CN112456745B - Method for drying domestic sludge by aerobic microorganisms and application thereof - Google Patents
Method for drying domestic sludge by aerobic microorganisms and application thereof Download PDFInfo
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- CN112456745B CN112456745B CN202011545871.3A CN202011545871A CN112456745B CN 112456745 B CN112456745 B CN 112456745B CN 202011545871 A CN202011545871 A CN 202011545871A CN 112456745 B CN112456745 B CN 112456745B
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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
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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
- Y02W10/20—Sludge processing
Abstract
The application belongs to the field of sludge treatment, and relates to sludge treatment by using a bacterial bed, in particular to a method for drying domestic sludge by using aerobic microorganisms and application thereof. The method comprises the following steps: (1) bacterial bed construction; (2) bacterial bed activation; (3) bacterial bed operation; (4) bacterial bed screening. According to the method for drying the domestic sludge by using the aerobic microorganisms, the composite microbial agent is greatly propagated after chicken manure is activated, the composite microbial agent is further propagated along with degradation of organic matters in the sludge after being put into the domestic sludge, the bacterial bed is screened when the air permeability of the bacterial bed is deteriorated and heating is affected, the oversize is taken as a bacterial bed of the next circulation, the oversize is mainly wood blocks attached with the bacterial microorganisms, and the composite microbial agent is continuously paved on the bacterial bed for recycling after screening, and does not need to be sprayed again during recycling.
Description
Technical Field
The application belongs to the field of sludge treatment, and relates to sludge treatment by using a bacterial bed, in particular to a method for drying domestic sludge by using aerobic microorganisms and application thereof.
Background
The discharge amount of urban domestic sewage is increased, the sludge is used as solid waste in the sewage treatment process, the yield is also increased sharply, and the disposal problem of the sludge is increased. Most of the sludge is organic humus, and contains a large amount of pathogens, microorganisms, copper, lead, zinc, mercury and other heavy metal harmful components, even contains a small amount of trace elements and organic pollutants which are difficult to degrade, and if the sludge is improperly treated, the ecological environment is seriously damaged. At present, domestic sludge is mostly treated by stacking or landfill, and the treatment mode occupies a large amount of land resources, and meanwhile, heavy metal elements contained in the sludge permeate into soil and water sources to cause secondary pollution. The harmless treatment mode of the domestic sludge comprises the steps of taking the domestic sludge as a fertilizer or a soil conditioner, producing raw materials of cement, activating an active additive of a cementing material by alkali, carrying out incineration treatment and the like, wherein the incineration treatment can greatly reduce the sludge volume, kill pathogens, carbonize organic matters, and the sludge ash generated by incineration is rarely and effectively treated, so that secondary pollution is easily caused.
In the patent CN201410767079.0, heavy metals which are difficult to decompose in the sludge are separated out in advance through the adsorption of microorganisms; then the organic waste in the sludge is sterilized and ovum-killed under continuous high-temperature fermentation by microbial fermentation and curing, so that the nutrient substances in the sludge are furthest reserved, and the harmful substances are furthest decomposed, removed and passivated; finally, dehydrating and drying; however, the bacterial beds of this patent cannot be reused.
Disclosure of Invention
The application provides a method for drying domestic sludge by aerobic microorganisms and application thereof, and provides a technical problem that the aerobic microorganisms are used for drying the domestic sludge.
The technical scheme of the application is realized as follows:
the method for drying domestic sludge by using aerobic microorganisms comprises the following steps:
(1) Setting up a fungus bed: wood blocks are paved in a fungus bed according to a proportion, and then a composite microbial inoculum is sprayed;
(2) Bacterial bed activation: throwing chicken manure on the bacterial bed built in the step (1), uniformly mixing the chicken manure with the composite microbial agent, and activating microbial flora in the composite microbial agent;
(3) Bacterial bed operation: and (3) adding domestic sludge to the activated fungus bed in the step (2) every day, and uniformly mixing. Aerating for 1-2 times per day for 20-120min each time for 1-3 months;
(4) Bacterial bed screening: and (3) screening the fungus bed when the air permeability of the fungus bed is relatively poor, and recycling the screen material as the fungus bed of the next time.
The composite microbial inoculum in the step (1) is prepared by mixing candida lipolytica, bacillus amyloliquefaciens, grease degrading bacteria, filamentous bacteria, actinomycetes and nitrifying bacteria according to the mass ratio of 1:1:1.5:1:0.5:0.5.
And (2) adding 4-6L of the composite microbial inoculum into every 10t wood blocks in the step (1).
200-300kg of chicken manure is thrown on every 10t of fungus beds in the step (1) in the step (2), and the chicken manure is completed in 4 days.
