CN109053321A - A kind of sludge carbon makees the compost method of auxiliary material - Google Patents
A kind of sludge carbon makees the compost method of auxiliary material Download PDFInfo
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- CN109053321A CN109053321A CN201810873371.9A CN201810873371A CN109053321A CN 109053321 A CN109053321 A CN 109053321A CN 201810873371 A CN201810873371 A CN 201810873371A CN 109053321 A CN109053321 A CN 109053321A
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/80—Soil conditioners
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
- C05D9/00—Other inorganic fertilisers
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
- C05F17/20—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation using specific microorganisms or substances, e.g. enzymes, for activating or stimulating the treatment
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
- C05F17/80—Separation, elimination or disposal of harmful substances during the treatment
-
- 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
- Y02W30/00—Technologies for solid waste management
- Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Biochemistry (AREA)
- Engineering & Computer Science (AREA)
- Biotechnology (AREA)
- General Chemical & Material Sciences (AREA)
- Microbiology (AREA)
- Molecular Biology (AREA)
- Toxicology (AREA)
- Pest Control & Pesticides (AREA)
- Soil Sciences (AREA)
- Inorganic Chemistry (AREA)
- Tropical Medicine & Parasitology (AREA)
- Fertilizers (AREA)
- Treatment Of Sludge (AREA)
Abstract
The present invention provides the compost methods that a kind of sludge carbon makees auxiliary material, including following key step: (1) being mixed in a certain ratio uniformly sludge, back-mixing material and sludge carbon, obtain mixed material；(2) mixed material in step (1) is put into fermentation cabin or fermentation reactor, is supplied oxygen by static forced ventilation mode to heap body, and regular turning；(3) after the compost time reaches design fermentation period, compost product is removed into fermentation cabin or fermentation reactor, a part is used for step (1) as back-mixing material.The invention has the following advantages: can prevent material compacting using loose, porous, lightweight sludge carbon as compost auxiliary material, improve ventilation oxygen supply effect；The part foul smell that composting process generation can be directly adsorbed from source is conducive to improve compost environment；Achievable derived from sludge product utilize the combination with Treatment of Sludge, do not need to carry out screening recycling to auxiliary material after compost, are conducive to simplify compost process.
Description
Technical field
The invention belongs to environmental protection technical field, it is related to the compost method that a kind of sludge carbon makees auxiliary material.
Background technique
With the fast development of China's urban wastewater treatment cause, sewage treatment plant's quantity is increasing, sewage treatment
The sludge quantity supervened in journey also increasingly increases.According to statistics, China's urban sewage treatment plant sludge year yield has reached at present
To 50,000,000 tons or so.Sludge main component include: ash content (containing the nutrients such as N, P, K), fixed carbon, volatile organic matter and
Moisture can be used the modes such as compost, carbonization and be handled.
Sludge composting refers to that microorganism carries out aerobic respiration effect generation higher temperature under aerobic conditions and makes to have in sludge
Machine object biodegrade, generates the process that property stablizes mature sludge, and the decomposed product after compost can be used as organic fertilizer and be used for soil
Ground improvement, afforestation etc..Sludge composting technology is primarily present following problems both at home and abroad at present:
(1) supplementary product onsumption amount is big: since moisture percentage in sewage sludge is high, density is big, being easily compacted, causes logical inside heap body in composting process
Wind is difficult, it is therefore desirable to the auxiliary materials such as a large amount of straw powders, peanut shell powder, sawdust are added, and above-mentioned auxiliary material density is small, volume is big, and
Yield has seasonality, is not easy storage transport.It is dirty that Chinese invention patent (CN 201310158220.2) proposes a kind of no auxiliary material
Mud compost method, but need to cultivate microorganism to prepare leavening, technology is complex, is unfavorable for engineering and promotes
Using；Chinese invention patent (CN201310077278.4) is using charcoal as auxiliary material, Chinese invention patent (CN
200810137214.8) using zeolite as auxiliary material, auxiliary material is recycled by screening after compost, but mixing, turn over throwing and
Input and output material process auxiliary material is easily broken, and the rate of recovery is difficult to ensure.
