CN117598252A - Method for innocently treating urban domestic sludge by earthworm breeding - Google Patents
Method for innocently treating urban domestic sludge by earthworm breeding Download PDFInfo
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- CN117598252A CN117598252A CN202311604007.XA CN202311604007A CN117598252A CN 117598252 A CN117598252 A CN 117598252A CN 202311604007 A CN202311604007 A CN 202311604007A CN 117598252 A CN117598252 A CN 117598252A
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- earthworm
- breeding
- fermentation
- sludge
- earthworms
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- 239000010802 sludge Substances 0.000 title claims abstract description 49
- 241000361919 Metaphire sieboldi Species 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000009395 breeding Methods 0.000 title claims abstract description 33
- 230000001488 breeding effect Effects 0.000 title claims abstract description 33
- 238000000855 fermentation Methods 0.000 claims abstract description 29
- 230000004151 fermentation Effects 0.000 claims abstract description 29
- 241001233061 earthworms Species 0.000 claims abstract description 26
- 239000000463 material Substances 0.000 claims abstract description 23
- 238000003306 harvesting Methods 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000010871 livestock manure Substances 0.000 claims abstract description 9
- 238000009264 composting Methods 0.000 claims abstract description 7
- 239000002699 waste material Substances 0.000 claims abstract description 7
- 239000003895 organic fertilizer Substances 0.000 claims abstract description 6
- 230000003020 moisturizing effect Effects 0.000 claims abstract description 4
- 238000012216 screening Methods 0.000 claims abstract description 4
- 239000000203 mixture Substances 0.000 claims description 13
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 6
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 6
- 238000012258 culturing Methods 0.000 claims description 5
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 4
- LFVGISIMTYGQHF-UHFFFAOYSA-N ammonium dihydrogen phosphate Chemical compound [NH4+].OP(O)([O-])=O LFVGISIMTYGQHF-UHFFFAOYSA-N 0.000 claims description 3
- 229910000387 ammonium dihydrogen phosphate Inorganic materials 0.000 claims description 3
- 235000019837 monoammonium phosphate Nutrition 0.000 claims description 3
- 239000010865 sewage Substances 0.000 claims description 3
- 239000000292 calcium oxide Substances 0.000 claims description 2
- 235000012255 calcium oxide Nutrition 0.000 claims description 2
- 239000002689 soil Substances 0.000 claims description 2
- 239000003337 fertilizer Substances 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 210000003608 fece Anatomy 0.000 description 5
- 239000010902 straw Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000197 pyrolysis Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 235000013601 eggs Nutrition 0.000 description 1
- 239000002075 main ingredient Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000006012 monoammonium phosphate Substances 0.000 description 1
- 239000010813 municipal solid waste Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 235000021049 nutrient content Nutrition 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000010815 organic waste Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K67/00—Rearing or breeding animals, not otherwise provided for; New or modified breeds of animals
- A01K67/033—Rearing or breeding invertebrates; New breeds of invertebrates
- A01K67/0332—Earthworms
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23K—FODDER
- A23K10/00—Animal feeding-stuffs
- A23K10/10—Animal feeding-stuffs obtained by microbiological or biochemical processes
- A23K10/12—Animal feeding-stuffs obtained by microbiological or biochemical processes by fermentation of natural products, e.g. of vegetable material, animal waste material or biomass
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23K—FODDER
- A23K10/00—Animal feeding-stuffs
- A23K10/20—Animal feeding-stuffs from material of animal origin
- A23K10/26—Animal feeding-stuffs from material of animal origin from waste material, e.g. feathers, bones or skin
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23K—FODDER
- A23K10/00—Animal feeding-stuffs
- A23K10/30—Animal feeding-stuffs from material of plant origin, e.g. roots, seeds or hay; from material of fungal origin, e.g. mushrooms
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23K—FODDER
- A23K50/00—Feeding-stuffs specially adapted for particular animals
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Polymers & Plastics (AREA)
- Animal Husbandry (AREA)
- Zoology (AREA)
- Molecular Biology (AREA)
- Health & Medical Sciences (AREA)
- Food Science & Technology (AREA)
- Biotechnology (AREA)
- Physiology (AREA)
- Environmental Sciences (AREA)
- Biomedical Technology (AREA)
- Birds (AREA)
- Mycology (AREA)
- Sustainable Development (AREA)
