CN104529112B - Sludge organism drying method for treating - Google Patents
Sludge organism drying method for treating Download PDFInfo
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- CN104529112B CN104529112B CN201410700581.XA CN201410700581A CN104529112B CN 104529112 B CN104529112 B CN 104529112B CN 201410700581 A CN201410700581 A CN 201410700581A CN 104529112 B CN104529112 B CN 104529112B
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- 238000001035 drying Methods 0.000 title claims abstract description 62
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- 238000000855 fermentation Methods 0.000 claims abstract description 27
- 230000004151 fermentation Effects 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 25
- 238000010564 aerobic fermentation Methods 0.000 claims abstract description 11
- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- 239000002689 soil Substances 0.000 claims abstract description 6
- 230000001502 supplementing effect Effects 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 71
- 239000000203 mixture Substances 0.000 claims description 43
- 241000894006 Bacteria Species 0.000 claims description 20
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- 238000009423 ventilation Methods 0.000 claims description 10
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- 239000010902 straw Substances 0.000 claims description 6
- 241001446247 uncultured actinomycete Species 0.000 claims description 6
- 241000193375 Bacillus alcalophilus Species 0.000 claims description 5
- 240000004808 Saccharomyces cerevisiae Species 0.000 claims description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 4
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 24
- 238000001704 evaporation Methods 0.000 abstract description 13
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Classifications
-
- 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
-
- 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
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/02—Odour removal or prevention of malodour
Abstract
The present invention is a kind of sludge organism drying method for treating using microbial fermentation desiccation, solves the technical problems such as existing sludge drying power consumption is high and environmental pollution is more serious.It is that the fresh sludge that concentrated treated moisture content is 76%~84% carries out drying and other treatment process, it includes following steps: a, allotment fresh sludge moisture content；B, microbial inoculum is added；C, the fermentation, desiccation of sludge.Dewatered sludge after the drying and other treatment can be used for supplementing the various aspects such as soil.The present invention is to take full advantage of the biological energy source of sludge itself using microorganism aerobic fermentation heat production come the biological dewatered technique of evaporation water, is the drying technique of a kind of economy, energy-saving and environmental protection；It improves drying efficiency, shorten drying cycle.
Description
Technical field
The present invention relates to sewage treatment product, that is, sludge processing techniques, especially sludge organism drying method for treating.
Background technique
A large amount of sludge is generated through process procedures such as primary sedimentation pond, secondary sedimentation tanks when town domestic sewage processing.One
As in the case of the sludge yield (based on moisture content 80%) of every ten thousand tons of sewage after processing be about 6~8 tons.The sludge generates evil
Stink, and contain a large amount of heavy metal element (such as Cd, Hg, As, Pb, Ni, Cr, Cu), harmful organic substance (such as benzo
Pyrene, Polychlorinated biphenyls) and the harmful bacterias such as fecal coliform and roundworm egg, town environment pollution is constituted and is seriously threatened.
Sludge treatment is broadly divided at present: sanitary landfills, compost land use, lime solidification landfill, anaerobism producing methane
With anhydration and incineration etc..Since municipal sludge moisture content is higher, it is still up to 80% or so after concentrated dehydration, there is volume greatly, no
Conducive to transport, property is unstable the features such as." landfill " will occupy a large amount of soils, at the same can also generate percolate and impurely under
Water；" land use " then because freight volume is big, difficulties in dispersion, be easy polluted underground water due to be restricted；" compost land use " because
The heavy metal unstability of sludge is difficult to Rational Application；" burning " causes calorific value too low because solid content is low, is unable to maintain that effectively
Spontaneous combustion and expend a large amount of auxiliary fuels, obviously increase cost of disposal.Therefore the drying and other treatment of sludge is sludge resource disposition
Important link.
Sludge is deposited in outdoor drying bed in the progress of sludge drying bed by traditional sludge drying, by naturally logical
Wind and gravity carry out desiccation to sludge.Current drying process is mainly heat drying and mechanical desiccation, that is, passes through external heat
Moisture in sludge is evaporated and is squeezed by source, power supply and relevant mechanical equipment.The former takes up a large area, low efficiency；The latter throws
Money and operating cost height, equipment operation energy consumption are high.Although the domestic and international technique for carrying out sludge drying to heat drying at this stage exists
It continuously improves, as optimized heat source, reduction processing step, optimizing parameter at fortune, but the characteristic of its technique itself (utilizes external heat
Source) determine that its drying process energy consumption is higher.
