CN110950712A - Sludge aerobic fermentation treatment method - Google Patents
Sludge aerobic fermentation treatment method Download PDFInfo
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- CN110950712A CN110950712A CN201911354053.2A CN201911354053A CN110950712A CN 110950712 A CN110950712 A CN 110950712A CN 201911354053 A CN201911354053 A CN 201911354053A CN 110950712 A CN110950712 A CN 110950712A
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F5/00—Fertilisers from distillery wastes, molasses, vinasses, sugar plant or similar wastes or residues, e.g. from waste originating from industrial processing of raw material of agricultural origin or derived products thereof
- C05F5/002—Solid waste from mechanical processing of material, e.g. seed coats, olive pits, almond shells, fruit residue, rice hulls
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Abstract
The invention discloses a sludge aerobic fermentation treatment method, which realizes a high-efficiency harmless, stable and resource sludge treatment method. The method utilizes the activity advantages of different biological strains and adds waste agricultural garbage as auxiliary materials to carry out a series of harmless aerobic fermentation treatments of modification, wall breaking, temperature rising and drying on the sludge. The sludge treatment process does not need to use a fermentation tank or a fermentation tank, the fermentation is carried out on the hardened ground, no useless residue is left in the treatment process, the zero emission of 100 percent of water in the production process is achieved, and the sludge is harmless to 100 percent. Solves the problems of secondary pollution such as smoke emission, soil pollution, underground water pollution and the like in the traditional sludge treatment and the problem that the residual useless waste residues need to be subjected to landfill treatment. And the fermentation product is an organic fertilizer, can be used for landscaping, cotton planting and soil improvement, and the utilization rate of the fermentation product reaches 100 percent, thereby changing waste into valuables in a real sense.
Description
Technical Field
The invention belongs to the field of biotechnology environmental protection, and relates to a sludge aerobic fermentation treatment method.
Background
The traditional sludge treatment methods comprise landfill, incineration, drying and conversion methods. The landfill method has the problems of large occupied area, short land resources, large potential safety hazard and secondary pollution to underground water and soil in particular. The sludge incineration method has the problems of large investment and high unit cost, and particularly, serious pollution to the atmosphere caused by dioxin carcinogens and smoke dust generated by incineration, and the sludge and coal slag after incineration are still not reduced and need secondary treatment and landfill. The sludge drying treatment method has the problems of incomplete treatment, incapability of completely converting sludge into usable resources, incapability of reducing or completely eliminating harmful substances, and follow-up treatment such as landfill. The treatment method for organic transformation by sludge breeding earthworms and the like has the problems of long time period, large occupied area and secondary land pollution.
Disclosure of Invention
In order to solve the defects and shortcomings, the invention provides a sludge aerobic fermentation treatment method.
A sludge aerobic fermentation treatment method comprises the following steps:
A. adding agricultural wastes such as corn bran, xylitol dregs and humic acid into sludge according to a certain proportion, and performing vibration stirring to adjust the sludge to a water content of 60%, an organic matter content of more than 45% and total nutrients such as nitrogen, phosphorus and potassium of more than 5%;
B. putting No. 1 strain into the sludge mixture according to a certain proportion, fermenting for 4 days after vibrating and stirring, raising the temperature to 50 ℃, and turning over and throwing twice;
C. putting No. 2 strain into the sludge mixture according to a certain proportion, fermenting for 5 days, raising the temperature to 70 ℃, turning over and throwing twice, and fermenting for 6-7 days at 70 ℃;
D. the temperature is reduced to about 30 ℃, the water content of the fermentation residues is 30 percent, and the organic matter content is more than 45 percent.
Preferably, the auxiliary materials of the agricultural garbage rich in organic matters are added in a proportion that 30% of corn bran, 20% of xylitol residues and 0-5% of humic acid are added to each ton of sludge, the humic acid is added to improve the color and the nitrogen, phosphorus and potassium content of the organic fertilizer and can be selectively added, and the proportion of the humic acid is preferably 5%.
Preferably, the strain No. 1 in the step B is a wall-broken strain biological population.
Preferably, the adding proportion of the No. 1 strain is 2 kg of the No. 1 strain added to each ton of sludge.
Preferably, the No. 2 strain in the step C is a high-temperature zymocyte biological population.
