simultaneously.
Description
Technical field
The present invention relates to a kind of method that utilization horizontal type anaerobic reactor processes excess sludge, belong at organic solid waste
Reason disposes the technical field with residual sludge reduction.
Background technology
Excess sludge refers to that sewage treatment plant is processed and produces in preliminary sedimentation tank and two grades, tertiary treatment process during waste water
Precipitating sludge thing, particulate matter and floating thing etc..With the fast development of Chinese society expanding economy and urbanization, town sewage
The quantity of factory and scale are being continuously increased.China's " the light mud of heavy water " problem present in specific resistance to filtration is extremely serious, right
Not, 80% mud does not also obtain stable process to be disposed for the attention of specific resistance to filtration and input.Preresearch estimates " 12
Five ", during, ten thousand tons of wet mud 3500-6000 of 80% moisture content, ten thousand tons of equivalent dewatered sludge about 700-1200 are produced in national annual.
60,000,000 tons will be broken through to the year two thousand twenty sludge yield, being continuously increased of sludge yield brings huge pressure to environmental protection industry (epi).
Anaerobic digestion techniques are one of effective means of specific resistance to filtration, and anaerobic digestion can reduce sludge volume, surely
Determine sludge quality, improve the dehydrating effect of mud, reduce mud stench, improve the hygienic quality of mud.Traditional sludge wet type disappears
In change, moisture percentage in sewage sludge is up to 95%, produces reluctant biogas slurry in a large number, simultaneously because reaction system contain substantial amounts of water to
Temperature-increasing system brings very big difficulty, and big but effective digestion power that taken up space during process is low.The digestion of mud high solid-state overcomes
The deficiency that traditional anaerobism is disposed, improves the treating capacity of unit Organic substance, improves digestive efficiency, greatly reduce biogas slurry simultaneously
Yield.But traditional vertical slaking apparatus there is also certain deficiency, because the viscosity of mud and density are larger, anaerobism
During process, mud is easily deposited in bottom, causes local to be acidified, and mass-and heat-transfer is obstructed, and fermentation rate is slower etc..
Content of the invention
In order to solve the above problems, the invention provides a kind of excess sludge processing meanss and provide a kind of using horizontal
The method that anaerobic reactor processes excess sludge, efficiently avoid asking of the deficiency of process mud that vertical reactor exists
Topic.The present invention is using the horizontal reactor with pulling flow type agitating device, the excess sludge of anaerobic digestion solid content 20%.
First purpose of the present invention is to provide a kind of excess sludge processing meanss, and described excess sludge processing meanss are main
It is dehydrated dress including feed arrangement, horizontal type anaerobic reaction unit, collecting methane and purifier, warming solar energy device and biogas residue
Put；Described warming solar energy device is arranged on horizontal type anaerobic reaction unit outer layer；Feed arrangement and horizontal type anaerobic reaction unit
Charging aperture connects, and sludge gas collecting device is connected with horizontal type anaerobic reaction unit.
In one embodiment, described feed arrangement is conveying worm.
In one embodiment, the generally Horizontal cylinder body of horizontal type anaerobic reaction unit, lateral diameters are long with tank body
Degree ratio is 1:5.
In one embodiment, the dischargeable capacity of horizontal type anaerobic reaction unit is 40m3.
In one embodiment, the volume of described horizontal reacting device is 50m3.
In one embodiment, carry pulling flow type agitating device in described horizontal type anaerobic reaction unit.
In one embodiment, described warming solar energy device is the sunlight board with ultraviolet-absorbing film, using temperature
Reactor temperature can be improved 8 DEG C -10 DEG C by the insulation effect of room.
In one embodiment, the mud extraction of described horizontal type anaerobic reaction unit adopts pneumatic diaphragm pump mud extraction；Biogas is received
Collect the biogas film made using HDPE material, and draught fan matching and torch are it is ensured that the stable operation of device.
Second object of the present invention is to provide a kind of method processing excess sludge, is the excess sludge using the present invention
Processing meanss.