Summary of the invention
The present invention be solve existing sludge drying (heat drying) power consumption is high, at high cost, land occupation extensively, in drying process to environment
The technical problems such as more serious are polluted, and then a kind of sludge organism drying and other treatment technology using microbial fermentation desiccation is provided.
Sludge organism drying method for treating of the invention, be concentrated treated moisture content be 76%~84% it is fresh
Sludge carries out drying and other treatment process, it includes following steps:
A, it deploys fresh sludge moisture content: the base-material that fresh sludge and moisture content are 28%~32% is pressed 1: 1.4~1.6
Weight ratio is stirred mixing, obtains mixture；
B, it adds microbial inoculum: the compound of 2.0 ‰~the 2.5 ‰ of mixture weight being added into the resulting mixture of step a
Microbial inoculum is simultaneously mixed thoroughly, is obtained to desiccation material；
C, the fermentation, desiccation of sludge: by step b it is resulting to desiccation material heap at fermentation desiccation mud heap fermented, desiccation,
Obtain dewatered sludge；
Wherein, which is Bacterial Complex, by bacillus alcalophilus, thermophilic actinomycete, thermotolerant yeast bacterium, deodorization bacterium
It is mixed by the weight ratio of 6:6:5:3.
Further, the carbon-nitrogen mass ratio in the mixture is 24~26: 1.
Further, which is to pass through addition auxiliary material in step a and stir evenly to realize；The auxiliary material is
The high stalk of phosphorus content, straw or straw or like vegetable.
Further, the moisture content of the dewatered sludge is 28%~32%.
Further, which overthrows once daily, and fermentation, drying time are 10~12 days.
Further, which selects dewatered sludge.
Further, being stirred in above-mentioned steps a is carried out in closed negative pressure space；The closed negative pressure space
Equipped with deodoration system；The deodoration system is for being handled and being discharged generated foul smell in closed negative pressure space.
Further, above-mentioned steps b, c are carried out in sludge organism desiccation slot；Sludge organism desiccation slot setting exists
In aerobic fermentation workshop；Its slot bottom is equipped with aerating system, and slot tail is equipped with deodorization extractor fan；The aerating system is used for biology
Desiccation slot carries out discontinuous forced ventilation, so that the aerobic fermentation strain in Bacterial Complex is preferably fermented.
It is of the invention a kind of by sludge organism drying method for treating treated dewatered sludge, for supplementing soil or using
In production brick body raw material or for the energy of energy production.
Base-material is added in the present invention to adjust the moisture content to drying and other treatment sludge to 46%~54%, is conducive to strain
Growth and sludge fermentation desiccation.
Base-material of the invention is gathered materials on the spot using the dewatered sludge after drying and other treatment, is reduced because excavating, conveyer belt comes
Labour cost, cost, improve the utilization rate of equipment, and avoid simultaneously dirty because excavating environment brought by the base-materials such as loess
Dye.
The present invention is conducive to shorten the sludge drying time, be improved using the proportion between reasonable fresh sludge and base-material
Efficiency of sludge treatment.
The carbon-nitrogen ratio in sludge is adjusted by the high substance of addition containing cellulose in the present invention, is conducive to microorganism to having
The decomposition of machine object removes harmful substance, and generates thermal energy, promotes the quick desiccation of sludge.Carbon-nitrogen ratio after the theoretical analysis with
Required value is quite (carbon-nitrogen ratio is generally 25:1).The reason is that about being needed when assimilating 5 parts of carbon when microorganism decomposition organic matter
Assimilate 1 part of nitrogen to constitute own cell body, because the carbon-nitrogen ratio of microorganism itself is about 5:1.And (benefit is absorbed in assimilation
With) 1 part of carbon when need to consume 4 parts of organic carbons and obtain energy, so microorganism needs to consume when 1 part of nitrogen is absorbed and utilized utilizes 25
Part organic carbon.That is, 25:1 of the microorganism to the carbon-nitrogen ratio of the proper decomposition of organic matter.When being lower than its required value, go forward side by side
One step selects the higher auxiliary material of containing cellulose with supplementary carbon source.Therefore, it is played by the advantageous Bacterial Complex of addition auxiliary material more preferable
Ground effect, while accelerating the desiccation of sludge.