The mass ratio of the activated fungus bed in the step (2) to the daily-added domestic sludge in the step (3) is 1 (0.02-0.1), wherein the water content of the domestic sludge is 40-98%, and the organic matter is more than or equal to 40%.
The temperature of the bacterial bed operation in the step (3) is 60-85 ℃, and the water content is 30-43%.
And (3) the aperture of the screen mesh screened in the step (4) is 5-30mm, the domestic sludge is stopped being added 2-5 days in advance before screening, the water content of the fungus bed is reduced, and the screening effect is improved.
The method is applied to aerobic drying of domestic sludge without a heat source.
The application has the following beneficial effects:
1. according to the method for drying the domestic sludge by using the aerobic microorganisms, the composite microbial agent is greatly propagated after chicken manure is activated, the composite microbial agent is further propagated along with degradation of the sludge after being put into the domestic sludge, the bacterial bed is screened when the air permeability of the bacterial bed is deteriorated and heating is affected, the oversize is taken as a bacterial bed of the next circulation, the oversize is mainly wood blocks attached with bacterial microorganisms, and the screened oversize is continuously paved on the bacterial bed for recycling, so that the composite microbial agent does not need to be sprayed during recycling.
2. The water content of the bacterial bed screen material is less than or equal to 43 percent, the organic matter is less than or equal to 15 percent, and the screen material can be used as an organic fertilizer, a soil conditioner, a building material, incineration power generation and the like; the domestic sludge does not need an external heat source or solid-liquid separation pretreatment in the treatment process, can be directly put into a bacterial bed, and has no sewage and no odor in the whole process.
Drawings
In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 shows the temperature-start stage of the bacterial bed of the aerobic microbial drying treatment of the activated sludge.
FIG. 2 shows the temperature-operating phase (1 group section at an average temperature of 3 days) of the bed of activated sludge aerobic microorganism drying treatment.
FIG. 3 shows the temperature-recovery stage of the bacterial bed of the sludge aerobic microorganism drying treatment.
FIG. 4 shows the water content of the bacterial bed of the aerobic microbial desiccation treatment of the activated sludge during the operation (1 group of sections at an average temperature of 3 days).
Fig. 5 is a process flow diagram.
Detailed Description
The technical solutions of the present application will be clearly and completely described in conjunction with the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without any inventive effort, are intended to be within the scope of the application.
The method for drying domestic sludge by using aerobic microorganisms comprises the following steps:
(1) Setting up a fungus bed: wood blocks are paved in a fungus bed according to a proportion, and then a composite microbial inoculum is sprayed;
(2) Bacterial bed activation: throwing chicken manure on the bacterial bed built in the step (1), uniformly mixing the chicken manure with the composite microbial agent, and activating microbial flora in the composite microbial agent;
(3) Bacterial bed operation: and (3) adding domestic sludge to the activated fungus bed in the step (2) every day, and uniformly mixing. Aerating for 1-2 times per day for 20-120min each time for 1-3 months;
(4) Bacterial bed screening: and (3) screening the fungus bed when the air permeability of the fungus bed is relatively poor, and recycling the screen material as the fungus bed of the next time.
The composite microbial inoculum in the step (1) is prepared by mixing candida lipolytica, bacillus amyloliquefaciens, grease degrading bacteria, filamentous bacteria, high-temperature actinomycetes and nitrifying bacteria according to the mass ratio of 1:1:1.5:1:0.5:0.5.
And (2) adding 4-6L of the composite microbial inoculum into every 10t wood blocks in the step (1).
200-300kg of chicken manure is thrown on every 10t of fungus beds in the step (1) in the step (2), and the chicken manure is completed in 4 days.
The mass ratio of the activated fungus bed in the step (2) to the daily-added domestic sludge in the step (3) is 1 (0.02-0.1), wherein the water content of the domestic sludge is 40-98%, and the organic matter is more than or equal to 40%.
The temperature of the bacterial bed operation in the step (3) is 60-85 ℃, and the water content is 30-43%.
And (3) the aperture of the screen mesh screened in the step (4) is 5-30mm, the domestic sludge is stopped being added 2-5 days in advance before screening, the water content of the fungus bed is reduced, and the screening effect is improved.
The method is applied to aerobic drying of domestic sludge without a heat source.
The composite microbial inoculum is candida lipolytica, bacillus amyloliquefaciens, grease degrading bacteria, filamentous bacteria, actinomycetes and nitrifying bacteria, and can be purchased from an alembic network.