- Microbiology (AREA)
- Biodiversity & Conservation Biology (AREA)
- Animal Behavior & Ethology (AREA)
- Botany (AREA)
- Biochemistry (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Fertilizers (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention provides a method for innocuous treatment of municipal domestic sludge by earthworm breeding, which belongs to the technical field of environmental protection, and specifically comprises the following steps: s1, mixing livestock manure, municipal domestic sludge and agricultural and forestry waste, performing composting fermentation, turning piles in the fermentation process, and adjusting the pH value to 6.5-8.0 after the fermentation is completed; s2, ridging the materials fermented in the step S1 on the ground to form an earthworm breeding bed body, and throwing earthworm seeds for breeding, wherein water is sprayed in the breeding process for moisturizing; s3, paving the materials obtained in the step S1 on the earthworm breeding bed body every week in the breeding process, harvesting after breeding for 3-5 weeks, screening the materials at the upper part of the earthworm breeding bed body in the harvesting process to obtain earthworms, and harvesting the materials at the lower part as organic fertilizer; and (5) repeating the step S2 for the next round of cultivation after the earthworms are sieved out. The method can carry out reduction and harmless treatment on the sludge, produce earthworms and organic fertilizers with high added value, and can be recycled.
Description
Technical Field
The invention belongs to the technical field of environmental protection, and particularly relates to a method for innocuously treating municipal domestic sludge by earthworm breeding.
Background
Urban domestic sludge can be treated in modes of landfill, composting, incineration, building material utilization, pyrolysis and the like, but the treatment cost in the modes of incineration, building material utilization and pyrolysis treatment is high, so that the method is not beneficial to large-scale popularization. And the urban sludge in China has higher nitrogen, phosphorus and potassium content, and landfill, incineration and the like destroy the utilization potential of a large amount of nutrients and organic matters in the sludge, so that the sludge is not beneficial to recycling. Therefore, the current sludge treatment mode is prone to recycling, and composting is one of the technologies with lower cost for stabilizing organic wastes, is a stabilized and harmless sludge treatment technology, and is one of the most effective modes for recycling sludge.
Disclosure of Invention
The invention provides a method for innocuous treatment of municipal domestic sludge by earthworm cultivation, which can reduce and innocently treat the sludge, produce earthworms and organic fertilizers with high added value and can be recycled.
The technical scheme of the invention is that the method for innocuously treating urban domestic sludge by earthworm breeding comprises the following steps:
s1, mixing livestock manure, municipal domestic sludge and agricultural and forestry waste for composting fermentation, and turning over the pile in the fermentation process; fermenting for 1-2 weeks, and adjusting the pH value to 6.5-8.0 after fermentation to obtain a fermentation mixture;
s2, ridging the S1 fermentation mixture on the ground to form an earthworm breeding bed body, and throwing earthworm seeds for breeding, wherein water is sprayed in the breeding process for moisturizing;
s3, the fermentation mixture obtained in the step S1 is additionally paved on the earthworm breeding bed body every week in the breeding process, the earthworms are collected after being bred for 3-5 weeks (3 weeks when the temperature in summer is high and 5 weeks when the temperature in winter is low), materials at the upper part of the earthworm breeding bed body are taken in the collection process and are screened out to form earthworms, and materials at the lower part are collected to be used as organic fertilizers; and (5) repeating the step S2 for the next round of cultivation after the earthworms are sieved out.
Further, the mass ratio of the livestock manure to the municipal domestic sludge to the agricultural and forestry waste is 45-60:30-50:5-20, preferably 55:40:5. Wherein, the livestock manure is preferably cow manure, the agriculture and forestry waste is preferably straw, and the livestock manure is crushed before use.
Further, the municipal domestic sludge is surplus sludge produced by municipal domestic sewage treatment plants, and the water content is 80-85%.
Further, turning the stack once every 2-3 days in the fermentation process in the step S1; acetic acid, citric acid, ammonium dihydrogen phosphate and/or quicklime water are used for adjusting pH.
Further, in the step S2, the width is 0.8-1.5 m, the thickness is 20-25cm, and the earthworm seed throwing density is 1.5-2 kg/square meter.