Preferably, the adding proportion of the No. 2 strain is 0.5 kg of the No. 2 strain put in each ton of sludge.
Preferably, the aerobic fermentation method does not adopt a fixed fermentation tank and a fermentation tank, and directly uses a factory building with a hardened ground as a fermentation field, so that the fermentation field in the step B or C is the hardened ground.
Preferably, the preparation method of the organic fertilizer adopts the sludge aerobic fermentation method.
Preferably, the organic fertilizer is powdery organic fertilizer.
The process of the invention has the following implementation mode: will be rich in organic matter agricultural waste and mud at the batching machine and stir as required, send into the agitator with the material by the conveyer belt and stir and vibrate in, add No. 1 bacterial broken wall fungus simultaneously for to the sludge flocculating agent, indicate polyacrylamide, the mud shell of parcel is cut apart, is collapsed, and in the mud mixed material sent into fermentation field by the conveyer belt, at the biological of broken wall fungus in the biological shell of broken wall fungusBacteriaUnder the action of the group, the temperature of the sludge mixture is raised to 50 ℃ after being fermented for 4 days, the sludge mixture is turned over twice, and the No. 2 strain high-temperature fermentation organism is added at the same timeBacteriaAnd (3) fermenting for 5 days, heating the sludge mixture to about 70 ℃ under the action of high-temperature zymophyte, turning over twice, evaporating water in the sludge through high-temperature turning over, and increasing oxygen to enter the sludge mixture, so that the strain is propagated in the sludge more quickly, and the working efficiency is improved. After 7 days of continuous high-temperature fermentation, harmful substances in the sludge are effectively removed, and the content of organic matters reaches the national organic fertilizer standard.
The invention has the following beneficial effects: 1. the sludge treatment aims of harmlessness, stabilization and recycling of sludge are achieved; 2. the zero discharge of 100 percent of water in the sludge treatment process is achieved, the sludge is harmless to 100 percent, and no useless residual residue is generated in the sludge treatment process; 3. the utilization rate of sludge treatment products is 100 percent; 4. the aerobic fermentation method does not adopt a fixed fermentation tank and a fermentation tank, directly uses a factory building with hardened ground as a fermentation field, has changeable scale, is economical, simple and flexible, and has centralized and large-scale production; 5. the sludge product treated by the invention is an organic fertilizer which is rich in organic matters and meets the national regulation standard, and can be used for landscaping, cotton, flowers, plants, trees, lawns and soil improvement.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a process flow diagram of the present invention;
in the figure: 1. sludge; 2. a conveyor belt; 3. an electronic automatic dispensing machine; 4. auxiliary material I; 5. a second auxiliary material; 6. a third auxiliary material; 7. breaking cell wall of No. 1; 8. vibrating the agitator; 9. a fermentation field; 10. the temperature is increased for the first time by 50 ℃; 11. high temperature zymocyte No. 2; 12. turning for the first time and the second time; 13. the temperature is raised for the second time to 70 ℃; 14. turning for the third time and the fourth time; 15. a powdery organic fertilizer.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "horizontal", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only used for convenience of description of the present invention, and do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
A sludge aerobic fermentation treatment method comprises the following steps: the method comprises the following steps that sludge 1 is conveyed into an electronic automatic batching machine 3 through a conveyor belt 2, meanwhile, a first auxiliary material 4, a second auxiliary material 5 and a third auxiliary material 6 are added according to a proportion, corn bran, xylitol slag and humic acid which are selected by the auxiliary materials in the scheme are respectively added according to the proportion that each ton of sludge is added with 30% of the corn bran, 20% of the xylitol slag and 5% of the humic acid, the mixture is conveyed into a vibration stirrer 8 through the conveyor belt 2 after being batched, the auxiliary materials and the sludge are mechanically stirred and vibrated for 2 minutes in the stirrer, the organizational structure and the molecular modification of a flocculating agent polyacrylamide in the sludge are destroyed through the steps, and meanwhile, the raw water content of the sludge is reduced from 80% to 60%, the organic matter content is more than 45%, and the total content of nitrogen, phosphorus and potassium is more. The second step is that: 2 kilograms of No. 1 strain wall-breaking bacteria 7 are put in each ton of sludge, a complex enzyme preparation is selected in the embodiment, and the wall-breaking bacteria can carry out wall breaking, segmentation and disintegration on the polyacrylamide