Example 1
The application provides a method for drying domestic sludge by aerobic microorganisms and application thereof,
s1, bacterial bed construction
13 tons of wood blocks (40 m in width) are spread in bacterial beds 3 times. And adding 2L of the composite microbial inoculum after each tiling is completed. And after the last microbial inoculum is added, stirring and mixing uniformly, and finishing the establishment of the fungus bed. The composite microbial inoculum is prepared by mixing candida lipolytica, bacillus amyloliquefaciens, grease degrading bacteria, filamentous bacteria, actinomycetes and nitrifying bacteria according to the mass ratio of 1:1:1.5:1:0.5:0.5.
S2, activation of fungus bed
97kg of chicken manure is added into the constructed fungus bed every day for 4 days until the average temperature of the fungus bed is raised to above 55 ℃, the fungus bed is successfully activated, and the temperature of the fungus bed in the starting stage is shown in figure 1.
S3, running the fungus bed
After the bacterial bed is activated, 500kg of domestic sludge (the water content is 40-98%, the organic matters are more than or equal to 40%) is added every day, the mixture is uniformly stirred, the total operation period is 30X 3 days, and aeration is carried out for 1 time every day and 60 minutes every time in the process. During aeration, gas is blown in from the bottom of the fungus bed and blown out from the upper part. The operating temperature of the fungus bed is 65-85 ℃, the water content is 33-41%, and the temperature and water content distribution of the fungus bed in the operating stage are shown in figure 2 and figure 4.
S4, fungus bed screening
After the bacterial bed is continuously operated for 3 months, a large amount of inorganic sediment causes the bacterial bed to have greatly reduced air permeability and insufficient oxygen supply by microorganisms. The fungus bed temperature in the recovery phase is shown in FIG. 3.
And stopping adding the domestic sludge for 2 days, and sieving, wherein the aperture of the primary sieving is 15mm, and the aperture of the secondary sieving is 5mm. The bacterial bed is backfilled for recycling by twice screening of the oversize products, and the twice screening of the undersize products can be used for organic fertilizers, soil improvement agents, building material utilization, incineration power generation and the like.
Example 2
The application provides a method for drying domestic sludge by aerobic microorganisms and application thereof,
s1, bacterial bed construction
15 tons (45 m) of wood blocks are spread in bacterial beds 3 times. After each tiling is completed, 2.5L of the composite microbial inoculum is added. Stirring and mixing uniformly after the last microbial inoculum is added, and finishing the establishment of a fungus bed; the composite microbial inoculum is prepared by mixing candida lipolytica, bacillus amyloliquefaciens, grease degrading bacteria, filamentous bacteria, actinomycetes and nitrifying bacteria according to the mass ratio of 1:1:1.5:1:0.5:0.5.
S2, activation of fungus bed
75kg of chicken manure is added into the constructed fungus bed every day for 4 days until the average temperature of the fungus bed is raised to above 55 ℃, and the fungus bed is successfully activated.
S3, running the fungus bed
400kg of domestic sludge (with the water content of 40-98% and the organic matter of more than or equal to 40%) is added every day after the bacterial bed is activated, and the mixture is stirred uniformly, and is aerated for 2 times every day for 20min each time. During aeration, gas is blown in from the bottom of the fungus bed and blown out from the upper part. The running temperature of the fungus bed is 60-80 ℃, and the water content is 30-40%
S4, fungus bed screening
After the bacterial bed is continuously operated for 3 months, a large amount of inorganic sediment causes the bacterial bed to have greatly reduced air permeability and insufficient oxygen supply by microorganisms. Sieving is carried out after the domestic sludge is stopped being added for 3 days, the aperture of the primary sieving is 15mm, and the aperture of the secondary sieving is 5mm. The twice screening and sun-drying material backfilling bacterial bed can be recycled, and the twice screening and sun-drying material backfilling bacterial bed can be used for organic fertilizer, soil conditioner, building material utilization, incineration power generation and the like.
Example 3
The application provides a method for drying domestic sludge by aerobic microorganisms and application thereof,
s1, bacterial bed construction
15 tons (45 m) of wood blocks are spread in bacterial beds 3 times. And 3L of composite microbial inoculum is added after each tiling is completed. After the last bacterial agent is added, stirring and mixing uniformly, and after the bacterial bed is built, the composite bacterial agent is prepared by mixing candida lipolytica, bacillus amyloliquefaciens, grease degrading bacteria, filiform bacteria, actinomycetes and nitrifying bacteria according to the mass ratio of 1:1:1.5:1:0.5:0.5.
S2, activation of fungus bed
100kg of chicken manure is added into the constructed fungus bed every day for 4 days until the average temperature of the fungus bed is raised to above 55 ℃, and the fungus bed is successfully activated.