Methods described is that using horizontal reactor, the excess sludge of solid content 20% is carried out Anaerobic Digestion.
In one embodiment, the pH of described excess sludge be 7.2～8.0, TS 18～22%, VS/TS 55～
60%th, ammonia nitrogen 20～26mg/kg, total carbon 135～160g/kg, total nitrogen 25～30g/kg, carbon-nitrogen ratio 5.0～5.5.
In one embodiment, the pH of described excess sludge is 7.6, TS 20%, VS/TS 55～60%, ammonia nitrogen
23.15mg/kg, total carbon 148.63g/kg, total nitrogen 27.84g/kg, carbon-nitrogen ratio 5.3.
In one embodiment, described horizontal type anaerobic reaction unit carries out when starting adding by the way of continuous feed
Material, enters 10 tons of excess sludge on the 1st day, feeds 1 ton daily later, completes to feed, feeds 40 tons altogether, volume is stood for 35 in 1 month
Side, does not add methane phase strain；Regularly it is stirred daily after completing charging, speed of agitator is 5r/min, the detesting of start-up course
Oxygen digestion time is 73d.
Beneficial effects of the present invention：
(1) horizontal reactor is generally used for food fermentation industry, the present invention to the length-width ratio of traditional horizontal reactor and
Heat preserving mode is improved.The length-width ratio of horizontal reactor is increased to 5 by the present invention:1, it is longer that this structure makes mud have
Digestion is along journey thus obtaining more preferable digestion effect.The present invention is also taken newly to lagging facility in addition to using horizontal reactor
Design, by building solar energy greenhouse glass sunlight house as the heating protection device of reactor, play the good result of energy saving temperature controlling,
With channel-section steel and angle steel as skeleton, surrounding is sealed glass sunlight house with PC undaform sunlight board, plays good temperature raising and maintaining effect.
(2) present invention is directed to the excess sludge of solid content 20%, carries out Anaerobic Digestion using horizontal reactor.Take
The mode of continuous feed, carries out the operation of reactor by warming solar energy system, and through the operation of 3 months, mud produced biogas
Rate reaches 274mL/gVS, and methane content reaches 46% for 58%, VS conversion ratio, and protein and polysaccharide degradation rate are respectively
36.7% and 30.1%, in digestion process, VFA content maximum is 2395mg/kg, and maximum occurs in the 42nd day.Digestion process
Middle ammonia nitrogen concentration is slowly increased always, maximum about 124.3mg/kg.
Brief description
Fig. 1 is reactor assembly schematic diagram；
Fig. 2 is in a few days difference variation；
Fig. 3 is the change of temperature in digestion process；
Fig. 4 is gas production and the change of methane content；
Fig. 5 is the situation of change of VFA in anaerobic digestion；
Fig. 6 is the situation of change of ammonia nitrogen in anaerobic digestion process；
Fig. 7 is the change of VS conversion ratio in anaerobic digestion；
Fig. 8 is the change of protein in digestion process；
Fig. 9 is the change of polyoses content；
Above-mentioned in figure reactor is evenly distributed 4 sample taps by along journey, respectively No. 1, No. 2, No. 3 and No. 4 sample taps, point
Not Yong R1, R2, R3 and R4 represent.
Specific embodiment：
Implement row 1
Excess sludge is sewage treatment plant's belt filter press mud extraction, and sludge quality is shown in Table 1.
Table 1 excess sludge property
The excess sludge processing meanss that the present invention adopts, mainly include feed arrangement, horizontal type anaerobic reaction unit, biogas receipts
Collection and purifier, warming solar energy device and biogas residue dehydration device；It is anti-that described warming solar energy device is arranged on horizontal type anaerobic
Answer device outer layer；Feed arrangement is connected with the charging aperture of horizontal type anaerobic reaction unit, and sludge gas collecting device is reacted with horizontal type anaerobic
Device is connected.Horizontal type anaerobic reaction unit (i.e. reactor) designs outward and is mounted with corollary equipment, is with ultraviolet-absorbing film
Sunlight board, reactor temperature can be improved 8 DEG C -10 DEG C by the insulation effect using greenhouse.Device charging is using helical feed dress
Put charging, tank body mud extraction adopts pneumatic diaphragm pump mud extraction.The biogas film that collecting methane is made using HDPE material, and draught fan matching
With torch it is ensured that the stable operation of device.Reactor dischargeable capacity is 40m3, reactor generally Horizontal cylinder body, side is straight
Footpath and length of tank ratio are 1:5.