The present invention also has the advantage that compared with existing sludge drying process to be sent out due to the present invention using microorganism aerobic
Ferment heat production carrys out the biological dewatered technique of evaporation water, takes full advantage of the biological energy source of sludge itself, except electricity needed for ventilation aeration
Consumption is outer, does not have to external heat source, therefore is the drying technique of a kind of economy, energy-saving and environmental protection.Pressure drum is carried out by treating desiccation material
Wind.It improves drying efficiency, shorten drying cycle.Specifically relatively please refer to the following table 1.
1. heat drying of table, natural desiccation are compared with biological dewatered
Drawing explanation
Fig. 1 is the mixture desiccation temperature changing curve diagram for listed different formulations in table 2；
Fig. 2 is influence curve figure of the thallus to sludge drying.
Experimental analysis
1, base-material and its proportion
Be added base-material be mainly used for adjusting fresh sludge (sewage treatment plant directly generate and concentrated that treated is dirty
Mud) moisture content.The moisture content of treated fresh sludge generate under normal circumstances from sewage treatment plant and concentrated is 76%
~84% (i.e. 80% or so), in order to facilitate operation, and guarantees the growth of bacteria agent, aqueous to adjust its by the way that base-material is added
Rate.
Raw material: sludge of sewage treatment plant, moisture content 80% fresh sludge: are used.
Base-material: selection dewatered sludge (note: using the suitable substitute of moisture content for the first time,
Such as loess), it is product after sludge organism desiccation, moisture content 30%.
Above two raw material is deployed in the case where being added without bacteria agent by 2 requirement of table, each " project "
Into four desiccation slots, the temperature change for detecting different times mixture is simultaneously compared the agitated uniformly rear heap respectively of mixture
Compared with.
2. fresh sludge of table and base-material match
From table 2 and Fig. 1 is combined as it can be seen that formula A is because moisture content is higher, and temperature changes minimum over time, matches
Square D temperature change is maximum.Formula C, D are suitable as biological dewatered formula, and formula D effect is best.Consider from practical application angle,
2 times for being fresh sludge due to being formulated base-material usage amount in D, volume is double after mixing, increases the burden of biological dewatered slot, makes
Obtaining fresh sludge handling rate reduces；Comprehensively consider in terms of temperature change and base-material usage amount two, formula C is most reasonably to match
Than being conducive to the desiccation of sludge.
Same amount sludge is mixed with not same amount base-material by upper table 2, the sludge drying slot being respectively put under identical conditions is gone forward side by side
Row nature desiccation, to study the biological dewatered moisture content change situation of different formulations in the same period.Referring to table 3, listed by table 3
Data are the moisture content that the mixture of different proportion formula was measured by sampling at desiccation the 11st day.As seen from Table 3, formula C and
The water evaporation quantity for being formulated D is most, and being formulated moisture content of the C at desiccation the 11st day is 31%, and formula D is 29%.
Table 3: the biological dewatered moisture content change of different formulations material compares
| Title | It is formulated A | It is formulated B | It is formulated C | It is formulated D |
| Biological dewatered preceding water content | 59.4% | 55% | 50% | 46.7% |
| Water content after biological dewatered 11 days | 45% | 38% | 31% | 29% |
| Evaporation water amount | 14.5% | 17% | 19% | 17.7% |
It can be seen that: 1, it fresh sludge desiccation after as base-material again with fresh sludge mixes and carries out biological dewatered being feasible
's；2, fresh sludge and base-material optimization formula are weight ratio 1:1.4~1.6；3, due to it is biological dewatered be a biological activity
Process, it is therefore desirable to suitable carbon-nitrogen ratio, if being recycled for multiple times after sludge drying as base-material, may cause carbon source stream
It loses, is considered as adding the auxiliary material of some high cellulose contents in each mixed process, be used for supplementary carbon source, the additive amount of auxiliary material
Between 5%-8%.
2, the selection and proportion of microbial inoculum
1., the screening test of microbial bacterial agent.
Microbial inoculum: the compound of a variety of strain culturings provided by China Agricultural University's agricultural biological preparation Pilot Base is selected
Microbial inoculum, the Bacterial Complex include four kinds of bacillus alcalophilus, thermophilic actinomycete, thermotolerant yeast bacterium, deodorization bacterium bacterium.Wherein
The minimum growth temperature of bacillus alcalophilus is 28 DEG C, and 70~77 DEG C of maximum growth temperature, optimum growth and breeding temperature is 56
~65 DEG C.The growth suitable temperature of thermophilic actinomycete is 57 DEG C~60 DEG C；Sporogenic suitable temperature is 55 DEG C, 37 DEG C.Resistance to height
Warm saccharomycete optimum growth temperature, in biological dewatered initial stage mass propagation, plays heating generally between 20 DEG C~40 DEG C
With the effect for adjusting pH value.The deodorization bacterium is combined by 2 plants of aerobic deodorization bacterium.Different ratios is pressed using above-mentioned four kinds of bacterium
The Bacterial Complex that example is prepared, i.e. microbial inoculum I, microbial inoculum II, microbial inoculum III and microbial inoculum IV, specific proportion is referring to table 4.