Further, in the S2 cultivation process, the humidity is controlled to be 60-75%.
Further, the thickness of the material obtained by the additional paving of the S1 in the S3 is 10-15 cm each time.
Further, the material at the upper part during S3 is the material with the thickness of 10-15 cm at the upper part.
Further, adult earthworms have a weight of 550 mg or more.
In the preferred scheme, urban domestic sludge with the thickness of 10-15 cm is paved at the top of the earthworm breeding bed body 3-7 days before harvesting.
The invention has the following beneficial effects:
according to the invention, the earthworms are cultivated by using the sludge, and as the earthworms belong to the hole-digging animals, the hole-digging animals naturally dig holes to generate an earthworm channel when the earthworms move in the sludge, so that the contact between the sludge and air is enhanced, the further fermentation of the sludge is promoted, meanwhile, the nutrient content and the microorganism content in the sludge are higher, the sludge is used as feed for the earthworms cultivation, the growth and the reproduction of the earthworms can be promoted more quickly, and the excrement after the digestion and the utilization of the earthworms can be used as an organic fertilizer.
According to the invention, livestock manure and agricultural and forestry waste are mixed into sludge for fermentation, ammonia substances are removed through fermentation, the water content and the void ratio are regulated, and then the sludge is used for earthworm cultivation, so that compared with the sludge for cultivation, the sludge for cultivation is directly adopted, and a large amount of young earthworms and earthworm eggs are contained in materials obtained after organic fertilizer and adult earthworms are collected, and the sludge for earthworm cultivation can be used for circulating cultivation.
According to the method, the pure sludge is temporarily paved at the top of the earthworm breeding bed body before harvesting, so that the organic matter content and the protein content of the sludge are higher compared with those of the fermentation mixture, and the yield of adult earthworms can be greatly improved.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to examples, but it will be understood by those skilled in the art that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention.
The source of municipal domestic sludge in the following examples and comparative examples was surplus sludge produced in municipal domestic sewage treatment plants, and the water content was 82%.
Example 1
The method for innocuously treating the municipal domestic sludge by earthworm cultivation comprises the following steps:
s1, mixing cow dung, municipal domestic sludge and straws according to a mass ratio of 55:40:5, carrying out composting fermentation, wherein the temperature in the pile is obviously increased in the composting process, then gradually decreasing, turning the pile when the temperature is reduced to 40 ℃, turning the upper side to the lower side to the middle to re-pile, turning the pile once every 2-3 days, completing fermentation after 2 weeks, testing the pH of the material to be 8.5, and regulating the pH to be 7.0 by adding monoammonium phosphate for mixing.
S2, ridge forming is carried out on the materials fermented in the step S1, the width is 1 m, the length is 50 m, the thickness is 25cm, an earthworm breeding bed body is formed, earthworm seeds are put in the earthworm breeding bed body for breeding, the putting density is 2 kg/square meter, water is sprayed in the breeding process for moisturizing, and the humidity of soil is controlled to be 65-75%;
s3, paving 10cm of the material obtained in the step S1 on the earthworm breeding bed body every week in the breeding process, harvesting after 3 weeks of breeding, taking the material 10cm above the earthworm breeding bed body in the harvesting process, screening out adult earthworms by using a screening machine and a manual combination method, and harvesting the lower material as an organic fertilizer; and (5) the materials after the adult earthworms are screened out are repeatedly used for the next round of cultivation in the step S2.
Comparative example 1 was identical to example 1 except that the mass ratio of sludge to cow dung was 75:25 without adding straw when fermenting the sludge.
Comparative example 2 was identical to example 1 except that fermented cow dung was used as earthworm feed, and straw and sludge were not added.
Comparative example 3 is the same as example 1 except that municipal solid waste is directly fermented as earthworm feed without adding straw and cow dung.
The method is adopted for culturing and harvesting for 3 periods, and the specific effects are shown in the following table 1. The unit of the yield of adult earthworms is Kg/t, namely the mass of adult earthworms harvested after each 1t of fermentation mixture is added.
TABLE 1
The organic fertilizer (wormcast) harvested in example 1 was tested, the main ingredients are shown in Table 2 below, and the test results are based on a dry basis.