(2) it is difficult to collect processing for foul smell.A large amount of foul smell can be generated during sludge composting, and face is usually taken up an area in compost workshop
Product is larger, it is difficult to be fully sealed, foul smell collection processing is more difficult, has not only influenced workshop condition sanitary condition, but also be easy to periphery
Environment causes secondary pollution.
Sludge carbonization refers to that under high temperature, oxygen free condition, the moisture and volatile organic matter in sludge escape, in sludge
Grain surface forms numerous apertures, finally generates the process of loose porous sludge carbon.Sludge carbon is with density is small, porosity is high, ratio
The features such as surface increases, absorption property is strong, hydrophobic, but since its content of ashes is high, mechanical strength is low, lead to current sludge carbon
Purposes is relatively limited.The present invention is based on sludge carbon feature, innovation is proposed using sludge carbon as compost auxiliary material, to solve sludge
The problems of fertilizer.
Summary of the invention
The purpose of the present invention is to provide the compost methods that a kind of sludge carbon makees auxiliary material, to solve sludge composting auxiliary material source
Problem, and compost environment is improved by source deodorization.
To achieve the goals above, the present invention provides the following technical scheme that
A kind of sludge carbon makees the compost method of auxiliary material, including following key step:
Step (1): sludge, back-mixing material and sludge carbon are obtained into mixed material than being uniformly mixed by certain mass；
Step (2): mixed material in step (1) is put into fermentation cabin or fermentation reactor, static forced ventilation side is passed through
Formula is supplied oxygen to heap body, and carries out artificial or mechanical turning periodically to control heap temperature, material is prevented to be compacted；
Step (3): after the compost time reaches design fermentation period, removing fermentation cabin or fermentation reactor for compost product, and one
Part is used for step (1) as back-mixing material, and rest part is as organic fertilizer.
Preferably, moisture percentage in sewage sludge described in step (1) is 85% hereinafter, content of organics is 40 % or more.
Preferably, back-mixing material moisture content described in step (1) is 40 % hereinafter, grain diameter is not more than 20mm.
Preferably, sludge carbon moisture content described in step (1) is 15% hereinafter, grain diameter is 2mm ~ 10mm, specific surface area
For 500 ㎡/g or more.
Preferably, sludge, back-mixing material described in step (1), sludge carbon mass ratio be 100:(50 ~ 60): (10 ~ 20),
Mixed material moisture content is the % of 55 % ~ 65, and content of organics is 40 % or more, and carbon-nitrogen ratio is 20 ~ 30, and pH value is 6 ~ 9, and bulk density is
0.6 g/cm3~0.7g/cm3, porosity is the % of 30 % ~ 40, and grain diameter is not more than 20mm.
Preferably, waste height is 1.2m ~ 2.0m in step (2) fermentation cabin or fermentation reactor.
Preferably, step (2) the static forced ventilation intensity is 0.05 ~ 0.20(m3/ (min m3).
Preferably, step (2) is described artificial or the mechanical turning frequency are as follows: fermentation calefaction phase, heap temperature rise for the first time
To 55 DEG C~60 DEG C, turning is primary；It ferments the megathermal period, heap temperature is maintained at 55 DEG C~65 DEG C, and every 2d~5d turning is primary；Hair
Ferment cooldown period, heap temperature are lower than after 55 DEG C, and every 7d~12d turning is primary；When heap temperature drops to 35 DEG C hereinafter, and even
When temperature difference is no more than ± 2 DEG C within continuous two days, stop turning.
Preferably, step (3) fermentation period is 20d ~ 50d.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1, using loose, porous, lightweight sludge carbon as compost auxiliary material, material compacting can be prevented, improve ventilation oxygen supply effect；
Sludge carbon can provide attachment site and larger space for microbe survival, and surface functional group and fulvic acid substance can promote dirt
Mud compost humus molecular structure aromatization is conducive to improve compost effect.
2, sludge carbon has the characteristics that large specific surface area, adsorption capacity are strong, carries out compost, composting process after mixing with sludge
The part foul smell of generation can be adsorbed directly by sludge carbon, reduced foul smell discharge from source, be conducive to improve compost environment.