The present invention is directed to the excess sludge of solid content 20%, carries out Anaerobic Digestion (Fig. 1) using horizontal reactor.Adopt
Take the mode of continuous feed, carry out the operation of reactor by warming solar energy system, through the operation of 3 months, mud produced natural pond
Gas rate reaches 274mL/gVS, and methane content reaches 46% for 58%, VS conversion ratio, and protein and polysaccharide degradation rate are respectively
36.7% and 30.1%, in digestion process, VFA content maximum is 2395mg/kg, and maximum occurs in the 42nd day.Digestion process
Middle ammonia nitrogen concentration is slowly increased always, maximum about 124.3mg/kg.Reactor is along the VS of 4 sample tap mud of journey, protein
Assume obvious diversity with polysaccharide degradation rate, in reactor, the degradation rate of mud residing becomes positive correlation along journey distance with it.
By building solar energy greenhouse device, play the effect improving and stablizing reactor temperature, reactor temperature is warm than outdoor
Degree can improve 10 DEG C about, can be by the undulated control of reactor temperature at 4 DEG C -5 DEG C.The running gear of the present invention mainly divides
For feed arrangement, horizontal type anaerobic reaction unit, collecting methane and purifier, warming solar energy device and biogas residue dehydration device
Deng.Excess sludge enters in storage tank, is transported to certain altitude by elevator, enters from top in the presence of conveying worm
Enter in anaerobic fermentation tank, fermentation tank is horizontal type anaerobic fermentation tank, can automatically monitor pressure, flow and liquid level etc., can supervise in real time
Control.
The biogas that anaerobic fermentation produces is collected after dehydration and desulfurizing and purifying and utilizes.It is provided with biogas residue discharging dress
Put, biogas residue is dehydrated by plate type pressure filter.In order to realize reactor whole year stable operation, overcome under winter or low temperature condition
The low problem of reaction efficiency, devises warming solar energy facility, can maintain the annual stable operation of reactor.Horizontal reacting device
Volume be 50m3.Fed by the way of continuous feed during reactor start-up, entered 10 tons of excess sludge within the 1st day, after
1 ton of charging daily, completes in 1 month to feed, feeds 40 tons altogether, volume is 35 cubes, does not add methane phase strain.Complete to feed
Regularly it is stirred daily afterwards, speed of agitator is 5r/min, the anaerobic digestion time of start-up course is 73d.
Implement row 2：The insulation situation to reactor for the greenhouse
Temperature is one of key factor of impact anaerobic digestion effect, and different temperature corresponds to specific methane phase group,
The temperature fluctuation of anaerobic digestion can not be too big, otherwise can affect the stability of methane phase effect.For investigating operation phase solar energy
The temperature control effect in greenhouse, have recorded in reactor, in greenhouse booth and outdoor temperature variations, analyzes April No. 20 one
The situation of change (Fig. 2) of temperature in it；Have recorded the data (Fig. 3) of 73 days temperature changes since the bottom of three months simultaneously.From Fig. 2
Understand that greenhouse temperature of shed substantially exceeds outdoor 10-12 DEG C, reactor temperature exceeds outdoor 6-9 DEG C, and reactor temperature
More stable, temperature fluctuation amplitude is little, 26 DEG C of minimum temperature, 33.5 DEG C of maximum temperature, and the reactor temperature difference is 7.5 DEG C, greenhouse booth
Interior temperature fluctuation is larger, 38.2 DEG C of maximum temperature, 25.4 DEG C of minimum temperature, and the temperature difference is 12.8 DEG C, and outside greenhouse maximum temperature 24.7
DEG C, 17.5 DEG C of minimum temperature outside greenhouse, the temperature difference reaches 7.4 DEG C.This show greenhouse not only reactor is had good heat effect,
And the stability of its temperature is played a role.