serving as a flocculant for wrapping the sludge. After the sludge is added, the sludge mixed material is conveyed to a fermentation field 9 by a conveyor belt 2 for fermentation, the temperature of the sludge is raised to about 50 ℃ for 10 about 4 days due to the action of wall-breaking bacteria, the aerobic fermentation method does not adopt a fixed fermentation tank and a fermentation tank, a factory building with hardened ground is directly used as the fermentation field, the scale can be large or small, and the method is economical, simple and flexible and has centralized and large-scale production. The third step: the sludge mixture is turned and thrown for the first time and 12 times, so that the sludge is mixed with various added auxiliary materials and additives more uniformly, and the sludge is promoted to have better air permeability by turning and throwing. The fourth step: during turning and throwing, the No. 2 strain 11 is thrown into the sludge mixture by the conveyor belt 2, the high-temperature rotten zymogen is selected, 0.5 kg of high-temperature rotten zymogen is thrown into each ton of sludge, and the temperature of the sludge is raised to about 70 ℃ in about 5 days 13. The fifth step: the temperature of the sludge mixture is kept at about 70 DEG C
And 5-6 days later, carrying out third turning and throwing 14 and fourth turning during the period, so as to quickly evaporate the excessive moisture in the sludge in a steam mode and reduce the moisture content to about 30 percent. And the turning and throwing ventilation can quickly input oxygen required by the survival of the biological strains, so that the propagation of the biological strains is accelerated, and the auxiliary materials added into the sludge are thoroughly decomposed. And a sixth step: after continuous high-temperature fermentation for 6 days, the powdery organic fertilizer 15 is produced, all harmful substances hidden in the sludge, such as the number of faecal coliform groups and the death rate of ascarid eggs, reach the national specified standards, and the heavy metals reach the national heavy metal standards of the organic fertilizer by adding the dilution of auxiliary materials and the silkworm feeding of microbial floras. The test results of the fermented powdery organic fertilizer 15 are shown in table 1, which are indexes shown in the test report issued by the product quality supervision and inspection institute of Jilin province. The temperature is naturally reduced to normal temperature, waste sludge is converted into organic fertilizer, and the whole process cycle needs 15-16 days.
Table 1: organic fertilizer quality detection report
| Serial number | Inspection item | Unit of | Technical requirements | Test results | Single item of conclusion | Remarks for note |
| 1 | Appearance of the product | / | Brown or grey brown, granular or Powdery, uniform, no odor, no Mechanical impurities | Brown, powdery, uniform and no malignant No mechanical impurities | Qualified | / |
| 2 | Mass fraction of total nutrients (N + P2O5+ K2O) (to dry Base meter) | % | ≥5.0 | 5.2 | Qualified | / |
| 3 | Mass fraction of total nitrogen (N) (on a dry basis) | % | / | 1.07 | / | / |
| 4 | Mass fraction of total phosphorus (P2O 5) (on a dried basis) | % | / | 2.68 | / | / |
| 5 | Mass fraction of total potassium (K2O) (on a dried basis) | % | / | 1.48 | / | / |
| 6 | Mass fraction of organic matter (on a drying basis) | % | ≥45 | 49 | Qualified | / |
| 7 | Mass fraction of water (fresh sample) | % | ≤30 | 26 | Qualified | / |
| 8 | PH value (pH) | / | 5.5~8.5 | 7.1 | Qualified | / |
| 9 | Total lead (Pb) (on a dry basis) | mg/kg | ≤50 | 25 | Qualified | / |
| 10 | Total cadmium (Cd) (on a drying basis) | mg/kg | ≤3 | Undetected (detection limit) 0.05mg/kg） | Qualified | / |
| 11 | Total chromium (Cr) (on a dried basis) | mg/kg | ≤150 | 24 | Qualified | / |
| 12 | Total arsenic (As) (on a drying basis) | mg/kg | ≤15 | 2 | Qualified | / |
| 13 | Total mercury (Hg) (on a dried basis) | mg/kg | ≤2 | Undetected (detection limit) 0.02mg/kg） | Qualified | / |
| 14 | Fecal coliform population | Per g of | ≤100 | ＜3.0 | Qualified | / |
| 15 | Death rate of ascarid eggs | % | ≥95 | 100 | Qualified | / |
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A sludge aerobic fermentation treatment method comprises the following steps:
A. adding agricultural wastes such as corn bran, xylitol dregs and humic acid into sludge according to a certain proportion, stirring and vibrating to adjust the sludge to a water content of 60%, an organic matter content of more than 45% and total nutrients such as nitrogen, phosphorus and potassium of more than 5%;
B. putting No. 1 strain into the sludge mixture according to a certain proportion, fermenting for 4 days after vibrating and stirring, raising the temperature to 50 ℃, and turning over and throwing twice;
C. putting No. 2 strain into the sludge mixture according to a certain proportion, fermenting for 5 days, raising the temperature to 70 ℃, turning over and throwing twice, and fermenting for 6-7 days at 70 ℃;
D. the temperature is reduced to about 30 ℃, the water content of the fermentation residues is 30 percent, and the organic matter content is more than 45 percent.
