CN115636565A - Culture sludge treatment method - Google Patents
Culture sludge treatment method Download PDFInfo
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- CN115636565A CN115636565A CN202211049753.2A CN202211049753A CN115636565A CN 115636565 A CN115636565 A CN 115636565A CN 202211049753 A CN202211049753 A CN 202211049753A CN 115636565 A CN115636565 A CN 115636565A
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- sludge
- water content
- solid
- solid manure
- mixture
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- 239000010802 sludge Substances 0.000 title claims abstract description 93
- 238000000034 method Methods 0.000 title claims abstract description 55
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 71
- 210000003608 fece Anatomy 0.000 claims abstract description 63
- 239000007787 solid Substances 0.000 claims abstract description 54
- 239000010871 livestock manure Substances 0.000 claims abstract description 48
- 239000000463 material Substances 0.000 claims abstract description 30
- 239000010865 sewage Substances 0.000 claims abstract description 26
- 239000000203 mixture Substances 0.000 claims abstract description 24
- 239000007788 liquid Substances 0.000 claims abstract description 11
- 238000009360 aquaculture Methods 0.000 claims abstract description 9
- 244000144974 aquaculture Species 0.000 claims abstract description 9
- 238000009395 breeding Methods 0.000 claims abstract description 7
- 230000001488 breeding effect Effects 0.000 claims abstract description 7
- 238000002156 mixing Methods 0.000 claims abstract description 6
- 238000000926 separation method Methods 0.000 claims abstract description 4
- 230000018044 dehydration Effects 0.000 claims description 5
- 238000006297 dehydration reaction Methods 0.000 claims description 5
- 238000011085 pressure filtration Methods 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 abstract description 7
- 238000004064 recycling Methods 0.000 abstract description 2
- 238000000855 fermentation Methods 0.000 description 11
- 230000004151 fermentation Effects 0.000 description 11
- 239000003895 organic fertilizer Substances 0.000 description 4
- 238000009264 composting Methods 0.000 description 3
- 230000006641 stabilisation Effects 0.000 description 3
- 238000011105 stabilization Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 239000002361 compost Substances 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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Classifications
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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
- 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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- Treatment Of Sludge (AREA)
Abstract
The invention discloses a method for treating aquaculture sludge. 1) Carrying out solid-liquid separation on the breeding sewage to obtain first solid manure with the water content of 75-85% and separated sewage, and dehydrating the separated sewage to obtain sludge with the water content of 80-90%; 2) Mixing the first solid manure with sludge, wherein the using amount of the first solid manure is larger than that of the sludge by mass, so as to obtain a mixture; 3) And taking the mixture and carrying out filter pressing to obtain the material. By recycling and squeezing the sewage in the culture sewage treatment process, no extra cost is needed to buy dry auxiliary materials. The sludge is mixed with the first solid feces, the sludge serves as a skeleton agent of the first solid feces, and the first mixture is obtained and then squeezed to a first material meeting the requirement of a subsequent process, so that the sludge amount and cost required to be treated by the subsequent process are reduced, and the resource utilization efficiency is improved.
Description
Technical Field
The invention belongs to the technical field of aquaculture sewage treatment, and particularly relates to a method for treating aquaculture sludge.
Background
In the traditional sludge fermentation process, the existing screw stacking machine or the filter press can not filter and press the sludge to the water content of about 65 percent in one step, and the sludge with the water content of about 90 percent can be obtained by one-time filter pressing. Therefore, after the aquaculture sewage is once squeezed by the screw stacking machine, sludge with the water content of 90% is generated. Then, a large amount of sawdust, wood chips and rice hull auxiliary materials (dry materials with the water content of less than 12%) are added and mixed with sludge with the water content of 90% to form a mixture with the water content of 65%, and fermentation is carried out. This results in a substantial increase in the amount of sludge that needs to be treated in the subsequent process. In practice, about 1 ton of sludge needs to be added with 0.47 ton of auxiliary materials, and the increment is about 147 percent. The calculated formula for 147% increase is: (1-12%) (1-90%) × 1=65% (x + 1), i.e. x =47%. Therefore, the sludge treatment process in the prior art has higher cost, and the required dry auxiliary materials are increased, thereby being not beneficial to the full utilization of resources.
Disclosure of Invention
The invention aims to provide a culture sludge treatment method, which has the advantages of reducing the sludge amount and cost required to be treated by a subsequent sludge treatment process and improving the resource utilization efficiency.