Fig. 3 is the situation of temperature change in continuous 73 days, three inside and outside in early stage reactor and greenhouse at temperature all in
Low temperature, is 10.2 DEG C respectively, 15.1 DEG C and 11 DEG C.At three inside and outside in late reactor and greenhouse, temperature is in maximum temperature,
It is respectively 30.8 DEG C, 41.2 DEG C and 37.2 DEG C.When early stage outdoor temperature is minimum, canopy internal-external temperature difference is less, and the temperature difference is 4.9 DEG C, in tank
Temperature and only 0.8 DEG C of outdoor temperature difference, and to the later stage, when outdoor temperature highest, greenhouse inside and outside temperature difference is 10.4 DEG C, instead
Answer in device and outdoor temperature difference is 6.8 DEG C, it can thus be seen that when outdoor temperature is higher, greenhouse internal-external temperature difference is bigger, temperature
Room to heat effect better.The second half section indoor/outdoor temperature-difference of start-up course is higher than reaction front half section.
Implement row 3：The aerogenesis situation of mud in reactor running
Fig. 4 produces the change curve of methane quantity and methane content for fermentation tank, knowable to figure, reacts starting stage, reactor
Interior aerogenesis DeGrain, but constantly carrying out with reaction, reactor daily output tolerance is constantly lifted, the speedup of initial stage daily gas
Relatively slow, at the 25-55 days, reactor gas production was obviously improved, and daily output tolerance is from 3.9m3Bring up to rapidly 16m3, contrast Fig. 3,
Temperature in this period reactor rises to 35 DEG C from 25 DEG C, and gas production and temperature all improve rapidly, and the rising of temperature is significantly
Improve the activity of methanogen, improve digestive efficiency, when temperature of reactor reaches 35 DEG C, be conducive to the anaeration in normal temperature of mud
Digestion.At the 55-65 days, reactor gas production rate maintained a higher level, and to after the 60th day, gas production has declined,
This is utilized mainly due to substrate most of in reactor, has not had the Organic substance of abundance to maintain higher anaerobism in system
Digestion rate, by the 73rd day, in reactor, every gram of VS cumulative gas of mud was 274mL.During 25 DEG C about of outdoor temperature, greenhouse
Interior temperature substantially exceeds outdoor 10 DEG C about, and reactor temperature exceeds outdoor 7-8 DEG C, and the raising with outdoor temperature is described, temperature
The temperature rise effect of room is become better and better.Understand that starting stage produced methane in sewage gas amount is less from the situation of in figure methane change, front
It is kept within 45 days a relatively low state, improve constantly and reach within 45-60 days maximum 58%, be kept at afterwards
Between 40%-55%, gas production after corresponding 65 days, aerogenesis first peak one week after in gas methane content peak.
Carrying out from product methane quantity and methane content analysis shows reactor anaerobic sludge digestion.
Implement row 4：The situation of change of mud VFA content in reactor running
In anaerobic fermentation process, Organic substance is progressively volatile fatty acid (VFA) by microorganism conversion, and VFA can be used as product
The substrate of methane backeria, is acted on by own metabolism and generates methane.But the VFA of higher concentration can cause fermentation system acidifying, pH value
Reduce, microbial metabolism is stagnated, lead to sweat failure, Fig. 5 is 4 sample tap mud VFA of startup stage fermentation tank
Situation of change, as can be seen from the figure VFA initial content is relatively low, and the 1st day to the 15th day, the content of VFA rapidly increased to
1500mg/kg, in this stage, Organic substance is decomposed into rapidly organic acid, and from the 15th day to the 42nd day, VFA concentration slowly rose,
Maximum 2395mg/kg is reached, VFA concentration was slow from the 15th day to the 43rd day rises although this elementary reaction when the 42nd day
Device temperature improves constantly, but advancing the speed and unhappy of VFA content, it is the speed that methanogen utilizes organic acid the reason possible
Improve constantly, the concentration to the 40th day organic acid begins to decline, be gradually lowered after fluctuation at the 40 to 55th day, 60 to 74
My god, the amount of organic acid also reduces gradually, reduces to 1800mg/kg in the 73rd day VFA content, because mud is through 2 in tank
After the digestion of individual month, the content of Organic substance is relatively low, does not have enough substrates to supply methanogen metabolism, causes gas production to reduce.