Table 4: the proportion (weight ratio) of Bacterial Complex
Sludge: sewage treatment plants are concentrated treated fresh sludge, water content is 80% or so.
Test method: after the ratio of fresh sludge and base-material with weight ratio for 1:1.5 is stirred mixing, 4 are built up
The consistent four heap bodies of size, shape, weight, 10 tons of each heap body.Then by four kinds of bacteria agents in 2 ‰ ratio (weight
Than in terms of fresh sludge and base-material total amount) uniform stirring is into corresponding four heap bodies.Observation temperature change daily, is examined simultaneously
The variation of heap body moisture content is surveyed, draws change curve, as shown in Figure 2.
From figure 2 it can be seen that four heap bodies that different microbial inoculum processing are added, progress temperature measurement in continuous 11 days, place
The heap body quick heating of reason 1 and processing 4, temperature change is larger, and handle 1 and the heap temperature of processing 2 when being increased to 52 DEG C almost
Do not rising.It handles 3 and handles 4 and be compared, preferably, the raising of same time temperature is most fast for processing 4, can quickly evaporate in heap body
Moisture is optimal bacteria agent for biological dewatered.
When in above-mentioned experiment through biological dewatered 11 days, the material of each heap body is taken to carry out water content detection, different bacterium respectively
Agent generates the case where heat evaporates moisture such as table 4.
Table 5: comparison of the different microbial inoculums to heap body water evaporation quantity
| Title | Microbial inoculum I | Microbial inoculum II | Microbial inoculum III | Microbial inoculum IV |
| Biological dewatered preceding moisture content | 50% | 50% | 50% | 50% |
| Biological dewatered 11 days water content | 37% | 34% | 31% | 29% |
| Evaporation water amount | 13% | 16% | 19% | 21% |
As can be seen from Table 5, IV evaporation water amount highest of microbial inoculum, in 11 days biological drying times can by 50% it is aqueous
Amount is reduced to 29%, and dehydration rate has reached 40% or so, goes water effect obvious.Therefore, microbial inoculum of the invention is used by thermophilic
The composite bacteria agent that hot bacillus, thermophilic actinomycete, thermotolerant yeast bacterium, deodorization bacterium mix, the weight ratio between them
As follows: bacillus alcalophilus: thermophilic actinomycete: thermotolerant yeast bacterium: deodorization bacterium is 6:6:5:3.
2., the comparative test of IV additive amount of microbial inoculum
In the actual production process, the usage amount of microbial inoculum is related to the height of cost of disposal, in order to study microbial inoculum usage amount
To the effect of sludge drying water evaporation quantity, we have carried out different usage amount evaporation water effects to above-mentioned selected microbial inoculum IV
Test, drying cycle be 11 days, the results are shown in Table 6.
As can be seen from Table 6, when microbial inoculum usage amount is 2 ‰ or more, water evaporation quantity no significant difference.At consideration
Under the premise of managing cost, the reasonable employment amount of microbial inoculum IV is best between 2 ‰~2.5 ‰ (weight ratios).
Table 6: the comparison that the different usage amounts of microbial inoculum IV evaporate moisture
| Dosage (weight ratio) | Water content before desiccation | Water content after desiccation | Water evaporation quantity |
| 1.5‰ | 50% | 32% | 18% |
| 2‰ | 50% | 29% | 21% |
| 2.5‰ | 50% | 28% | 22% |
| 3‰ | 50% | 28% | 22% |
From above-mentioned each experiment as it can be seen that (1) sludge organism drying technique is using organic during microorganism high-temperature aerobic fermentation
Biological energy source caused by object degradation, cooperation forced ventilation promotes the evaporative removal of moisture, to realize the quick desiccation of sludge.Test
The microbial inoculum IV screened is the Bacterial Complex for collecting four kinds of strain culturings such as mesophile, high temperature bacterium.(2) when microbial inoculum usage amount is 2 ‰
When above, water evaporation quantity no significant difference.Under the premise of considering processing cost, the reasonable employment amount of microbial inoculum IV 2 ‰~
It is best between 2.5 ‰ (weight ratios).(3) since sludge organism desiccation is using organic during microorganism high-temperature aerobic fermentation
Biological energy source caused by object degradation achievees the purpose that evaporation water, therefore to be become according to temperature in heap body in entire drying process
Change situation and be aerated oxygenating in due course, the activity of biomass is allowed to maintain higher level.