TABLE 2
Example 2
2-1 treatment the same as in example 1 was harvested after 4 weeks of total cultivation, and each time a fermentation mixture was laid on the earthworm cultivation bed.
2-2 is treated in the same way as 2-1, and is harvested after 4 weeks of cultivation, wherein the materials are paved in the first 3 weeks as fermentation mixtures, and 10cm of municipal domestic sludge is paved at the top of the cultivation bed body without paving the fermentation mixtures when the materials are paved in the fourth week.
1 ton of material is put in 2-1 and 2-2 in the cultivation process, 25.4kg of adult earthworm is collected in 2-1; 33.02kg of adult earthworms are collected in the treatment of 2-2, and the fact that after the multi-time fermentation mixture is paved, pure sludge is paved once before collection can greatly improve the yield of adult earthworms.
The foregoing embodiments are merely illustrative of the technical idea and features of the present invention, and the present invention is not limited to the preferred embodiments. Within the technical scope of the present disclosure, the technical solution and the invention concept according to the present disclosure are equivalent to or improved from the above description, and all the equivalent changes or modifications are included in the scope of the present disclosure.
Claims (10)
1. A method for innocuous treatment of municipal domestic sludge by earthworm breeding is characterized by comprising the following steps:
s1, mixing livestock manure, municipal domestic sludge and agricultural and forestry waste for composting fermentation, and turning over the pile in the fermentation process; fermenting for 1-2 weeks, and adjusting the pH value to 6.5-8.0 after fermentation to obtain a fermentation mixture;
s2, ridging the S1 fermentation mixture on the ground to form an earthworm breeding bed body, and throwing earthworm seeds for breeding, wherein water is sprayed in the breeding process for moisturizing;
s3, paving the fermentation mixture obtained in the step S1 on the earthworm culturing bed body every week in the culturing process, harvesting after culturing for 3-5 weeks, screening out materials at the upper part of the earthworm culturing bed body into earthworms in the harvesting process, and harvesting the materials at the lower part as organic fertilizer; and (5) the materials after the adult earthworms are screened out are repeatedly used for the next round of cultivation in the step S2.
2. The method according to claim 1, characterized in that: the mass ratio of the livestock manure to the municipal domestic sludge to the agricultural and forestry waste is 45-60:30-50:5-20, preferably 55:40:5.
3. The method according to claim 1, characterized in that: the municipal domestic sludge is surplus sludge produced by municipal domestic sewage treatment plants, and the water content is 80-85%.
4. The method according to claim 1, characterized in that: turning the pile every 2-3 days in the fermentation process in the step S1; acetic acid, citric acid, ammonium dihydrogen phosphate and/or quicklime water are used for adjusting pH.
5. The method according to claim 1, characterized in that: and S2, during ridge forming, the width is 0.8-1.5 m, the thickness is 20-25cm, and the earthworm seed throwing density is 1.5-2 kg/square meter.
6. The method according to claim 1, characterized in that: in the S2 cultivation process, the soil humidity is controlled to be 60-75%.
7. The method according to claim 1, characterized in that: and S3, the thickness of the fermentation mixture obtained in the step S1 is 10-15 cm each time.
8. The method according to claim 1, wherein: and S3, the material at the upper part is 10-15 cm thick at the upper part during the collection.
9. The method according to claim 1, characterized in that: the weight of adult earthworms is more than 550 mg.
10. The method according to any one of claims 1 to 9, characterized by: and paving 10-15 cm thick municipal domestic sludge on the top of the earthworm breeding bed body 3-7 days before harvesting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311604007.XA CN117598252A (en) | 2023-11-28 | 2023-11-28 | Method for innocently treating urban domestic sludge by earthworm breeding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311604007.XA CN117598252A (en) | 2023-11-28 | 2023-11-28 | Method for innocently treating urban domestic sludge by earthworm breeding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117598252A true CN117598252A (en) | 2024-02-27 |
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ID=89949401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311604007.XA Pending CN117598252A (en) | 2023-11-28 | 2023-11-28 | Method for innocently treating urban domestic sludge by earthworm breeding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117598252A (en) |
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2023
- 2023-11-28 CN CN202311604007.XA patent/CN117598252A/en active Pending
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