Comparative reactor along the VFA concentration of the taken mud of Cheng Si sample tap, due in reactor agitator stirrer paddle have certain
Angle of inclination, and reactor feed shared about 30 days, mud in reactor can be had plug-flow to act in charging, four groups of data
Variation tendency is almost identical.
Implement row 5：The situation of the change of ammonia nitrogen in reactor running
Fig. 6 is the situation of change of ammonia nitrogen in start-up course, and as can be seen from the figure ammonia nitrogen concentration is from the beginning by the 60th day
All in the trend rising, increase to 124.3mg/kg, the ratio rear 30 of advancing the speed of first 30 days ammonia nitrogens from the 49.9mg/kg starting
Faster, with the carrying out of digestion reaction, itrogenous organic substance is degraded it speed in a large number, and system discharges a large amount of ammonia nitrogens, produces meanwhile
Methane backeria increased activity, is more than yield to sour degradation rate, and ammonia nitrogen concentration is in integrally the trend rising.4 sample tap dirts
Mud ammonia-nitrogen content integrally assumes diversity, and No. 4 mouth mud ammonia nitrogen concentrations concentration in change procedure is above other several groups, and 1
Number mud ammonia-nitrogen content is minimum, and the plug-flow effect that this is possibly due to reactor stirring makes the different mud along journey have different disappearing
The change time, No. 4 mouth sludge digestion times are the longest, and No. 1 mouth sludge digestion time is the shortest, and in the longer mud of digestion time, ammonia nitrogen amount is tired out
Long-pending more, so No. 4 mud ammonia nitrogen values are higher than other several groups.
Implement row 6：The situation of change of VS in reactor running
Fig. 7 is the situation of change of 4 sample tap mud VS during reactor start-up.Reaction 4 sample tap mud of early stage
VS does not almost change significantly, and VS conversion ratio brings up to 10% about by 5% within first 20 days, and by the 20th day, VS content was about
10.2%, the conversion rate starting VS from the 30th day is substantially accelerated, and conversion ratio brought up to about 38.5% from 10%, to the 73rd day VS
It is worth for 7%, now VS/TS is about 35.7%, and contrast Fig. 3 understands, the reason early stage speed is relatively low, and later stage speed is higher, this
It is because that one side reactor feed adopts excess sludge as digestion substrate completely, do not inoculate anaerobic sludge, on the other hand
The digestion temperature in later stage improves 10 DEG C about than early stage, and the temperature in later stage is more beneficial for the anaerobic digestion of mud.Relatively 4 samplings
The conversion ratio of mouthful mud VS, No. 4 sample tap mud VS degradation rate initial values are more than No. 1 mud, this be due to No. 4 sample taps near
The time of staying of mud is more than the mud near No. 1 sample tap.It is bright that this makes the VS conversion ratio of the taken mud of 4 sample taps present
Aobvious diversity.
Implement row 7：The situation of change of protein content in reactor running
What Fig. 8 reflected is the variation tendency of protein in mud, and with the increase of digestion time, in mud, protein contains
Amount constantly reduces, and is reduced to the 269mg/kg of the 73rd day from initial 425mg/kg, degradation rate is about 36.7%.Wherein from the 20th
By the 60th day, the degradation rate of protein was the fastest, and degradation rate is the 65% of total degradation amount, and this is primarily due to suitable temperature and carries
The high digestion effect of mud.Contrast 4 groups of mud situations of change, the sludge protein content of No. 4 mouths is bright during digestion
Show and be less than other several groups, this is because the mud near No. 4 experienced longer digestion compared with other several groups prolongs journey, No. 4 sample taps
The digestion time of mud is more than the mud of No. 3 sample taps.The sludge digestion time of No. 3 sample taps is more than No. 2 and No. 1 sample tap dirt
Mud, its protein content is also lower compared with No. 2 and No. 1.