Specific embodiment
Embodiment one
Sludge organism drying method for treating of the invention, be concentrated treated moisture content be 76%~84% it is fresh
Sludge carries out drying and other treatment process.In the present embodiment directly from sewage treatment plants learn from else's experience concentration after fresh sludge
3000kg, being detected its moisture content is 80%.The indices of the fresh sludge refer to table 7；In addition to this, wherein also containing
Organic substance and coliform, worm's ovum etc. in large quantities.
Table 7: main harmful substance contents in fresh sludge.
| Title | Mercury (Hg) | Arsenic (As) | Lead (Pb) | Cadmium (Cd) | Chromium (Cr) |
| Content | 0.322 | 10.26 | 60.2 | 1.23 | 82.6 |
The biological drying method for treating of sludge of the present invention includes following steps:
A, fresh sludge moisture content is deployed: the base-material for being 30% with moisture content by the fresh sludge that above-mentioned moisture content is 80%
It is stirred mixing by 1: 1.5 weight ratio, obtains the mixture that moisture content is 50%.Selecting moisture content simultaneously is 30% base-material
4500kg.The base-material preferentially selects sludge drying treated dewatered sludge.For the first time in use, optional water content is suitable
Substance (such as loess or lime-ash) replace sludge drying treated dewatered sludge.Base-material selects loess and ash in the present embodiment
The mixed resin of slag replaces dewatered sludge, mixed resin weight 4500kg, moisture content 30%.The theoretical analysis, fresh sludge
It is 50% with the mixed moisture content of both base-materials.And the carbon-nitrogen mass ratio in mixture is detected simultaneously, and control its carbon nitrogen matter
Ratio is measured between 24~26:1, is conducive to microorganism decomposition organic matter within the scope of the carbon-nitrogen mass ratio, if carbon-nitrogen ratio is excessive,
The decomposition of microorganism is slack-off, is unfavorable for desiccation.Being detected its carbon-nitrogen mass ratio is about 25:1, meets above-mentioned condition.
The fresh sludge 3000kg that above-mentioned moisture content the is 80% base-material 4500kg for being 30% with moisture content is stirred
Mixing is mixed, mixture 7500kg is obtained；The mixture moisture content is 50%；Carbon-nitrogen mass ratio in its content of material is 25:1.
The fresh sludge and being stirred for base-material are that (closed negative pressure space is generally according to blender in closed negative pressure space
Size specification be designed) in mixing process carried out by blender.In the present embodiment fresh sludge and base-material respectively by
Screw conveyor is quantitatively transferred to the mixing plant being located in closed negative pressure space；The closed negative pressure space is equipped with deodoration system, should
Deodoration system discharges after up to standard for handling generated foul smell in closed negative pressure space.In the closed negative pressure space
Qualified discharge after generated foul smell etc. is handled by deodoration system.It is by the blender in mixing plant that fresh sludge and base-material is abundant
Stirring complete its be stirred technique, the mixing time of the blender depending on blender capacity and revolving speed, typically, for
Revolving speed is 100 revs/min of blenders, and mixing time can be 60~90s.Above-mentioned fresh sludge and the agitated machine of base-material stir evenly
Afterwards, mixture is obtained.
B, it adds microbial inoculum: the compound of 2.0 ‰~the 2.5 ‰ of mixture weight being added into the resulting mixture of step a
Microbial inoculum is simultaneously mixed thoroughly, is obtained to desiccation material.Above-mentioned mixture is delivered to sludge organism desiccation slot through material distributing machine.The sludge organism desiccation
Following specification can be used in slot (or mummifying pool): length × width × height is 72m × 4.28m × 2.4m, day handles sludge quantity 200t/d.