3, sludge composting is carried out as auxiliary material, it can be achieved that derived from sludge product utilize and Treatment of Sludge using sludge carbonized product
Combination, do not need to carry out screening recycling to auxiliary material after compost, be conducive to simplify compost process.
Detailed description of the invention
Fig. 1 is the compost method process flow chart that the present invention makees auxiliary material using sludge carbon.
Fig. 2 is sludge composting process temperature change curve in the embodiment of the present invention.
Specific embodiment
The invention will be further described with reference to the accompanying drawings and examples.According to following explanation and claims, originally
The advantages of invention and feature will become apparent from.It should be noted that attached drawing is all made of very simplified form and using non-accurate
Ratio, only for the purpose of facilitating and clarifying the purpose of the embodiments of the invention.
Embodiment
As described in Figure 1, a kind of sludge carbon makees the compost method of auxiliary material, including following key step:
(1) sludge, back-mixing material and sludge carbon are uniformly mixed by certain mass ratio, obtain mixed material；
(2) mixed material in step (1) is put into fermentation cabin or fermentation reactor, by static forced ventilation mode to heap
Body oxygen supply, and carry out artificial or mechanical turning periodically to control heap temperature, material is prevented to be compacted；
(3) after the material compost time reaches design fermentation period, compost product is removed into fermentation cabin or fermentation reactor, one
Divide and can be used as back-mixing material for step (1), rest part can be used as organic fertilizer for the betterment of land, afforestation etc..
Specifically, moisture percentage in sewage sludge described in step (1) is 80% ~ 85%, and content of organics is 50% ~ 65%.
Specifically, back-mixing material moisture content described in step (1) is 35% ~ 40%, and grain diameter is not more than 20mm.
Specifically, sludge carbon moisture content described in step (1) is 10% ~ 15%, and grain diameter is 5mm ~ 8mm.
Specifically, sludge, back-mixing material described in step (1), sludge carbon mass ratio be 6:3:1, mixed material is aqueous
Rate is the % of 60 % ~ 65, and content of organics is 40 % or more, and carbon-nitrogen ratio is 20 ~ 30, and pH value is 6 ~ 9, and bulk density is 0.6 g/cm3~
0.7g/cm3, porosity is the % of 30 % ~ 40, and grain diameter is not more than 20mm.
Specifically, step (2) the fermentation cabin form is slot type, and waste height is 1.5m ~ 2.0m.
Specifically, step (2) the static forced ventilation intensity is 0.05(m3/ (min m3) ~ 0.20(m3/ (min
m3).In this unit, the connotation that two m3 are represented is different, and one is aeration volume, and one is heap body volume.
Specifically, step (2) is described artificial or the mechanical turning frequency are as follows: the fermentation calefaction phase, heap temperature for the first time on
55 DEG C~60 DEG C are risen to, turning is primary；It ferments the megathermal period, heap temperature is maintained at 55 DEG C~65 DEG C, and every 2d~5d turning is primary；
Ferment cooldown period, and heap temperature is lower than after 55 DEG C, and every 7d~12d turning is primary；When heap temperature drop to 35 DEG C hereinafter, and
When continuous two days temperature differences are no more than ± 2 DEG C, stop turning.
Specifically, step (3) fermentation period is 20d.
It is handled after foul smell centralized collection using biological deodorizing in composting process, meets " emission standard for odor pollutants " GB
Discharge is concentrated after 14554 related requirement.As shown in Fig. 2, after compost 20d, product is aqueous for heap temperature variation in composting process
Rate is reduced to 35% ~ 38%, and oxygen consumption rate reaches 0.1(O2%)/min can meet hereinafter, seed germination index reaches 70% or more
" urban sewage treatment plant sludge disposes afforestation shale " (GB/T23486-2009) and " urban sewage treatment plant sludge
Dispose betterment of land shale " (GB/T24600-2009) standard requirements, resource utilization can be carried out.