Implement row 8：The situation of change of polyoses content in reactor running
Fig. 9 reflection is the change respectively prolonging polyoses content in journey mud in digestion process, compares Fig. 8 Fig. 9, the two change having
Change trend is more similar, illustrates that protein and polysaccharide are all the Organic substances that can be degraded in anaerobic digestion, polysaccharide concentration is opened from one
The 315mg/kg beginning is reduced to the 220mg/kg of the 73rd day, and degradation rate has reached 30.1%, the slightly below degradation rate of protein, this
It is because that in excess sludge, total protein is more, the utilization ratio in digestion process is higher.
Claims (10)
1. a kind of excess sludge processing meanss are it is characterised in that described excess sludge processing meanss mainly include feed arrangement, crouch
Formula anaerobic reaction device, collecting methane and purifier, warming solar energy device and biogas residue dehydration device；Described warming solar energy
Device is arranged on horizontal type anaerobic reaction unit outer layer；Feed arrangement is connected with the charging aperture of horizontal type anaerobic reaction unit, and biogas is received
Acquisition means are connected with horizontal type anaerobic reaction unit.
2. excess sludge processing meanss according to claim 1 are it is characterised in that the reactor of horizontal type anaerobic reaction unit
Generally Horizontal cylinder body, lateral diameters and length of tank ratio are 1:5.
3. excess sludge processing meanss according to claim 1 are it is characterised in that carry in described horizontal type anaerobic reaction unit
There is pulling flow type agitating device.
4. excess sludge processing meanss according to claim 1 are it is characterised in that described feed arrangement is helical feed
Machine.
5. excess sludge processing meanss according to claim 1 are it is characterised in that effective appearance of horizontal type anaerobic reaction unit
Amass as 40m3.
6. excess sludge processing meanss according to claim 1 it is characterised in that described warming solar energy device be with
The sunlight board of ultraviolet-absorbing film, reactor temperature can be improved 8 DEG C -10 DEG C by the insulation effect using greenhouse.
7. a kind of method processing excess sludge, is to be carried out using the arbitrary described excess sludge processing meanss of claim 1～6
Process.
8. method according to claim 7 it is characterised in that the pH of described excess sludge be 7.2～8.0, TS 18～
22%th, VS/TS 55～60%, ammonia nitrogen 20～26mg/kg, total carbon 135～160g/kg, total nitrogen 25～30g/kg, carbon-nitrogen ratio 5.0
～5.5.
9. method according to claim 7 is it is characterised in that methods described is to adopt the excess sludge of solid content 20%
Horizontal reactor carries out Anaerobic Digestion.
10. method according to claim 7 is it is characterised in that adopt continuous when described horizontal type anaerobic reaction unit starts
The mode of charging is fed, and enters 10 tons of excess sludge within the 1st day, feeds 1 ton daily later, completes to feed, feed altogether in 1 month
40 tons, volume is 35 cubes, does not add methane phase strain；Regularly it is stirred daily after completing charging, speed of agitator is 5r/
Min, the anaerobic digestion time of start-up course is 73d.
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| CN107032576A (en) * | 2017-05-27 | 2017-08-11 | 江南大学 | A kind of use horizontal type anaerobic reactor handles the operation method of excess sludge |
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| CN1812936A (en) * | 2003-06-24 | 2006-08-02 | 埃尔加利亚公司 | Method for anaerobic sludge digestion and a digester |
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| CN107032576A (en) * | 2017-05-27 | 2017-08-11 | 江南大学 | A kind of use horizontal type anaerobic reactor handles the operation method of excess sludge |
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