The sludge organism desiccation slot is arranged in aerobic fermentation workshop.Its slot bottom is equipped with aerating system, and trough is equipped with turning machine and changes
Rail trolley channel (is used for the operation of turning machine turn trough), and slot tail is equipped with deodorization extractor fan under normal circumstances can be according to biological dewatered
Slot laying item number carries out preparation relevant device.When 10 biological dewatered slots are such as set, 2 turning machines, 2 platforms that switch tracks can be matched
Vehicle, 4 Aeration fans, 10 deodorization blowers.It is delivered in the mixture in sludge organism desiccation slot to by material distributing machine by 2.0 ‰
Bacterial Complex 15kg is added in the ratio of (in terms of the total amount of mixture), which uniformly sprays to the table of mixture
Face, then stirred by turning machine, so that Bacterial Complex uniformly mixes in mixture.It must be to desiccation material about through the above process
7500kg。
C, the fermentation, desiccation of sludge: by step b it is resulting to desiccation material heap at fermentation desiccation mud heap fermented, desiccation,
Obtain dewatered sludge.It is above-mentioned to pile mud heap in sludge organism desiccation slot by pile-turning machine again to desiccation material and carry out fermentation desiccation.Institute's heap
At fermentation desiccation mud heap height be not more than 2m, it is wide be not more than 4m.Then daily by pile-turning machine by the mud heap turning and throwing once and heap
It is in heaps, throwing moving distance is turned over every time and is no less than 6m, and it is that heap moves the mobile process of mixture that this, which turns over throwing process,.The aerating system is used
In carrying out discontinuous forced ventilation to the sludge in biological dewatered slot in sludge fermentation, drying process, so that Bacterial Complex
In aerobic fermentation strain preferably fermented.While the above-mentioned fermentation desiccation mud piled piles up fermentation, desiccation, by being aerated
System carries out interval 3 hours, and (general ventilation time and interval are related with the height of mud heap, in heap for the forced ventilation of ventilation 1 hour
In the case where high 2m, interval can be used 3 hours, divulges information 1 hour) so that the strain of aerobic fermentation is obtained to better fermentation.The exposure
Gas system includes blower, pipeline, valve and control system, and pipe laying is on slot bottom and cell wall.Above-mentioned desiccation to be fermented
Expect the fermentation through 11 days, after desiccation, detect its moisture content and be down to 30%, obtain dewatered sludge about 5340kg.The dewatered sludge realizes dirt
The minimizing of mud.The dewatered sludge is delivered in warehouse for finished product automatically through belt conveyor system, is used with doing it, is such as recycled.Gained
Dewatered sludge has reached related quality criterion through detection.Specific data refer to table 8.
Table 8: the testing result of dewatered sludge.
| Detection project | Quality index | Testing result |
| The mass fraction (to dry in terms of base) of organic matter, % | ≥45 | 58.9 |
| The mass fraction (to dry in terms of base) of nitrogen (N), % | / | 2.46 |
| The mass fraction (to dry in terms of base) of phosphorus (P2O5), % | / | 2.29 |
| The mass fraction (to dry in terms of base) of potassium (K2O), % | / | 2.64 |
| The mass fraction (to dry in terms of base) of total nutrient, % | ≥5 | 7.39 |
| The mass fraction of moisture, % | ≤ 30% | 21.2 |
| PH value, pH | 5.5~8.5 | 7.8 |
| Total arsenic (As) (to dry in terms of base), mg/kg | ≤15 | 4.6 |
| Total mercury (Hg) (to dry in terms of base), mg/kg | ≤2 | 0.074 |
| Total cadmium (Cd) (to dry in terms of base), mg/kg | ≤3 | 0.082 |
| Total lead (Pb) (to dry in terms of base), mg/kg | ≤50 | 26.7 |
| Total chromium (Cr) (to dry in terms of base), mg/kg | ≤150 | 25.3 |
| Induced worm egg death rate, % | ≥95 | 97 |
| Excrement colibacillus group number, a/g | ≤100 | 75 |
Contain various organic substances, various nutrients and energy in above-mentioned resulting dewatered sludge.Can be widely used for
Lower aspect: first is that land use, by sludge organic matter and nutrient add to soil；Second is that passing through anaerobic digestion or burning
Energy in the technologies such as burning recycling sludge；Third is that realizing sludge resource by the lime-ash brickmaking after burning using dewatered sludge
Change.