It should be further noted that being in step (1) most initially only to be uniformly mixed sludge and sludge carbon, obtain
Mixed material obtains compost product after being then passed through step (2) and step (3), is added compost product section as back-mixing material
In step (1), in the early stage, the ratio of back-mixing material can be stepped up from 0, and the ratio of sludge carbon gradually reduces, until last shape
At stable state, mass ratio 100:(50 ~ 60 of sludge, back-mixing material, sludge carbon when stable state): (10 ~ 20).
According to a particular embodiment of the invention, sludge carbon is formed by dewatered sludge progress pyrolysis processing, the sludge carbon tune
Reason agent moisture content is 15% hereinafter, grain diameter is 2mm ~ 10mm, and specific surface area is 500 ㎡/g or more, the preparation of the sludge carbon
Processing step is as follows:
Step a: to urban wastewater treatment firm sedimentation basin generate sludge be carried out dehydrating, dewatered sludge moisture content be 70% ~
85%；
Step b: being granulated dewatered sludge in step a, and sludge returning is 5mm ~ 10mm；
Step c: heat drying is carried out to mud granule in step b, dewatered sludge moisture content is 10% ~ 30%；
Step d: pyrolysis processing is carried out to dewatered sludge in step c, generates sludge carbon.
Preferably, pyrolyzing sludge described in step d processing carry out under anaerobic, pyrolytic process heating rate be 10 DEG C/
Min ~ 30 DEG C/min, pyrolysis final temperature are 300 DEG C ~ 550 DEG C, and the final temperature duration is 30min ~ 120min.Heating rate, pyrolysis are eventually
Temperature and final temperature duration can determine that heating rate is got over according to factors such as mud organic substance content, moisture content, product requirements
Fastly, final temperature is higher, the duration is longer, in sludge organic matter be converted to pyrolysis gas ratio it is higher, the yield of sludge carbon is lower；
But temperature is too low or the reaction time is insufficient, then it is relatively low to may result in generated sludge carbon porosity, influences subsequent heap
Fertilizer efficiency fruit.
Foregoing description is only the description to present pre-ferred embodiments, not to any restriction of the scope of the invention, this hair
Any change, the modification that the those of ordinary skill in bright field does according to the disclosure above content, belong to the protection of claims
Range.
Claims (9)
1. the compost method that a kind of sludge carbon makees auxiliary material, it is characterised in that including following key step:
Step (1): sludge, back-mixing material and sludge carbon are obtained into mixed material than being uniformly mixed by certain mass；
Step (2): mixed material in step (1) is put into fermentation cabin or fermentation reactor, static forced ventilation side is passed through
Formula is supplied oxygen to heap body, and carries out artificial or mechanical turning periodically to control heap temperature, material is prevented to be compacted；
Step (3): after the compost time reaches design fermentation period, removing fermentation cabin or fermentation reactor for compost product, and one
Part is used for step (1) as back-mixing material, and rest part is as organic fertilizer.
2. the compost method that sludge carbon as described in claim 1 makees auxiliary material, which is characterized in that sludge is aqueous in the step (1)
Rate is 85% hereinafter, content of organics is 40 % or more.
3. the compost method that sludge carbon as described in claim 1 makees auxiliary material, which is characterized in that back-mixing material contains in the step (1)
Water rate is 40 % hereinafter, grain diameter is not more than 20mm.
4. the compost method that sludge carbon as described in claim 1 makees auxiliary material, which is characterized in that sludge carbon contains in the step (1)
Water rate is 15% hereinafter, grain diameter is 2mm ~ 10mm, and specific surface area is 500 ㎡/g or more.
5. the compost method that sludge carbon as described in claim 1 makees auxiliary material, which is characterized in that sludge, back-mixing in the step (1)
Expect, the mass ratio of sludge carbon is 100:(50 ~ 60): (10 ~ 20), mixed material moisture content are the % of 55 % ~ 65, and content of organics is
40 % or more, carbon-nitrogen ratio are 20 ~ 30, and pH value is 6 ~ 9, and bulk density is 0.6 g/cm3~0.7g/cm3, porosity is the % of 30 % ~ 40,
Grain partial size is not more than 20mm.
6. the compost method that sludge carbon as described in claim 1 makees auxiliary material, which is characterized in that in the step (2) fermentation cabin or
Waste height is 1.2m ~ 2.0m in person's fermentation reactor.