2. The aerobic fermentation treatment method for sludge as claimed in claim 1, wherein: the agricultural garbage comprises the auxiliary materials of 30% of corn bran, 20% of xylitol residues and 0-5% of humic acid in each ton of sludge.
3. The aerobic fermentation treatment method for sludge as claimed in claim 1, wherein: and the No. 1 strain in the step B is a wall-broken bacterium biological population.
4. The aerobic fermentation treatment method for sludge as claimed in claim 1 or 3, wherein: the adding proportion of the No. 1 strain is 2 kg of the No. 1 strain added into each ton of sludge.
5. The aerobic fermentation treatment method for sludge as claimed in claim 1, wherein: and C, the No. 2 strain is a high-temperature zymophyte biological population.
6. The aerobic fermentation treatment method for sludge as claimed in claim 1 or 5, wherein: the adding proportion of the No. 2 strain is 0.5 kg of the No. 2 strain put in each ton of sludge.
7. The aerobic fermentation treatment method for sludge as claimed in claim 1, wherein: the fermentation field in the step B or C is a hardened ground.
8. A preparation method of an organic fertilizer is characterized by comprising the following steps: the organic fertilizer is prepared by the sludge aerobic fermentation method of claim 1.
9. The preparation method of the organic fertilizer according to claim 8, characterized in that: the organic fertilizer is powdery organic fertilizer.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101857470A (en) * | 2010-05-26 | 2010-10-13 | 昆明光宝生物技术工程有限公司 | Method for rapidly composting sludge |
| CN102092918A (en) * | 2011-01-14 | 2011-06-15 | 中环保水务投资有限公司 | Biological drying method for treating urban domestic dewatered sludge |
| CN104291925A (en) * | 2013-07-19 | 2015-01-21 | 北京东祥环境科技有限公司 | Method for producing biological organic compound fertilizer by processing municipal domestic sludge through three-step technology |
| CN110316921A (en) * | 2018-03-30 | 2019-10-11 | 福建鑫盛润环境咨询合伙企业(有限合伙) | A method of domestic sludge is disposed using superhigh temperature aerobic microbiological fermentation process |
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- 2019-12-25 CN CN201911354053.2A patent/CN110950712A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101857470A (en) * | 2010-05-26 | 2010-10-13 | 昆明光宝生物技术工程有限公司 | Method for rapidly composting sludge |
| CN102092918A (en) * | 2011-01-14 | 2011-06-15 | 中环保水务投资有限公司 | Biological drying method for treating urban domestic dewatered sludge |
| CN104291925A (en) * | 2013-07-19 | 2015-01-21 | 北京东祥环境科技有限公司 | Method for producing biological organic compound fertilizer by processing municipal domestic sludge through three-step technology |
| CN110316921A (en) * | 2018-03-30 | 2019-10-11 | 福建鑫盛润环境咨询合伙企业(有限合伙) | A method of domestic sludge is disposed using superhigh temperature aerobic microbiological fermentation process |
Non-Patent Citations (1)
| Title |
|---|
| 刘建伟: "《污水生物处理新技术 第1版》", 30 September 2016, 中国建材工业出版社 * |
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