The method for treating the culture sludge comprises the following steps:
1) Carrying out solid-liquid separation on the breeding sewage to obtain first solid manure with the water content of 75-85% and separated sewage, and dehydrating the separated sewage to obtain sludge with the water content of 80-90%;
2) Mixing the first solid manure with sludge, wherein the using amount of the first solid manure is more than or equal to that of the sludge by mass, so as to obtain a mixture;
3) And taking the mixture and carrying out filter pressing to obtain the material.
The obtained material meets the water content requirement of the subsequent coarse composting process.
Preferably, the water content of the mixture is 76-87%, and the water content of the obtained material is 66-70%.
Preferably, the first solid manure is subjected to pressure filtration to obtain second solid manure with the water content of 60-65%, and then the second solid manure is mixed with sludge.
Preferably, the water content of the mixture is 65-73%, and the water content of the obtained material is 59.7-67.7%.
The excrement in the breeding sewage treatment process is recycled and secondarily squeezed, so that dry auxiliary materials are not needed to be purchased at extra cost. The water content of the second solid manure obtained after twice squeezing is lower, the sludge is mixed with the second solid manure, the sludge serves as a skeleton agent of the second solid manure, and the mixture is squeezed to meet the requirement of a subsequent process, so that the sludge amount and cost required by the subsequent process are reduced, and the resource utilization efficiency is improved.
Preferably, the first solid manure or the second solid manure and the sludge are mixed according to the mass ratio of 2-3:1.
In some embodiments, the first solid manure is obtained by solid-liquid separation, the dehydration is performed by a laminated spiral sludge dehydrator, and the filter pressing is performed by a filter press.
Preferably, the weight ratio of the first solid manure or the second solid manure to the sludge is 2:1.
preferably, the weight ratio of the first solid manure or the second solid manure to the sludge is 3:1.
preferably, the water content of the first solid manure is 80%, the water content of the sludge is 85%, the water content of the mixture is 82%, and the water content of the material is 67.0%.
Preferably, the water content of the first solid manure is 80%, the water content of the sludge is 85%, the water content of the second solid manure is 63%, the water content of the mixture is 70%, and the water content of the material is 65.7%.
The method for treating the culture sludge has the following beneficial effects:
by recycling and squeezing the sewage in the culture sewage treatment process, no extra cost is needed to buy dry auxiliary materials. The sludge is mixed with the first solid feces, the sludge serves as a skeleton agent of the first solid feces, and the first mixture is obtained and then squeezed to a first material meeting the requirement of a subsequent process, so that the sludge amount and cost required to be treated by the subsequent process are reduced, and the resource utilization efficiency is improved.
Drawings
FIG. 1 is a process flow diagram.
The specific implementation mode is as follows:
in order to make those skilled in the art better understand the technical solution of the present invention, the following detailed description of the embodiments of the present invention is given.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Herein, the terms "first", "second", "third", etc. are used for distinguishing different objects, and are not used for describing a particular order. As used herein, the terms "a", "an", and "the" are used interchangeably, and the term "a" and "an" are used interchangeably.
Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
Sludge treatment (sludge treatment) is a process for reducing, stabilizing and detoxifying sludge, such as concentration, conditioning, dehydration, stabilization, drying or incineration.
The split belt filter press and the laminated screw sludge dewatering machine are common parts or purchased parts, and the person skilled in the art can select corresponding models, specifications and parameters according to actual requirements.
The filter pressing is formed by the filter pressing of a split type belt filter press, and the dehydration is formed by the dehydration of a laminated spiral sludge dehydrator.
The water content was measured with a moisture meter. It is understood that the moisture meter is a general or procurement item, and those skilled in the art can select the corresponding model, specification and parameters according to actual needs. The water content can be calibrated by adopting the water content by weight, namely wt%.
The present invention will be described in further detail with reference to specific examples, but the present invention is not limited thereto.
Example 1:
the method for treating the culture sludge comprises the following steps:
separating the breeding sewage by a solid-liquid separator to obtain first solid manure (solid) and sewage (liquid), wherein the water content of the first solid manure is 75-85%, refluxing the separated sewage into a sewage adjusting tank, and dehydrating by a laminated spiral sludge dehydrator to obtain sludge with the water content of 80-90%.
Wherein, the solid-liquid separator separates out the feces (solid) with the water content of 75-85 percent, and the feces (solid) is conveyed to a split type belt filter press for secondary filter pressing to obtain secondary solid feces with the water content of 60-65 percent.