7. the compost method that sludge carbon as described in claim 1 makees auxiliary material, which is characterized in that static in the step (2) to force
Air flux is 0.05 ~ 0.20(m3/ (min m3).
8. the compost method that sludge carbon as described in claim 1 makees auxiliary material, which is characterized in that it is artificial in the step (2) or
The mechanical turning frequency are as follows: fermentation calefaction phase, heap temperature rise to 55 DEG C~60 DEG C for the first time, and turning is primary；It ferments the megathermal period, heap
Temperature is maintained at 55 DEG C~65 DEG C, and every 2d~5d turning is primary；Ferment cooldown period, and heap temperature is lower than after 55 DEG C, every 7d
~12d turning is primary；When heap temperature drop to 35 DEG C hereinafter, and continuous two days temperature differences be no more than ± 2 DEG C when, stop turning over
Heap.
9. the compost method that sludge carbon as described in claim 1 makees auxiliary material, which is characterized in that fermentation period in the step (3)
For 20d ~ 50d.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108997037A (en) * | 2018-08-10 | 2018-12-14 | 江苏思威博生物科技有限公司 | A kind of municipal sludge compositing system |
| CN109824405A (en) * | 2019-03-20 | 2019-05-31 | 苏州雨苏环境科技有限公司 | A kind of sludge carbon organic fertilizer production technique |
| CN109851200A (en) * | 2019-02-18 | 2019-06-07 | 派石环境技术(北京)有限公司 | Sludge back-mixing processing system and method |
| CN113402317A (en) * | 2021-08-06 | 2021-09-17 | 东北大学 | Method for reducing carbon emission through cooperation of hydrothermal carbonization and organic solid waste high-temperature fermentation |
| CN113912430A (en) * | 2021-11-09 | 2022-01-11 | 沈阳建筑大学 | Method for treating rural multi-source organic solid waste |
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| CN102557368A (en) * | 2010-12-20 | 2012-07-11 | 机科发展科技股份有限公司 | High-temperature aerobic composting treatment process for municipal sludge |
| CN103396815A (en) * | 2013-08-05 | 2013-11-20 | 中国科学院城市环境研究所 | Method for preparing carbon materials by use of sludge |
| CN104045388A (en) * | 2013-03-11 | 2014-09-17 | 同济大学 | Use of charcoal as exogenous conditioning agent in sludge composting |
| CN104987216A (en) * | 2015-07-11 | 2015-10-21 | 樊连雪 | Sludge carbon-based bio-organic fertilizer and preparation method thereof |
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2018
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102557368A (en) * | 2010-12-20 | 2012-07-11 | 机科发展科技股份有限公司 | High-temperature aerobic composting treatment process for municipal sludge |
| CN104045388A (en) * | 2013-03-11 | 2014-09-17 | 同济大学 | Use of charcoal as exogenous conditioning agent in sludge composting |
| CN103396815A (en) * | 2013-08-05 | 2013-11-20 | 中国科学院城市环境研究所 | Method for preparing carbon materials by use of sludge |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108997037A (en) * | 2018-08-10 | 2018-12-14 | 江苏思威博生物科技有限公司 | A kind of municipal sludge compositing system |
| CN109851200A (en) * | 2019-02-18 | 2019-06-07 | 派石环境技术(北京)有限公司 | Sludge back-mixing processing system and method |
| CN109851200B (en) * | 2019-02-18 | 2022-05-31 | 派石环境技术(北京)有限公司 | Sludge back-mixing treatment system and method |
| CN109824405A (en) * | 2019-03-20 | 2019-05-31 | 苏州雨苏环境科技有限公司 | A kind of sludge carbon organic fertilizer production technique |
| CN113402317A (en) * | 2021-08-06 | 2021-09-17 | 东北大学 | Method for reducing carbon emission through cooperation of hydrothermal carbonization and organic solid waste high-temperature fermentation |
| CN113912430A (en) * | 2021-11-09 | 2022-01-11 | 沈阳建筑大学 | Method for treating rural multi-source organic solid waste |
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Application publication date: 20181221 |