Embodiment two
Sludge organism drying method for treating of the invention, be concentrated treated moisture content be 76%~84% it is fresh
Sludge carries out drying and other treatment process.In the present embodiment directly from sewage treatment plants learn from else's experience concentration after fresh sludge
5000kg, being detected its moisture content is 82%.The indices of the fresh sludge are roughly the same with upper table 7.Sludge of the present invention
Biological drying method for treating includes following steps:
A, deploy fresh sludge moisture content: by above-mentioned moisture content be 82% fresh sludge 3000kg and moisture content be 30%
Base-material be stirred mixing by 1: 1.6 weight ratio, obtain moisture content be 50% mixture.Selected base-material in the present embodiment
For the dewatered sludge in embodiment one, moisture content 30%, weight 4800kg, the theoretical analysis, fresh sludge and base-material two
The mixed moisture content of person is 50%.And the carbon-nitrogen ratio in mixture is detected simultaneously, detected its carbon-nitrogen mass ratio 22:1, the carbon
Nitrogen mass ratio is unfavorable for microorganism decomposition organic matter.After adding auxiliary material into mixture, comply with standard its carbon-nitrogen ratio.This
Added auxiliary material is the mixture of straw and forage in embodiment.According to principle of gathering materials on the spot, stalk also can be selected.It is added
Auxiliary material granularity is not more than 3mm, and moisture content is 10%~25%.The additive amount of auxiliary material can according to the weight of mixture, measured
The property of carbon-nitrogen mass ratio and auxiliary material determines.
The fresh sludge 3000kg that above-mentioned moisture content the is 82% dewatered sludge 4800kg for being 30% with moisture content is carried out
Stirring, while the auxiliary material that a certain amount of straw and forage is added is stirred mixing, obtains mixture about 7800kg；The mixture contains
Water rate is 50%；Carbon-nitrogen mass ratio in its content of material is in 24~26:1.
The fresh sludge and being stirred for base-material are to carry out mixing process by blender in closed negative pressure space.
The closed negative pressure space is equipped with deodoration system, and generated foul smell etc. is up to standard after being handled by deodoration system in the closed negative pressure space
Discharge.Above-mentioned fresh sludge and the agitated machine of dewatered sludge and auxiliary material after mixing evenly, obtain mixture about 7800kg.
B, it adds microbial inoculum: 2.5 ‰ Bacterial Complex of mixture weight being added into the resulting mixture of step a and mixes
It is even, it obtains to desiccation material.It is delivered in the mixture in sludge organism desiccation slot by 2.5 ‰ to by material distributing machine (with the total of mixture
Meter) ratio Bacterial Complex 19.5kg is added, which uniformly sprays to the surface of mixture, then by turning machine
It is stirred, so that Bacterial Complex uniformly mixes in mixture.It must be to desiccation material about 7800kg through the above process.
C, the fermentation, desiccation of sludge: by step b it is resulting to desiccation material heap at fermentation desiccation mud heap fermented, desiccation,
Obtain dewatered sludge.It is above-mentioned to pile mud heap in sludge organism desiccation slot by pile-turning machine again to desiccation material and carry out fermentation desiccation.Daily
By pile-turning machine, by the mud heap turning and throwing once, simultaneously heap is in heaps.While the above-mentioned fermentation desiccation mud piled piles up fermentation, desiccation, by exposing
Gas system carries out interval 3 hours, and the forced ventilation of ventilation 1 hour is so that the strain of aerobic fermentation is obtained to better fermentation.The exposure
Gas system includes blower, pipeline, valve and control system, and pipe laying is on slot bottom and cell wall.Above-mentioned desiccation to be fermented
Expect the fermentation through 12 days, after desiccation, detect its moisture content and be down to 28%, obtain dewatered sludge about 5400kg.The dewatered sludge realizes dirt
The minimizing of mud.The dewatered sludge is delivered in warehouse for finished product automatically through belt conveyor system, is used with doing it, is such as recycled.Gained
Dewatered sludge has reached related quality criterion through detection.Specific data are close with 8 data of table.
Contain various organic substances, various nutrients and energy in above-mentioned resulting dewatered sludge.It can be widely used for following
Aspect: first is that land use, by sludge organic matter and nutrient add to soil；Second is that passing through anaerobic digestion or burning
Etc. technologies recycling sludge in energy；Third is that realizing recycling sludge by the lime-ash brickmaking after burning using dewatered sludge.