S3, running the fungus bed
600kg of domestic sludge (the water content is 40-98%, the organic matters are more than or equal to 40%) is added every day after the bacterial bed is activated, and the mixture is stirred uniformly, and is aerated for 2 times every day for 60 minutes each time. During aeration, gas is blown in from the bottom of the fungus bed and blown out from the upper part. The running temperature of the fungus bed is 65-85 ℃, and the water content is 32-38%
S4, fungus bed screening
After the bacterial bed is continuously operated for 3 months, a large amount of inorganic sediment causes the bacterial bed to have greatly reduced air permeability and insufficient oxygen supply by microorganisms. Sieving is carried out after the domestic sludge is stopped being added for 4 days, the aperture of the primary sieving is 15mm, and the aperture of the secondary sieving is 5mm. The twice screening and sun-drying material backfilling bacterial bed can be recycled, and the twice screening and sun-drying material backfilling bacterial bed can be used for organic fertilizer, soil conditioner, building material utilization, incineration power generation and the like.
Examples of the effects
The method for drying the domestic sludge by utilizing the aerobic microorganisms and the application thereof provided by the application have the advantages that the composite microbial agent is greatly propagated after being activated by chicken manure, the composite microbial agent is further propagated along with degradation of organic matters after being put into the domestic sludge, the bacterial bed is operated until the air permeability of the bacterial bed is poor, when heating is affected, the bacterial bed is screened, the oversize is taken as the bacterial bed of the next circulation, the oversize is mainly wood blocks attached with the bacterial microorganisms, and the composite microbial agent is continuously paved on the bacterial bed for recycling after screening.
The water content of the bacterial bed screen material is less than or equal to 43 percent, the organic matter is less than or equal to 15 percent, and the screen material can be used as an organic fertilizer, a soil conditioner, a building material, incineration power generation and the like; the domestic sludge does not need an external heat source or solid-liquid separation pretreatment in the treatment process, can be directly put into a bacterial bed, and has no sewage and no odor in the whole process.
The foregoing description of the preferred embodiments of the application is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the application.
Claims (5)
1. The method for drying the domestic sludge by using the aerobic microorganisms is characterized by comprising the following steps:
(1) Setting up a fungus bed: wood blocks are paved in a fungus bed according to a proportion, and then a composite microbial inoculum is sprayed; the composite microbial inoculum in the step (1) is prepared by mixing candida lipolytica, bacillus amyloliquefaciens, grease degrading bacteria, filamentous bacteria, actinomycetes and nitrifying bacteria according to the mass ratio of 1:1:1.5:1:0.5:0.5;
(2) Bacterial bed activation: throwing chicken manure on the bacterial bed built in the step (1), uniformly mixing the chicken manure with the composite microbial agent, and activating microbial flora in the composite microbial agent; 200-300kg of chicken manure is thrown on each 10t of fungus beds in the step (1) in the step (2), and the chicken manure is completed in 4 days;
(3) Bacterial bed operation: adding domestic sludge to the activated fungus bed in the step (2) every day, and uniformly mixing;
aerating for 1-2 times per day for 20-120min each time for 1-3 months; the mass ratio of the activated fungus bed in the step (2) to the daily-added domestic sludge in the step (3) is 1 (0.02-0.1), wherein the water content of the domestic sludge is 40-98%, and the organic matters are more than or equal to 40%;
(4) Bacterial bed screening: and (3) screening the fungus bed when the air permeability of the fungus bed is relatively poor, and recycling the screen material as the fungus bed of the next time.
2. The method for drying domestic sludge by using aerobic microorganisms according to claim 1, wherein 4-6L of the composite microbial agent is added to every 10t wood blocks in the step (1).
3. The method for drying treatment of domestic sludge by aerobic microorganisms according to claim 1, wherein: the temperature of the bacterial bed operation in the step (3) is 60-85 ℃, and the water content is 30-43%.
4. The method for drying treatment of domestic sludge by aerobic microorganisms according to claim 1, wherein: and (3) the aperture of the screen mesh screened in the step (4) is 5-30mm, the domestic sludge is stopped being added 2-5 days in advance before screening, the water content of the fungus bed is reduced, and the screening effect is improved.
5. Use of the method according to any one of claims 1-4 for aerobic drying of domestic sludge without a heat source.
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2020
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2010001169A (en) * | 2008-06-18 | 2010-01-07 | Makino Sogo Kenkyusho:Kk | Bacteria bed for treating garbage |
| JP2011240328A (en) * | 2010-04-23 | 2011-12-01 | Kanagawa Furniture Co Ltd | Method for treating object to be treated using microorganism |
| CN104785508A (en) * | 2015-05-07 | 2015-07-22 | 上海德瑾绿水科技有限公司 | Buckwheat hull bacteria bed for biochemical degradation of kitchen wastes and preparation and using method thereof |
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