Taking a split type belt filter press to filter out secondary solid manure with the water content of 60-65%; and (3) pressing and filtering the sludge with the water content of 80-90% by using a laminated spiral sludge dewatering machine. 1-3 parts of excrement according to mass ratio: mixing the sludge 1 in proportion, and enabling the sludge to serve as a skeleton agent of the excrement (the sludge with the water content of 80-90 percent cannot be squeezed for the second time under the condition of no skeleton agent due to the physical property of the sludge), so as to obtain a mixture with the water content of 65-78 percent.
And taking the mixture, putting the mixture into a split type belt filter press again, wherein the pressure of the split type belt filter press is 0.4-0.8mpa, so that 59.7-73.4% of the material is obtained, and the water content requirement of the subsequent rough composting process is met.
The process data are reported in table 1:
TABLE 1
The water content of the process data 1 to 15 is the water content by weight, namely wt%.
As can be seen from process data 1 to 5, the ratio of 3 (feces): 1 (mud) is mixed in proportion, so that a second material with the water content of about 62 percent can be obtained, the subsequent organic fertilizer fermentation process is facilitated, and the time required by fermentation can be reduced.
As can be seen from process data 11 through 15, the ratio of 1 (stool): 1 (mud) to obtain a second material with the water content of about 68 percent, and continuously performing the organic fertilizer fermentation process, wherein the time required by fermentation is prolonged.
As can be seen from process data 6 to 10, the ratio of 2 (feces): 1 (mud) is mixed according to a proportion to obtain a second material with the water content of about 65 percent, which is between 3 (feces): 1 (mud) and 1 (manure): 1 (mud). Therefore, in the ratio of (feces) to (sludge) in the present invention, feces is more suitable than sludge.
Example 2:
the method for treating the culture sludge comprises the following steps (figure 1):
separating the breeding sewage by a solid-liquid separator to obtain first solid manure (solid) and sewage (liquid), wherein the water content of the first solid manure is 75-85%, refluxing the separated sewage into a sewage adjusting tank, and dehydrating by a laminated spiral sludge dehydrator to obtain sludge with the water content of 80-90%.
Taking first solid manure with the water content of 75-85% separated by a solid-liquid separator; and (3) taking the laminated spiral sludge dewatering machine to press and filter sludge with the water content of 80-90%. 1-3 parts of excrement according to mass ratio: mixing the sludge 1 in proportion, and enabling the sludge to serve as a skeleton agent of the excrement (the sludge with the water content of 80-90 percent cannot be squeezed for the second time under the condition of no skeleton agent due to the physical property of the sludge), so as to obtain a mixture with the water content of 76-88 percent.
And taking the mixture, putting the mixture into a split type belt filter press again, wherein the pressure of the split type belt filter press is 0.4-0.8mpa, and obtaining the material with the water content of 66.0-71.4%, which meets the water content requirement of the subsequent rough composting process. The materials can be conveyed to a drying device for fermentation to obtain coarse compost or commercial organic fertilizer.
The process data are reported in table 2:
TABLE 2
The water content of the process data 1 to 15 is the water content by weight, namely wt%.
As can be seen from process data 1 to 5, the ratio of 3 (feces): 1 (mud) proportion mixes, can obtain the moisture content and reach about 69% first material, is favorable to subsequent fertilizer fermentation process, and the fermentation required time can reduce.
As can be seen from process data 11 through 15, the ratio of 1 (stool): 1 (mud) is mixed in proportion, so that a first material with the water content of about 70 percent can be obtained, the organic fertilizer fermentation process can be continuously carried out, but the time required by fermentation is prolonged.
As can be seen from process data 6 to 10, the ratio of 2 (feces): 1 (mud) to obtain a first material with water content of about 66%, so that the proportion of the manure to the mud is proper.
The sludge treatment method of the invention recycles and treats the feces which are necessary products for treating the breeding sewage, does not need to purchase additional cost, and greatly reduces the sludge amount required to be treated by the subsequent process. Thereby realizing the purposes of reduction, stabilization and harmlessness of sludge treatment.