Claims (9)
- It is that the fresh sludge that concentrated treated moisture content is 76%~84% is done 1. sludge organism drying method for treating Change treatment process, it is characterised in that: it includes following steps:A, it deploys fresh sludge moisture content: the base-material that fresh sludge and moisture content are 28%~32% is pressed into 1: 1.4~1.6 weight Than being stirred mixing, mixture is obtained；B, it adds microbial inoculum: 2.0 ‰~2.5 ‰ microbial inoculum of mixture weight being added into the resulting mixture of step a and mixes thoroughly, It obtains to desiccation material；C, the fermentation, desiccation of sludge: by step b it is resulting to desiccation material heap at fermentation desiccation mud heap fermented, desiccation, obtain dry Change sludge；Wherein, the microbial inoculum is Bacterial Complex, by bacillus alcalophilus, thermophilic actinomycete, thermotolerant yeast bacterium, deodorization bacterium It is mixed by the weight ratio of 6:6:5:3.
- 2. sludge organism drying method for treating according to claim 1, it is characterised in that: the carbon nitrogen in the mixture Mass ratio is 24~26: 1.
- 3. sludge organism drying method for treating according to claim 2, it is characterised in that: the carbon-nitrogen mass ratio be Pass through addition auxiliary material in step a and stirs evenly to realize；The auxiliary material is high stalk, straw or the straw or like vegetable of phosphorus content.
- 4. sludge organism drying method for treating according to claim 3, it is characterised in that: the dewatered sludge it is aqueous Rate is 28%~32%.
- 5. sludge organism drying method for treating according to claim 4, it is characterised in that: the fermentation desiccation mud heap is every It is overthrown once, and fermentation, drying time are 10~12 days.
- 6. sludge organism drying method for treating according to claim 5, it is characterised in that: the base-material selects desiccation dirty Mud.
- 7. sludge organism drying method for treating according to claim 1 or 2 or 3 or 4 or 5 or 6, it is characterised in that: it is special Sign is: being stirred in step a is carried out in closed negative pressure space；The closed negative pressure space is equipped with deodoration system； The deodoration system is for being handled and being discharged generated foul smell in closed negative pressure space.
- 8. sludge organism drying method for treating according to claim 7, it is characterised in that: above-mentioned steps b, c are in sludge It is carried out in biological dewatered slot；The sludge organism desiccation slot is arranged in aerobic fermentation workshop；Its slot bottom is equipped with aerating system, Slot tail is equipped with deodorization extractor fan；The aerating system is used to carry out discontinuous forced ventilation to biological dewatered slot, so that compound Aerobic fermentation strain in microbial inoculum is preferably fermented.
- 9. it is a kind of by sludge organism drying method for treating according to any one of claims 1 to 8 treated dewatered sludge, it is special Sign is: the dewatered sludge is for supplementing soil or for making brick body raw material or for the energy of energy production.
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| CN104926052B (en) * | 2015-05-15 | 2017-11-17 | 刘婷 | A kind of method for sludge treatment of recoverable |
| CN104891759A (en) * | 2015-05-15 | 2015-09-09 | 刘婷 | Sludge high-temperature dehydrating agent |
| CN104926053A (en) * | 2015-05-15 | 2015-09-23 | 刘婷 | Sludge treatment method |
| CN105000776A (en) * | 2015-07-03 | 2015-10-28 | 天津霍普环保科技有限公司 | Sludge deep-dewatering bio-drying integrated treatment method |
| CN105217912B (en) * | 2015-09-14 | 2018-02-02 | 广州市净水有限公司 | A kind of municipal sludge efficient energy-saving quick biological drying technology |
| CN106865947B (en) * | 2017-03-17 | 2020-09-22 | 华南理工大学 | Sludge drying treatment method |
| CN108178484A (en) * | 2018-01-11 | 2018-06-19 | 临沂清宇环境资源综合利用研究院有限公司 | A kind of method that sludge combined stalk powder carries out the pre- desiccation of biology |
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| CN110156498A (en) * | 2019-04-30 | 2019-08-23 | 江苏思威博生物科技有限公司 | A kind of feces of livestock and poultry high temperature desiccation microbial inoculum and its application method |
| CN110591974A (en) * | 2019-10-17 | 2019-12-20 | 湖南洁源生物能源科技有限公司 | Preparation and use method of thermophilic microbial agent for leather sludge drying |
| CN112851064A (en) * | 2021-03-04 | 2021-05-28 | 天津科技大学 | Method for reducing odor release of sludge dried finished product |
| CN114804936B (en) * | 2022-05-10 | 2023-08-11 | 北京沃土天地生物科技股份有限公司 | Biological drying treatment method for organic solid waste |
| CN115490408A (en) * | 2022-09-14 | 2022-12-20 | 青岛绿洁坤环保科技有限公司 | Method for optimizing municipal sludge biological drying technology |
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