According to the sludge treatment method, the excrement is a necessary product for treating the culture sewage, and the sludge is not purchased at extra cost, so that the sludge amount required to be treated in the subsequent process is greatly reduced. By comparing the embodiment 1 with the embodiment 2, the effect of mixing the first solid manure and the sludge is better when the manure is recycled and the second solid manure is obtained by secondary pressing and then the first solid manure and the sludge are obtained by only primary pressing. After secondary pressing, the sludge of 1 ton is reduced to 0.28 ton and reduced to 28%. The formula for calculating decrement is: (1-90%) 1= (1-65%) x, i.e. x =0.28. It can be seen that the sludge amount required to be treated by the subsequent process is reduced from 147% to 28% by the sludge treatment method of the present invention, thereby achieving the reduction, stabilization and harmlessness of the sludge treatment.
Claims (9)
1. A method for treating aquaculture sludge is characterized by comprising the following steps:
1) Carrying out solid-liquid separation on the breeding sewage to obtain first solid manure with the water content of 75-85% and separated sewage, and dehydrating the separated sewage to obtain sludge with the water content of 80-90%;
2) Mixing the first solid manure with sludge, wherein the using amount of the first solid manure is more than or equal to that of the sludge by mass to obtain a mixture;
3) And taking the mixture and carrying out filter pressing to obtain the material.
2. The method for treating aquaculture sludge according to claim 1, wherein the water content of the mixture is 76-87%, and the water content of the obtained material is 66-70%.
3. The method for treating the culture sludge according to claim 1, wherein the first solid manure is subjected to pressure filtration to obtain second solid manure with the water content of 60-65%, and then the second solid manure is mixed with the sludge.
4. The culture sludge treatment method according to claim 3, wherein the water content of the mixture is 65-73%, and the water content of the obtained material is 59.7-67.7%.
5. The method for treating aquaculture sludge according to claim 1 or 3, wherein the first solid manure or the second solid manure and the sludge are mixed in a mass ratio of 2-3:1.
6. The culture sludge treatment method according to claim 1 or 3, wherein the first solid manure is obtained by separating with a solid-liquid separator, the dehydration is performed by a laminated screw sludge dehydrator, and the filter pressing is performed by a filter press.
7. The method according to claim 1 or 3, wherein the weight ratio of the first solid manure or the second solid manure to the sludge is 2:1 or 3:1.
8. the method for treating the aquaculture sludge according to claim 1, wherein the water content of the first solid manure is 80%, the water content of the sludge is 85%, the water content of the mixture is 82%, and the water content of the material is 67.0%.
9. The method for treating the aquaculture sludge according to claim 3, wherein the water content of the first solid manure is 80%, the water content of the sludge is 85%, the water content of the second solid manure is 63%, the water content of the mixture is 70%, and the water content of the material is 65.7%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211049753.2A CN115636565A (en) | 2022-08-30 | 2022-08-30 | Culture sludge treatment method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211049753.2A CN115636565A (en) | 2022-08-30 | 2022-08-30 | Culture sludge treatment method |
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| CN115636565A true CN115636565A (en) | 2023-01-24 |
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| CN202211049753.2A Pending CN115636565A (en) | 2022-08-30 | 2022-08-30 | Culture sludge treatment method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07178397A (en) * | 1993-12-24 | 1995-07-18 | Kawasaki Steel Corp | Method for dehydrating organic sludge |
| CN102219333A (en) * | 2011-02-23 | 2011-10-19 | 青岛天人环境股份有限公司 | Treatment method of manure waste generated in process of soaking manure in water in breeding farm |
| CN204550363U (en) * | 2015-02-06 | 2015-08-12 | 何忠孝 | Miniature City septic tank ight soil recycling sludge is dissolved station |
| CN108503176A (en) * | 2017-04-08 | 2018-09-07 | 浙江威治环保科技有限公司 | Microwave improves dehydration and drying method for sludge treatment |
-
2022
- 2022-08-30 CN CN202211049753.2A patent/CN115636565A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07178397A (en) * | 1993-12-24 | 1995-07-18 | Kawasaki Steel Corp | Method for dehydrating organic sludge |
| CN102219333A (en) * | 2011-02-23 | 2011-10-19 | 青岛天人环境股份有限公司 | Treatment method of manure waste generated in process of soaking manure in water in breeding farm |
| CN204550363U (en) * | 2015-02-06 | 2015-08-12 | 何忠孝 | Miniature City septic tank ight soil recycling sludge is dissolved station |
| CN108503176A (en) * | 2017-04-08 | 2018-09-07 | 浙江威治环保科技有限公司 | Microwave improves dehydration and drying method for sludge treatment |
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